Laboratoire National des Champs Magnétiques Pulsés CNRS – INSA

Laboratoire National des Champs Magnétiques Pulsés
CNRS – INSA – UPS - UMR 5147
BILAN SCIENTIFIQUE
Laboratoire des Champs Magnétiques Pulsés
LNCMP – UMR 5147
Du 01/01/2005 au 31/12/08
Etablissements de rattachement :
Université Paul Sabatier Toulouse 3 (principale)
INSA Toulouse
CNRS – MPPU
A partir du 01/01/09 :
Laboratoire National des Champs Magnétiques Intenses
LNCMI – UPR 3228
Etablissement de rattachement : CNRS – MPPU
Lié par convention à l’Université Paul Sabatier Toulouse 3, à l’Université Joseph Fourier Grenoble 1
et à l’INSA Toulouse
AERES
Campagne d’évaluation 2011 - 2014
L.N.C.M.P. BP 14245 - 143, avenue de Rangueil - 31432 Toulouse Cedex 4 - France
Tél. : (33) 5 62 17 28 60 ou (33) 5 62 17 29 85 - Fax : (33) 5 62 17 28 16 – -general@lncmp.org - http://www.lncmp.org

Table of contents
General overview 3
Overview of technical activities 7
Overview of scientific activities 15
Annex 1: Hygiene et securité 38
Annex 2: Formation 40
Annex 3: Enseignement, vulgarization, organization de colloques 41
Annex 4: Publication list 42
Annex 5: Organigramme 70
2

General overview
Short history
The Laboratoire National des Champs Magnétiques Pulsés (LNCMP UMR5147) was created on
1/1/2003 as a mixed research laboratory jointly operated and funded by the Centre National de la
Recherche Scientifique (CNRS), the Université Paul Sabatier (UPS) and the Institut National des
Sciences Appliquées (INSA) de Toulouse. Before that, it has existed as a mixed service unit, the
Service National des Champs Magnétiques Pulsés (SNCMP, UMS5642) which was housed on the
INSA campus until 2000, when it moved to a new building on the UPS campus, at the same time
upgrading its capacitor bank to 14 MJ. The LNCMP ceased to exist on 1/1/2009, as at that date, the
Laboratoire National des Champs Magnétiques Intenses (LNCMI, UPR3228) was created through the
merger of the Laboratoire des Champs Magnétiques Intenses (LCMI UPR5021 in Grenoble) and the
LNCMP, as part of the Très Grands Instruments de la Recherche (TGIR) of the CNRS.
Missions
The LNCMP has three major missions;
1) High quality research using high magnetic fields:
The scientists of the laboratory develop their own research in the main domains of solid state physics:
semiconductors, metals and superconductors or magnetism where the quantum effects are studied.
This 2005-2009 report presents the main developments of this research and of the technical
improvements underpinning them. Since the LNCMP scientists also work as local contacts for visiting
scientists, the number of topics studied at the LNCMP is necessarily large compared to the number of
scientists, which is a inherent aspect of the operation of any user facility.
2) Providing access to external users:
The laboratory is open to the international scientific community. Any scientist wanting to use high
pulsed magnetic fields can submit a project to use the relevant infrastructure of the laboratory with the
help of the general support group of the laboratory and of a local contact.
All projects, including the internal ones, to be realized in high magnetic fields are evaluated by an
international committee twice a year (June and December). Among around 70 projects submitted per
year, the rejection or reduction of demanded time is around 15%, the total number of submitted French
projects being around 30 (45 %).
3) Magnet development:
The laboratory has to develop and provide pulsed magnetic fields with the best possible performance
for high quality scientific experiments. This can be in terms of the field strength, but also in terms of
field homogeneity and stability, high repetition rate or by offering special magnet geometries. These
are in general conflicting requirements and the optimal choice depends on the experiments to be
performed. The developments in magnet technology allow us to remain competitive with facilities
abroad and open our activities to other scientific domains, like pulsed field NMR, and other disciplines
than physics.
Why high magnetic fields?
A magnetic field is a very powerful thermodynamic parameter to influence the state of any material
system. Consequently magnetic fields serve as an experimental tool in very diverse research areas like
condensed matter physics, molecular physics, chemistry and, with increasing importance, in biology.
The versatility and universality of magnetic fields as a research tool lies in their coupling to the charge
and spin of the particles that constitute the matter that surrounds us. Many magnetic field based
research techniques are standard and can be done with conventional commercially available magnets
and associated equipment (MRI-scanners, NMR and ESR spectrometers, conventional
superconducting magnets, etc.). On the other hand there are many cases where very high magnetic
fields, only available in a few specialized facilities, are essential and where the prospect of new
discoveries is often the greatest. This scientific motivation has always formed a strong drive to
develop techniques and installations to generate the highest possible magnetic fields and to perform
experiments with them. In recent surveys, both by the European Science Foundation (ESF, "The
Scientific Case for a European Laboratory for 100T Science", 1998) and by the USA National
3

Research Council (“Opportunities in High Magnetic Field Sciences”, COHMAG 2005), a compelling
case has been made for high magnetic fields as a research tool for a wide variety of research topics and
strong recommendations were made to stimulate high magnetic field large facilities.
Since then, the recent developments in high magnetic field science have only further emphasised the
importance and impact of high magnetic fields. The results obtained clearly illustrate the power,
versatility and necessity of high magnetic fields as a research tool.
National and international context
The generation of very high magnetic fields is a technological challenge and their exploitation requires
a high financial commitment. Therefore not many infrastructures exist where very high magnetic
fields can be generated and used for research. Over the last twenty years, financial limitations and the
complexity of such installations have resulted in a further concentration of these activities in less but
larger infrastructures, very often operated on a national scale. For generating continuous magnetic
fields in excess of 30 T, powered with 15+ MW power supplies, installations can be found in the USA
(Tallahassee), Japan (Tsukuba) and Europe (Grenoble and Nijmegen). Large pulsed field installations
based either on motor generators or large (> 5 MJ) capacitor banks are found in Los Alamos (USA),
Tokyo (Japan), and in Europe in Toulouse and in Dresden (created in 2006). As the most recent step in
this trend, in 2007 the Chinese government has created a 40 M€national high magnetic field facility,
consisting of a static field installation in Heifei and a pulsed field installation in Wuhan. Still the
clearest example of this trend is the creation of the National High Magnetic Field Laboratory
(NHMFL) in the USA, a three site organization that pioneers all aspects of high magnetic field
generation, and its use for scientific experiments.
The current LNCMP installation was designed in 1992, and completed in 2000. Despite the continuous
and gradual improvements that have been implemented since then, this installation is basically no
longer up to the current standards and major investments are needed to improve its safety and to
guarantee its international competitiveness in the future. To obtain the necessary investments, it is
necessary to increase the weight and impact of high magnetic fields within the context of the French
large facilities. Following the example of the NHMFL, it was therefore proposed to merge the LCMI
and LNCMP into one Laboratoire National des Champs Magnétiques Intenses (LNCMI, UPR3228),
on two sites. The new laboratory, with its increased size, scientific production and impact, and user
community, will become a more important factor among the French large facilities, and it can be
expected that through collaboration and synergy, the LNCMI will be more than just the sum of the
LCMI and LNCMP, again improving the position of high field science in France and in Europe.
The LNCMI is the coordinator of the FP7 European infrastructure activity ‘EuroMagNET2’
(www.euromagnet2.eu) (2009-2012) that coordinates the activities of all European high field facilities
(LNCMI, HLD Dresden, HFML Nijmegen). To further strengthen European collaboration, the
LNCMI has been advocating the creation of a distributed European Magnetic Field Laboratory,
uniting these four installations. This idea has been implemented through an ESRFI Roadmap Update
proposal that was accepted last December (www.emfl.eu) and that will be elaborated in a future FP7
design study.
4

Funding
The LNCMP annual budget comes mainly from the CNRS (80 %), the remainder from INSA (10%)
and UPS (10 %). During the last 5 years, the funds obtained from external sources, in particular from
the ANR and from the European Community have greatly increased, and currently present more than
50 % of the total budget of the laboratory.
Part of the new building and the 14 MJ capacitor bank were paid from funds obtained in the context of
the Contrat Plan Etat Region 2000-2006 (CPER, Midi Pyrénées). The current CPER (2007-2013)
foresees the funding of an extension of the building and an upgrade of the capacitor bank.
Summary of the technical activities at the LNCMP
The LNCMP develops in-house all technical aspects of the generation and the use of high pulsed
magnetic fields. These activities can be grouped into five different categories:
- Ultrastrong conductors
The maximum field strength of a pulsed magnet is limited by the mechanical properties of its
conductor and the surrounding mechanical support. The LNCMP has an extensive in-house program to
develop conductors for pulsed magnets that combine good mechanical strength (high field) with good
electrical conduction (long pulses). The two main approaches developed are stainless steel jacketed
copper conductors and nano-filamentary niobium copper composites. Both are examples of high level
materials science aimed at specific applications.
- High voltage capacitor banks
Pulsed magnets are most conveniently powered by high voltage, high energy and high power capacitor
banks. The LNCMP engineers and technicians not only assure the maintenance and improvement of
the main (home-built) 14 MJ capacitor bank, but they have also developed and constructed several
mobile capacitor banks that are being used to perform pulsed field experiment at other installations,
like the LULI in Palaiseau and the ILL and ESRF in Grenoble.
- Pulsed coil design and construction
In order to obtain the highest fields and the longest pulses, pulsed field coils are operated very close to
their destruction limit. The LNCMP engineers and technicians are strongly involved in pushing these
limits to higher values. Over the last four years, the maximum field generated at the LCNMP has
increased from 76 T to 82 T, and the foundations for further improvement have been laid. But the
usefulness of a pulsed magnet for experiments is not only determined by field strength or pulse
duration, but also by bore size, noise, homogeneity, cool down time, special geometries etc. and all
these aspects are being covered and improved. During the last four years, these activities were largely
developed in the context of a FP6 design study (DeNUF, www.denuf.org) and an ANR project.
- Cryogenics
Both the pulsed magnet and the user experiments operate in general under (independent) cryogenic
conditions. The large size of the magnets and the small size of the magnet bore impose non-standard
cryogenics, further complicated by the presence of a strong time-varying field that often prohibits the
use of metals as construction material. Proof of the strong performance of the cryogenics team is the
fact that the LNCMP is the only pulsed field facility that routinely operates a (home-built) dilution
refrigerator. The recent developments of the cryogenics for non standard coil configurations for optical
and scattering experiments are another example.
-Mechanics
All the above technical activities rely heavily on the presence at the LNCMP of a well equipped
mechanical workshop, with highly skilled technical personnel.
In order to go beyond the field limits imposed by the mechanical strength of current engineering
materials, the LNCMP has recently installed a 60 kV, 1 MA capacitor bank that powers single turn
coils (‘Megagauss’) This installation is based on controlled coil failure, but leaves the experiment
unharmed. Values above 300 T can be generated by such an approach albeit with very short pulse
durations, typically in the microsecond range.
More details of these technical activities can be found below, or in greater detail in the annual reports
(www.lncmp.org).
5

Summary of the scientific activities at the LNCMP
The scientific activities at the LNCMP cover a large area of condensed matter physics and go even
beyond that. Over the last four years, they have resulted in 170 journal papers (‘ACL’), of which 21
Physical Review Letters and 6 papers in Nature, Nature Physics and Science. In view of the small
number of scientists (9 equivalent full time permanent scientists in 2008), this is an excellent result,
proving the large added value of pulsed magnetic fields as a research tool and the high quality of the
LNCMP installation and researchers.
In the area of metals and superconductors, the first observation of quantum oscillations in high T c
superconductors was certainly a highlight, generally acclaimed by the international scientific
community. The study of quantum oscillations in organic conductors has allowed a better
understanding of their Fermi surface.
The activities in nanophysics are focused on (i) (magneto)-transport properties of individually
addressed carbon nanotubes and exfoliated graphene and graphene nano-ribbons, and (ii) NIR
magneto-optical properties of carbon nanotubes in solution and epitaxial graphene. The activity in the
domain of disordered systems consists mainly in the studies of the conduction mechanisms involved in
macroscopic samples which conserve its nanometric-scale properties, that is networks of nano-objects
obtained by self-organization on a surface.
The first results of X ray and neutron scattering in high pulsed magnetic fields are coming out, and the
LNCMP effort in this area is generally considered as pioneering. It allows the determination of
structural and magnetic phases in high magnetic fields that cannot be addressed by any other means.
Pulsed magnetic fields also find applications outside condensed matter physics. The LNCMP is
pioneering its use in experiments testing quantum electrodynamics. A setup to measure the long
predicted magnetic birefringence of the quantum vacuum is under construction, and experiments on
axion generation have allowed to push the existence limits of such particles to new values.
The activity in the semiconductor domain covers essentially three different aspects: one is focussed on
the electronic bandstructure of semiconductors, mainly low dimensional systems, through the
investigation of high magnetic field quantum effects on transport and spectroscopy in the VIS-FIR
range, a second research axis is devoted to the study of the correlations in strongly interacting 2D
electron systems and the third one concerns the properties of magnetic semiconductors.
All of the scientific activities outlined above are supported by the general support group, in terms of
optics, electronics, sample preparation etc. This group also strongly contributes to the development of
new experimental techniques for pulsed field measurements, examples of which are contact less
resistance measurements by means of a tunnel diode oscillator and pulsed magnetic field NMR.
More details on these activities can be found below, or in even greater detail in the LNCMP annual
reports (www.lncmp.org).
Summary of the other activities at the LNCMP
On average, the LNCMP hosts around 7 PhD or master students plus several stagiaires from
engineering schools. Several members of the LNCMP staff teach at INSA Toulouse, UPS and ISAE.
Several national and international meetings have been organized by the LNCMP during the last four
years; a list can be found below.
The installation of the LCMI has some inherent risks, which in combination with the intrinsic presence
of inexperienced external users, makes it important to pay special attention to security issues. The
activities of the security officer (‘ACMO’) of the LNCMP to reduce the risks as much as possible are
detailed below.
This report is organized as follows: A short account of all the technical and scientific activities is
given below. The annexes 1-5 give details on security, training, popularization, the publication list
2005-2009 and the organizational chart..
Toulouse July 16 th 2009 G. Rikken
6

Personnel involved:
High Field Installation
Permanent: Julien Billette (coils), Paul Frings (coils&generator), Franck Giguel (50% :coils), Bertrand Griffe
(generator)
Non permanent: Jérome Béard (coils), Julien Mauchain (X-coils)
Collaboration: mainly within DENUF: H.Jones, Oxford University; J.Perenboom, Universiteit Nijmegen; T.
Hermannsdorfer, Hochfeldlabor Dresden;
High Field Coils
Coils to generate high magnetic fields are subjected to enormous Lorentz forces that have a tendency to explode
the coil. To contain these forces one can use stronger conductors or add internal (non-conducting, or a least not
current carrying) reinforcement. These measures cause however higher losses and thus a more rapid rise of the
temperature limiting the pulse duration. Optimized coil design for pulsed coils is therefore always a compromise
between conductivity and mechanical strength.
copper stainless steel coils
The most evident, and in theory also the most efficient, way to contain the forces in a coil is to have wire of
sufficient strength. The development of copper wire with a heavily cold-worked stainless steel jacket (UTS of
the total wire ~1000MPa) permits in principle to wind straight forward coils with such a wire that can achieve
fields in excess of 60 T. However these coils showed short lifetimes, with a tendency of the lifetime to decrease
with coil volume. We believe that this is due to insulation problems caused by high pressures inside the coil.
This problem is probably the combination of a chemically inert stainless steel surface (difficult to adhere to) and
the hardness of the surface. This combination is believed to promote “puncture” of the isolation at high contact
forces. So for the time being the production of this type of coils is stopped.
distributed reinforcement coils
A flexible way to handle the balance between strength and conductivity is to reinforce every layer of the coil by
the minimum required thickness of reinforcement. This reinforcement can easily cope with the hoop-stress but
the axial load is difficult to transfer into the external reinforcement, and this is one of the factors (the other is the
problem of plastic backflow) that limits the highest field that can be generated in such a way in a reliable manner.
copper zylon
This techniques was first tested with the combination of a ductile (and highly conductive) copper wire. After
solving some minor technical problems (for instance the transition of one layer to the next), these coils turned
out to be a reliable source for user fiels up to 60 T. The inclusion of thermally not well conducting fibers caused
unfortunately long cool-down times.
glidcop zylon
In order to pass the 60 T frontier for reliable user fields a stronger, but still ductile, conductor has to be used. By
choosing glidcop we recently managed to generate 70 T user fields. The first coil has been tested elsewhere and
is waiting to be installed in one of the specially adapted cells.
stainless zylon
To show the potential of this technique, we also produced a coil consisting of copper-stainless steel wire. With
this combination of strong, but not so ductile wire, and zylon reinforcement a field of more than 79 T was
realized, in agreement with the calculations. Due to the limitations of our generator these tests had to be
performed at the NHMFL in Los Alamos (US). This approach can at this moment not be fully exploited in
Toulouse due to the limitations of our generators. A project for an adapted generator is now underway.
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apid cooling coils
The distributed reinforcement coils have very low radial stresses. Therefore annular cooling channels can easily
be integrated. By adding 1 cooling channel the cooldown time is decreased with a factor of 3.5 A simplified
analysis, based on infinitely long coils and infinite heat of evaporation of the liquid nitrogen, gives a gain equal
to (n+1)², n is the number of channels. The development of rapid-cooling coils has greatly enhanced the
efficiency and ease of use for our users.
multi-coils
One way to obtain higher fields with existing materials is to build a set of nested coils that are energised
consecutively. The increase in the number of free parameters for the coil design logically leads to coils with
improved performance and permits moreover to use special wires that are only available in limited quantities or
with limited sections. The drawback of this approach is however a more complicated system that is less easy to
use since the field pulse has two (or more) largely different rise-times. This approach was tested and
implemented with EU funding and permitted to generate fields above 75 T.
single-turn coils
The limit for the field that can be generated with the currently available engineering materials seems to be
around 100 T. To go beyond this limit, one has to accept that the coil is destroyed during the pulse. By using a
very fast (rise time sub microsecond) and high current (> 1 MA) generator, in combination with single turn coils,
one can generate fields up to 300 T, without destroying the experiment inside the coil (which of course is
destroyed). An installation of this type has been installed at the LNCMP and is currently under test.
special geometry coils
Sometimes an experiment needs a magnet where, contrary to the standard solenoids with a cylindrical axial hole,
the field is not parallel to the access. Examples are diffraction on magnetic systems and experiments involving
polarised radiation. The request for such type of coils was greatly enhanced by the construction of a
transportable generator that permits the production of pulsed high magnetic fields at other large installations like
high power lasers, neutron sources and synchrotrons (we performed experiments at the ERSF, LULI and ILL).
wide angle access
The first special coil for X-ray scattering increased the accessible scattering angles to ±30 degrees. The idea of
for this coil was to obtain a conical bore by removing the wires close to the bore but far from the centre that are
not very efficient anyhow. This resulted in a > 30 T coil that has at the moment produced more then 10000
pulses and is still in operation.
split coil
In order to have a full circle of diffraction angles accessible and to have at the same time the magnetic field
perpendicular to the scattering vector a split coil for fields of over 30 T has been constructed and tested.
X-coils
In order to optimise the product B²l (where B is the component of the magnetic field perpendicular to the path l)
for birefringence experiments, a set of two slightly tilted racetrack coils has been developed. The first X-coils
produced B²l values of 25 T²m. Improved versions are under test that will surpass 150 T²m
Generator
To energise pulsed field coils one needs a lot of energy (several MJ) in a short time (~50 ms or less). Such
powers can not easily be obtained from the electrical grid. The well known solution to this is intermediate
stockage in a high-voltage capacitor bank.
14 MJ generator and two 0.17 MJ small generators
The main generator of the laboratory is a 14 MJ, 65 kA, 24 kV generator. This generator exists since ten years. It
was built with an analogue control system. This analogue control proved to cause a lot of problems and
moreover the company that produced the system disappeared. The overcome this problem and make the
generator more reliable it was decided to replace the analogue control by a digital one realised by a series of
distributed PLC’s (programmable controllers). After this major intervention the generator now works very
reliable and has a more flexible interface for the users. Moreover, since all the control is programmed in software
it can easily be adapted to new requirements. Recently we implemented a complete logging and access-control
system. This is required by the EU funding for the visitor programme and allows at the same time to store
8

detailed information on coil behaviour and lifetime. Another technical improvement was the introduction of
“home built” pneumatic switches. In a first time they replaced the (quite expensive) electro-mechanical relays
for connecting the resistance measurement system. A much bigger version has now been developed to change
the polarity of a complete generator.
In addition we have two 0.17 MJ small generators that are used for testing smaller coils or to energise multi-coil
systems.
0.15 MJ transportable generator
The 0.15 MJ transportable generator showed its versatility and its reliability in various experiments at other large
installations. To make the setup of this generator more user-friendly (the first version needed a qualified
technician to assemble the units after transport) this generator has been equipped with special high-voltage, highpower
connectors and it can now be installed by a trained scientist without opening the generator modules.
1 MJ transportable generator
The success of the 0.15 MJ unit motivated us to build a 1 MJ transportable generator. This generator is equipped
with an automatic system for polarity control that permits to change the direction of the magnetic field pulse.
This is important for magneto-galvanic measurements and experiments using circular polarised X-rays. The
generator was completely designed, built and tested in the laboratory, and is now in operation.
6 MJ transportable generator project
In order to produce field above 60 T one needs, due to the increased current density, shorter pulses than the
actual 14 MJ generator can deliver. It was decided to build or acquire a 6 MJ generator with a shorter rise time.
Design studies have been finished and a call for tender is expected to be announced soon.
“Megagauss” generator
The generator for the destructive single turn installation (‘Megagauss’) has to be very fast and be able to supply
a very large current. The assembly at the LNCMP of a 200 kJ, 60 kV, 2 MA, 0,5 µs rise time generator was
recently successfully completed. It is located inside a Faraday cage for safety reasons and to limit the
perturbation of other measurements in the building.
Summary & Outlook: coils
The standard (rapid-cooling, zylon reinforced 60 T coils) are performing well and have a typical lifetime of 500
pulses at maximum field. The production of these coils has been standardised and takes less than 3 weeks (1
week production of parts on a computerised machine, < 1 week coil winding,

einforcement only reinforces in tangential direction, it does not reduces the axial stress in the wire). Such axial
reinforcement would be most likely metallic and could as such introduce extra insulation problems, but it is
worth to be tried.
higher fields for users
Higher fields for users make onlysense if a reasonable lifetime (>100 pulses at maximum field) can be obtained.
This is not only for reasons of coil efficiency but also because coil failures can damage the cryostat, data
acquisition equipment and the sample. A good way to increase the lifetime is to downgrade the actual user field
to 90% of the maximum field. This reduces the stresses by 20%. Moreover it turned out that every modification
of a coil design, although beneficial in the long term, normally reduces the lifetime of the first few coils that are
produced in that way. This means that modifications have to be performed in a prudent and systematic way and
preferentially tested on small coils.
rapid cooling and “high duty cycle” coils”
It is quite likely that a lot of gain (10-50 times) can be obtained in rapid cooling techniques, either by optimising
the existing technique or by using coil-construction techniques used for DC coils but now with liquid nitrogen
cooling. This latter approach sounds very interesting and could be very fruitful since the laboratory has merged
with the laboratory for DC fields in Grenoble. A minor concern might be the impedance of these coils since they
are normally designed for voltages much lower than 24 kV. But we believe that this problem can be solved.
Summary & Outlook: generator
The generators are working fine and do not need a lot of modification or maintenance. In theory the idea of
replacing the current limiting self-inductances by non-linear resistors (high-T c current limiters) seems interesting
and efficient (more energy available, less rise-time limitations), but this technique is not very mature and still
expensive, so it might be better to postpone its implementation for a few years.
14 MJ generator
The generator is now very stable and reliable. The aspects that could be improved, and should be if the number
of users increases, is the duration of the charging and specially the duration of commutation between the boxes
and the time it needs to change the polarity. This modification can be realised by installing pneumatic switches
and at the same time reducing the number of thyristor stacks and replacing them by optical thyristors.
Safety should always stay a major issue, and with the installation of more independent generators the interlock
and grounding should be redesigned.
6 MJ transportable generator
Within two years this generator should become available, either (preferred) by acquiring a turnkey solution or by
building the generator in house. This will greatly facilitate the test of medium size monolithic coils in the fieldrange
from 70 to 90 T and the operation of a dual coil system.
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Personnel involved:
Materials Science
Permanent: F. Lecouturier, N. Ferreira, L. Bendichou, J.P. Laurent, J.M. Lagarrigue, J. Billette
Ph.D Student: V.Vidal, J.B. Dubois
Non permanent: M. Mainson (CDD)
Collaboration: L. Thilly & P.O Renault (PHYMAT, Poitiers), V. Vidal (MTM-Leuven, ENSTIMAC-Albi),
H. van Swygenhoven & S. van Petegem (POLDI-Paul Scherrer Institut, Switzerland),
B. Schmitt (SLS-PSI, Switzerland), P. Olier (CEA-LTMEX, Saclay), A. Devred & C. Berriaud
(CEA-SACM, Saclay), H. Jones (Clarendon Laboratory, University of Oxford), S. Svyagin
(HLD, Dresden), C. Verwaerde (MSA-Alstom), M. Sandim (University of São Paulo, Brazil)
Ultra-high strength nanocomposite Cu/X (X=Nb, Ta) conductors
The development of reinforced conductors, with high electrical conductivity and high strength, is essential to
provide non-destructive high pulsed magnetic fields over 80 Tesla: a compromise is obtained with Cu-based
continuous nanofilamentary wires (2 GPa ultimate tensile strength and 0.6 µohm.cm electrical resistivity at 77K).
The fabrication process of these nanocomposite wires is based on severe plastic deformation applied by
accumulative drawing and bundling (ADB), leading to a multi-scale copper matrix containing up to N=85 5 (4.4
10 9 ) continuous and parallel niobium fibers. Three ways of optimization have been investigated and are
summarized below: they deal with the geometry of the reinforcement, the material and the process.
Cu nanowhiskers embedded in Nb nanotubes inside a multiscale Cu matrix: the way to reach
extreme mechanical properties in high strength conductors
Finally, the validity of the Cu/Nb/Cu
nanocomposite wires (N=853 , �1mm), insulated
with Kevlar fiber), without any loss in strength, has
been demonstrated in the thumb-coils configuration
(Ph.D work of S. Batut). First neutrons diffractions
experiments on Cu/Nb/Cu aged coils have been
performed at the continuous spallation neutron
source SINQ (POLDI, PSI, Switzerland).
For the development of non destructive resistive
pulsed magnets over 80T, Cu/Nb/Cu wires with
geometrical optimization, composed of a multiscale
Cu matrix embedding Nb nanotubes were
produced by ADB. TEM reveals good codeformation
compatibility between the reinforcing
Nb nanotubes and the multi-scale Cu. While a sharp
single-component fibre texture is developed
in Nb nanotubes, a double texture with and
orientations is observed in the copper matrix.
The mechanical properties are improved compared
to nanofilamentary Cu/Nb wires. The extraordinary
strengthening of the co-cylindrical structure is
related to: (i) an increase of Cu-Nb interfaces
surface acting as dislocations barriers; (ii) a rapid
and controlled access to nanometre scale where size
effect operates on the plasticity mechanisms; (iii)
the contribution of an additional reinforcing phase:
the Cu-f nanofilaments embedded in the Nb
nanotubes behave as whiskers with strong size
dependence. The Cu/Nb/Cu system is therefore
more efficient than the Cu/Nb system for the highstrength
applications in magnets: it exhibits a
controlled microstructure and an efficient
strengthening in the nanocomposite zones, where
size and also geometry play major roles (Scripta
Mat 57 (3) (2007) 245-248).
11
(a), (b), (c) SEM image of the multi-scale structure of Cu/Nb/Cu
co-cylindrical wires (N = 85 3 , d=1.511mm). (d) High-magnification
cross-section SEM image of the nanocomposite area showing
the Nb nanotubes, the Cu fibers and the interfilamentary Cu.

Development of a new co-axial CuNbCuNb nanocomposite wires
A new nanocomposite structure has been designed with a superposition of Nb and Cu nanotubes. We have added
nanometric phases reminding the extraordinary strengthening of the co-cylindrical structure. A conductor
containing 85 3 Nb nanowhiskers, Cu nanotubes and Nb nanotubes, embedded in a copper matrix has been
obtained. The Cu/Nb/Cu/Nb system is therefore more efficient than the Cu/Nb filamentary and the Cu/Nb/Cu cocylindrical
system for high-strength applications in magnets: it exhibits a controlled microstructure and an
efficient strengthening in the nanocomposite zones.
12
UTS(MPa)
1250
1200
1150
1100
1050
1000
950
900
850
800
750
700
Prototypes LNCMP - LMP- CEA 85 3
CuNbCu UTS(RT)
CuNbCuNb UTS(RT)
CuNbCu UTS(77K)
CuNbCuNb UTS(77K)
0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2
diamètre conducteur (mm)
Bulk precursors N=85 3 ,after drawing UTS of co-axial CuNbCuNb and co-cylindrical
CuNbCu nanocomposite wires versus diameter
Effects of size and geometry on the plasticity of copper/tantalum wires
The material optimization procedure led to the use
of tantalum to strengthen the copper matrix, instead
of Nb because of the highest value of its shear
modulus which is assumed to increase the whiskers
effect. The microstructure of the Cu/Ta
nanofilamentary conductors (N=85 3 ), cold-drawn to
a diameter of 1.5mm, has been investigated and
correlated to the mechanical properties. After heavy
drawing, the Cu matrix is nanostructured and the Ta
nanofilaments develop a strong ribbon-like shape
resulting in an early microstructural refinement.
The macroscopic strength is in excess from rule of
mixtures predictions as confirmed by nanohardness
values. The strengthening is however
lower as expected (UTSRT=711MPa), because of
the distorted ribbon morphology of the Ta fibers
preventing them from behaving as nanowhiskers,
like Nb fibers in Cu/Nb wires. This result shows
that size and geometry play key roles in the
plasticity of nanomaterials (Acta Mat 54 (4) (2006)
1063-1075).
(a), (b), (c) SEM image of the multi-scale structure of Cu/Ta
nanofilamentary wires (N = 85 3 , h=3.35mm).
(d) High-magnification of the curled Ta fibers
Bright-field TEM images of transverse section of Cu/Ta (N=85 3 ,
d=1.293 mm) after heavy drawing: ribbon-like shape of Ta fibers
Prevention of fracture during Accumulative Drawing and Bundling (ADB) process
The third way to improve the properties of Cu/X wires is to optimize the processing parameters. The colddrawing
of the Cu/Nb/Cu co-cylindrical conductors, reinforced by niobium nanotubes filled with copper
nanowhiskers, has been improved with respect to the elimination of the central bursting defects following the
conditions of the criterion of Avitzur and led to the obtention of more then 20 meters of conductors without
fracture. Several attempts have been performed to insulate these conductors without loosing their strength with
different kind of materials and different ways of application (heat-retractable PTFE sheath, PTFE in spray,
Kevlar fiber…).
More details on the three ways of optimization of the Cu/X nanofilamentary can be found in the Ph.D thesis of
Vanessa Vidal (“Optimisation des propriétés mécaniques des conducteurs nanofilamentaires Cu/X (X= Nb ou
Ta) par l’étude des mécanismes élémentaires de déformation“, Ph.D Thesis, INSA Toulouse, n°855, 2006)

Size and strain effects on the magnetic properties of heavily-drawn Cu-Nb (N=85 5 ) wires
We have studied the influence of strain applied via
ADB on the superconducting properties for a serie
of Cu-3.5%Nb nanocomposite wires, containing
85 5 Nb fibers with diameter below 10nm,
embedded in a Cu matrix, with interfilamentary
spacing below 2nm. The increasing strain leads to
only minor modifications of the superconducting Tc.
Also, no major differences regarding the Hc2 data
were observed among the investigated conductors.
However, the main difference is the shape of the
DC magnetization curves. Notably, the investigated
samples exhibit a double-peak structure in the
ascending branch of the magnetization curves. The
first peak, which occurs at low magnetic fields, is
related to the superconducting proximity effects in
the Cu matrix and is enhanced as the
interfilamentary spacing d Cu-0 decreases, as
expected. In an opposite manner, the second peak is
almost suppressed as the dimension of Nb filaments
d Nb decreases, a fact suggesting that the second
peak is related mainly to the size of the Nb
filaments (Superconducting Science & Technology
19 (2006) 1233-1239).
13
DC magnetization curves for the Cu-3.5%Nb nanocomposite
wire: ascending branches of M(H) curves for T = 3 K. The inset
shows details of the curves for low magnetic fields.
Evidence of internal Bauschinger test in Cu/Nb/Cu nanocomposite wires during in-situ macroscopic
tensile cycling under synchrotron beam
In-situ multiple tensile load-unload cycles under synchrotron radiation have been performed at SLS (PSI) on
nanocomposite Cu/Nb/Cu wires. The phase specific lattice strains and peak widths demonstrate the dynamics of
the load-sharing mechanism where the fine Cu channels and the Nb nanotubes store elastic energy, leading to a
continuous build-up of internal stress. The in-situ technique allows revealing the details of the macroscopically
observed Bauschinger effect (APL 90, 241907 (2007)). The nature of the elasto-plastic transition is uncovered
by the “tangent modulus” analysis and correlated to the microstructure of the Cu channels and the Nb
nanotubes. Finally, a new criterion for the determination of the macroyield stress is given at the stress to which
the macroscopic work hardening, � a = d� a/d� 0, becomes smaller than one third of the macroscopic elastic
modulus (Acta Mat 57 (2009) 3157-3169).
Outlook
The improvement of the drawing conditions led us to apply the same procedure for the optimization of the
extrusion conditions. The aim is the prevention of fractures during the extrusion step of the ADB process and the
scale-up of the size of the nanocomposite billets. In collaboration with PHYMAT (L. Thilly), two CEA
Laboratories (DAPNIA, LTMEX), and an industrial partner (Alstom/MSA), and funded by the ANR, we are
joining forces, through the NANOFILMAG project, to master the parameters and processes of preparation and
transformation of copper/niobium-based nanocomposite conductors. A Ph.D student, J.B Dubois, is involved in
the project since October 2007 and shares his activity between LNCMI and PHYMAT.
Development of high strength macrocomposite copper/stainless steel (Cu/SS) conductors
- for 60T–1MJ and 3MJ magnets with optimized current distribution: 900 meters of Cu/SS macrocomposite
conductors with two different SS contents (40, 58%vol) and with different cross sections (2.00 * 3.15,
2.50 * 3.55 mm 2 ) were produced and checked the requirements for a 65T-1MJ prototype magnet with optimized
current distribution. 600 meters of Cu/SS macrocomposite conductors with three different SS contents (42, 46,
58 %vol) and with different cross sections (2.36 * 4.50, 2.65 * 4.50, 3.00 * 5.00 mm 2 ) have been especially
produced in order to be wound in a “large bore” 65T-3MJ prototype magnet with optimized current distribution.
- for 80 T magnet with optimized reinforcement distribution: the development of 450 meters of Cu/SS
macrocomposite wires with 40% of SS and a cross section of 2.36 * 4.00 mm 2 has been dedicated to the
construction of a new type of magnet combining high strength wires and Zylon fibers, producing a new european
record, in 2006, with a magnetic field of 78 T, powered by the capacitor bank of NHMFL (Los-Alamos-USA).

- for B > 80 T in the coilin/coilex system: the development of Cu/SS wires, for the coilin, with 60% of SS
(UTS>1550 MPa) and a cross section of 2.00*1.25 mm 2 allows to reach 81T (the LNCMI record) in spring 2009.
- for coil aging study within DENUF project (FP6): the study of the influence of the work-hardening on
Cu/SS macrocomposite wires has been performed in order to determine the best compromise between strength
and plastic strain with respect to the coil lifetime. Several small batches (50 meters) with different workhardening
ratio (RA= 65, 70, 75%, 80%) have been elaborated in-house and insulated by an industrial company
with a double layer of polyimide films (Kapton).
Research & Development of high strength composite conductors
- Cu alloys for magnets with optimized current distribution: conductors made of Cu alloys like GlidCop
(CuAl2O3) or CuAg (with low silver content 0.08%) have been provided by industrial companies in order to be
combined with Zylon fibers in magnet with optimized reinforcement distribution.
- CuNbTi microcomposite wires for conventional magnets and split-coil:
A strong link has been developed with the industrial company MSA in order to adapt commercially available
“raw materials” to the specifications of high pulsed field magnets. CuNbTi wires have been provided by MSA.
First, a selection of round samples from LHC production has been characterized in liquid nitrogen at LNCMP.
The good level of mechanical properties (UTS>1GPa at 77K) promotes them as potential candidates for pulsed
magnets. Rectangular cross sections of 2.00mm * 3.15mm have been transformed.
Coil aging studies on CuSS and CuNbTi minicoils
In the framework of the European project DeNUF, “new” conductors and “new” insulators have been
systematically aged using the mini-coil aging platform. During the period 2005-2009, we have performed aging
experiments on CuSS (LNCMP), CuNbTi (MSA) mini-coils and also on in-situ CuNb wires provided by HLD
(Dresden) and Bochvar Institute (Moscow).
Mini-coils wound with CuSS and CuNbTi have been tested in order to compare their aging performances. We
have also compared two materials for insulation: polyester fibers and Kapton ribbons. Moreover, wet winding
impregnation (LNCMP) and vacuum impregnation, performed in the Clarendon Laboratory (University of
Oxford), were applied to the polyester insulated mini-coils.
Three CuNbTi coils, wet wound with polyester fiber braiding insulation, have shown electrical damages after
winding. We observe an improvement by applying vacuum impregnation but the two coils have been damaged at
low fields (4.7 and 13.8 T) due to an electrical failure. Two others coils insulated with Kapton ribbons have been
successfully tested until a maximum field of 36.5 T and aged at 33.8 T (92%Bmax). The insulation method
which is suitable to the obtention of high magnetic field is the Kapton insulation.
The electrical resistance monitoring data, for the CuNbTi wires insulated with Kapton, are compared to the ones
of the CuSS wires. Bmax for the CuNbTi coils is comparable to the CuSS coils near 36 T. The increase of
electrical resistance before the coil failure is much more important for CuNbTi (+15%) than CuSS (+5%). We
can link this difference to the fact that the Cu matrix embedding NbTi filaments is free to deform whereas in
CuSS wires, the deformation of the copper core is constrained by the stainless steel jacket. The same behaviour
is observed during aging.
Nevertheless during aging after 60 shots at 92%Bmax, the resistance of the CuNbTi coil suddenly increases by
8%. The total resistance variation reaches 25% after 60 shots. The plastic aging of the CuNbTi coils seems to be
more rapid than the plastic aging of CuSS coils , where �R= 9% after 100 shots (or even more) at 90%B max.
The CuNbTi conductors are well adapted to generate high magnetic field, but their aging performances at high
field are weaker than the CuSS conductors.
Mini-coil wound with polyester insulated CuNbTi
14

Personnel involved:
Strongly correlated electron systems
Permanents: A. Audouard (CR1), W. Knafo (CR2), M. Nardone (IR), C. Proust (CR1), D. Vignolles (MC), A.
Zitouni (AI)
Non permanents: C. Jaudet (PhD), J. Levallois (PhD), B. Vignolle (Postdoc)
Collaborations: K. Behnia (ESPCI, Paris)
D. Bonn (University of British-Columbia, Canada)
J. Flouquet, D. Aoki (CEA, Grenoble)
N. Husseyand T. Carrington (University of Bristol, UK)
L. Taillefer (Université de Sherbrooke, Canada)
Fermi surface of high temperature superconductors
A useful way to characterize the electronic properties of a metal is to map out their Fermi surface (FS).
It can be done by measuring quantum oscillations in high magnetic field, either of the magnetoresistance
(Shubnikov-de Haas –SdH- effect), or of the magnetization (de Haas-van Alphen –dHvA- effect) [1]. Other
probes such as AMRO (angular dependence of the magnetoresistance) and ARPES (angle resolved
photoemission spectroscopy) can also be used
in such way.
R � (�)
�(u.a.)
0.15
0.10
0.05
0.00
0.0
-0.1
-0.2
�R (m�)
0.5
0.0
-0.5
1.65 1.70 1.75
��(u.a.)
2
0
-2
100 / B (T -1 )
1.7 1.8
100 / B (T -1 )
T = 0.7 �0.2 K
0 20 40 60
B (T)
T=2.8 K
(a)
(b)
15
In most metals, predictions of band
structure calculations (LDA) are in good
agreement with experimental measurements.
This is also the case in the overdoped side of
the phase diagram of high temperature
superconductors (HTSC) where we have
recently reported quantum oscillations in
overdoped Tl2Ba2CuO6+� confirming that the
FS consists of a large cylinder [2]. Fig. 1
shows interlayer resistance (top) and magnetic
torque (bottom) with the field oriented close to
the c-axis for two different Tl2201 crystals at
temperatures below their zero-field
superconducting transitions. For both sets of
data, the inset shows an expanded view near
the field maxima, which reveals clear
oscillations whose amplitude grows with
increasing field strength. The frequency F of
the oscillations is directly related to the
extremal cross-sectional area A of the Fermi
surface normal to the field. A Fourier
transform of the data displays a single
frequency of 18100 T, which corresponds to
Fig 1 : Raw data of interlayer magnetoresistance
an area covering
(top) and
65
torque
% of
(bottom)
the first
versus
Brillouin
magnetic
zone and
field.
a
The
doping level p=0.3, in good agreement with band
structure calculations.
insets show
These
a magnified
results
view
are also
of the
in
oscillatory
perfect agreement with AMRO [3], and ARPES [4]
measurements.
component of each quantity [2].
By contrast, the underdoped regime is highly anomalous and appears to have no coherent Fermi surface,
but only disconnected ‘Fermi arcs’ [5], whose origin would be in the high orbit predicted by the LDA
calculations, with a pseudogap open around (O, �) et (�, 0). In this context, the observation of quantum
oscillations in underdoped YBa2Cu3O y has created a lot of excitation in the community since it infers a more
classical view based on a Fermi liquid picture.

- R xy (�)
0.06 1.5 K
2 K
2.5 K
3 K
3.5 K
4.2 K
0.04
0.02
0.00
30 40 50
B (T)
60
Fig. 2 : Hall resistance as a function of magnetic
field B for YBa2Cu3O6.5, at different temperatures
between 1.5 and 4.2 K [5]
16
Thanks to the synthesis of high quality
single crystals by the group of D. Bonn and
the improvement in the signal/noise ratio
measurement under pulsed magnetic field,
we have reported quantum oscillations of the
Hall resistance of the oxygen-ordered copper
oxide YBa 2Cu 3O 6.5 [6]. With a T c of 57.5 K,
these samples have a hole doping per planar
copper atom of p=0.10, corresponding to the
underdoped region of the phase diagram. Fig.
1 shows the magnetic field dependence of
the Hall resistance at different temperatures
between 1.5 K and 4.2K, where clear
oscillations of the resistance are observed
beyond the superconducting transition. The
oscillation frequency of 530 T implies a
Fermi surface pocket that encloses a k-space
area which represents only 1.9 % of the
Brillouin zone. The low oscillation
frequency reveals a Fermi surface made of
small pockets, in contrast to the large
cylinder characteristic of the overdoped
regime. dHvA oscillations have been
observed at the same doping level [7, 8]. In
addition, quantum oscillations have also
been observed in the stoechiometric compound YBa2Cu4O8 (Tc=80 K corresponding to a doping p=0.14) with a
similar frequency F=660 T [9]. The sharp contrast between the sizes of the FS on opposite sides of the phase
diagram is illustrated in Fig. 3. The main panel displays the Fourier transform of QO of underdoped
YBa 2Cu 3O 6.51 (red) and of overdoped Tl2201 (purple).
Fig. 3 : Fourier transform of the oscillatory part of
the torque for underdoped YBa2Cu3O6.51 (red) and for
overdoped Tl2201 (purple). Insert: Sketch of the FS
area deduced from the frequencies of quantum
oscillations via the Onsager relation.
[10].
The inset shows the area of the
corresponding orbit in the FBZ. It is
worth noting that quantum oscillations
tell us neither the number of pockets,
nor their location in the reciprocal
space. This drastic dissimilarity of FS
topology simply reflects the difference
in carrier density on opposite sides of
the phase diagram. While the large
cylinder in the overdoped side
corresponds to a carrier density of 1 +
p, as predicted by band structure
calculations, the band picture fails in
the underdoped side, where the carrier
number scales more closely with p.
One fundamental question for our
understanding of HTSC is what causes
the dramatic change in FS topology
from overdoped to underdoped
regimes? Based on the observation of a
negative Hall effect at low temperature
in underdoped YBCO, the presence of
an electron pocket in the Fermi surface
has been suggested would naturally
arise from a reconstruction of the large
hole FS calculated from band structure

Fourier amplitude (arbit. units)
1.0
0.5
Different mechanisms have been proposed for this FS reconstruction, involving d-DW order [11],
incommensurate antiferromagnetic
data
F1
F2
F3
oscillatory torque (a.u.)
1
0
-1
T=0.7 �0.2 K
y=6.54
y=6.51
30 40
B (T)
50 60
0.0
0 500 1000 1500 2000 2500
F (T)
Fig 4 : Fourier analysis of the oscillatory torque (see
inset) for underdoped YBa2Cu3O6.54.
17
order [8] or stripe order [12]. Each
scenario predicts a different FS
topology and the observation of an
additional frequency would provide
a stringent test. In particular, recent
dHvA measurements in the same
compound than the present work
found evidence of a larger pocket
which impose strong constraint on
the ordering wave vector for the
reconstruction [8].
In order to determine whether there
are other closed FS, which is of
fundamental importance to clarify
the FS of HTSC in the pseudogap
phase, we have performed highprecision
measurements of the
dHvA effect in underdoped
YBa2Cu3Oy [13]. Raw data of torque
for two slightly different
compositions (y=6.51 and y=6.54)
are shown in the inset of Fig. 4.
Solid lines are fits of the Lifshitz-Kosevich theory, assuming that four frequencies are involved in the data. The
main figure presents the Fourier analysis of the oscillatory torque for underdoped YBa 2Cu 3O 6.54. A broad peak
with a maximum around 535 T is observed, in agreement with previous results. Our results do not support the
existence of a larger pocket reported recently in the same compound [8]. The main frequency, so far believed to
be a single frequency, is in fact composed of three closely spaced frequencies: F1=540 T (black line in Fig. 4)
and two satellites F 2=450 T (green line) and F 3=630 T (purple line). We attribute these frequencies to bilayer
effect and corrugation of the FS, which point out for the first time in an underdoped cuprate the coherence of the
quasiparticle along the interplane direction at low temperature.
Heavy-fermion systems
Activity on heavy-fermion physics was developed during the last years at the LNCMI-Toulouse. Among recent
works, two studies performed at the LNCMI-Toulouse on the “hidden-ordered” paramagnet URu 2Si 2 and on the
antiferromagnet CeRh 2Si 2 are summarized below.
Fig 5 : Nernst signal in URu 2Si 2 at different temperatures. The
inset compares the phase diagram (T,B) obtained from the MR
(square) and Nernst effect (triangles) studies in pulsed fields
with steady field measurements of the MR (circles).
Transport properties of the heavy-fermion
URu 2Si2 have been studied in pulsed
magnetic fields [14]. Combination of
magnetoresistance, Hall effect and Nernst
effect measurements (see Fig. 5) permitted to
outline the reconstruction of the Fermi
surface in the magnetic field-temperature
phase diagram. The zero-field ground state
(called ‘hidden order state’) is a compensated
heavy-electron semi-metal, which is
destroyed by magnetic fields through a
cascade of field-induced transitions. A large
Nernst signal emerges in the hidden order
state. A finite Nernst signal is indeed
expected in a multi-band metal with different
types of carriers. In addition, as illustrated by
the case of elemental bismuth, the Nernst
effect, which tracks the ratio of mobility to
the Fermi energy, becomes particularly large
in a clean semimetal. This signal was found
to be suppressed above 35 T, when the
magnetic field destabilizes the hidden order.

Above 40 T, URu 2Si 2 appears to be a polarized heavy-fermion metal with a large density of carriers, whose
effective mass rapidly decreases with increasing magnetic polarization.
Fig 6 : Magnetoresistance of CeRh2Si2 in pulsed
magnetic fields up to 50 T at different
temperatures.
18
CeRh 2Si 2 is a heavy-fermion compound
characterized by two successive transitions, at
T N,1 = 36 K and T N,2 = 26 K, towards
antiferromagnetic order [15]. Application of
hydrostatic pressure induces a quantum phase
transition to a paramagnetic Fermi liquid regime,
in the vicinity of which an unconventional
superconducting pocket develops [16]. Recently,
we have studied the effects of high magnetic
fields on this system (at ambient pressure) at the
LNCMI-Toulouse [17]. Transport (see Fig. 6)
and torque measurements have been performed
in pulsed magnetic fields up to 60 Tesla, and
thermal expansion measurements were
performed in continuous fields up to 13 Tesla.
Fig. 6 shows measurements of the
magnetoresistance up to 50 Tesla and
temperatures between 1.5 K and 80 K. At low
temperatures, a step-like anomaly is observed at
a critical field H * of around 26 T. This
corresponds to a field-induced first-order
transition to a magnetically polarized regime,
where all the microscopic magnetic moments (on the Ce 3+ sites) are aligned ferromagnetically along the field
direction. Additional torque measurements (not shown here) permitted to see in fact two transitions to the
polarized state, at H * 1 ≈25.6 and H * 2 ≈26.0 Tesla (see also [18]). The strong change of resistance between the
antiferromagnetic and the polarized phases may indicate an important modification of the electronic properties,
which may be related to a reconstruction of the Fermi surface of the system. At higher temperatures, a magnetic
anomaly characteristic of the field-induced transition between the antiferromagnetic and polarized states can be
followed from our measurements: its characteristic field decreases with increasing temperature, and vanishes at
TN,1 = 36 K. A change from a first order to a second order transition is observed at about 20 Kelvin. At
temperatures higher than T N,1, a broad anomaly (at H pol) is associated to the crossover between the low-field nonpolarized
paramagnetic regime and the high-field polarized paramagnetic regime.
Fig 6 : Magnetic field-temperature phase diagram of
CeRh2Si2 obtained by transport, torque and thermal
expansion.
This study permitted to determine carefully
the magnetic field-temperature phase
diagram of CeRh 2Si 2, when a magnetic field
is applied along the easy-axis c. The phase
diagram shown in Fig. 6 was obtained from
the combination of our transport, torque, and
thermal expansion measurements. The
transition temperatures T N,1 and T N,2 are
found to decrease with increasing magnetic
fields, before merging at about 24 T and 20 K.
This point may correspond to a tetra-critical
point, where two first-order transition lines
reported below 20 K (and above 24 T) also
end. Changes of the physical properties close
to this point are not trivial since, from our
resistance measurements, a reminiscence of
the first order transition can be followed up
to 25 Tesla, while the second order line can
also be defined down to 15 Tesla. At higher
temperatures, the characteristic field Hpol of
the crossover between the paramagnetic nonpolarized
and polarized regimes is found to
vary almost linearly with T, which confirms that its nature is simply related to the Zeeman effect.

References
[1] D. Shoenberg, Magnetic Oscillations in Metals (Cambridge Univ. Press, Cambridge, 1984).
[2] B. Vignolle et al, Nature 455, 952 (2008).
[3] N.E. Hussey et al, Nature 425, 814–817 (2003).
[4] M. Platé et al, Phys. Rev. Lett. 95, 077001 (2005).
[5] M. Norman et al, Nature 392, 157 (1998).
[6] N. Doiron-Leyraud et al, Nature 447, 565 (2007).
[7] C. Jaudet et al, Phys. Rev. Lett. 100, 187005 (2008).
[8] S.E. Sebastian et al, Nature 454, 200 (2008).
[9] A. Bangura et al, Phys. Rev. Lett. 100, 047004 (2008).
[10] D. LeBoeuf et al, Nature 450, 533 (2007).
[11] S. Chakravarty and H.-Y. Kee, PNAS 105, 8835 (2008).
[12] A.J. Millis and M. Norman, Phys. Rev. B 76, 220503(R) (2007)
[13] A. Audouard et al, arXiv: 0812.0458 (2008)
[14] J. Levallois et al, EPL 85 (2009) 27003
[15] Kawarazaki et al., Phys. Rev. B 61 (2000), 4161
[16] Movshovich et al, Phys. Rev. B 53 (1996), 8241
[17] W. Knafo et al, in preparation
[18] Settai et al, J. Phys. Soc. Jpn. 66 (1997), 2260
19

Personnel involved:
Organic conductors
Permanents: A. Audouard (CR1), M. Nardone (IR), D. Vignolles (MC)
Collaborations: V.N Laukhin, E. Canadell (ICMAB Barcelona)
R.B. Lyubovskii, R.N. Lyubovskaya, E.B. Yagubskii (IPCP, Chernogolovka)
J.-Y. Fortin (Laboratoire Physique théorique, Strasbourg and Institut Jean Lamour, Nancy)
Due to their rather simple Fermi surface (FS), organic metals provide a powerful playground for the
investigation of quantum oscillation physics. Indeed, in most cases, their FS can be regarded as networks of
orbits coupled by magnetic breakdown (MB) giving rise to quantum oscillations spectra with numerous
frequency combinations that cannot be accounted for by the semiclassical model of Falicov and Stachowiak.
This phenomenon which is attributed to either the formation of Landau bands or (and) the oscillation of the
chemical potential in magnetic field needs to be better understood.
Frequency combinations in linear chains of orbits with high scattering
rate
The FS of (BEDO) 5Ni(CN) 4·3C 2H 4(OH) 2 (see the opposite figure)
corresponds to a linear chain of quasi-two-dimensional orbits coupled by
MB. Remarkably, the scattering rate can be consistently deduced from the
Shubnikov-de Haas oscillations data relevant to both the basica, the second
harmonic 2a and the MB-induced b orbits. Its large value points to a
significant reduction of the chemical potential oscillations. Despite of this
feature, the oscillations spectrum exhibits many frequency combinations [1].
Their effective masses and (or) Dingle temperature are not in agreement
with neither the predictions of the quantum interference model nor the
semiclassical model.
Frequency combinations in networks of compensated orbits
According to calculations [2] chemical potential oscillations are strongly
reduced for 2D metals with compensated orbits. 2D networks of
compensated orbits are achieved in the compound (ET) 8[Hg 4Cl 12(C 6H 5Br) 2]
as displayed in the opposite figure where the two a orbits with different
shapes are compensated while thed and D pieces are forbidden orbits. In
agreement with the above statement, all the frequency combinations
observed in early de Haas-van Alphen (dHvA) oscillations spectra up to 28
T data are consistent with the semiclassical picture [3]. Oppositely, recent
dHvA data obtained from torque measurements up to 55 T exhibit many
frequency combinations, most of them being forbidden within the
semiclassical framework [4]. Otherwise, the pressure dependence of the
effective mass linked to the basic a orbits scales with the coefficient of the T² law of the zero-field resistance
which is in line with a Brinkman-Rice scenario expected for strongly correlated compounds [5].
References
[1] D. Vignolles et al., Eur. Phys. J. B. 55 383 (2007).
[2] J.-Y. Fortin and A. Audouard, Phys. Rev. B 77 134440 (2008).
[3] A. Audouard et al. EPL 71 783 (2005).
[4] D. Vignolles et al., in preparation
[5] D. Vignolles et al., Eur. Phys. J. B. 66 489 (2008).
20

Personnel involved:
Semiconductors
Permanent: J. Leotin (Emeritus), J.M. Broto (E/C), B. Raquet (E/C), M. Goiran (E/C), J. Galibert (C),
H. Rakoto* (ITA), M. Nardone (ITA), S. George (ITA), O. Portugall (ITA)
* Deceased in September 2008.
Non permanent: M. Millot (Ph. D), JM. Poumirol (Ph. D ), N. Ubrig (Ph. D ).
Collaborations: M. Semtsiv, F. Hatami, T. Masselink (Institute of Physics, Humboldt Univ. Berlin), D. Smirnov
(NHMFL, Tallahassee), V.I.Gavrilenko, (Institute for Physics of Microstructures RAS, Nizhny Novgorod),
O.Drachenko, M. Helm (Forschungzentrum Dresden-Rossendorf, Germany), V. V. Rylkov (Kurchatov Institute,
Moscow), V.T Dolgopolov (Institute of Solid State Physics, Chernogolovka, Russia), A. Gold (CEMES,
Toulouse), H. Ohta (Molecular Photoscience Research Center, Kobe University, Japan), Alfredo Segura,
Universidad de Valencia (Spain).
The activity in the semiconductor domain covers essentially three different aspects: one is focussed on the
electronic structure of semiconductors, mainly low dimensional systems, through the investigation of high
magnetic field quantum effects on transport and spectroscopy in the Vis-FIR range, a second research axis is
devoted to the study of the correlations in strongly interacting 2D electron systems and the third one concerns the
properties of magnetic semiconductors. In the following section some results obtained in these different aspects
are presented.
Xt -Xl valleys crossover in AlP-GaP quantum wells
We have established by high magnetic field spectroscopy and magnetotransport on 2DEG confined in AlP/GaP
quantum wells (QW) that bulk AlP X-valleys are located exactly at the edge of the Brillouin zone and that in
many respects, the valley symmetry in AlP quantum wells (QW) with GaP barriers is similar to that of the AlAs
quantum wells with GaAs barriers. As expected for such systems, the valley degeneracy is lifted into a single Xzvalley
and a twofold X xy-valleys, due to on the one hand the valley-anisotropy confinement splitting and on the
other hand the biaxial strain splitting caused by the lattice mismatch between AlP and GaP. In the present study,
we have investigated the properties of quasi-two-dimensional electrons in a wide range of modulation-doped AlP
quantum wells (between 3 and 15 nm) with GaP barriers by measuring cyclotron resonance(CR), quantum Hall
effect, and Shubnikov de Haas oscillations. The experiments down to 1.55K were performed under high pulsed
magnetic field while static fields were used for the low temperature transport measurements down to 280mK.
Figure 1 summarizes the CR data, obtained at 4K on two different samples, one being a 15nm wide multi-QW
with 50 periods, and the other a 4nm wide single-QW.
Energy, meV
6
5
4
3
2
1
m*= (0.30�0.02 )m 0
m*= (0.52 �0.01�m 0
0
0 5 10 15 20 25 30
Magnetic field (T)
Fig. 1. Values of the resonant fields determined
from CR at different excitation energies for the
15nm MQW structure (full circles) and the 4nm
SQW (open circles).
21
The two straight lines indicate parabolic conduction
bands in the investigated energy range for both Xz
and X xy valleys, the deduced cyclotron masses are
mc1=0.30�0.02m0 and mc2=0.52�0.01m0
respectively. The iso-energy surfaces are then
ellipsoids elongated along the �line of the BZ with
longitudinal and transverse effective masses: ml/m0
= 0.9�0.02 and m t/m 0 = 0.3�0.02. Regarding the
valley degeneracy, a direct determination is derived
for each QW from combination of longitudinal and
Hall resistances data.
Fig. 2 shows R xx(B) and R xy(B) for a 10nm wide QW at 1.55K and for a 3nm wide QW at 280 mK. In Fig2a,
standing for the wide QW having the Xxy-valley populated the sequence of integer filling factors is incremented
by 4 at low magnetic fields, high Landau quantum numbers, and then by one at low quantum numbers.

1,0x10 4
Rxy(��
5,0x10 3
QW, t= 10nm T = 1,55K
Rxx(��
��22
��18
14 10
6
��5
0,0
0
0 10 20
Magnetic Field (T)
30 40
4
3
3x10 3
8,0x10 3
2x10 3
1x10 3
Rxy(��
4,0x10 3
22
0,0
QW, t= 3nm T = 280mK
12
��14
10
0 2 4 6 8 10 12 14 16 18 20
Magnetic Field (T)
Fig. 2. Rxx(B)and Rxy(B) for SQW having 10nm (a) and 3nm well width (b).
Consequently, the Landau degeneracy equal to 4 gives gv=2 for the Xxy-valley. Accordingly, a valley degeneracy
g v=1 is expected for the populated X z-valley of the 3nm sample. This is precisely displayed by the data in Fig. 2b
showing a sequence of filling factors incremented by 2 at low magnetic fields and by one at high magnetic field.
Further experiments have revealed that the the X t -X l valleys crossover occurs at AlP QW thickness between 4
and 5 nm.
[1]. M. P. Semtsiv, S. Dressler, and W. T. Masselink, V. V. Rylkov, J. Galibert, M. Goiran, and J. Léotin.
Phys.Rev.B 74, 041303(R), 2006.
[2] Goiran M., Semtsiv M.P., Dressler S., Masselink W.T., Galibert J., Fedorov G., Smirnov D., Rylkov V. V.,
Léotin J. Proc 13 th Int. Conf Narrow Gap Semiconductors « NGS 13 » Guilford UK July 8 th 12 th , 2007
High-pressure magneto-spectroscopy on the III-VI layered semiconductor InSe
Indium selenide is a layered semiconductor widely investigated in the last decades for its potential optoelectronic
applications. In the past various experiments revealed the electron effective mass anomalous behaviour. Modern
ab-initio band structure calculations combined with optical measurements under high pressure have explained
this anomaly and have also unveiled new interesting features such as the onset of a ring-shaped valence band
maximum above 2 GPa .
Taking advantage of a novel non-magnetic Diamond Anvil Cell (DAC) [1] we have performed both magnetophotoluminescence
(MPL) and magneto-absorption (MA) investigations under high pressure up to 6 GPa
providing a very deep insight on the electronic structure of n- and p-type InSe.
Ener gy ( eV)
1,60
1,55
1,50
1,45
1,40
Effec tive ma ss ( m o u nits)
0.15
0.14
0.13
0.12
0 1 2 3
24 kBar
4 K
Pressure (GPa)
0 10 20 30 40 50 60
Magnetic field (T)
Magnetic field fan chart of interband Landau-level
absorption measured under pressure (24 kBar).
Insert : pressure enhancement of reduced m*.
��8
7
6
5
4
3
1,5x10 3
Rxx(��
1,0x10 3
5,0x10 2
MA, excitonic and interband Landau-level absorption
bands yielded an accurate determination of the
diamagnetic coefficient and as well as the exciton effective
Rydberg magnetic field dependence. The pressure
behavior of the conduction band exhibiting a strong nonparabolicity
can be well described within a specific k.p
model. Moreover, the toroidal VBM has been unraveled
through reentrant excitonic absorption at high field owing
to a larger hole effective mass. Combining our MA
experiments together with p-type MPL as a function of
pressure allowed to establish the valence band structure
with an overwhelming accuracy. Finally, the direct-toindirect
conduction-band crossover around 4 GPa has been
characterized by effective mass, dielectric constant and
Rydberg evolution [2].
[1] Millot et al Phys. Rev. B. 78, 155125 (2008)
[2] Millot et al. Fortaleza - Brazil, July 2008, Phys. Stat. Sol. (b), 246(3), 532 - 535 (2009)
0,0

Excitonic states in InP/GaP self-assembled quantum dots probed in high magnetic fields
InP quantum dots (QD) on GaP have been much less investigated than InGaAs/GaAs self-assembled (QD)
Nevertheless this system deserves a strong interest, for both a fundamental understanding of excitons in QD
based on direct-indirect bandgap semiconductors, as well as for its potential applications to visible light emitters.
We have performed magneto-photoluminescence (MPL) on InP/GaP quantum dots (QD) between 4 K and 200
K and up to 20 kBar where a brutal quenching of the PL occurs. Both the ground and the first excitonic states are
followed when both p, B and T are swept [1].
The magnetic shift of the PL features unveils the nature of the discrete energy levels and gives access to the
reduced effective mass and confinement energy. Using Fock-Darwin model which is found to match well with
the ground state we found a reduced excitonic mass ��= 0.094 m 0. This value is found to be slightly larger than
expected but agrees well with a biaxial strain induced valence band splitting. Besides, type-I band offset and the
origin of the PL emission are further evidenced through the pressure energy shifts. In fact, strong built-in strain
induced effects are evidenced in these highly mismatched structures by strongly affecting the pressure
coefficient of the ���transition.
P L Energy (eV)
23
2.01
2.00
1.99
1.98
1.97
1.96
1.95
1.94
1.93
1.92
1.91
1.90
1.89
Slope 29 meV/GPa
Slope 18 meV/GPa
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Pressure (GPa)
(Left) Magnetic evolution of the two-peaks PL feature up to 56 T. (Right) Pressure coefficient of the two lines,
exhibiting very low pressure shifts and the enhancement of the confinement energy.
[1] C. Dewitz, F. Hatami, M. Millot, J. M. Broto, J. Leotin, and W. T. Masselink. Accepted in Appl. Phys. Lett.
Spin susceptibility and polarization field in a dilute 2DEG in (111) silicon.
Anomalous properties of strongly interacting two-dimensional (2D) electron systems have attracted a lot of
attention during the last years. While at high electron densities conventional Fermi-liquid behaviour is
established, at very low electron densities qualitative deviations from the weakly interacting Fermi-liquid
behavior are expected. Recently, the drastic increase of the effective electron mass with decreasing electron
density has been observed in strongly correlated 2D electron systems.
The strongest many-body effects have been found in bivalley (100)-silicon metal-oxide-semiconductor fieldeffect
transistors (MOSFETs). This has stimulated a new series of experiments in (111)-silicon MOSFETs.
Here we have studied low-temperature parallel-field magnetotransport in a 2D electron system in (111) silicon in
a wide range of electron densities.
Magnetic field of complete spin polarization
determined from saturation (open symbols) and
from scaling of all curves (closed symbols).
The measurements were done both in dc parallel magnetic
fields up to 14T in a dilution cryostat down to 80mK and as
well as under high pulsed parallel magnetic fields up to 50T in
a He-4 pumped cryostat.
We found that the polarization magnetic field B �, obtained by
scaling the weak-parallel-field magnetoresistance at different
electron densities, tends linearly to zero at a finite electron
density. It corresponds to a large increase of the spin
susceptibility ��gm at low densities which is consistent with
the increase of the effective mass observed earlier in this
electron system. The polarization field Bsat, determined by
resistance saturation, turns out to deviate to lower values
compared to B�at high electron density. This is explained by
the parallel-field-induced filling of the upper electron subbands
in the fully spin-polarized regime. The subbands splitting in our
samples is estimated to be ��2 meV.

A. A. Kapustin, A. A. Shashkin, and V. T. Dolgopolov, M. Goiran , H. Rakoto, Z. D. Kvon.
Phys Rev. B 79, 205314 (2009)
Photoluminescence measurement of Er,O-codoped GaAs under magnetic field up to 60 T.
Rare earth doped semiconductors show photoluminescence (PL) that originates from the intra-4f-shell transition
by the photo excitation of the host semiconductor. Among the various rare earth elements, Er has attracted
particular attention because the 4 I 13/2 � 4 I 15/2 PL transition involving 4f shell of the Er 3+ ion (4f 11 ) occurs at the
wavelength of 1.54 µm, which is important for applications. PL measurements have been performed on the
magnetic semiconductor GaAs:Er,O under the pulsed magnetic field up to 60 T. We have succeeded in
observing the Zeeman effect on the PL.
Our experimental results suggest that the Er center in
GaAs:Er,O has a complicated electronic structure under
high magnetic field. PL of mode A is attributed to the
transition from the 4 I 13/2 to the lowest state in 4 I 15/2.
Furthermore, the experimentally obtained effective gfactor
is in good agreement with theoretically estimated
one based on the crystal field theory.
H. Ohta, O. Portugall, N. Ubrig, M. Fujisawa, H. Katsuno, E. Fatma , S. Okubo, Y. Fujiwara
RHMF 2009, Dresden (Submitted)
24

Personnel involved:
Disordered systems
Permanent: J. Galibert , G. Ballon-Gauran (ITA), M. Nardone (ITA),
Non permanent: T. Dauzhenka (Ph. D)
Collaboration: V.K. Ksenevich (Lab. Physics of Electronic Materials, State University of Belarus, Minsk), V.A.
Samuilov (Garcia Center for Polymers at Engineered Interface, Stony Brook University New York), I.A.
Bashmakov (Research Institute for Physical and Chemical Problems, Belarus State University, Minsk), D.
Seliuta (Semiconductors Physics Institute, Vilnius)
The activity in the domain of disordered systems consists mainly in the studies of the conduction mechanisms
involved in macroscopic samples which conserve its nanometric-scale properties, that is networks of nanoobjects
obtained by self-organization on a surface. Actually this domain of investigation covers two types of
studies: one is devoted to the charge transport mechanisms in self-organized arrays of multi-walled carbon
nanotubes (MWCNT) in the presence of high magnetic field, the second type is devoted to the high magnetic field
properties of low-dimensional arrays of tin-dioxide nanoclusters.
Topic 1 :Charge transport mechanisms in the arrays of MWCNT
Unlike the case of individual nano-objects, in arrays the intertube barriers and defects play an essential
role in the electrical transport properties. Therefore, different charge transport mechanisms can be observed:
metallic conductivity, variable range hopping (VRH), weak localization (WL), fluctuation induced tunneling,
and combinations of the various mechanisms.
In thin layers of MWCNT the variation of the resistance as a function of temperature is negative in the
whole investigated temperature range [4-300 K]. In the range [4-60 K], the resistance follows a Mott's law of
two dimensional (2D) VRH: R=R0 exp(T/T0) 1/3 . Fig.1 shows the relative magnetoresistance ΔR/R0 in the
temperature range in which the VRH is observed.
The minimum position of negative MR shifts to higher fields as the temperature rises. Both low-field
NMR due to changing of phase between alternate hopping paths enclosing a magnetic flux (quantum
interferences) and high-field positive MR (PMR) due to electronic orbit shrinkage are predicted for systems with
hopping conductivity mechanism; ie MR=NMP+PMR. In this model, the amplitude of the NMR declines as the
temperature is rising. But in our samples, the NMR amplitude increases as the temperature increases in the
temperature range in which VRH can be responsible of the charge transport mechanism. From the other side
negative MR is inherent for the systems where conductivity can be described in the frame of WL theory.
Therefore we made assumption that MR data are the sum of the positive and negative contribution due to MR
effects in the VRH and WL regimes, respectively. We found that high-field positive part of MR can be
approximated in frame of Kamimura model for spin-dependent VRH conductivity. This study demonstrates the
role of the surface defects of the NT's by its spins.
Figure 1 From left to right: Relative magnetoresistance in the temperature range in which 2D VRH is observed,
Kamimura's model for PMR (spin dependent VRH) and NMR obtained by subtraction of the calculated PMR
from the experimental results.
25

Topic 2:Two dimensional weak localization in polycristalline SnO 2 films
The phenomenon of quantum interference in disordered conductors is well known and its effects on the
electrical conductance are widely used to determine the inelastic scattering time of charge carriers and, thus, the
mechanisms of inelastic scattering. Because of the prominent effects of weak localization in 2D systems, the last
became an object of intensive studies. But, the reduced dimensionality and the presence of disorder lead not only
to enhancement of interference effects, but also to the necessity to take into account the electron-electron
interaction. It appeared that such characteristics as density of states, temperature and magnetic field dependences
of electrical conductance could be described only if one takes into account the effects of electron-electron
interaction in a disordered low-dimensional system [Altshuler B.L., Aronov A.G. « Electron-electron interaction
in disordered conductors » in Modern problems in condensed matter sciences Vol 10 Efros A.L. & Pollak M.
editors, North Holland 1985]. Moreover, the dephasing mechanisms in weak localization are strongly related to
interaction effects: inelastic electron-phonon scattering, quasi-elastic electron-electron scattering with small
energy transfer. The interplay of interference and interaction effects remains a puzzling problem that is still far
from being solved [Pagnosin et al. Phys Rev B 78, 115311 (2008)].
In our SnO 2 polycrystalline films the low transverse magnetic field dependencies of conductance is
positive and can be described in the frame of a 2D weak localization model, the phase breaking mechanism
being electron-electron scattering with small energy transfer (not shown here).
In Fig.2, the dependencies of magnetoconductance on the normalized magnetic field B/Bφ, measured
on the same sample, are presented in the full range of applied magnetic field up to 50 Tesla. Here, B φ(T) is the
value of magnetic field at which the flux of magnetic field through an area enclosed by the electron's paths
becomes equal to the flux quantum h/2e. From both the inset, where the curves are presented in linear
coordinates, and from the main part of Fig. 2, one can see that at high fields (starting from 8 Tesla) the curves
exhibit different behaviour and do not overlap any more. We thus suggest the necessity to take into account of
the anisotropy of scattering potentials in order to describe the observed results. Different particularities of single
scattering events may influence (manifest) at different temperatures in this high field region.
The experimental curves in Fig. 4 resemble those derived in [Zduniak A. et al., Phys Rev B 56, 1996
(1997) & Germanenko A.V., Minkov G.M., Sherstobitov A.A., Rut O.E. Phys Rev B 73, 233301 (2006)]
where the weak localization model is extended beyond the diffusion limit. In the frame of this model, only small
closed loops are believed to give contribution to the effect of weak localization at such high magnetic fields, the
minimum number of collisions in each loop being 3. One can suppose that relative to electron-electron
interaction effects, these triangles should be easier to study than any complicated electron's path with large
number of collision. As in many materials the dephasing in the weak localization effect was found to be due to
electron-electron interactions, the study of these materials in high magnetic fields should provide important
information about these interactions (single electron's wave function interference is destroyed, so the interaction
effects should give the main contribution to magnetoconductance).
Fig. 2 The magnetic field dependencies of magnetoconductance as a function of normalized magnetic field. Inset
shows field dependencies of magnetoresistance in linear coordinates measured on the same sample.
26

Personnel involved:
Nanosciences
Permanent: J-M Broto (E-C), W. Escoffier(E-C), S. George (Tech), M. Goiran (E-C), O. Portugall (IR), B.
Raquet (E-C), G. Rikken (C).
Non permanent: J. Jorge (PhD), A. Kumar (Post-doc) B. Lassagne (PhD), M. Millot (PhD), S. Nanot (PhD), J-M
Poumirol (PhD), N. Ubrig (PhD)
Collaboration: E. Flahaut (CIRIMAT- Tlse), M. Monthioux & Th. Ondarçuhu (CEMES – Tlse), Ch. Vieu
(LAAS), L. Forro (EPFL), S. Roche (CEA), K. Novoselov (Univ Manchester), J Blokland (HFML - Nijmegen),
F. Gonzalez (Univ. Caracas), J. Gonzalez (Univ. Merida) J. Kono, N.Parra-Vasquez & J. Shaver (Rice
University, Houston), S.A. Crooker & C. Mielke (NHMFL, Los Alamos), M. Potemski & P. Plochocka (LCMI,
Grenoble),Ch. Caillier & A. San Miguel (LPMCN- Lyon), J. Gómez Herrero & D. Martínez Martín (Univ. Aut.
de Madrid, Spain), R.J. Nicholas & I.B.Mortimer (University of Oxford).
An important trend in modern sciences is the investigation of individually addressed objects with properties
determined by a nano-sized group of atoms or molecules. There is an increasing demand from the high magnetic
field community to extend single-object measurements up to the highest magnetic fields, to benefit from the
powerful combination of nanosciences and high fields. Indeed, the magnetic length, defined by lB � �eB
(3 nm
at 74T), becomes comparable to typical dimensions of nano-objects, leading to significant changes in their
energy spectrum: the magnetic field drastically lifts the spin and orbital motions of electrons allowing advanced
magneto-spectroscopy experiments.
Our activities in nanophysics are focused on (i) (magneto)-transport properties of individually addressed carbon
nanotubes and exfoliated graphene and graphene nano-ribbons, and (ii) NIR magneto-optical properties of
carbon nanotubes in solution and epitaxial graphene. Note that individual nano-scale samples are usually
extremely delicate to handle and can easily be damaged by the aggressive electrical environment inherent to the
control of the capacitors bank. Specific procedures, shielding and filters are used to safely measure the 60T
magneto-conductance of individual carbon nanotubes as well as graphene.
Carbon nanotube based devices under magnetic field
Carbon nanotubes have already demonstrated their wide potential in nanoelectronics and optoelectronics even if
their large scale integration raises cumbersome issues. The unique electronic structure of a graphene sheet
combined to a tubular confinement leads to remarkable one dimensional charge transport properties in carbon
nanotubes. In a recent past, both theoretical and experimental evidences unveiled the large energy dependence of
the transport regime in individual CNT (from ballistic to diffusive), by playing with the electrochemical potential
level. In our study, we demonstrate that an applied magnetic field, along with a control of the electrostatic
doping, drastically modifies the electronic band structure of a carbon nanotube based transistor [G. Fedorov & al.,
Phys. Rev. Lett. 94, 066801(2005)]. We give evidence of unconventional quantum phenomena like the giant
Aharonov-Bohm modulation of the electronic density of states [B. Lassagne & al. Phys. Rev. Lett 98, 176802
(2007)] or the onset of propagative Landau states in the high magnetic field regime [B. Raquet & al. Phys. Rev.
Lett. 101, 046803 (2008)].
In a parallel configuration (B applied parallel to the tube axis), a quantum flux threading the tube induces a giant
Aharonov-Bohm conductance modulation mediated Schottky barriers which profile is magnetic field dependent
(Fig.1). Recently, we explore the multi-period quantum flux modulation of the conductance in heavily doped and
ballistic MWCNTs controlled by an efficient back-gate voltage [S. Nanot & al, C. R. Physique, in press (2009)].
In the perpendicular configuration, experiencing the Landau states by Hall measurements remains an unsolved
technological challenge. By playing with a carbon nanotube based electronic Fabry-Perot resonator, we have
recently demonstrated that the electronic transmission of the device can be modified by a moderate transverse
magnetic field (35T) – Fig.2. The field dependence of the resonant states of the cavity reveals the onset of the
first landau state at zero energy. New experiments under 60T give experimental evidence of propagative Landau
states in both semiconducting and metallic CNTs. The two-probe conductance in the high magnetic regime
evolves to a unique conducting state, independently of the electrostatic doping. This remarkable phenomenon is
assigned to the onset of propagative electronic states in high fields along with the closing of the energy gap for
semiconducting tubes.
27

28
Fig.1 : a) Magneto-conductance versus back gate
voltage, under a parallel magnetic field, obtained
at 100K on a quasi-ballistic MWCNT. Experimental
evidence for a quantum flux modulation of the
conductance mediated by the electrostatic doping.
Dashed lines are the Landauer/Büttiker simulations
b) and c) Profiles of the magnetic field induced
Schottky barriers. d) 2D-color plot of the
conductance versus energy and magnetic flux,
experiment (left) and theory (right) [B. Lassagne &
al, Phys. Rev. Lett 98, 176802 (2007)]
Fig.2 : Conductance maps G(E,� B) as a function of energy and magnetic strength in the Fabry-Perot regime.
Experimental map (left) compared to the theoretical one (right). In inset, design of an individual carbon
nanotube based device developing FP resonances [B. Raquet & al. Phys. Rev. Lett. 101, 046803 (2008)].
Complementary studies, less central, have been also developed on the electronic properties of individually
addressed DWCNT and MWCNTs.
- Electronic noise measurements on DWCNTs. We demonstrate that CNTs are low noise conductors once
the structural quality, the gaseous environment and the contact transparency are under control [B.
Lassagne & al., New J. Phys. 8(3) 2006].
- Raman Spectroscopy of individual MWCNT versus the electrostatic doping. The G-band, constituted of
4 peaks, is modified by shifting of the Fermi energy. We infer the efficiency of the electrostatic
coupling from shell to shell in the multi-walled structure [S. Nanot, submitted].
- Electronic transport under high hydrostatic pressure on an individual DWCNT based FET. We study
the conductance versus energy under pressure, up to 10kbar [S. Nanot & al, unpublished].
- Preparation, characterization and electronic properties of �-Fe nanowires located inside Double Wall
Carbon Nanotubes. Capillary effect was used to fill DWCNTs with iron. We observe the presence of �-
Fe nanowires inside DWCNTs, ferromagnetic at 300K [J. Jorge & al, Chem. Phys. Lett. 457, 347
(2008)].
Electronic properties of graphene and few layers graphene
Research exploring the physics of low-dimensional nano-objects is at the heart of a thriving world-wide effort,
attempting to investigate how size effects, atomic arrangements and interactions can produce new and
unexpected physical phenomena. Beyond its fundamental interest, the investigation of 2D or quasi-2D carbonbased
materials (i.e. graphene and few-layer graphite) may end up with various promising applications. For
instance, their integration into electronic circuits may provide a genuine alternative to overcome the fundamental
limitations of conventional silicon-based technology. Nevertheless, this requires first a thorough understanding
of these systems, and this is where fundamental research comes into play. For this purpose, magneto-transport
experiments have been performed on few layer graphite and graphene at low temperature and under high

magnetic field. In such system, the charge carrier density can be continuously tuned through the application of a
back gate voltage, allowing fine investigations over a broad range of experimental conditions.
In few layer graphite, magneto-transport experiments have been performed to probe the co-existence of two
types of charge carriers, namely massive and Dirac fermions, which dynamics reveal itself into different
signatures in the Quantum Hall Effect. By mean of changing the carrier concentration and upon approaching the
charge neutrality point (i.e. compensation of hole-like and electron-like charge carriers), the system tends to
reproduce the peculiar behaviour of graphene, for which massless Dirac fermions govern its electronic properties
[W. Escoffier & al, submitted].
and Dirac holes.
29
Figure 3 a) Spectral intensity
of oscillations of ΔRXX(B) for
selected gate voltages. Notice
peaks labeled α and β,
originating from Dirac and
normal holes respectively. b)
and c) Fan chart constructed
from peak αand βrespectively
for selected gate voltages ; the
linear extrapolation intercepts
the x-axis to index 0 and -1/2.
d) frequency shift for peaks α
and βversus gate voltage, a
linear fit is used to compute the
charge carrier concentration
and gate efficiency for massive
----------
The electronic properties of graphene have been investigated in the Quantum Hall regime. In the limit of very
low filling factors (low carrier density and very high magnetic field), a splitting of the spin and/or valley
degeneracy is expected for this system. Up to now, very few experiments have demonstrated these predictions
which remain a matter of debate. Actually, the main experimental difficulties lie in the fabrication of high
quality graphene samples (high mobility) and the production of high magnetic fields to reach low filling factors.
Recently, pulsed-field magneto-transport measurements with graphene have been performed in Toulouse and
showed very peculiar features for the n=0 Landau Level at high magnetic field [J-M Poumirol, in preparation].
Even if the sample’s mobility was still too low to fully investigate the above-mentioned predictions, this
experiment has demonstrated the feasibility of such an experimental method, while new samples with improved
quality are being prepared.
Figure 4 Longitudinal resistance R xx and Hall resistance R xy
simultaneously recorded as a function of magnetic field at
T=1.6K and V_g=0V. The charge carrier density is estimated
to n=4.1x10 12 cm -2 from the low field Hall resistance. Note
that we find a slightly different carrier density when analysing
the periodic structures of R xx(1/B), indicating local charge
carrier inhomogeneities across the measuring electrodes.
Insert: longitudinal resistance as a function of back gate
voltage at T=1.6K: the charge neutrality point is located at
V_g=+52. The sample’s mobility is estimated to about 1500
cm 2 /V.s

Spectroscopy of carbon nanostructure in high magnetic fields
Using an InGaAs detector array we investigated the high-field optical and electronic properties of carbon
nanotubes. For the photoluminescence (PL) experiments we used a titanium-sapphire Laser and various laser
diodes. With this method we were able to show the effects of magnetic field on the electronic properties of
carbon nanotubes, i.e. adding an Aharonov-Bohm phase on the band structure and modifying the PL spectra in
fields up to 77 T [1]. The high-field PL spectroscopy of carbon nanotubes also revealed an increase in intensity
of the PL peaks, the so-called magnetic brightening [2,3]. By using highly aligned films of carbon nanotubes, we
have demonstrated that the rather weak brightening observed under the influence of a perpendicular magnetic
field reflects only the residual disorder in the film. The brightening thus relates exclusively to the magnetic field
component parallel to the tube axis [4]. We also were able to determine quantitatively the zero field splitting of
the two lowest exciton states, responsible for the magnetic field induced brightening [4]. This has been achieved
by fitting a theoretical model to the available high-field data and extrapolating the exciton energies to B=0.
30
Fig. 5: PL peak evolution for highly aligned
samples perpendicular and parallel to the magnetic
field. The brightening for the field perpendicular to
the sample reflects only the residual disorder in the
film [4].
The band structure of graphene yields to unconventional effects such as electrons behaving like massless Dirac
fermions. Thus the Landau level structure is different from other 2-D semiconductors. At high fields and high
energies theoretical models predict an asymmetry between electrons and holes. The absorption of circular
polarized light should reveal it. The analysis of our NIR measurements of this effect is still in progress.
[1] S. Zaric et al, Phys. Rev. Lett. 96 (2006) 016406, [2] J. Shaver et al, Nano Lett. 7 (2007) 1851, [3]
I.B.Mortimer et al, Phys. Rev. B (2007) 085404, [4] J. Shaver et al, Phys. Rev. B 78, (2008) 081402.
Dynamic alignment of single walled carbon nanotubes in aqueous suspensions
The main purpose of this work is to investigate the dynamic properties of carbon nanotubes in different aqueous
suspensions. Due to different magnetic susceptibilities, for metallic and semiconducting tubes, along the tube
long axis and perpendicular to it, carbon nanotubes will align parallel to an external magnetic field.
To quantify this effect we analyse the field induced linear dichroism : a valuable method to detect magnetic
anisotropies and to quantify it. A theoretical model based on the Smoluchovski equation for rigid rods were
developed in order to determine quantitatively other effects governing the alignment such as temperature,
viscosity, bundling or length distribution of nanotubes. [1]
Fig.6 Comparison between calculated (black) and
measured (purple) linear dichroism (LD). The LD
is following the magnetic pulse (green) [1].
[1] Shaver et al, ACS nano 3 (2009), 1

Personnel involved:
Permanent: R. Battesti (EC)
Magneto optics
Non permanent: J. Mauchain (CDD, IE), F. Bielsa (post doc)
Collaboration: LCAR (UMR 5589, Toulouse)
LMA (UPS 2713 , Villeurbanne)
Magnetic Birefringence of Vacuum (BMV)
1. Introduction
The activity of our group is devoted to
perform experimental test of fundamental
interest using high magnetic fields and optical
techniques.
Since 2001 we are pushing forward
collaboration with LCAR of Toulouse and
LMA of Lyon to measure the vacuum
magnetic birefringence (BMV Project), a QED
prediction. From 2006 to 2008 we have also
performed a measurement at LULI of the
Ecole Polytechnique to search for photon
oscillations into massive particles (Boson
project) always in collaboration with the
LNCMI of Toulouse. Photon oscillations into
massive particle can be at the origin of effects
mimicking an optical activity of vacuum, and
therefore they are strictly related with the
search for the Cotton-Mouton effect of vacuum.
2. BMV project
The BMV project goal is to measure
the birefringence induced in vacuum by an
external magnetic field (Birefringence
Magnétique de Vide), a QED prediction which
dates from 1935 and not yet experimentally
proved. This magnetic birefringence, also
known as Cotton-Mouton effect, has been
measured in gases since the sixties and it exists
in any medium.
The BMV project is a collaboration
between the LNCMI of Toulouse and the
LCAR. Our experiment is now fully
operational in a clean experimental room
hosted by the LNCMI and we have performed
31
our first measurements. We will describe them
in the following.
Our experimental setup is described in
ref [1]. A Nd-YAG laser (�=1064 nm) is
locked on a 2.2 m optical resonant Fabry-
Perot cavity using the Pound-Drever-Hall
technique. The light is polarized by a high
quality polarizer and the transverse magnetic
field is delivered by two especially designed
coils (Xcoil). To increase as much as possible
the effect to be measured we need a very high
finesse cavity. The polarization of the light
transmitted by the Fabry-Perot cavity is
analyzed by a second high quality polarizer.
As far as the optical cavity is
concerned, we used different sets of mirrors in
order to test more and more efficient
configurations. Mirrors are characterised by
their reflectivity from which we can deduce the
nominal finesse of the cavity. We have locked
our laser to cavities of finesse about 5 000 and
about 130 000. We have also at our disposal
mirrors built by the LMA of Lyon with which
we collaborate since the beginning of the
project in 2001. The finesse of the cavity
realized using such mirrors is expected to be
about 650 000.
The experimental finesse is measured
by measuring the lifetime of photons in the
cavity. We shut down the laser and we
measure the intensity of transmitted light
versus time. The transmitted light intensity
decays exponentially. Once light lifetime in the
cavity is known, finesse can be calculated. We
have currently reached a cavity finesse of 131
000 (decay time of 306 μs). The full width at
maximum of the cavity resonance line has a

typical FWHM of 500 Hz, which is one the
smallest value ever reached in the optical
region.
The second important point is the
transverse magnetic field. We are using two
identical coils developed especially for this
experiment (ref [2]). Because the Cotton
Mouton effect is proportional to the square of
the magnetic field the pertinent factor for
evaluating the coil performance is the product
B² times L0 where L0 is the length of the
magnetic field region. Each coil can produce
10 T at the center which gives 30 T²m for each
coil.
In order to test our apparatus, we
measured the Cotton Mouton effect in nitrogen
in July 2008.
beam and the square of the magnetic field. Our
result is in a very good agreement with others
existing data. Moreover, this is the first
Cotton-Mouton measurement ever performed
with pulsed coils. After this probing test, we
have measured the smallest Cotton Mouton
effect known in gases, the one given by helium
gas. This measurement is quite difficult and
only three measurements are published. Our
preliminary measurements at different
pressures give a birefringence corresponding to
an anisotropy of the index of reflection at 1 T
field and a gas pressure of 1 atm
�n u=(2.1±0.4)×10 -16 . The predicted value by
However, the axion mass and two
photon inverse coupling constant inferred from
these PVLAS measurements were seriously
inconsistent with the CAST limits [5], albeit
the latter are model dependent. As a
consequence, there was an urgent need for a
direct independent experimental test of the
observed dichroism.
This raised a renewed interest in
axionlike particle search, in particular for
model independent purely laboratory-based
experiments. The most popular setup,
commonly called "light shining through a
wall", is a photoregeneration experiment based
on the Primakoff effect coupling an axionlike
particle with two photons (a real one from the
laser field and a virtual one from an external
magnetic field) [ 6 ]. The experiment consists of
converting photons into axionlike particles of
32
ab initio computational methods is �n u =
2.37×10-16 (ref [3]).
In conclusion, 2008 has been the year
of our first birefringence measurement. Our
results are all in agreement with previous ones,
and with theoretical ones. Our sensitivity in
�n u is at the moment of the order of 10 -17 . In
2009 and 2010 we will test the limits of our
present set up.
Major improvements are further
needed to reach the Cotton Mouton effect of
vacuum, such as the upgrade of the mechanical
rotation and tip tilt of polarizers and of the
cavity mirrors, the upgrade of the cavity
finesse, the upgrade of the vacuum system and
the upgrade of the magnetic field. A new coil
has been designed with new wires, bigger size,
in order to reach 25T at the centre and a B²L of
190 T²m in usual working conditions. Our goal
is to put at least three of these coils on the
experiment. A new bank of capacitors to
supply the current for such coils is also needed.
To enter in this new phase, the experimental
set up has to be accurately reshaped.
3. Boson project
In 2006, the Italian collaboration
PVLAS announced the unexpected observation
of a magnetic dichroism in vacuum, which
they suggested might be due to
photoregeneration of axionlike particle [4].
identical energy in a transverse magnetic field,
then blocking the photon beam with a wall.
The axionlike particles hardly interact with the
wall and are converted back to photons in a
second magnet. Finally, the regenerated
photons are counted with an appropriate
detector. Such an experiment was conducted in
the 1990s by the BFRT Collaboration without
detecting any regenerated photon signal, which
led to limits on the axion parameters [ 7 ].
Mainly motivated by the PVLAS astonishing
results, several ‘‘light shining

Figure 1 : 3�limits for the axion-like particle - two photon
inverse coupling constant M, as a function of the axion-like
particle mass ma, obtained from our null result. The area
below our curve is excluded. Our limits are compared to
those from other experiments.
through a wall’’ experiments have been
built since 2006 at DESY, CERN, Jefferson
Laboratory, Fermilab and at LULI (Laboratoire
pour l'Utilisation des Lasers Intenses), in
France, by our group.
Experimentally, the main difficulty lies
in detection. The expected regeneration rate is
indeed very weak—less than 10 -20 —so that
optical shielding has to be perfect and the
detector background very low. We have found
an original and efficient way to solve the
detection problem as both the laser and the
magnetic field were pulsed, as well as our
detector. Contrary to other similar experiments
requiring long integration times, we were not
limited by the background of the detector as
the photons were concentrated in very intense
and short laser pulses. In collaboration with the
LULI in Palaiseau and the LNCMI
(Laboratoire National des Champs
Magnétiques Intenses) in Toulouse, we rapidly
set-up the experiment in the LULI2000 laser
hall in Palaiseau, so that we were the first to
present, in June 2007, the results of our pulsed
‘‘light shining through a wall’’ experiment,
definitively invalidating the axion
interpretation of the original PVLAS optical
measurements with a confidence level larger
than 99.9% [8]. Our latest results, obtained
33
after 3 more weeks of data acquisition in
September 2007 and January 2008, are
presented in Figure 1 : 3�limits for the axionlike
particle - two photon inverse coupling
constant M, as a function of the axion-like
particle mass m a, obtained from our null result.
The area below our curve is excluded. Our limits
are compared to those from other experiments..
We have found that the axionlike particle two
photons inverse coupling constant M is > 9.10 5
GeV for low axion masses. Our measurements
also improved the existing limits on the
parameters of a low mass hidden-sector boson
usually dubbed "paraphoton" because of its
similarity with the usual photon [9].
[1] : R. Battesti et al, The BMV experiment: a
novel apparatus to study the propagation of
light in a transverse magnetic field, Eur. Phys.
J. D 46, 323–333, 2008.
[2] : S. Batut et al., A transportable pulsed
magnet system for fundamental investigations
in quantum electrodynamics and particle
physics, IEEE Trans. Appl. Supercond., 18,
Issue: 2 , p.600-603, 2008.
[3] : C. Rizzo et al (and references herein), Int.
Rev. Phys. Chem., 16, 81, 1997.
[4] : E. Zavattini et al., Experimental
Observation of Optical Rotation Generated in
Vacuum by a Magnetic Field , Phys. Rev. Lett.
96, 110406 (2006).
[5] S. Andriamonje et al. (CAST
Collaboration), An improved limit on the
axion–photon coupling from the CAST
experiment, J. Cosmol. Astropart. Phys. 04,
010 (2007).
[6] : K. Van Bibber et al., Proposed
experiment to produce and detect light
pseudoscalars, Phys. Rev. Lett. 59, 759 (1987).
[7] : R. Cameron et al., Search for nearly
massless, weakly coupled particles by optical
techniques, Phys. Rev. D 47, 3707 (1993).
[8] : C. Robilliard, R. Battesti, M. Fouché, J.
Mauchain, A.-M. Sautivet, F. Amiranoff, and
C. Rizzo, No ‘‘Light Shining through aWall’’:
Results from a Photoregeneration Experiment,
PRL 99, 190403 (2007)
[9] : M. Fouché et al.,Search for photon
oscillations into massive particles , Phys. Rev.
D 78, 032013, 2008.

Personnel involved:
X-ray and neutron scattering
Permanent: F. Duc, P. Frings, J. Billette, M. Nardone, G.L.J.A. Rikken.
Non permanent: K. Chesnel, B. Vignolle, A. Zitouni.
Collaboration: C. Detlefs, T. Roth, C. Strohm, O. Mathon, S. Pascarelli (ESRF, Grenoble), J. Vanacken (INPAC,
Leuven), J.E. Lorenzo (Institut Néel, Grenoble), W. Bras (DUBBLE CRG, ESRF), Z.A. Kazeĭ(Moscow State
University, Russia), P.C. Canfield (Ames Laboratory, USA), R. Suryanarayanan (LPCES, Paris).
H. Nojiri, K. Ohoyama, S. Yoshii (Institute for Materials Research, Tohoku University, Japan), M. Matsuda
(JAEA, Tokai, Japan), L-P. Regnault (CEA-Grenoble, DRFMC-SPSMS-MDN).
High magnetic field synchrotron X-ray powder diffraction
A mobile pulsed magnetic field installation has been developed at the LNCMI-Toulouse (LNCMI-T) to combine
pulsed magnetic fields with an intense X-ray source. With this setup, high field X-ray powder diffraction
experiments have been performed for the first time at the European Synchrotron Radiation Facility (ESRF,
Grenoble) with magnetic fields up to 30 T [1].
Direct observation of the high magnetic field effect on the Jahn-Teller state in TbVO4
During our pilot experiments, we have directly measured the effect that a 30 T magnetic field has on the Jahn-
Teller (JT) state in terbium orthovanadate TbVO 4. This compound is a textbook example of a material exhibiting
the cooperative JT effect driven by phonon-mediated interactions between the terbium quadrupole moments [2].
At high temperatures, it crystallizes in the tetragonal zircon structure whereas on lowering the temperature to
less than 33 K it undergoes a cooperative JT transition and the crystal spontaneously distorts along the [110]
direction, lowering the symmetry to orthorhombic. The balance between TbVO 4’s magnetic and quadrupolar
effects can be tuned by varying the strength of an applied field. The effect of large external magnetic field on
TbVO 4 has only recently been studied [3]. It was predicted that the JT distortion would be suppressed when
fields more than 29 T were applied along the c-axis of the sample.
Fig. 1: Comparison between calculated and measured spectra
for various fields (0-30T) and for temperatures 7.5 K (left) and
39 K (right). A T = 39 K and 30 T, the dotted curve (in red)
corresponds to the calculations including the magnetocaloric
effect, and the green line to the calculations with the
magnetoelastic constant reduced by 25%.
34
The data shown on figure 1 were collected on
the DUBBLE CRG beamline (BM26B) by
accumulating about 45 magnetic field pulses
per powder diffraction spectrum. For each field
pulse a mechanical shutter exposed the image
plate detector for 4.9 ms centered around the
maximum field.
The JT transition manifests itself as a splitting
of some of the powder lines in the spectrum
due to the distortion of the crystal lattice.
Within the photon energy range studied, the
(311)/(131) and (202)/(022) pairs of reflections
are sensitive to the JT distortion (fig. 1).
Spectra taken at different fields strengths (15
and 30 T) showed a reduction of the splitting
below the JT transition (fig. 1, left) and the
appearance of splitting above the transition (fig.
1, right), thus providing evidence for the
modification of the JT distortions of TbVO4 by
magnetic fields.

In order to quantitatively describe the effect outlined above we have performed comprehensive mean field
calculations of the magnetoelastic distortion of TbVO4 as a function of the strength and direction of the
externally applied magnetic field [4]. The applied magnetic field was found to influence both the magnitude of
the order parameter, as observed in the splitting of the (311)/(131) and (202)/(022) pairs of Bragg peaks, and the
relative domain populations, reflected in the intensity ratio between the partners of a pair. Although the observed
splitting followed the predicted spectra, the degree of splitting was lower than expected. Various theories to
explain the quantitative difference have been proposed, one being sample heating due to the magnetocaloric
effect.
[1] P. Frings, J. Vanacken, C. Detlefs, F. Duc, J. E. Lorenzo, M. Nardone, J. Billette, A. Zitouni, W. Bras and G. L. J. A.
Rikken, Rev. Sci. Instrum. 77, 063903 (2006).
[2] G. A. Gehring and K. A. Gehring, Rep. Prog. Phys. 38, 1 (1975).
[3] A. A. Demidov and N. P. Kolmakova, Physica B 363, 245 (2005).
[4] C. Detlefs, F. Duc, Z. A. Kazeĭ, J. Vanacken, P. Frings, W. Bras, J. E. Lorenzo, P. C. Canfield and G. L. J. A. Rikken,
Phys. Rev. Lett. 100, 056405 (2008).
Magnetic field induced structural transition in the electron-doped manganite Ca0.8Sm0.16Nd0.04MnO3
The physical properties of manganite compounds, R1-xDxMnO3 (R = rare-earth La, Nd, Sm; D = alkaline-earth
metals Sr, Ca, Ba,...), such as colossal magnetoresistance (CMR) effect, charge ordering, orbital ordering and
phase separation have been extensively studied during the last ten years. One of the main results of manganite
investigation is the discovery of tendencies toward inhomogeneous states, both in experiments and simulation
models [1]. The colossal magnetoresistance effect appears to be closely linked to these mixed phase tendencies
and to the coexistence of a strong competition between the ferromagnetic (FM) metallic state and the insulating
antiferrromagnetic (AF) charge and orbital orders.
In the present work, we have been interested to investigate the structural and magnetic phase separation aspects
in the electron-doped manganite Ca0.8Sm0.16Nd0.04MnO3 [2] using our 30 T pulsed field synchrotron X-ray
powder diffraction set-up, combined with resistivity and magnetization measurements. X-ray experiments were
performed on ID20 at the ESRF whereas the resistivity and magnetization measurements were carried out at the
Institute for Nanoscale Physics and Chemistry (INPAC) in Leuven.
Upon lowering the temperature through 113 K, Ca 0.8Sm 0.16Nd 0.04MnO 3 exhibits a first order structural and
magnetic transition, associated with a metal-insulator transition. Below 125 K, both low field magnetization data
and zero field synchrotron powder diffraction showed the coexistence and competition of two magnetic and
structural phases: a major AF monoclinic state and a minor FM orthorhombic one.
Furthermore, high field X-ray and magnetization measurements at low temperature clearly revealed a field
induced structural change (from a monoclinic to an orthorhombic phase, fig. 2 and 3) associated with a
metamagnetic transition.
Fig. 2: Synchrotron X-ray powder diffraction patterns of
Ca0.8Sm0.16Nd0.04MnO3 at T = 7 K obtained for different
magnetic fields.
35
Fig. 3: Low temperature field dependence of the
monoclinic phase fraction.
[1] E. Dagotto, T. Hotta. and A. .Moreo, Physics Reports-Review Section of Physics Letters 344, 1 (2001).
[2] D. A. Filippov, K. V. Klimov, R. Z. Levitin, A. N. Vasil’ev, T. N. Voloshok, and R. Suryanarayanan, J. Phys.: Condens.
Matter 15, 8351 (2003).

X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) in pulsed magnetic field
By coupling the mobile pulsed magnetic field device developed at the LNCMI-T to the fast acquisition
possibilities of the ESRF energy-dispersive XAS beamline ID24, the feasibility of measuring X-ray magnetic
circular dichroïsm (XMCD) in pulsed magnetic fields up to 30 T using long pulses has been investigated.
Our first high field XAS and XMCD experiments on Gd foil (December 2006) and URhGe single crystal
(February 2007) showed that the feasibility and the quality of the measurement strongly depend on the
mechanical stability of the experimental setup. This high sensitivity to mechanical stability derives from the
specific features of the beamline ID24, more particularly the use of a polychromatic dispersive light that is
focused into a very small spot of 5 microns horizontally. In these geometrical constraints, the acquisition of
absorption spectra under in-situ pulsed magnetic field is challenging because of potential vibrations and motions
induced by the production of the high field pulse, therefore requires excellent sample homogeneity and position
stability within the beam focal spot.
To reduce the observed vibrations effects in the setup, modifications of the cryostat design and mechanical
improvements are under study. The vibrations effects have been already drastically reduced form the initial
configuration (where it was exceeding 1mm) by consolidating cryostat internal tube with the chamber holding
the coil. With this new configuration, XMCD measurements have been successfully performed on a
Gd5Si1.8Ge2.2 powder sample. Data analysis are still under progress.
High magnetic field neutron diffraction
The magnetic properties of geometrically frustrated systems are among the hot topics in condensed matter
physics. In such systems, a variety of unconventional phases appears due to a frustrated spin interaction that
couples with lattice, orbital and charge degrees of freedom. We can tune the balance between them using strong
magnetic field through the Zeeman interaction of spins, and various novel magnetic phases have been found in
magnetic fields exceeding 20 T. Neutron scattering is a powerful and valuable technique to directly determine
the space- and time-correlation of magnetic moments, and to have a deeper insight into the origin of the novel
phases in high fields. So far, however, sufficiently high magnetic fields have not been accessible for neutron
scattering studies. In view of the successful X-ray scattering experiments at the ESRF using a mobile pulsed
field installation, capable of generating fields in excess of 30 T, we have decided to attempt a neutron scattering
experiment using this installation, at the Institut Laue Langevin (ILL, Grenoble) in collaboration with Prof.
Nojiri’s group from Sendai (IMR, Tohoku University, Japan).
Neutron diffraction study of the frustrated antiferromagnet TbB 4[6]
This new technique was used to investigate the magnetic structure of the geometrically frustrated system TbB4,
in magnetic fields up to 30 T. The experiment was carried out on the high-flux, low background triple-axis
spectrometer IN22, with a neutron wavelength of 1.53 Å, using a transportable pulsed magnet system built up by
Prof. Nojiri’s group and the mobile capacitor bank developed at the LNCMI-T
At room temperature, TbB4 crystallizes in the tetragonal structure P4/mbm. The network of magnetic Tb ions
consists of squares and triangles whose configuration within the c-plane is characterized by orthogonal dimers
topologically equivalent to the two dimensional Shastry-Sutherland lattice (SSL) [1]. In zero field, TbB4 exhibits
two successive antiferromagnetic transitions at TN1 = 44 K and TN2 = 24 K [2]. The magnetic structure at B = 0 T
is a XY-type noncollinear structure [3]. At low temperature and high fields (between 16 and 30 T), multi-step
magnetization plateaus appear when the magnetic field is perpendicular to the magnetic easy plane (fig. 4) [4].
This behaviour is unusual since successive metamagnetic transitions in rare earth intermetallics are generally
expected when the field is parallel to the Ising easy axis [5]. Therefore the determination of magnetic structure of
TbB 4 in high magnetic field is essential to understand this phenomenon.
Within the constraints of the pulsed magnet system developed for neutron scattering, we have succeeded in
measuring the field dependences of four Bragg reflections ((100), (200), (110) and (220)) up to 30 T. The
neutron counts and magnetic fields were measured simultaneously using a time analysing system so that the field
dependence of Bragg peaks at fixed diffraction angle can be monitored and recorded as a function of time. The
accumulation of 100-200 magnetic field pulses for each reflection was required to acquire statistically relevant
data. As an example, the field dependence of the intensity of the (100) peak is reported on figure 5. The relative
intensity against the zero field intensity I/I 0 and the relative magnetization M/M S are reported in the figure.
Stepwise changes which can be related to the magnetization process are clearly observed in the intensity of the
magnetic (100) reflection.
From these experimental results, different magnetic models have been calculated. They indicate a much weaker
AF correlation in TbB 4 than the expected one in a conventional antiferromagnet and also suggest the presence of
significant anisotropic interactions. A model introducing a biquadratic interaction term which stabilizes an
36

orthogonal configuration of magnetic moments was proposed to explain the multiple magnetization plateaus.
Further investigations of the magnetic scattering diagram in high fields would be needed to confirm this model.
Nevertheless, these results clearly demonstrate the large potential of pulsed magnetic fields for neutron
diffraction experiments.
Fig. 4: Magnetization of TbB 4 at 4.2 K. Solid line: field
direction is tilted 5 degrees from the c-axis, which
corresponds to this study. The indicated fraction denotes the
ratio M/MS. Inset: magnetic structure at B = 0 T for TN2 < T
< TN1 (solid arrows) and T < T N2 (dashed arrows).
37
Fig. 5: Field dependence of the peak top intensity of (100)
reflection at T = 4.1 K for ascending (open circles) and
descending (closed circles) field. The dashed lines are guide
for eye.
[1] B.S. Shastry and B. Sutherland, Physica B+C 108, 1069 (1981).
[2] Z. Fisk, M.B. Maple, D.C. Johnston, and L.D. Woolf, Solid State Commun. 39, 1189 (1981).
[3] T. Matsumura, D. Okuyama, and Y. Murakami, J. Phys. Soc. Jpn. 76, 015001 (2007).
[4] S. Yoshii, T. Yamamoto, M. Hagiwara, S. Michimura, A. Shigekawa, F. Iga, T. Takabatake, and K. Kindo, Phys. Rev.
Lett. 101, 087202 (2008).
[5] J. Rossat-Mignot, P. Burlet, S. Quezel, J.M. Effantin, D. Delacôte, H. Bartholin, O. Vogt, and D. Ravot, J. Magn. Magn.
Mater. 31-34, 398 (1983).
[6] S. Yoshii, K. Ohoyama, K. Kurosawa, H. Nojiri, M. Matsuda, P. Frings, F. Duc, B. Vignolle, G. L. J. A.
Rikken, L.P. Regnault,S. Michimura, F. Iga, and T. Takabatake Neutron diffraction study on the multiple
magnetization plateaus in TbB4 under pulsed high magnetic field, Phys. Rev. Lett.103, 077203 (2009).
High field neutron diffraction study of the spin Jahn-Teller compound CdCr2O4
More recently, this emerging technique was used to
examine the high magnetic field phase of the spin
Jahn-Teller compound CdCr2O4. The latter is a
highly frustrated spinel antiferromagnet consisted
of frustrated tetrahedra. An unusual halfmagnetization
plateau was found above 28 T,
independently of the field directions [1]. This
phenomenon was attributed to the spin Jahn-Teller
effect where a lattice distortion takes place to lift
the magnetic frustration. With our pulsed field
neutron diffraction experiment, we have succeeded
in following the appearance at high field of
magnetic Bragg reflections, which permits to
distinguish between two possible magnetic
structures at the half plateau.
Fig. 6: Field dependence of the magnetic Bragg
reflection (1 -1 0) at T = 2.2 K for ascending (red circles)
and descending (blue circles) field.
[1] Ueda H., Katori H.A., Mitamura H., Goto T., Takagi H., Hong K.-H, and Park S., Phys. Rev. Lett. 95, 247204 (2005).

Annex 1 ; ‘Hygiene et securité’
List of safety incidents at the LNCMP and the precautions taken.
25/06/2005: Road accident between home and work involving two days sick leave: Cycle accident, elbow
bruised, damage on corrective glasses.
23/11/2006: Work accident involving one day off: Flesh wound on right thumb with haematoma, due to a wrong
move with the dismantling tool of the milling machine. Measure taken: Impose the use of safety gloves.
08/02/2008: Work accident involving one day off; superficial burn on the right hand caused by the manipulation
of a hot product coming out of the oven. Measures taken : Impose the use of safety gloves.
20/05/2008: Accident in workplace without sick leave: Wrong manipulation resulting in projection of irritating
liquidinto right eye. Measure taken: Impose the use of safety gloves and goggles.
Identification, analysis and countermeasures of specific risks in the laboratory
The laboratory has performed a professional risk assessment, available from the security officer (‘ACMO’).
In summary, the mains specific risks are related to the presence of high voltage, the possibility of projectiles
when a magnet fails and the presence of large quantities of liquid nitrogen:
Electrical risk: There are now no longer any galvanic connections between the high voltage circuit of the
magnets and the command posts, but only optical fibres. The liquid nitrogen supply line has also been
galvanicallly decoupled inside the magnet boxes.
Ventilation: Ventilation in the main experimental hall has been improved and oxygen detectors are installed.
Projectiles: Magnets are operated in closed boxes in which no personnel is allowed during a magnet shot.
However the increasing energy of the magnets causes concern about the capabilities of the boxes to stop all
projectiles in the case of a serious coil failure. Within the planned upgrade of the laboratory, new, more strongly
reinforced magnet boxes are foreseen that will eliminate this concern.
Security risks that are specific to any laboratory are:
Fire protection: The ACMO organizes every year evacuation exercises, oven checks, hood checks and warning
system checks. This year, a training “handling of fire extinguishers” had been done for all the staff. Staff doing
welding jobs is equipped with aprons, gloves and safety masks.
Handling risk: lifting devices are controlled every year by APAVE, and are used only by well trained staff.
.
Organisation of the security structures of the laboratory
For assuring the safety rules, the director of the LNCMI is assisted by an ACMO (Agent in Charge of hygiene
and safety). (The number of employees on the Toulouse site isn’t large enough to justify a committee hygiene
and safety.) The ACMO is in contact with the hygiene and safety engineers of the CNRS, the UPS and the
INSA. The CNRS doctor is regularly consulted for example concerning the arrangements of work stations. The
ACMO of the LNCMP drafts the ‘document unique’, executes or organizes the security checks and the periodic
controls. She is in charge of the safety registers, safety equipments, individual protection and equipment,
organizes the first aids, and informs the new arrivals.
Arrangements for staff security training and in particular of new arrivals
Every year, an annual training plan is established by our training correspondent in the laboratory, according to
the laboratory’s needs and the staff requirements. This plan is discussed with the laboratory council which
defines the priorities. These last years, the accent was put on safety trainings and several training sessions were
implemented:
High voltage safety First-aid and rescue
Manipulation of fire extinguishers Laser safety
Competent person for radioprotection Chemical risks
Waste treatment Evacuation guides
When a new collaborator arrives (permanent, PhD student, trainee), he is invited for a visit of the laboratory by
the person in charge, who will indicate the specific laboratory risks and the means of protection, and who will
inform him off the procedures and laboratory rules. A twenty page security manual is given to complete the visit.
This manual summarizes risks, dangers and the different means of prevention.
38

The necessary SPUR (Individual Equipment and protection: coats, overalls, safety footwear, glasses etc.) are
supplied to the staff by the ACMO (for example to work in workshops or specific laboratory rooms)
39

Annex 2 Formation
Les formations suivies, pendant la période 2005-2009, par les personnels du LNCMP étaient en partie
issues d’offres de formation transversales en provenance des 3 tutelles. L’accent a été mis sur le suivi
de cours d’anglais pour les personnels ITA amenés à interagir avec les visiteurs étrangers et sur
l’initiation des chercheurs à l’utilisation des machines-outils (dans le cadre des PFU 2005/2006/2009,
3 sessions de formation ont été mises en oeuvre dans nos locaux). Des formations techniques dans des
domaines spécifiques permettant l’acquisition de connaissances et de compétences nouvelles dans le
but d’accompagner de façon optimale les activités de recherche ont été mises en œuvre soit de façon
individuelle (conception et caractérisation de circuit hyperfréquences, techniques de microbiologie,
langage de programmation, logiciel de CAO/DAO…), soit de façon collective (stage d’électronique
radiofréquence, stage de prise en main pour la fraiseuse à commande numérique suivi d’une formation
au logiciel de programmation ESPRIT, stage d’instrumentation LABVIEW). L’accompagnement des
nouveaux entrants s’effectue par des formations spécifiques à leur activité dans le laboratoire (XLab et
Labintel pour le secrétariat et formation Web pour le gestionnaire réseaux). Des formations à
l’encadrement ont aussi été mises en œuvre (management, conduite de projets…). De plus, des
formations pour améliorer la sécurité au laboratoire ont été suivies par un grand nombre des membres
du LNCMP (SST, conduite des ponts roulants, manipulation des extincteurs). D’autre part, plusieurs
membres du laboratoire appartiennent aux réseaux de métiers (mécaniciens, électroniciens, opticiens,
informaticiens) animés par le CNRS.
Period
Number of training
session
Number of trainees
2005 17 35 (of which 23 ITA)
2006 15 35 (of which 26 ITA)
2007 20 37 (of which 32 ITA)
2008 18 28 (of which 18 ITA)
01/01/2009 - 31/05/2009 7 56 (of which 38 ITA)
Total 77 191 (of which 137 ITA)
40

Annex 3 Enseignement, vulgarisation, organisation de colloques
The LNCMP staff has six ‘enseignants chercheurs’ who teach at UPS and INSA. One of them is also
director of the physics department at INSA, another director of the ‘unité formation & recherche’
Physics, Chemistry and Automation at the UPS. Two of the CNRS ‘chargé de recherche’ teach
voluntarily at the ISAE.
The LNCMP organized each year the ‘journée portes ouvertes’ in the framework of the ‘Fete de la
Science’, and also on other occasions provides tours for interested students and teachers.
During the last four years, the LNCMP has organised three international meetings;
- Narrow gap semiconductors 12 (July 2005, Toulouse)
- Workshop on Synchrotron Applications in High Magnetic Fields (November 2006, Grenoble)
- French-Russian seminar on Sources and Detectors of THz radiation (June 2007, Toulouse)
Furthermore, staff of the LNCMP was involved in the organisation of several national meetings in the
context of GDR, Journées la Matière Condensée etc.
41

Annex 4 Publication list
Publications 2005-2008 /
LNCMP
ACL : Articles dans des revues internationales ou nationales avec comité de lecture
2005-ACL-
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D. Vignolles, A. Audouard, M. Nardone, L. Brossard, S. Bouguessa and J.M. Fabre.
Field-induced spin density wave in (TMTSF)2NO3
Phys. Rev. B 71 020404(R) (2005)
J. Y. Fortin, E. Perez and A. Audouard.
Analytical treatment of the dHvA frequency combinations due to chemical potential
oscillations in an idealized two-band Fermi liquid.
Phys. Rev. B 71 15501 (2005)
D. Hrabovsky, B. Diouf, L. Gabillet, A. Audouard, A. R. Fert and J. F. Bobo.
Exchange anisotropy in Co/NiO bilayers: time-dependent effects
Eur. Phys. J. B 45, 273 (2005).
A. Audouard, D. Vignolles, E. Haanappel, I. Sheikin, R. B. Lyubovskii and R. N.
Lyubovskaya., Magnetic oscillations in a two-dimensional network of compensated
electron and hole orbits. Europhys. Lett. 71 783 (2005).
H. Balaska, J.Dumas, H. Guyot, P. Mallet, J. Marcus, C. Schlenker, J.Y. Veuillen, D.
Vignolles.
Charge density wave properties of the quasi two-dimensional purple molybdenum
bronze KMo6O17. Solid State Sciences 7, 690 (2005)
C. Rizzo and G.L.J.A. Rikken.
Magneto-electro-optical properties of the quantum vacuum and Lorentz invariance.
Physica Scripta 71, C5-8 (2005).
C. Strohm, G.L.J.A. Rikken and P. Wyder.
Phenomenological evidence for the phonon Hall effect.
Phys. Rev. Lett. 95 155901.(2005)
G.L.J.A. Rikken, B. A. van Tiggelen, V. Krstic, G. Wagnière.
Light induced dynamical magnetochiral anisotropy.
Chem. Phys. Lett. 403, 298 (2005).
G.L.J.A. Rikken and P. Wyder.
Magneto-electric anisotropy in diffusive transport.
Phys. Rev. Lett. 94, 016601 (2005)
O.Valiron, L. Peris, G. Rikken, A. Schweitzer, Y.Saoudi, C. Remy and D. Job.
Cellular disorders induced by high magnetic fields.
J.of Mag. Res. Im. 22, 334 (2005)
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C.Ferdeghini, V.Ferrando, C.Tarantini, E.Bellingeri, D.MarrŠ, M.Putti, P.Manfrinetti,
A.Pogrebnyakov, J.M. Redwing, X.X. Xi, R.Felici and E.Haanappel.
Upper Critical Fields up to 60 T in Dirty Magnesium Diboride Thin Films.
IEEE Transactions on Applied Superconductivity 15, 3234 (2005)
V. Braccini, A. Gurevich, J.E. Giencke, M.C. Jewell, C.B. Eom, D.C. Larbalestier, A.
Pogrebnyakov, Y. Cui, B. T. Liu, Y. F.Hu, J. M. Redwing, Qi Li, X.X. Xi, R.K. Singh,
R. Gandikota, J. Kim, B. Wilkens, N. Newman, J. Rowell, B. Moeckly, V. Ferrando, C.
Tarantini, D. Marr‚, M. Putti, C. Ferdeghini, R. Vaglio, and E. Haanappel.
High-field superconductivity in alloyed MgB2 thin films.
Physical Review B 71 012504 (2005).
I. Pallecchi, V. Ferrando, E. Galleani D'Agliano, D. Marr‚, M. Monni, M. Putti, C.
Tarantini, F. Gatti, H.U. Aebersold, E.Lehmann, X.X.Xi, E.Haanappel and
C.Ferdeghini.
Magnetoresistivity in MgB2 as a probe of the transport in σand πbands.
Phys. Rev. B 72 184512 (2005)
R. Klingeler, B. Buchner, M. Hucker, U. Ammerahl, A. Revcolevschi.
Magnetization of hole doped CuO2 spin chains in Sr14-xCaxCu24O41.
Phys. Rev. B 72 184406 (2005)
R. Klingeler, B. Buchner, S-W. Cheong, and M. Hocker.
Weak ferromagnetism of the charge stripes in La5/3Sr1/3NiO4.
Phys. Rev. B. 72 104424 (2005)
G. Federov, B. Lassagne, M. Sagnes, B. Raquet, J.-M. Broto, F.Triozon, S. Roche,
E. Flahaut.Gate-dependent magnetoresistance phenomena in carbon nanotubes.
Phys. Rev. Let. 94, 066801 (2005)
M. Enderle, C. Mukherjee, B. Fak, R. K. Kremer, J.-M. Broto,H. Rosner, S.-L.
Drechsler, J. Richter, J. Malek, A. Prokofiev,W. Assmus, S. Pujol, J.-L. Raggazzoni, H.
Rakoto, M. Rheinstadterand H. M. Rannow.
Quantum helimagnetism of the frustrated spin-1/2 chain LiCuVO4.
Europhys. Lett.70 237 (2005)
S. Diaz, S. de Brion, G. Chouteau, P. Strobel, B. Canals, J. Rodriguez Carvajal, H.
Rakoto and J-M Broto.
Magnetic frustration in the spinel compounds GeNi2O4 and GeCo2O4.
Journal of Applied Physics 97, 10A512 (2005).
J. Gonzalez, O. Contreras, Ch. Power, , E. Calderon, M. Quintero, D. Martinez,Garcia,
V. Munoz San Jose, J. C. Chervin, G. Hamel, E. Snoeck and J. M. Broto.
II-VI and II1-xMnx-VI semiconductor nanocrystals formed by the pressure cycle method.
High Pressure Research 25, 119 (2005)
O. Drachenko, J. Galibert, J. Leotin, J-W. Tomm, M.P Semtsiv, M. Ziegler, S.
Dressler, U. Muller, W-T Masselink.
Electron-optical-phonon interaction in the In/sub 0.73/Ga/sub 0.27/As-AlAs
intersubband laser
Applied Physics Letters 87, 721041 (2005)
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G. Herranz, F.Sanchez, J. Fontcuberta, V. Laukhin, J. Galibert, M-V. Garcia-Cuenca,
C. Ferrater, M. Varela.
Magnetic field effect on quantum corrections to the low-temperature conductivity in
metallic perovskite oxides.
Phys. Rev. B72, 14457 (2005)
D. Serrate, J-M De-Teresa, P-A. Algarabel, R. Fernandez-Pacheco, J. Galibert, M-R.
Ibarra.
Grain-boundary magnetoresistance up to 42 T in cold-pressed Fe/sub 3/O/sub 4/
nanopowders.
Journal-of-Applied-Physics 97, 84317, (2005)
D. Serrate, J-M De-Teresa, P-A Algarabel, M-R Ibarra, J. Galibert.
Intergrain magnetoresistance up to 50 T in the half-metallic (Ba/sub 0.8/Sr/sub 0.2/)/sub
2/FeMoO/sub 6/ double perovskite: spin-glass behavior of the grain boundary.
Phys. Rev. B 71, 104409 (2005)
R. Rosenbaum, J. Galibert.
Transverse magnetoresistance behaviors of thin polycrystalline bismuth films.
J. Low Temperature Physics 138, 1077 (2005)
F. Bielsa, R. Battesti, C. Robillard, G. Bialolenker, G. Bailly, G. Trenec, A. Rizzo and
C. Rizzo.Kerr effect of molecular oxygen at λ=1064 nm. Experiment and theory.
European Phys. J. D 36 , 261 (2005)
C. Proust, K. Behnia, R. Bel, D. Maude, S. I. Vedeneev.
Heat transport in Bi2+xSr2-xCuO6+d: departure from the Wiedemann-Franz
law in the vicinity of the metal-insulator transition.
Physical Review B 72, 214511 (2005)
P. Rochette, P-E Mathé, L. Esteban, H. Rakoto, J-L Bouchez, Q. Liu and J. Torrent
Non-saturation of the defect moment of goethite and fine-grained hematite up to 57 T..
Geophysical Review Letters 32, L22309 (2005).
W. Kang, Y-J. Jo, H. Kang, O-H Chung, D. Vignolles, M. Nardone and A. Audouard,
Study of rapid oscillations in (TMTSF)2FSO3 under pressure and under very high
magnetic fields.
Synthetic Metals 153, 377 (2005)
H. Guyot, J. Dumas, C. Schenker, D. Vignolles.
High magnetic magnetoresistance anomalies in the charge density wave state of the
quasi-two dimensional bronze KMo6O17.
Journal de Phys. IV 131, 261 (2005)
S. Wirth, M. Anane, B. Raquet, S. von Molnar.
Electrical noise as evidence for phase separation in manganites.
J. Mag. Mag. Mat. 290-291, 1168 (2005)
JM Broto, B. Raquet, M. Baibich, M. Costes, H. Rakoto, S. Lambert, A. Maignan
Electronic transport in one-dimensional Ca3Co2O6 single crystal.
Microelectronic Journal 36, 900 (2005).
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O. Contreras, Ch.Power, M. Quintero, M. Morocoima, R. Tovar, E. Quintero, J.
Gonzalez, V. Munoz-San Jose. J. M. Broto and E.Snoeck.
Quantum dots of Cd0.5Mn0.5Te semimagnetic semiconductor formed by the cold
isostatic pressure method.
J. Mag. Mag. Mat. 294, 77 (2005)
M. Costes, J.M. Broto, B. Raquet, H. Rakoto, M.A. Novak, J.P. Sinnecker, S.Soriano,
W.S.D. Folly, A. Maignan, V. Hardy.
Dynamic effects in one dimensional A’3ABO6.
J. Mag. Mag. Mat. 294, 123 (2005)
S. Zaric, G. N. Ostojic, J. Shaver, J. Kono, X. Wei, M. Furis, S. A.Crooker, O.
Portugall, P. Frings, G. L. J. A. Rikken, V. C. Moore, R. H.Hauge, and R. E.
Smalley.
Magneto-optical spectroscopy of carbon nanotubes .
Physica E 29, 469 (2005).
Z.A. Kazei, V.V. Snegirev, J.M. Broto and H. Rakoto.
Jahn-Teller magnet TbVO4 in a strong magnetic field up to 50 T.
JETP Lett. 82, 609 (2005)
J. Vanacken, T. Wambecq, V. Mashkautsan, E. Haanappel, V.V Moshchalkov.
On the presence of 1D-like stripes in superconducting epitaxial La2-xSrCuO4 thin
films.
Journal of Superconductivity 18, 797 (2005)
P. Frings, J. Vanacken, C. Detlefs, F. Duc, J.E. Lorenzo, M. Nardone, J. Billette, A.
Zitouni, W. Bras and G. Rikken.
Synchrotron X-ray powder diffraction studies in pulsed magnetic fields.
Rev. Scient. Instr. 77, 63903 (2006)
R. Klingeler, B. Büchner, K.-Y. Choi, V. Kataev, U. Ammerahl, A. Revcolevschi and
J. Schnack.
Magnetism of hole-doped CuO2 spin chains in Sr14Cu24O41: Experimental and
numerical results.
Phys. Rev. B 73, 014426 (2006)
M. Millot, J. Gonzalez, I. Molina, B. Salas, Z Golacki, JM Broto, H. Rakoto,
M.Goiran.
Raman spectroscopy and magnetic properties of bulk ZnO:Co single crystal.
Journal of Alloys and Compounds 423, 224 (2006)
M.J.R Sandim, D. Stamopoulos, H. R. Z. Sandim, L. Ghivelder, L. Thilly, V. Vidal, F.
Lecouturier, D. Raabe.
Size effects on the magnetic properties of Cu-Nb nanofilamentary processed by severe
plastic deformation.
Superconducting Science and Technology 19 1233 (2006)
P. Sati, R. Hayn, R. Kuzian, S. Shäfer, S. Régnier, A . Stepanov, C. Morhain, C.
Deparis, M. Laügt, M. Goiran, Z. Golacki.
Magnetic anisotropy of Co2+ as signature of intrinsic ferrromagnetism in ZnO:Co.
Phys. Rev. Lett. 96, 017203 (2006).
Sheikin, H. Jin, R. Bel, K. Behnia, C. Proust, J. Flouquet, Y. Matsuda, D. Aoki, and Y.
Onuki.
Evidence for a New Magnetic Field Scale in CeCoIn5.
Phys. Rev. Lett. 96, 077207 (2006)
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L. Thilly, P.O. Renault, V. Vidal, F. Lecouturier, S. Van Petegem, U. Stuhr and H.
Van Swygenhoven.
Plasticity of multi-scale nanofilamentary Cu/Nb composite wire during in-situ neutron
diffraction: co-deformation and size effect.
Applied Physics Letters 88, 191906 (2006)
B.A. Van Tiggelen, G.L.J.A. Rikken and V. Krstic.
Momentum transfer from the quantum vacuum to magneto-electric matter.
Phys. Rev. Lett. 96, 130402 (2006).
S.I. Vedeneev, C. Proust, V.P. Mineev, M. Nardone and G.L.J.A. Rikken.
Reaching the Pauli limit in the cuprate Bi2Sr2CuO6+�in high parallel magnetic fields.
Phys. Rev. B. 73, 014528 (2006)
V. Vidal, L. Thilly, F. Lecouturier, P-O. Renault.
Effects of size and geometry on the plasticity of high strength copper/tantalum
nanofilamentary conductors obtained by severe plastic deformation.
Acta Materiala 54, 1063 (2006)
Zaric. S, G. N. Ostojic, J. Shaver, J. Kono, O. Portugall, P. Frings, G. L. J. A.
Rikken, M. Furis, S. A. Crooker, X. Wei, V. C. Moore, R. H. Hauge and R. E. Smalley.
Excitons in carbon nanotubes with broken time-reversal symmetry.
Phys. Rev. Lett. 96, 016406 (2006)
C. Golze, A. Alfonsov, R. Klingeler, B. Buchner, V. Kataev, C. Mennerich, H-H Klauss
M. Goiran, J-M Broto, H. Rakoto, S. Demeshko, G. Leibeling, F. Meyer Tuning the
magnetic ground state of a tetranuclear nickel(II) molecular complex by high magnetic
fields.
Phys. Rev. B 73, 224403-1-8 (2006)
M. Goiran, M. Costes, J-M Broto, F.C Chou, R. Klingeler, E. Arushanov, S-L.
Drechsler, B. Buchner, V. Kataev.
High-field ESR studies of the quantum spin magnet CaCu/sub 2/O/sub 3/.
New-Journal-of-Physics 8, 74 (2006).
C. Mennerich, H. Klauss, M. Broekelmann, F-J. Litterst, C. Golze, R. Klingeler, V.
Kataev, B. Buchner, S-N. Grossjohann, W. Brenig, M. Goiran, H. Rakoto, J-M.
Broto, O. Kataeva, D-J Price.
Antiferromagnetic dimers of Ni(II) in the S=1 spin-ladder Na/sub 2/Ni/sub 2/(C/sub
2/O/sub 4/)/sub 3/(H/sub 2/O)/sub 2/.
Phys. Rev. B.73, 174415-1-8 (2006)
M.P Semtsiv, S. Dressler, W. T. Masselink,. V. Rylkov, J. Galibert, M. Goiran, J.
Léotin.
Symmetry of the conduction-band minimum in AlP-GaP quantum wells.
Phys. Rev. B 74, 041303(R) (2006)
S. Bonhommeau, G. Molnar, M. Goiran, K. Boukheddaden, A. Bousseksou.Unified
dynamical description of pulsed magnetic field and pressure effects on the spin
crossover phenomenon.
Phys. Rev. B. 74, 64424-1-8 (2006).
D. Vignolles, V. N. Laukhin, A. Audouard, M.Nardone,T. G. Prokhorova, E. B.
Yagubskii and E. Canadell.
Pressure dependence of the Shubnikov-de Haas oscillation spectrum of β"-(BEDT-
TTF)4(NH4)[Cr(C2O4)3].DMF.
Eur. Phys. J. B 51 53 (2006).
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A. Audouard, V. N. Laukhin, J. Béard, D. Vignolles, M.Nardone, T. G. Prokhorova,
E. B. Yagubskii and E. Canadell.
Pressure dependence of Shubnikov-de Haas oscillation spectra in the quasi-twodimensional
organic metal β"-(BEDT-TTF)4(NH4)[Fe(C2O4)3].DMF.
Phys. Rev. B 74, 233104 (2006)
G. Molnár, T. Guillon , N.O Moussa , L. Réchignat , T. Kitazawa , M. Nardone , A.
Bousseksou .
Two-step spin crossover phenomenon under high pressure in the coordination polymer
Fe(3-methylpyridine)2[Ni(CN)4].
Chem. Phys. Lett. 423, 152 (2006).
I. Pallecchi, V. Ferrando, E.G. D'Agliano, D. Marre, M. Monni, M. Putti, C. Tarantini,
F. Gatti, H-U Aebersold, E. Lehmann, X-X Xi, E. Haanappel, C. Ferdeghini.
Magnetoresistivity as a probe of disorder in the pi and sigma bands of MgB2.
Phys. Rev. B 72, 184512 2005. erratum Phys. Rev. B 73 029901 (2006).
J. Shaver, J. Kono, O. Portugall, V. Krstic, G. L. J. A. Rikken, Y. Miyauchi, S.
Maruyama, V. Perebeinos.
Magneto-optical spectroscopy of excitons in carbon nanotubes".
Phys. Stat. sol. (b) 243, 3192 (2006)
S-M. Wasim, L. Essaleh, J. Galibert.
Hall coefficient and Hall mobility in the variable range hopping conduction regime in ntype
CuInSe2.
Mat.-Lett.. 60, 1947 (2006).
B. Pinto Da Souza, R. Battesti, C. Robilliard and C. Rizzo.
P, T violating magneto-electro-optics.
Eur. Phy. J.D 40, 445-452 (2006)
J.T.E. Galindo, J-A. Matutes-Aquino, M. Costes, J-M. Broto.
Coercivity and magnetic viscosity in mechanical milled nanocrystalline YCo5.
J. Appl. Phys. 99, 08B512 (2006).
S. Glocke, A. Klumper, H. Rakoto, J-M. Broto, A.U.B. Wolter, S. Sullow.
S=1/2 antiferromagnetic Heisenberg chain with staggered fields: Copper pyrimidine and
copper benzoate using the density matrix renormalization group for transfer matrices.
Physical Review B 73, 220403 (2006).
B. Lassagne, B. Raquet, J-M. Broto, J-P Cleuziou, T. Ondarcuhu, M. Monthioux, A.
Magrez.
Electronic fluctuations in multi-walled carbon nanotubes.
New Journal of Physics 8, 31 (2006)
Kazei Z.A, V.V. Snegirev, J.M. Broto, H. Rakoto and L.P. Kozeeva.
Magnetic Anomalies Associated with the Tb3+ Level Crossing in YBa2Cu3Ox (x ≈
6.0) in Strong Magnetic Fields up to 50 T.
JETP Letters 84, 8, 441-445 , (2006)
M. Morocoima, M. Quintero, E. Quintero, J. González, R. Tovar, P. Bocaranda, J. Ruiz,
N. Marchán, D. Caldera, E. Calderon, C. Woolley, G. Lamarche, A. M. Lamarche, J.
M. Broto, H. Rakoto, L. D’Onofrio, R. Cadenas.
Magnetic properties of MnGa2Se4 in the temperature range of 2-300K.
Journal of Applied Physics 100, 053907 (2006)
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B. Lassagne, B. Raquet, J.M Broto, J. Gonzales.
Energy dependent transport length scales in strongly diffusive carbon nanotubes.
J. of Phys.: Cond. Matt. 18, 4581 (2006).
K.G. Lusinov, E. Arushanov, B. Raquet, J.M Broto, FC Chou, N. Vizent, G. Behr, J.
Gonzales.
Hopping conductivity in CaCu2O3 single crystals.
J. of Phys.: Cond. Matt. 18, 8541 (2006).
Z.A. Kazei, V.V. Snegirev, J.M. Broto and H. Rakoto.
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Ferromagnetism and lattice distortions in the perovskite YTiO3.
Phys. Rev. B 79, 054431 (2009).
Jaudet C., Audouard A., Levallois J., Vignolles D., Liang R., Bonn D.A., Hardy W.N.
and Proust C. Observation of Sdh and dHvA quantum oscillations in YBa2Cu3O6.51
Physica B, 404 , 354, (2009)
Latyshev YI, Orlov AP, Latyshev AY, Smolovich AM, Monceau Pand Vignolles D.
Recent experiments on interlayer tunneling spectroscopy and transverse electric field
effect in NbSe3.
Physica B, 404, 399 (2009)
Vidal V., Thilly L., Van Petegem S., Stuhr U., Lecouturier F., Renault P-O. and Van
Swygenhoven H.
Plasticity of nanostructured Cu-Nb-based wires: strengthening mechanisms revealed by
in-situ deformation under neutrons. Scripta Mat, vol 60 (2009) 171-174
Thilly L., Van Petegem S., Renault P-O., Lecouturier F., Vidal V., Schmitt B., Van
Swygenhoven H.
A new criterion for the elasto-plastic transition in nanomaterials: application to size and
composite effects on Cu-Nb nanocomposite wires.
Acta Mat, vol 57 (2009) 3157-3169
Jaudet C., Levallois J., Audouard A., Vignolles D., Vignolle B., Liang R., Bonn
D.A., Hardy W.N., Hussey N.E., Taillefer L. and Proust C.
Quantum oscillations in underdoped YBa2Cu3O6.5
Physica B, 404 (2009) 354
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Cooper R.A., Wang Y., Vignolle B., Lipscombe O.J., Hayden S.M., Tanabe Y., Adachi
T., Koike Y., Nohara M., Takagi H., Proust C., Hussey N.E. Anomalous Criticality in
the Electrical Resistivity of La2-xSrxCuO4. Science 323, 603(2009)
Levallois J., Behnia K., Flouquet J., Lejay P. and Proust C. On the destruction of the
hidden order in URu2Si2 by a strong magnetic field.
European Physical Letters 85, 27003 (2009)
Rylkov, A.S. Lagutin, B.A. Aronzon, V.V. Podolskii, V.P. Lesnikov, M. Goiran, J.
Galibert, B. Raquet and J. Leotin.Transport features in laser-plasma deposited
InMnAs layers in strong magnetic fields.
J. Exp.Theo. Phys. 108, 149 (2009)
Bert F., Olariu A., Zorko A., Mendels P., Trombe J.C., Duc F., M.A. de Vries, Harrison
A., Hillier A.D., Lord J., Amato A., Baines C.
Frustrated magnetism in the quantum kagome Herbertsmithite ZnCu3(OH)6Cl2
antiferromagnet
Journal of Physics: Conference Series 145 (2009) 012004.
O. Drachenko, D. Kozlov, V.Aleshkin, V. Ya., Gavrilenko, V. IMaremyanin, K.
VIkonnikov, A. V Zvonkov B. N., Goiran M., Leotin J., Fasching G. Winnerl, S.
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absorption in strained p-InGaAs/GaAs quantum wells. Phys Rev B 79, 073301 (2009)
Rylkov, V. V., Aronzon, B. A., Lagutin, A. S., Podol'skii, V. V., Lesnikov, V. P.,
Goiran, M., Galibert, J., Raquet, B., Leotin, J.
Transport features in laser-plasma-deposited InMnAs layers in strong magnetic fields.
JETP 108, 149-158 (2009)
Vignolles D., Audouard A., Lyubovskii R.B., Nardone M., Canadell E., Zhilyaeva E.I.
and Lyubovskaya R.N.. Shubnikov-de Haas oscillations spectrum of the strongly
correlated quasi-2D organic metal (ET)8[Hg4Cl12(C6H5Br)2] under pressure.
Eur. Phys. J. B 66 , Number 4 / décembre 2008
Vignolles D, Audouard A , Laukhin VN , Nardone M, Canadell E, Spitsina NG,
Yagubskii EB. Magnetic oscillations amplitude of a dirty quasi two-dimensional
organic metal. Synthetic Metals, Volume 158, Issue 21-24, Pages 973-976
S. Yoshii, K. Ohoyama, K. Kurosawa, H. Nojiri, M. Matsuda, P. Frings, F. Duc, B.
Vignolle, G. L. J. A. Rikken, L.P. Regnault,S. Michimura, F. Iga, and T. Takabatake
Neutron diffraction study on the multiple magnetization plateaus in TbB4 under pulsed
high magnetic field, Phys. Rev. Lett.103, 077203 (2009).
G. Quirion, M.L. Plumer, O.A. Petrenko, G. Balakrishnan and C. Proust, Magnetic
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W. Knafo, S. Raymond, P. Lejay, J. Flouquet, Antiferromagnetic criticality at a heavy
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Y. Kopelevich, B. Raquet, M. Goiran, W. Escoffier, R.R. da Silva, J.C. Medina
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A. Devred, B. Fedelich, M. Finn, M. Griepentrog, P. El-Kallassi, F. Lecouturier,
L. Oberli, B. Rehmer, C. Scheuerlein, S. Sgobba, L. Thilly, V. Vidal. Tensile
properties of the individual phases in superconducting multifilament Nb3Sn
wires. Proceedings of ICMC 2006 (International Cryogenic Materials
Conference), 17-20 July 2006, Prague
V. Vidal., L. Thilly, F. Lecouturier.
Elaboration by severe plastic deformation, microstructural and mechanical study
of Cu/X (X =Ta or Nb) nanofilamentary wires for use in high field magnet.
Nanospd3 (3rd International Conference on Nanomaterials by Severe Plastic
Deformation), 22-26 september 2005, Fukuoka (Japan). Materials Science
Forum, vols 503-504 (January 2006) pp. 639-644
Vidal. V, L. Thilly, S. Van Petegem, U. Stuhr, F. Lecouturier, P.O. Renault, H.
Van Swygenhoven.
Size effect in the plasticity of multiscale nanofilamentary Cu/Nb composite wires
during in-situ tensile tests under neutron beam.
Proceedings of MRS 2006 (Materials Research Society conference), 27
novembre- 1 december 2006, Boston (USA)
J. Vanacken, P.Frings, C. Detlefs, F. Duc, J.E Lorenzo, M. Nardone, J. Billette,
A. Zitouni, W. Bras, G.L.J.A. Rikken.
Pulsed magnetic field synchrotron X-ray powder diffraction of the Jahn-Teller
distortion in TbVO4.
Journal of Physics: Conference Series, Vol. 51, pages 475-482 (2006).
YAMADA CONFERENCE LX ON RESEARCH IN HIGH MAGNETIC
FIELDS, 16–19 Août 2006, Sendai Civic Auditorium, Sendai, Japan.
M.P. Semtsiv, S. Dressler, W.T. Masselink, M. Goiran, V.V. Rylkov, J.
Galibert, J. Leotin.
High magnetic fiels study of 2D electron gas in AlP to be published in Int.
Journal Modern Physics B.
B. Lassagne, B. Raquet, J.M. Broto, E. Flahaut, T. Ondarçuhu, C. Vieu, J.
Gonzalez.
Unconventional magneto-transport phenomena in individual carbon nanotubes .
Narow Gap Semiconductor International Conference, NGS12,Toulouse (France)
July 2005. Inst. Phys. Conf. 187, 267 (2006)
J-M. Broto, B. Raquet, B. Lassagne, E. Flahaut, Th.Ondarçuhu, C. Vieu,
J.Gonzalez.
Quantum transport in individual carbon nanotubes under high magnetic field.
NT’05: Sixth International Conference on the Science and Application of
Nanotubes. Gothenburg (Sweden), June 2005
M. Millot, J. Gonzalez, I. Molina, B. Salas, Z. Golacki, J-M. Broto, H. Rakoto,
M. Goiran.
Raman spectroscopy and magnetic properties of bulk ZnO : Co single crystal.
JOURNAL OF ALLOYS AND COMPOUNDS 423 (1-2): 224-227 OCT 26 2006
S. Süllow, A.U.B. Wolter, R. Feyerherm, H. Rakoto, J. M. Broto, S Glocke, A.
Klümper, A. Honecker and W Brenig.
Magnetization of staggered S = 1/2 antiferromagnetic Heisenberg chain systems.
Journal of Physics: Conference Series 51 , 183–186 , (2006)
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X. Chaud, E. Haanappel, J. G. Noudem, D. Horvath.
Trapped field of YBCO single-domain samples using pulse magnetization from
77K to 20K.
8th European Conference on Applied Superconductivity (EUCAS 2007)
C. Detlefs, P. Frings, J. Vanacken, F. Duc, J.E. Lorenzo, M. Nardone, J.
Billette, A. Zitouni, W. Bras, G.L.J.A Rikken.
Synchrotron X-ray Powder Diffraction Studies in Pulsed Magnetic Fields.
AIP Conference Proceedings 879, 1695-1698 (2007)
M. Goiran, J. Galibert, J. Leotin, V.V. Rylkov, M. Semtsiv, O. Bierwagen,
W.T. Masselink.
A THz niche for AlP/GaP quantum wells. Proc 2007 APS March Meeting, Focus
session: « Physics & Technology of III-V Semiconductors in Infrared & THz
Imaging II » March 5-9, 2007 , Denver Colorado USA
M. Goiran, M.P. Semtsiv, S. Dressler, W.T. Masselink, J. Galibert, G. Fedorov,
D. Smirnov, V.V. Rylkov, J. Léotin.
Conduction band states in AlP/GaP quantum wells.
in Proc 13th Int. Conf Narrow Gap Semiconductors « NGS 13 » Guilford UK
July 8th 12th, 2007
S. Hansel, M. Von Ortenberg.
"Transient Fields on Indium Antimonide and Mercury Cadmium Telluride".
28th ICPS, Vienna, 22-26 Juliet 2006, AIP Conf. Proc. *893*, 131 (2007)
V. Kataev, C. Golze, A. Alfonsov, R. Klingeler,B. Büchner, M Goiran, J-M.
Broto, H. Rakoto, C. Mennerich, H-H. Klauss, S. Demeshko, G. Leibeling and
F. Meyer.
Magnetism of a novel tetranuclear nickel(II) cluster in strong magnetic fields.
YAMADA CONFERENCE LX ON RESEARCH IN HIGH MAGNETIC
FIELDS, 16–19 Août 2006, Sendai Japan. Journal of Physics : Conference Series,
Vol.51, pages 351-354 (2006)
V.K. Ksenevich, J. Galibert, V. Kozlov, V.A. Samuilov.
Magnetotransport properties of carbon nanotubes fibers. Proc. Physics, Chemistry
and Applications of Nanostructures « NANOMEETING 2007 » Minsk Belarus
22-25 may 2007, ed by V.F. Borisenko, S.V. Gaponenko, V.S. Gurin pp 262
M.P. Semtsiv, M. Goiran, V. Rylkov, J. Galibert, S. Dressler, W.T. Masselink,
J. Léotin.
Symmetry of the Conduction-band Minima in AlP.
AIP Conference Proceedings, vol. 893, pp. 329–330, 2007.
M.P. Semtsiv, M. Goiran, V. Rylkov, J. Galibert, S. Dressler, W. T. Masselink,
J. Léotin.
Symmetry of the conduction band minima in AlP.
Proceedings of the 28th International conference on the physics of
semiconductors, (ICPS-2006), Vienne , 24-28 Juillet 2006
L. Thilly, V. Vidal, F. Lecouturier.
Plasticity mechanisms in multiscale copper-based nanocomposite wires.
Thermec’2006 (International Conference on Processing & Manufacturing of
Advanced Materials), 4-8July 2006, Vancouver (Canada).
Materials Science Forum, Vols. 539-543 (March 2007), pp814-819
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J. Vanacken J., Detlefs C., Mathon O., Frings P., Duc F., Lorenzo J.E., Nardone
M., Billette J., Zitouni A., Dominguez M.-C., Herczeg J., Bras W.,
Moshchalkov V. V., and Rikken G.L.J.A.
Synchrotron X-ray Powder Diffraction and Absorption. Spectroscopy in Pulsed
Magnetic Fields with Milliseconds Duration. AIP Conference Proceedings 902,
103-106 (2007).
V.I. Gavrilenko, Maremyanin K.V., Ikonnikov A.V., Kozlov D.V., Zvonkov
B.N., Knap W., Goiran M., Drachenko O., Helm M.. Cyclotron resonance of 2D
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Abstr. EOS Annual Meeting 2008, TOM 2: Terahertz – Science and Technology,
Paris 29 September – 2 October 2008 (ISBN 978-3-00-024188-8) 2p.
M. Goiran, Semtsiv M.P., Dressler S., Masselink W.T, Galibert J., Fedorov G.,
Smirnov D., Rylkov V.V., Leotin J. Conduction band states in AlP/GaP
quantum wells. Editor(s): Murdin, BN; Clowes, S Source: NARROW GAP
SEMICONDUCTORS 2007 11961-63 2008 Conference Title: 13th International
Conference on Narrow Gap Semiconductors Conference Date: JUL 08-12, 2007
Conference Location: Guildford, ENGLAN
J. Gonzalez, C. Power, E. Belandria, J. Jorge, F. Gonzalez-Jimenez, M. Millot,
S. Nanot, J-M. Broto, E. Flahaut.
Pressure dependence of Raman modes in DWCNT filled with alpha-Fe, High
Press. Res., 28 (4), 577 (2008) Proceedings of the 46 EHPRG conference.
V.K. Ksenevich, D. Seliuta, Z. Martunas, I. Kasalynas, G. Valusis, J. Galibert,
M.E. Kozlov, V.A Samuilov.
Charge carrier transport properties in single-walled carbon nanotube fibers Proc.
13th Int. Symp. on Ultrafast phenomena in Semiconductors, Vilnius, Lithuania
2007 in Acta Physica Polonica A, 113, 1039 (2008)
Latyshev Yu., Kosakovskaya Z. Ya., Orlov A.P., Latyshev A. Yu, Kolesov V.V,
Monceau P. and Vignolles D.
Nonlinear interlayer transport in the aligned carbon nanotube films and graphite.
Journal of Physics, 129, 2008
C. Mennerich, H.H. Klauss, A.U.B. Wolter, S. Sullow, F.J. Litterst, C. Golze, R.
Klingeler, V. Kataev, B. Buchner, M. Goiran, H. Rakoto, J-M. Broto, O.
Kataeva, D.J. Price.
High field level crossing studies on spin dimers in the low dimensional quantum
spin system Na2T2(C2O4)(3)(H2O)(2) with T = Ni, Co, Fe, Mn. Editor(s):
Barbara, B; Imry, Y; Sawatzky, G; Stamp, PCE Source: QUANTUM
MAGNETISM97-124 2008.
Conference Title: Pacific-Institute-of-Theoretical-Physics Summer School on
Quantum Magnetism Conference Date: JUN, 2006 Conference Location: Les
Houches, France
AFF: Communications par affiche dans un congrès international ou national
2005-AFF-
001
O. Drachenko, B. Bansal, V. Rylkov, V.K. Dixit, J. Galibert, J. Leotin.
InAsSb/GaAs hetero-epitaxial crystals studied by cyclotron resonance
measurements.
Proc. 12th Int. Conf.on Narrow Gap Semiconductors (NGS 12), July 3-7,
Toulouse France, published in the Institute of Physics conference Series.
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L. Essaleh, J. Galibert, S-M. Wasim.
Hall mobility of insulating copper indium diselenide.
Proc. 12th Int. Conf.on Narrow Gap Semiconductors (NGS 12), July 3-7,
Toulouse France, published in the Institute of Physics conference Series.
O. Drachenko, J. Leotin, J. Galibert, C. Sirtori, H. Page, M-P. Semtsiv, M.
Ziegler, S. Dressler, U. Moller, T. Masselink.
Electron-phonon interaction in quantum cascade stuctures probed by Landau
level spectroscopy.
Proc. 12th Int. Conf.on Narrow Gap Semiconductors (NGS 12), July 3-7,
Toulouse France, published in the Institute of Physics conference Series.
B. Lassagne, B. Raquet , J.M. Broto , E. Flahaut , T. Ondarcuhu , C. Vieu , J.
Gonzalez.
Unconventional magneto-transport phenomena in individual carbon nanotubes.
Proc. 12th Int. Conf.on Narrow Gap Semiconductors (NGS 12), July 3-7,
Toulouse France, published in the Institute of Physics conference Series
J. Gonzalez , C. Power , J.M. Broto , B. Raquet , B. Lassagne , P.Puech , E.
Flahaut.
Pressure dependence of Raman modes in DWCNT filled with 1D nanocrystalline
PbI2 Semiconductor.
Proc. 12th Int. Conf.on Narrow Gap Semiconductors (NGS 12), July 3-7,
Toulouse France, published in the Institute of Physics conference Series
V.K. Ksenevich, J. Galibert, L. Forro, V-A. Samuilov.
Magnetotransport in 2-D arrays of single-wall carbon nanotubes.
Proc. of NATO Advanced Study Institute: "Carbon nanotubes; from basic
research to nanotechnology" 21-31 May 2005 Sozopol, Bulgaria. Published in
NATO Science Series: II Mathematics, Physics and Chemistry (Kluwer Acad.
Publ.)
D. Vignolles, Audouard A., Laukhin V.N., Nardone M., Béard J., Canadell E.,
Prokhorova T. and Yagubskii E.
MOLMAT, Toulouse, Juillet 2008. Pressure dependence of the magnetic
oscillation spectra of ET-based molecular metals with tris(oxalate)metalate
anions
Y.U. I. Latyshev, A.P. Orlov, V.A. Volkov, A.V. Irzhak, D. Vignolles, J. Marcus,
T. Furnier.
Interlayer tunneling spectroscopy of Landau levels in graphite. International
Symposium Nanostructure, Vladivostok, July 15–19, 2008
Communications sans actes (COM) :
2006-
COM-001
Sandim. M.J.R, D. Stamopoulos, H. R. Z. Sandim, L. Ghivelder, L. Thilly, V. Vidal, F.
Lecouturier, D. Raabe.
Strain effects on the magnetic properties of Cu-Nb nanofilamentary composites. MRS 2006
(Materials Research Society conference), 27 novembre- 1 december 2006, Boston (USA)
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L.Thilly, V. Vidal, F. Lecouturier, P.O. Renault.
Strain measurements in Cu/Nb wires.
Workshop on strain measurements at POLDI, 10-11/05/2006, Villigen
Vidal. V, F. Lecouturier, L. Thilly, P.O. Renault, S. Van Petegem, U. Stuhr, H. Van
Swygenhoven.
Etude de la co-deformation de conducteurs nanofilamentaires multi-echelles Cu/Nb par
diffraction “in-situ” de neutrons. JMC 10 (10° Journées de la Matière Condensée), 28 août
2006 – 1er septembre, Toulouse
Vidal. V, F. Lecouturier, L. Thilly, P.O. Renault.
Etude de la déformation de conducteurs nanofilamentaires Cu/Nb par diffraction “in-situ”
de neutrons. Plasticité 2006, 27-29 Mars 2006, Annecy
Vidal. V, L. Thilly, P.-O. Renault, F. Lecouturier.
Texture and microstructure evolution during severe plastic deformation of a copper matrix
reinforced by niobium nanotubes: correlation with macroscopic mechanical properties.
MRS 2006 (Materials Research Society conference), 27 novembre- 1 december 2006,
Boston (USA)
J. Dumas, H. Guyot, J. Marcus, C. Schlenker, U. Beierlein, D. Vignolles, M. Kartsovnik,
and I. Sheikin. Recent Development in low dimensional charge density wave conductors,
Skradin, Croatie (29 Juin-3 Juillet 2006). High magnetic field magnetoresistance studies of
the quasi-two dimensional conductors KMo6O17 and (PO2)4(WO3)10.
V. Vidal, L. Thilly, P.-O. Renault, F. Lecouturier.
Texture and microstructure evolution during severe plastic deformation of a copper matrix
reinforced by niobium nanotubes: correlation with macroscopic mechanical properties.
Workshop “Nanomaterials: microstructural and mechanical characterisations, simulations”,
12-13 december 2006, Poitiers
V. Vidal, L. Thilly, S. Van Petegem, U. Stuhr, F. Lecouturier, P.O. Renault, H. Van
Swygenhoven.
Size effect in the plasticity of multiscale nanofilamentary Cu/Nb composite wires during
in-situ tensile tests under neutron beam. Workshop “Nanomaterials: microstructural and
mechanical characterisations, simulations”, 12-13 december 2006, Poitiers
M. Nardone, J-P. Laurent, A. Zitouni.
Cryogenics at the Laboratoire National des Champs Magnétiques Pulsés. Workshop on
synchrotron applications of high magnetic fields. 16-17 Novembre 2006. Grenoble, France.
M. Goiran, J. Galibert, V.V. Rylkov, J. Leotin, M.P. Semtsiv, S. Dressler, W.T.
Masselink, Study of AlP-GaP heterostructures towards green LED applications. 10e
Journées de la matière condensée (JMC 10), Toulouse, France 28 août-1er septembre 2006
V Ya. Aleshkin, Yu.B.Vasilyev, V.I.Gavrilenko, B.N.Zvonkov, A.V.Ikonnikov,
D.V.Kozlov, S.S.Krishtopenko, M.L.Orlov, Yu.G.Sadofyev, K.E.Spirin, M.L.Sadowski,
M.Goiran, W.Knap.
Cyclotron resonance study of 2D electrons and holes in quantizing magnetic fields. Abst.
VIII Russian Conf. Phys. Semiconductors, September 30 - October 5, 2007, Ekaterinburg,
p.194
B.A Aronzon, V.V. Rylkov, A.S. Lagutin, V.V. Podolskii, V.P. Lesnikov, M. Goiran, J.
Galibert, B. Raquet, J. Léotin.
Peculiarities of the transport properties of InMnAs layers in strong magnetic fields.
International Conference “Spin Electronics: Novel Physical Phenomenon and Materials”.
Tbilisi, Georgia, Oct. 22-24, 2007. Abstracts, p.44-45.
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B.A Aronzon, V.V. Rylkov, P.A. Pankov, A.B. Davydov, B.N. Zvonkov, Yu.A. Danilov,
M. Goiran, B. Raquet, A. Lashkul, R. Laiho.
Properties of GaAs/InGaAs/GaAs quantum wells doped with a Mn ��-layer.
International Conference “Spin Electronics: Novel Physical Phenomenon and Materials”.
Tbilisi, Georgia, Oct. 22-24, 2007. Abstracts, p.19-20.
M. Goiran.
Terahertz spectroscopy under high magnetic field. Journées couplées GDR ondes et GDR
THZ, 5-6 Décembre 2006, Montpellier.
M. Goiran, J. Galibert, V. Rylkov, J. Léotin, M. P. Semtsiv, S. Dressler, W. T.
Masselink.
Study of AlP-GaP heterostuctures towards green LED application. JMC 10, Toulouse,
Septembre 2006
M. Goiran, Galibert J., Leotin J., Rylkov V.V., Semtsiv M., Bierwagen O., Masselink
W.T.
A THz niche for AlP/GaP quantum wells . in Proc 2007 APS March Meeting, Focus
session: « Physics & Technology of III-V Semiconductors in Infrared & THz Imaging II »
March 5-9, 2007 , Denver Colorado USA
M. Goiran, M. Costes, J. M. Broto, F. C. Chou , R. Klingeler, E. Arushanov, S.-L.
Drechsler, B. Büchner , V. Kataev.
High-field ESR studies of the quantum spin magnet CaCu2O3. JMC 10, Toulouse, 2006.
M. Goiran, Semtsiv M.P., Dressler S., Masselink W.T., Galibert J., Rylkov V.V., Leotin
J.
THz spectroscopie of the electron subbands in AlP Qws. French Russian seminar « Sources
and Detectors of TeraHertz radiation based on semiconductor nanostructures. » LNCMP
Toulouse 5th and 6th June 2007.
C. Jaudet, D. Vignolles, C. Proust, A. Audouard, J. Flouquet, I. Sheikin, G. Lapertot.
Oscillations de Haas-van Alphen dans le composé à fermions lourds CeCoIn5. GDR
NEEM à Tours 5 au 8 juin 2007
C. Jaudet, D. Vignolles, C. Proust, A. Audouard, J. Flouquet, I. Sheikin, G. Lapertot.
Oscillations de Haas-van Alphen dans le composé à fermions lourds CeCoIn5. Congrès
SFP, Grenoble 2007
C. Jaudet, D. Vignolles, C. Proust, A Audouard.
Systèmes fortement corrélés : diagramme de phase, criticalité et fermiologie. GDR
Nouveau Etat Electronique de la Matière Gif/Yvette 18-19 décembre 2006.
D.V. Kozlov, A.V.Ikonnikov, K.E.Spirin, B.N.Zvonkov, V.I.Gavrilenko, W.Knap,
M.Goiran.
Cyclotron resonance of holes in strained InGaAs/GaAs QW heterostructures in high
magnetic fields. Proc. 15th
Int. Symp. “Nanostructures: Physics and Technology”, Novosibirsk, Russia, June 25-29,
2007; Ioffe Institute, St.Petersburg, 2007, pp.28-29 (ISBN 978-5-93634-022-2).
V. Laukhin, D. Vignolles, A. Audouard, M . Nardone, J. Béard, E. Canadell, T.
Prokhorova, E. Yagubskii.
Pressure effect on magneto/transport properties of BEDT-TTF based molecular metals with
Tris(oxale)metalate anions. ISCOM'97: International Symposium on Crystalline Organic
Metals – Spain (September 2007)
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M.L. Orlov, A.V.Ikonnikov, Yu.B.Vasilyev, S.S.Krishtopenko, D.V.Kozlov,
V.Ya.Aleshkin, Yu.G.Sadofyev, V.I.Gavrilenko, M.L.Sadowski, W.Knap, M.Goiran,
B.N.Zvonkov.
Cyclotron resonance of 2D electrons and holes in high magnetic fields. French-Russian
Seminar "Sources and detectors of terahertz radiation on semiconductor nanostructures".
June 5-6, 2007, LNCMP, Toulouse.
L. Thilly, V. Vidal, P-O Renault, F. Lecouturier, S. Van Petegem, B. Schmitt, H. Van
Swygenhoven.
Déformation in-situ de composites nanofilamentaires Cu/Nb: effet Bauschinger et stockage
des dislocations. Colloque Plasticité 2007, 19-21 Mars 2007, Futuroscope
L. Thilly, V. Vidal, P-O Renault, F. Lecouturier, S. Van Petegem, B. Schmitt, H. Van
Swygenhoven.
Plasticity of nanocomposite wires during in-situ tensile tests under neutrons and X-rays:
Bauschinger effect, size effect and dislocation storage. International workshop on small
scale plasticity:, 5-8 september 2007, Braunwald (Switzerland)
V. Vidal, L. Thilly, F. Lecouturier, P-O Renault, S Van Petegem and H. Van
Swygenhoven.
High Strength Cu/Nb Nanocomposite Wires Processed by Severe Plastic Deformation:
Effects of Size and Composite Structure on Mechanical Properties. MRS 2007
( Materials Research Society conference), 26-30 november 2007, Boston (USA)
V. Vidal, L. Thilly, S. Van Petegem, U. Stuhr, F. Lecouturier, P.O. Renault, H. Van
Swygenhoven.
Size effect in the plasticity of multiscale nanofilamentary Cu/Nb composite wires during
in-situ tensile tests under neutron beam. ECNS 2007 (4th European Conference on Neutron
Scattering), 25-29 june 2007, Lund (Sweden)
V. Vidal, L. Thilly, S. Van Petegem, U. Stuhr, F. Lecouturier, P.O. Renault, H. Van
Swygenhoven.
Size effect in the plasticity of multiscale nanofilamentary Cu/Nb composite wires during
in-situ tensile tests under neutron beam.
EUROMAT 2007, 10-13 September 2007, Nurnberg (Germany)
J-B. Dubois, Thilly L., Renault P.O., Van Petegem S., Van Swygenhoven H., Vidal V.,
Lecouturier F.
Texture evolution during severe plastic deformation and heat treatments of a copper matrix
reinforced by niobium nanotubes. Workshop “Nanomaterials: microstructural and
mechanical characterisations, simulations”, 11-12 december 2008, Rouen
J-B. Dubois, Thilly L., Renault P.O., Vidal V., Lecouturier F.
Evolution de la texture au cours de la déformation plastique sévère de conducteurs
nanofilamentaires Cu-Nb : interactions avec la nanostructure. Journée SF2M Ouest 2008,
"Effets d'échelle sur les propriétés des matériaux: du macro au nano", Futuroscope, 27
mars 2008
J-B. Dubois, Vidal V., Thilly L., Lecouturier F., Renault P.O.
Journée SF2M Ouest 2008. Effets d'échelle sur les propriétés des matériaux: du macro au
nano, Futuroscope, 27 mars 2008. Evolution de la texture au cours de la déformation
plastique sévère de conducteurs nanofilamentaires Cu-Nb : interactions avec la
nanostructure.
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2008-COM-
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2008-COM-
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J-B. Dubois, Vidal V., Thilly T., Renault P.O., Van Petegem S., Stuhr U., Van
Swygenhoven H., Lecouturier F.
Texture evolution during severe plastic deformation and residual stresses at low and high
temperature of a copper matrix reinforced by niobium nanotubes.
ICRS 2008, the Eighth International Conference on Residual Stresses 6-8 August 2008,
Denver, Colorado, U.S.A.
F. Duc.
Etude par diffraction des rayons X sous champs magnétiques pulsés du manganite
Ca0.8Sm0.16Nd0.04MnO3. GDR Matériaux et Interaction en Compétition (GDR Mico
3183), Autrans, 1-4 Décembre, 2008
W. Escoffier, Raquet B., Nanot S.
Electronic states of carbon nanotube under magnetic field, 1er Workshop Tohuku
University - EMAC – INSA, Albi December 2008.
W. Escofier, Poumirol J-M., Yang R., Goiran M., Raquet B., Broto J-M.
Gate voltage tuning of charge carrier dynamics in few layer grapheme. International
workshop on Semiconductors and carbon-based nanostructures in magnetic fields,
Grenoble, November 2008.
P. Frings.
Journées LCMI 2008, 15-16 mai 2008. Générateurs et bobines pour les champs
magnétiques pulsés.
J. Gonzalez, Power Ch., Belandria E., Jorge J., Gonzales F., Broto J-M., Flahaut E.
Temperature dependence of Raman modes in DWCNTs filled with 1D nanocrystalline
alpha-Fe, NT08, Montpellier June 2008.
V.K. Ksenevich, Dauzhenka TA., Galibert J., Samuilov VA. High field magnetotransport
in Carbon nanotubes monolayers and thick films. MOLMAT 2008, 3rd International
symposium on Molecular Materials based on Chemistry, Solid State Physics, Theory and
Nanotechnology. Toulouse juillet 2008.
M. Millot.
High pressure and high magnetic field behavior of free and donor-bound exciton
photoluminescence in InSe. HPSP-13, Fortaleza, Brazil, July 2008.
M. Millot.
New Diamond Anvil Cell for optical and transport measurements under high magnetic
fields up to 60 T, 46th EHPRG, Valencia, Spain, September 2008.
S. Nanot, Escoffier W., Broto J-M., Avriller R., Roche S., Raquet B.
Mise en évidence expérimentale des niveaux de Landau dans les nanotubes de carbone,
GdR Physique Mésoscopique, Aussois, december 2008.
S. Nanot, Escoffier W., Broto J-M., Raquet B.
Tuning of the electronic band structure and the conductance of semiconducting CNTs
under high magnetic field,. NT08, Montpellier June 2008.
64

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2008-COM-
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2008-COM-
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2008-COM-
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2008-COM-
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2008-COM-
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2008-COM-
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O. Portugall.
Journées LCMI 2008, 15-16 mai 2008.
Physics beyond 100 T.
J-M. Poumirol, Escoffier W., Goiran M., Raquet B., Novoselov K.
Quantum hall effect in thin graphite under pulsed magnetic field. GdR Physique
Mésoscopique, Aussois, december 2008
C. Proust.
Fermi surface of underdoped cuprates revealed by quantum oscillations and Hall effect.
ECRYS 2008, Cargèse, France (Août 2008)
C. Proust.
Fermi surface of underdoped cuprates revealed by quantum oscillations and Hall effect".
March meeting, New Orleans, Etats-unis (Mars 2008)
C. Proust.
Fermi surface of underdoped cuprates revealed by quantum oscillations and Hall effect.
Meeting de la société Suisse de Physique, Genève, Suisse (Mars 2008)
C. Proust.
Fermi surface of underdoped cuprates revealed by quantum oscillations and Hall effect.
Physical Phenomena in High Magnetic Fields, Tallinn, Estonie (Juillet 2008)
C. Proust.
Fermi surface of underdoped cuprates revealed by quantum oscillations
and Hall effect. Correlated Electron Systems in High Magnetic Fields, Dresden, Allemagne
(Octobre 2008) communication invitée
C. Proust.
Fermi surface of cuprates: What quantum oscillations can teach us ?
ICAM Workshop on Cuprate Fermiology, Maryland, USA (novembre 2008)
C. Proust.
Quantum oscillations in cuprates "Canadian Institute for Advanced Research" meeting of
the Quantum Materials Program, Vancouver, Canada (novembre 2008)
B. Raquet.
Journées LCMI 2008, 15-16 mai 2008. Magneto-transport in nano-objects.
Raquet B., Avriller R., Lassagne B., Nanot S., Escoffier W., Broto J-M., Roche S.
Landau Level Formation in Carbon Nanotubes-Based Electronic Fabry-Perot Resonators –
exploration under 60T,. NT08, Montpellier June 2008.
Raquet B., Nanot S., Escoffier W., Broto J-M., Avriller R., Roche S.
Tuning the electronic states of carbon nanotube based devices under magnetic field,
ElecMol08, Grenoble, december 2008.
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2008-COM-
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2008-COM-
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2008-COM-
065
2008-COM-
066
2009-
COM-001
G.L.J.A. Rikken.
Journées LCMI 2008, 15-16 mai 2008. Le LNCMP et le LNCMI : perspectives nationales
et européennes.
L. Thilly, Lecouturier F., Renault P.O., Van Swygenhoven H.
Plasticité 2008, 10-12 Mars 2008, Nancy. Plasticité des fils nanocomposites Cu/Nb
hyperdéformés : simulations et déformations in-situ sous neutrons et rayons X.
Thilly L., Lecouturier F., Renault P.O.
GDR MECANO, Premier atelier, Marseille 13-14 mars 2008.
Plasticité des fils nanocomposites Cu/Nb hyper-déformés: apports de la déformation in-situ
sous neutrons et rayonnement synchrotron.
Thilly L., Renault P.O., Van Petegem S., Van Swygenhoven H., Vidal V., Lecouturier F.
Déformation in-situ de composites nanofilamentaires Cu/Nb: effet Bauschinger et stockage
des dislocations. Journée SF2M Ouest 2008. Effets d'échelle sur les propriétés des
matériaux: du macro au nano, Futuroscope, 27 mars 2008
Thilly L., Renault P.O., Vidal V., Dubois J-B., Van Petegem S., Van Swygenhoven H.,
Lecouturier F.
Plasticity of nanocomposite wires during in-situ tensile tests under X-rays: size and
composite effects on the elasto-plastic transition. International Workshop on the Plasticity
of Nanocrystalline Metals, 28/09-01/10/2008, Lake Bostal, Germany
L. Thilly, Renault P.O., Vidal V., Van Petegem S., Van Swygenhoven H. and Lecouturier
F.
Plasticity of nanocomposite wires during in-situ tensile tests under X-rays: size effect,
Bauschinger effect and dislocation storage.
Dislocations 2008, 13-17 October 2008, Hong Kong
L. Thilly, Renault P.O., Vidal V., Van Petegem S., Van Swygenhoven H., Lecouturier F.
The Bauschinger effect in nanofilamentary Cu/Nb wires evidenced by in-situ tensile tests
under synchrotron radiation. ICRS 2008, the Eighth International Conference on Residual
Stresses 6-8 August 2008, Denver, Colorado, U.S.A.
V.Vidal, Dubois J.B., Thilly L., Lecouturier F., Renault P.O.
GDR MECANO, Premier atelier, Marseille 13-14 mars 2008. Déformation plastique
sévère appliquée à une matrice de cuivre renforcée par des nanotubes de niobium:
évolution de la texture et de la microstructure, corrélation avec les propriétés mécaniques.
V. Vidal, Thilly L., Renault P.O., Stuhr U., Van Petegem S., Lecouturier F., Van
Swygenhoven H.
Size effect in the plasticity of multiscale nanofilamentary Cu/Nb composite wires during
in-situ tensile tests under neutron . ICRS 2008, the Eighth International Conference on
Residual Stresses 6-8 August 2008, Denver, Colorado, U.S.A
Galibert -J.
« Systèmes désordonnés, Toulouse »
Journées du L N C M I 8-9 juin 2009 La Grande Motte ,France
Conférence invitées (INV) :
66

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2006-INV-
008
2006-INV-
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2006-INV-
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V. Vidal, L. Thilly, F. Lecouturier.
Nanostructuration par déformation plastique intense : relation microstructure /
propriétés mécaniques dans des conducteurs nanofilamentaires à base de Cu
Colloque Plasticité 2005, La Rochelle, 11-13 avril 2005
F. Lecouturier , V. Vidal.
Elaboration by severe plastic deformation, microstructural and mechanical study
of Cu/X (X =Ta or Nb) nanofilamentary wires for use in high field pulsed magnet.
CERN AT/MAS (Accelerator Technology/Magnets and Superconductors), 22
février 2006, Genève
L. Thilly, V. Vidal, F. Lecouturier.
Plasticity mechanisms in multiscale copper-based nanocomposite wires.
Thermec’2006 (International Conference on Processing & Manufacturing of
Advanced Materials), 4-8July 2006, Vancouver (Canada).
Materials Science Forum, Vols. 539-543 (March 2007), pp814-819
O. Portugall et al.
Magneto spectroscopy of single-walled carbon nanotubes.
17th International Conference on High Magnetic Fields in Semiconductor
Physics, Wuerzburg 2006
O. Portugall et al.
Towards 100T - European activities in the development of non-destructive pulsed
magnets.
Megagauss XI, London 2006
The LNCMP-team.
The Toulouse pulsed magnet facility.
International Conference on Research in High Magnetic Fields, Sendai 2006
S. Nanot, W. Escoffier, B. Raquet, B. Lassagne, JP Cleuziou, R. Avrillé, S.
Roche, J-M. Broto, High magnetic field magneto-conductance in individual
carbon nanotubes GDR-E “Science and Application of carbon nanotubes”
(Obernai), Octobre 2006.
B. Raquet, B. Lassagne, S. Nanot, JP Cleuziou, JM Broto.
Bruit électronique dans les nanotubes de carbone individuels.
JMC10, Toulouse, aôut 2006.
B. Lassagne, S. Nanot, R. Avrillé, S. Roche, B. Raquet, J-M Broto.
Magneto-transport dans les nanotubes de carbone individuels.
JMC10, Toulouse, aôut 2006.
B. Raquet, B. Lassagne, JP Cleuziou, JM Broto.
Resistance fluctuations in multi-wall carbon nanotubes.
International Conference on Synthetic Metals, ICMS 2006, Dublin, July 2006.
B. Lassagne, B. Raquet, JM Broto.
Electronic transport in individual carbon nanotubes GDR-E “Science and
Application of carbon nanotubes” (Houffalize, Belgium), october 2005.
B. Raquet, B. Lassagne, JM Broto.
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2006-INV-
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2006-INV-
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2006-INV-
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2006-INV-
017
2007-INV-
018
2007-INV-
019
2007-INV-
020
2007-INV-
021
2007-INV-
022
2007-INV-
023
2007-INV-
024
Electronic fluctuations in individual multiwall carbon nanotubes GDR-E “Science
and Application of carbon nanotubes” (Houffalize, Belgium), october 2005.
G.L.J.A. Rikken.
Magneto-optics and symmetry; WAVES2006, IMCODE Summer School,
Cargèse 12-16 june 2006.
G.L.J.A. Rikken.
Magnéto-optique, JMC 10 Toulouse, 29-31 august 2006.
F. Duc.
Pulsed magnetic fields at the ESRF : first results, Synchrotron Application of
High Magnetic Fields, Grenoble 16-17 november 2006.
C. Proust, L. Taillefer, N. Doiron-Leyraud, M. Sutherland, D. LeBoeuf,
J.Levallois, M. Nardone, H. Zhang, N. Hussey, S. Adachi, R. Liang, D.A.Bonn,
W.N. Hardy.
“Metallic ground state in underdoped YBa2Cu3Oy”, Materials and Mechanisms
of Super-conductivity and High Temperature Superconductors, Dresde,
Allemagne, (juillet 2006).
C. Proust, L. Taillefer, M. Sutherland, J. Levallois, N. Doiron-Leyraud.
Magnétotransport sous champ intense dans la phase sous-dopée de YBa2Cu3Oy,
Réunion Supraconducteur du GDR NEEM, Saclay (décembre 2006).
S. Batut, J. Mauchain, R. Battesti, C. Robilliard, M. Fouché, and O. Portugall.
A Transportable Pulsed Magnet System for Fundamental Investigations in
Quantum Electrodynamics and Particle Physics.
IEEE Transactions on applied superconductivity.
F. Duc, K. Chesnel, C. Detlefs, P. Frings, J. Vanacken, O. Mathon, J.E. Lorenzo,
M. Nardone, J. Billette, A. Zitouni, W. Bras, G.L.J.A. Rikken.
X-ray powder diffraction and absorption experiments under pulsed magnetic
fields up to 30T.
E-MRS Fall Meeting 2007, 17-21 Septembre 2007, Varsovie, Pologne.
J. Galibert.
« Some aspects of nanophysics in Toulouse » .
Conference at Institute for Nuclear Problems Belarus State University, Minsk,
Belarus may 2007
M. Goiran.
Terahertz spectroscopy under high magnetic field.
ESRF workshop on “TeraHertz Dynamics probed with X-rays”. ESRF, Grenoble,
10-11-12 September 2007.
S. Hansel, M. Von Ortenberg, O. Portugall, G. Rikken.
"The Single Turn Coil Generator, Toulouse / Berlin, a user magnet for
EuroMagNET", presentation orale invite.
Summer School "Trends in High Magnetic Field Science" 29.8.07-8.9.07 Cargese,
France
S. Hansel, M. Von Ortenberg, A. Kirste, B. Richter, O. Portugall, G. Rikken, F.
Durantel.
"MegaGauss @ EuroMagNET", presentation orale invité.
EuroMagNET User Meeting, 22./23.10.2007 Nijmegen, Pays-Bas
Yu. I. Latyshev, A.P. Orlov, P. Monceau, Th. Fournier, E. Mossang, D. Vignolles.
Enhancement of Peierls transition temperature in NbSe3 by high magnetic field.
International School, "Magnetic field for science" – Août 2007
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2007-INV-
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2007-INV-
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2007-INV-
032
2007-INV-
033
2007-INV-
034
2007-INV-
035
2007-INV-
036
2007-INV-
026
C. Proust.
« La surface de Fermi des supraconducteurs à haute température critique ».
invitation du comité local de la Société Française de Physique à Toulouse (octobre
2007)
C. Proust, J. Levallois, N. Doiron-Leyraud, , D. LeBoeuf, N.E. Hussey , R.
Liang, D.A. Bonn, W.N. Hardy, L. Taillefer, " Fermi surface of underdoped
cuprate revealed by quantum oscillations and Hall effect".
"Canadian Institute for Advanced Research" meeting of the Quantum Materials
Program, Montréal, Canada (octobre 2007)
C. Proust, N. Doiron-Leyraud, , D. LeBoeuf, J. Levallois, J-B Bonnemaison, R.
Liang, D.A. Bonn, W.N. Hardy, Louis Taillefer.
Quantum oscillations and Fermi surface in YBa2Cu3O6.5. "Exploring Quantum
Matter: Visions and Opportunities", St Andrews, Ecosse (juillet 2007)
B. Raquet.
Aharonov-Bohm conductance modulation in Ballistic Carbon Nanotubes,
International Winter School on the Electronic Properties of Novel Materials.
IWEPNM2007, Kirchberg – Autriche Mars 2007
G.L.J.A Rikken.
Light scattering in magnetic fields, IMCODE Council meeting, Grenoble
20/12/2007
G.L.J.A Rikken.
Magnetic fields and chirality; 'Chirality at the Nanoscale', Sitges17-21 september
2007
G.L.J.A Rikken.
Magneto-optics and symmetry; EuroMagNET School, Cargèse 27 August-7
september 2007
G.L.J.A Rikken.
Magneto-optics and symmetry; invited to INLN, Nice 14 december 2007
C. Proust, J. Levallois, N. Doiron-Leyraud, , D. LeBoeuf, N.E. Hussey, R.Liang,
D.A. Bonn, W.N. Hardy, L. Taillefer.
Fermi surface of underdoped cuprate revealed by quantum oscillations and Hall
effect, invited to the workshop on Properties on High Tc superconductors,
Munich, 17-18 dec 2007
J. Levallois, N. Doiron-Leyraud, C. Proust, D. LeBoeuf, J-B Bonnemaison, R.
Liang, D.A. Bonn, W.N. Hardy, L. Taillefer.
Surface de Fermi révélée par des oscillations quantiques dans YBa2Cu306.5.
GDR NEEM, Tours 5 au 8 juin 2007
J. Levallois, C. Proust, N. Doiron-Leyraud , D. LeBoeuf, N.E. Hussey , R.
Liang, D.A. Bonn, W.N. Hardy, L. Taillefer.
Quantum oscillations and the Fermi surface in underdoped high-Tc
superconductors.
"EuroMagNET Summer School, Cargèse 27 August-7 september 2007"
T.A Dauzhenka, VK. Ksenevich, I.A. Bashmakov, J. Galibert.
69

2008-INV-
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2008-INV-
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2008-INV-
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2008-INV-
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2008-INV-
041
2008-INV-
042
2008-INV-
043
2008-INV-
044
2008-INV-
045
2008-INV-
046
2008-INV-
047
2008-INV-
048
Quantum interference effect and the problem of localization phenomena in SnO2
granular films.
GDR Physique Quantique Mésoscopique Réunion plénière Aussois 8-11
décembre 2008
F. Duc.
Synchrotron X-ray Experiments in Pulsed Magnetic Fields.
ESRF Users’Meeting, Grenoble, France, February 5-7, 2008
O. Mathon, P. Van der Linden, M. Sikora, C. Strohm, K. Chesnel, F. Duc, S.
Pascarelli S.
XMCD Under Pulsed Magnetic Field Up To 30 Tesla And Low Temperature
Down To 10 K. APS Users’Meeting, Argonne National Laboratory, Chicago,
May 4-8, 2008
M. Millot.
Photoluminescence under high pressure and high magnetic field. DCITIMAC.
Universidad de Cantabria, Santander, Spain, October 2008.
M. Millot.
Photoluminescence under high pressure and high magnetic field.
Ecole Normale Supérieure, Lyon, France, November 2008.
M. Millot.
Photoluminescence under high pressure and high magnetic field.
Grenoble High Magnetic Field Laboratory, Grenoble, France, May 2008.
M. Millot.
Physics under pulsed magnetic field up to 60 T.
Universidad Federal do Ceara, Fortaleza, Brazil, July 2008.
O. Portugall.
General overview over investigations on low-dimensional carbon-based materials
in magnetic fields above 50 T.
18th Int. Conf. on High Magnetic Fields in Semiconductor Physics. Estancia de
Sao Pedro, Brazil, 3.-8.8.2008
C. Proust.
invited speaker. APS March Meeting New Orleans (march 2008).
Fermi surface of underdoped cuprates revealed by quantum oscillations and Hall
effect.
C. Proust.
invited speaker. Swiss Physical Society meeting, Genève (march 2008).
Fermi surface of underdoped cuprates revealed by quantum oscillations and Hall
effect.
G.L.J.A Rikken.
Big news from big machines, magnetism in high magnetic fields, invited to
JEMS08, Dublin 17/09/08
G.L.J.A Rikken.
High magnetic field facilities in Europe, invited to Physique en champ intense,
SFP colloque 24/10/2008
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2008-INV-
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2008-INV-
050
L. Thilly, F. Lecouturier, P.O. Renault, H. Van Swygenhoven.
Plasticité des fils nanocomposites CuNb hyperdéformés : simulation et
déformation in-situ sous neutrons et RX.
Colloque Plasticité 2008, 10-12 Mars 2008, Nancy
L. Thilly, R. Maass, M. Legros, S. Van Petegem, P.O. Renault, V. Vidal, J-B.
Dubois, F. Lecouturier, H. Van Swygenhoven.
Elasto-plastic Transition in High Strength Nanocomposite Wires and Composite
Micro-pillars Studied by In-situ Deformation under X-rays. MRS 2008 (Materials
Research Society conference), 1-5 december 2008, Boston (USA)
Ouvrages Scientifiques (OS) :
2006-OS-
001
2008-OS-
004
2008-OS-
005
2008-OS-
006
F. Lecouturier.
Conducteurs nanocomposites multi-échelle ultra renforcés pour bobines de
champ magnétique pulsé non-destructif supérieur à 60T. Les nanosciences 2 :
Nanomatériaux et nanochimie, éditions Belin, collections Echelles (2006),
Lahmani (Marcel) / Bréchignac (Catherine) / Houdy (Philippe)
R. Battesti, Beltrán B., Davoudiasl H., Kuster M., Pugnat P., Rabadan R.,
Ringwald A., Spooner N., Zioutas K.
in Axions - Theory, Cosmology and Experimental Searches. Lect. Notes Phys.
741, Editors : M. Kuster, G. Raffelt, B. Beltrán, 199-237 (2008)
[physics/0702188]
F. Lecouturier, Thilly L.
Applications of nanomaterials: mechanics : high field coils. Nanomaterials
and nanochemistry, Springer editions, Lahmani (Marcel) / Bréchignac
(Catherine) / Houdy (Philippe), (Feb 2008)
M. Sandim, Sandim H.R.Z, Ghivelder L., Thilly L., Lecouturier F.,
Stamopoulos D.
Superconductivity and magnetic properties of multifilamentary Cu-Nb
micro/nano composite wires. Magnetism and Superconductivity in low
dimensional systems: Utilization in Biotechnological and Engineering
Applications, published by NOVA Science, New York
(www.novapublishers.com), edited by Dimosthenis Stamopoulos (2008)
71

Annexe 5 Organigramme 1/4/2009
Conducteurs renforcés
F. Lecouturier IR
N. Ferreira AJT
J. M. Lagarrigue T
Bobines & Generateur
P. Frings IR
J. Billette IE
F. Giquel T
J. Béard IE CDD ANR
B. Griffe AI
Soutien général
G. Ballon AI échantillons
L. Drigo. IE électronique
L. Bosseaux T informatique
J.P. Nicolin IE CDD EMII
S. George T optique
J. Mauchain CDD IE BMV
F. Durantel IE MegaGauss
Vacature IR CDD
Mécanique
L. Bendichou T
T. Schiavo AJT UPS
J.C. Desclaux CDD AI
Directeur
G.Rikken DR1
Directeur-adjoint
O. Portugall IR
Secrétariat-Administration
F. Moes T
S. Bories AJT INSA
A. Labrador, AJT CDD EMII
C.Feugeade IE 50 % EMII
Cryogénie Vide Pression
M. Nardone IR
J.P. Laurent T INSA
A. Zitouni AI
J. Delescluse CDD T
Thésards
C. Jaudet UPS
S. Nanot UPS
N. Ubrig UPS
M. Millot UPS
J.B. Dubois (Poitiers)
J. Jorge UPS-Merida
P.Y. Solage UPS
J. Poumirol UPS
T. Dauzhenko UPS-Minsk
72
(Enseignants)-Chercheurs
A. Audouard CR1
R. Battesti MC UPS
J.M. Broto PR UPS
F. Duc CR1
W. Escoffier MC INSA
J. Galibert CR1
M. Goiran PR UPS
W. Knafo CR2
B. Raquet PR INSA
C. Proust CR1
D. Vignolles MC INSA
Accueil BMV-LCAR
C. Rizzo PR UPS
M. Fouché CR2
Post-docs
E. Klein FFC CNRS
B. Vignolle FFC CNRS
Vacature RMN-ANR
A. Kumar Graphene-ANR

GRENOBLE HIGH MAGNETIC FIELD LABORATORY
LABORATOIRE DES CHAMPS MAGNÉTIQUES INTENSES
Sous la tutelle du Le LNCMI est une unité propre (UPR 5021)
du CNRS conventionnée avec l’Université Joseph Fourier
BILAN SCIENTIFIQUE
Laboratoire des Champs Magnétiques Intenses
LCMI – UPR 5021
Du 01/01/2005 au 31/12/08
Etablissement de rattachement : CNRS – MPPU
Lié par convention à l’Université Joseph Fourier – Grenoble 1
A partir du 01/01/09 :
Laboratoire National des Champs Magnétiques Intenses
LNCMI – UPR 3228
Etablissement de rattachement : CNRS – MPPU
Lié par convention à l’Université Paul Sabatier Toulouse 3, à l’Université Joseph Fourier Grenoble 1
et à l’INSA Toulouse
AERES
Campagne d’évaluation 2011 - 2014
LCMI / CNRS
25 rue des Martyrs - B.P. 166
38042 GRENOBLE CEDEX 9 – France
Tél. : +33 (0)4 76 88 10 48
Fax : +33 (0)4 76 88 10 01
http://lncmi.cnrs.fr/

Summary
Genereal overview of the LCMI 2005-2009 .................................................................................................1
Scientific Activities .......................................................................................................................................5
Publications .................................................................................................................................................23
ACL.................................................................................................................................................23
ACTI ...............................................................................................................................................48
ACLN..............................................................................................................................................67
INV .................................................................................................................................................70
COM ...............................................................................................................................................75
AFF .................................................................................................................................................81
OS, AP ............................................................................................................................................86
Prix, distinctions, colloques ............................................................................................................87
Organigramme.............................................................................................................................................89
Annexe 1 : Enseignement et formation par la recherche, information et culture scient. et tech. ................91
Annexe 2 : Action de formation permanente des personnels de l’unité ......................................................93
Annexe 3 : Hygiène et sécurité....................................................................................................................95

General overview of the LCMI 2005-2009
Short history
The Laboratoire des Champs Magnétiques Intenses (LCMI), was a "Unité Propre du CNRS, UPR 5021"
associated with the University Joseph Fourier, UJF, and the Institut National Polytechnique, INP Grenoble. It
belongs to the "Très Grands Equipements" of the CNRS since 2005 and depends primarily on the MPPU
department of the CNRS, with a secondary attachment to the CNRS Chemistry department.
At its creation in 1972, the laboratory was operating as a "service". It was named "Service National des
Champs Intenses" (SNCI) and a collaboration started with the Max-Plank-Institut für Festkörperforschung
(MPI-FKF) in Stuttgart for both research and magnet development. In 1990/91, most of the technical
installations were renewed, and the dc electric power and cooling capacity were increased from 10 to 24
MW. From 1992 a common laboratory, the LCMI, or Grenoble High Magnetic Field Laboratory (GHMFL),
has been operated by the CNRS and the Max-Planck-Gesellschaft through the MPI-FKF in Stuttgart. This
partnership extended to the end of 2004. From 2002 to the end of 2005 Gérard Martinez was director and he
insured the transition to the new state of the laboratory in 2005. His successor was Jean-Louis Tholence, who
directed the laboratory until end 2008. On 1/1/2009, the LCMI was merged with the Laboratoire National
des Champs Magnétiques Pulsés in Toulouse (LNCMP), under the directorship of Geert Rikken.
This report starts in 2005, when the status of "Très Grand Equipement" (TGE) was given to the laboratory by
the CNRS. As a consequence, the LCMI is since then supervised by a "Comité de Direction" replacing the
previous "Comité Commun". This "Comité de Direction" meets once a year to evaluate the scientific
activities of the laboratory, summarized in a annual report, and its technical and scientific projects. The
CNRS has made a large effort to contribute to the budget of the laboratory and insured a reduced but
reasonable access time to the magnets (3500 instead of 5000 magnet hours). Today 85% of the budget is
coming from the CNRS and 15% from the European community in the framework of the "Large Scale
Facilities".
Moreover some of the MPI technical employees have been admitted on technical positions opened by the
CNRS, and the laboratory is now operating with 38 ITA (instead of 50 tens years ago). The number of
scientists supported by the MPI used to be up to 25, but the LCMI was operating in 2008 with only 10
permanent scientists (CNRS, UJF and INSA Toulouse).
Missions
The LCMI has three major missions;
1) High quality research using high magnetic fields:
The scientists of the laboratory develop their own research in the main domains of solid state physics:
semiconductors, metals and superconductors or magnetism where the quantum effects are studied. Some
techniques like the high frequency and high field EPR and the high resolution NMR are of great interest for
solid state chemistry and have been the objects of large efforts of the laboratory. This 2005-2009 report
presents the main developments of this research and of the technical improvements underpinning them.
Since the LCMI scientists also work as local contacts for visiting scientists, the number of topics studied at
the LCMI is necessarily large compared to the number of scientists, which is a necessary condition for the
operation of any large facility.
2) Providing access to external users:
The laboratory is open to the international scientific community. Any scientist wanting to use large magnetic
fields can submit a project to use the relevant infrastructure of the laboratory with the help of the
"instrumentation service" of the laboratory and of a local contact.
All projects, including the internal ones, to be realized in high magnetic fields are evaluated by an
international committee twice a year (June and December). Among around 150 projects submitted per year,
the rejection or reduction of demanded time is around 15%. The fraction of internal projects has dropped
with the departure of MPI scientists, the total number of submitted French projects being around 50 (33%).
1

3) Magnet development:
The laboratory has to produce continuous magnetic fields with the best possible performance. This can be in
terms of the field strength, but also in terms of field homogeneity and stability, or by offering special magnet
geometries. These are in general conflicting requirements and the optimal choice depends on the experiments
to be performed. The developments in magnet technology allow us to remain competitive with facilities
abroad and open our activities to other scientific domains, like high resolution NMR, and other disciplines
than physics.
National and international context
The generation of very high magnetic fields is a technological challenge and their exploitation requires a
large financial commitment. Therefore not many infrastructures exist where very high magnetic fields can be
generated and used for research. Over the last twenty years, financial limitations and the complexity of such
installations have resulted in a further concentration of these activities in less but larger infrastructures, very
often operated on a national scale. For generating continuous magnetic fields in excess of 30 T, powered
with 15+ MW power supplies, installations can be found in the USA (Tallahassee), Japan (Tsukuba) and
Europe (Grenoble and Nijmegen). Large pulsed field installations based either on motor generators or large
(> 5 MJ) capacitor banks are found in Los Alamos (USA), Tokyo (Japan), and in Europe in Toulouse and in
Dresden (created in 2006). As the most recent step in this trend, in 2007 the Chinese government has created
a 40 M€ national high magnetic field facility, consisting of a static field installation in Heifei and a pulsed
field installation in Wuhan. Still the clearest example of this trend is the creation of the National High
Magnetic Field Laboratory (NHMFL) in the USA, a three site organization that pioneers all aspects of high
magnetic field generation, and its use for scientific experiments.
The last major upgrade of the LCMI installation this was done in 1992. Despite the continuous and gradual
improvements that have been implemented since then, its installation is basically no longer up to the current
standards and major investments are needed to guarantee its international competitiveness in the future. In
particular, the construction of a hybrid magnet, combining a superconducting outsert with a resistive insert,
in order to generate fields far above 40 T is the main priority for the coming years.
To obtain the necessary investments, it is necessary to increase the weight and impact of high magnetic fields
within the context of the French large facilities. Following the example of the NHMFL, it was therefore
proposed to merge the LCMI and Laboratoire National des Champs Magnétiques Pulsés in Toulouse
(LNCMP, UMR5147) into one Laboratoire National des Champs Magnétiques Intenses (LNCMI,
UPR3228), on two sites. The new laboratory, with its increased size, scientific production and impact, and
user community, will become a more important factor among the French large facilities, and it can be
expected that through collaboration and synergy, the LNCMI will be more than just the sum of the LCMI
and LNCMP, again improving the position of high field science in France and in Europe. To strengthen the
latter aspect, the LNCMI has been advocating the creation of a European Magnetic Field Laboratory, uniting
the four major European high field installations (Grenoble, Toulouse, HLD Dresden, HFML Nijmegen). This
idea has been implemented through an ESRFI Roadmap Update proposal that was accepted last December
(www.emfl.eu). This proposal will be elaborated in the near future in the context of the FP7 design study.
Funding
The LCMI being a TGE since 2005, its annual budget has been more or less guaranteed at a constant level by
the CNRS. However, increasing electrical energy cost, and an increase in the electrical energy consumption
due to an increased use of the 24 MW magnets as compared to the 12 MW magnets make that the electricity
bill consumes an ever increasing part of the LCMI budget. In addition, in order to realize the hybrid magnet
project, which is considered to be vital to the long term survival of the laboratory, the LCMI has been
obliged to take part of the necessary investments from its annual running budget. So far this budget allowed
to hire post doc scientists to partly compensate the departure of staff scientists, but now we have reached a
point that this is no longer possible. Either an increase of the annual budget or an additional contribution to
the hybrid magnet project is necessary to assure that the laboratory can continue to operate at its current level
of activity and quality.
2

In recent years, several scientific projects at the LCMI have been funded by the ANR. Unfortunately, the
ANR refuses to fund project related to the high field installation. An ANR program to fund mid-scale
investments at the French TGE is sadly lacking.
Summary of the technical activities at the LCMI
Presently the LCMI is equipped with an electrical power and cooling installation of 24 MW. It has eight
magnet sites: five produce fields up to 23 T with 12 MW, three consume 24 MW and reach fields of
respectively 35 T, 28 T and 18 T in bore diameters of 34 mm, 50 mm and 160 mm.
Over the last few years, a steady increase in maximum field strength has been realized by improving magnet
design, materials developments and new cooling techniques. Thanks to these activities, the LCMI currently
shares the world record resistive magnetic field with the NHMFL, in spite of a much lower budget.
The laboratory is currently heavily investing in the realization of a hybrid magnet producing 42 T in a 34 mm
diameter. This project replaces an earlier project, in which the superconducting outsert, fabricated by an
industrial partner, was defective and beyond repair. No alternative industrial supplier could be found ant the
laboratory is now obliged to coordinate the manufacturing of the superconducting cable and the construction
of the magnet and its cryogenics.
During the last years, a large effort has been made to improve the stability of the power supply, now reaching
values of 5.10 -6 . This result mainly benefits the development of high resolution NMR at the LCMI.
A part from its in-house installation, the LCMI has been strongly involved in the development of other high
magnetic field installations, in collaboration with other institutions. It has strongly contributed to the FP7
Design Study ‘ESRFUp’ in which, amongst others, the possibility of the construction of a new high field
installation (40 MW, 30+ T) between the sites of the ESRF and the ILL is investigated. The results of this
study confirm the technical feasibility of such an installation and the magnets necessary to perform neutron
and X ray scattering experiments in fields above 30 T. In collaboration with the LPSC and using the unique
LCMI magnet technology, a special magnet was designed that will constitute the heart of the new European
electron cyclotron resonance ion source.
More details on these technical activities can be found below, or in greater detail in the annual reports
(http://ghmfl.grenoble.cnrs.fr)
Summary of the scientific activities at the LCMI
The scientific activities of the LCMI are spread out over many topics in condensed matter science. A more
detailed overview will be presented later on. They are all related to the effects of a large magnetic field on
the physical properties of materials or nanostructures, the other parameters being varied being typically
temperature or pressure. The scientific production of the laboratory over the reporting period is 440
publications (ACL, ACT), of which 48 with an impact factor over 6 (Phys. Rev. Lett., JACS, etc) and 4 with
an impact factor over 15 (Science, Nature etc). In view of the small number of scientists (10 permanent
scientists in 2009), this is an extraordinary result, proving the large added value of high magnetic fields as a
research tool and the high quality of the LCMI installation and researchers.
Several specific experiments have been developed to explore various new properties in high magnetic fields
that are unique in the world. In the following paragraphs a few highlights will be given.
In semiconductor physics, including its modern "nano" and "spintronics" branches, magnetic fields are used
as a powerful tool to study material properties or to create unique systems, unavailable by other means.
Focusing on the effects of electron-electron interaction, the appearance of Stoner transition which drives
2DEG into a ferromagnetic state has been demonstrated with transport experiments. Electron-electron
interactions have been also shown to be apparent in cyclotron resonance absorption of a 2DEG and to play
an important role in determining the spin and charge state of optically probed single quantum dots and to
affect the electronic transport of a 2DEG via plasmon excitations. The studies of anisotropic transport
(ratchet effect) induced by microwave excitations in a 2DEG with an intentional anisotropic disorder, and of
other microwave induced effects have revealed interesting mesoscopic phenomena which may be also
important for applications.
The newly discovered graphene, essentially a carbon monolayer, has been a very fertile playground for the
LCMI scientists; Raman scattering studies of multilayered graphene have confirmed its unique Dirac-like
electronic like spectrum, previously uncovered with magneto-spectroscopy methods. The appearance of
3

"Dirac states" at the specific point of the Brillouin zone of graphite has been also shown. The high energy
limits of Dirac spectrum have been studied with high-field magneto-optics and extremely high room
temperature mobilities of the charge carriers have been observed.
Very striking behavior in high magnetic fields has been observed for several metals and superconductors.
High field de Haas-van Alphen effect, magnetization, torque as well as recently developed high sensitivity
specific heat measurements have been used to explore high field phase diagram and electronic properties of a
number of strongly correlated electron systems. The two step 26 Tesla metamagnetic transition in CeRh2Si2
has been shown to trigger a strong modification of the Fermi surface compatible with the change from
localized to itinerant character of the 4f electrons, while the effective mass enhancement at the transition
remains relatively small. The unconventional anisotropy of the superconducting gap of the non-magnetic
LuNi2B2C and the mass-enhancement factor have been studied by dHvA effect and compared with band
structure calculations. In ZrB12, dHvA effect measurements have been used to verify its band structure in
order to confirm the two-band BCS origin of superconductivity in this compound. Finally, large Shubnikovde
Haas oscillations in layered organic materials and their strong temperature and angular dependence
confirmed the hypothesis of field-induced charge density wave transitions associated with Landau
quantization. Other high field transitions of magnetic origin have been studied in a variety of new materials
by magnetization measurements.
Nuclear magnetic resonance is rapidly gaining importance at the LCMI, which proposes the only set-up in
the world allowing NMR measurements at 40 mK in magnetic fields up to 30 T. Very interesting phenomena
in quantum magnets have been observed, in particular the magnetic structure of magnetization plateaus in
SrCu2(BO3)2 . The persistence of this superstructure above the first magnetization plateau at 28 T points to
the possibility of a “supersolid phase”. The NMR performance of the LCMI installation has been drastically
improved, allowing for high field NMR measurements that also interest the chemistry community.
More details on these scientific activities can be found below, or in even greater detail in the annual reports
(http://ghmfl.grenoble.cnrs.fr)
Summary of the other activities at the LCMI
On average, the LCMI hosts around 7 PhD or master students plus several stagiaires from engineering
schools. Several members of the LCMI staff teach at INSA Toulouse, UJF Grenoble, IUT Grenoble or INP
Grenoble. The small fraction of LCMI staff that teaches, plus the large geographic separation from the
university campus make it difficult to attract student.
About 10 national and international meetings have been organized by the LCMI during the last four years; a
list can be found below.
The installation of the LCMI has some inherent risks, which in combination with the intrinsic presence of
inexperienced external users, makes it important to pay special attention to security issues. The activities of
the two security officers (‘ACMO’) of the LCMI to reduce the risks as much as possible are detailed below.
Much attention is paid to the continuous training of the LCMI staff, in order to maintain a high level of
technical skills, as detailed below.
This report is organized as follows: A short account of the scientific and technical activities is given, then
followed by the list of publications 2005-2009 (based on data from ISI Web of Science, on July 10th, 2009)
and communications according to the AERES classification. The organization chart is given at the end,
before the annexes 1, 2 and 3.
Grenoble July 17 th 2009 G. Rikken
4

SCIENTIFIC ACTIVITIES
Spectroscopy of nano- and meso-systems
Contributors: M. Byszewski, S. Moreau, B. Pietka, O. Fedorych, C. Koerdt, K. Kowalik, M. Orlita,
P. Plochocka, M.L. Sadowski, F.J. Teran, C. Faugeras, G. Martinez, D.K. Maude, M. Potemski
Collaborators: A. Babinski (University of Warsaw, Poland), I. Bar-Joseph (Weizmann Institute, Israel), A-
L. Barra (LNCMI-Grenoble), M. Bayer (University of Dortmund, Germany), C. Berger (Institut Néel,
Grenoble, France), L. Bryja (Technical University of Wroclaw, Poland), Yu. Bychkov (Landau Institute,
Chernogolovka, Russia), J-N. Fuchs, M. Goerbig (LPS, Orsay), Y. Guldner (LPA-ENS, Paris), P. Hawrylak
(IMS-NRC, Canada), W.A. de Heer (Georgia Tech at Atlanta, USA), Y. Hirayama (Tohoku University,
Japan), R.J. Nicholas (Oxford University, U.K.), A. Pinczuk (Columbia University, USA), S. Raymond (IMS-
NRC, Canada), M. Skolnick (University of Sheffield, U.K.), S.A. Studenikin (IMS-NRC, Canada),
Z.R. Wasilewski (IMS-NRC, Canada), A. Wysmolek (University of Warsaw, Poland)
The physics of low dimensional systems (semiconductor structures and two-dimensional allotropes
of carbon) in combination with spectroscopic methods and magnetic field techniques is the central theme of
our research activity. Low dimensional systems had and continue to have a great impact on solid state
physics and on technology. They are exceptionally suitable for studying the fundamental quantum
mechanical phenomena and allow producing more and more efficient electronic devices. Applications of
magnetic fields play an important role in the investigations of low-dimensional systems. This is best
demonstrated by the discoveries of quantum Hall effects. These effects, representative for the physics of a
two-dimensional electron gas in semiconductor heterostructures, are the consequence of the unique energy
structure of two-dimensional systems in a magnetic field, which represent highly, eB/h-degenerate discrete
(Landau) levels. The energy levels of zero-dimensional systems, such as semiconductor quantum dots, are
already discrete in the absence of the magnetic field. Nevertheless, the application of this field introduces a
characteristic (magnetic) length, which can be comparable with the size of the dot (extension of the
electronic wave-function) what leads to essential modification of electronic orbitals and in consequence to
important changes in the energy diagrams of these systems. Magneto-spectroscopy and/or electronic
properties of low dimensional systems in magnetic field and under electro-magnetic wave excitation are the
representative axis of our research activity.
The relevant part of our recent activity has been focused on studies of electronic properties of
graphene (single sheet of graphite) and its derivatives. Our contributions to this emergent research area
concerns magneto-optical studies which, in contrast to more common, electric transport methods, provide
almost direct information on band structure of solids. Our group was the first to demonstrate the “Dirac like”
electronic dispersion relations of graphene-based structures using magneto-spectroscopy methods [Sad06].
Importantly, our work has shown that the Dirac-like electronic spectrum is not only characteristic of a single
graphene layer but persists in structures of multilayer graphene on C-terminated surface of silicon carbide
(C-SiC), which were used in our experiments. This initially surprising conclusion has been later confirmed in
our Raman scattering experiments [Fau08] and is today a well established, important fact.
The appearance of the Dirac-like electronic states in graphene structures on C-phase of SiC in
combination with high, room temperature electron mobilities which we have reported in these
systems [Orl08b] is important from the viewpoint of possible applications in electronics. Graphene on C-SiC
may be also the material of choice to further explore the fundamental physics of Dirac fermions in solid state
labs. Fermions in graphene are obviously not “real fermions” but only quasiparticles characteristic of band
states in solids. Nevertheless, our more recent works [Plo08] show that Dirac-like states in graphene extend
over a wide energy range (only small nonlinear effects occur, but far away from the zero Dirac point). Our
magneto-optical experiments also show that the majority of the C-SiC graphene layers are practically neutral
and that the electronic states from the immediate vicinity of the zero-Dirac point, which physics is perhaps
the most spectacular, can be investigated in these structures [Orl08b].
A few of our recent works [Orl08a, Orl09, Sch09] have aimed at reviewing the electronic properties
of graphite. This material is far more complex than graphene, but electronic states of graphite also involve
5

physics of Dirac fermions [Orl08a]. The nature of electronic states in graphene has been recently a matter of
some controversy which we then clarified in our works. Our investigations show [Orl09] that from the
viewpoint of magneto-spectroscopy experiments graphite behaves like a structure composed of a single
graphene (with massless Dirac Fermions) and a graphene bilayer (with massive Dirac fermions). Such an
image is in full accordance with the well established Slonczewski-Weiss-McClure model of the band
structure of graphite. Our simplified view of electronic states of graphite [Orl09] is only valid with respect to
magneto-spectroscopy experiments, whereas, for example, electronic transport measurements [Sch09] of this
material are sensitive to its three dimensional character.
Very appealing seems to be our latest discovery [cond-mat/arXiv:0903.1612] of the unprecedented
properties of the graphene flakes which can be found in nature, in the form of decoupled layers on the
surface of natural graphite species. Quality of these graphene flakes, when expressed in terms of electron
mobility, is found to be by two orders of magnitude higher then in any manmade graphene structures. This is
a good prognostic for further development of the graphene-oriented research, since subtle physics to be
discovered in graphene calls for significantly better quality of the manufactured structures.
Preliminary investigations of carbon-nanotubes have uncovered the intriguing high field behavior
of polymer-embedded ensembles of these objects [Nis08].
Spectroscopy of quantum Hall systems is another important research direction of our group.
Photoluminescence studies of a high mobility two-dimensional electron gas (2DEG) at low temperatures
(50mK) and high magnetic fields (30 T) allowed us to identify optical signatures of a number of fractional
quantum Hall states within the ν=1/2 family of composite fermions [Bys06]. Neutral excitons have been
found to dominate the optical response when the 2DEG is in the incompressible (insulating) phase, whereas
the effects of dressing of excitons with an additional electronic charge have been observed for the metallic
phases. Formation of fractionally charged excitons in the vicinity of the filling factor ν=1/3 has been
deduced. Quantum Hall ferromagnetism with long range order has been found to be a surprisingly fragile
phenomenon [Plo09]. A small change in filling factor ( ν=±0.01) leads to a significant depolarization of the
system. This, together with the temperature dependence, suggests that the itinerant quantum Hall
ferromagnet at filling factor ν=1 is not robust, and collapses whenever possible, to a lower energy ground
state with a large number of reversed spins. Nevertheless, small size spin textures seem to be characteristic of
the ground state of the 2DEG at filling factors far apart from ν=1, and even in the presence of considerable
disorder [Bry06]. Theoretical and experimental works on cyclotron resonance of a 2DEG at high magnetic
fields have shown evidences for its magneto-plasmon character [Byc05, Fau07, Byc08]. Influence of the
disorder on the magneto-luminescence of the 2D gas has been studied in details [Gla06, Ter05, Bab06c,
Ter06, Bry07a]. Rayleigh scattering has been found to be another method to determine the role of disorder in
two-dimensional systems [Bel07]. A number of studies have been devoted to magneto-transport properties of
a 2DEG under microwave excitations [Stu05, Stu07, Mor07]. Exact waveform of microwave induced
resistance oscillations (MIROs) has been worked out. Possible explanation of MIROs in terms of a quasiclassical
model has been proposed.
Semiconductor quantum dots have been investigated with optical magneto-spectroscopy
experiments in visible (interband transitions) and far infrared spectral range (interband and intraband
transitions). Excitations of electrons between atomic-like orbitals of quantum dots have been shown to be
strongly coupled to phonons of the surrounding matrix [Pre05, Pre06, Car06a]. Both single- and bi-polaron
states have been observed in magneto-far-infrared absorption measurements on ensembles of n-type InAs
quantum dots. Optical experiments in the visible range have been focused on single dot spectroscopy.
Zeeman splitting of the ground state emission from single and quantum dot molecule has been investigated
in details [Ort05, Bab06a]. Single dot, multiexcitonic emission due to s, p, and d-shells has been observed in
highly excited self assembled InAs/GaAs structures. Surprisingly, the evolution of the multiexcitonic lines
with magnetic field has been found to closely resemble the single particle Fock-Darwin diagram [Bab06b,
Avi08, Pre09]. However, electron-electron interactions in combination with possible effects of an
asymmetric confinement potential are deduced to lift the degeneracy of single particle states at zero magnetic
field as well as at the crossing points induced by the magnetic field. More recent studies indicate the relevant
role of the spin orbit interaction in understanding the optical response of quantum dots made of small
bandgap materials [Kor07]. Other experimental and theoretical studies identify the method of optical readout
of the spin state of the quantum dot. We now also believe to have a number of proofs which show that
GaAs/AlAs bilayer structures may contain a new class of quantum dots which are characterised of strong 3D
confinement and extremely low surface density [Pie07].
6

Magneto-transport to investigate low dimensional systems
Contributors: D.K. Maude, B.A. Piot, W. Desrat, M. Potemski, M. Orlita, J. Schneider
Collaborators: S. Vedeneev (Lebedev Physical Institute, Moscow, Russia), L.Eaves, M.Henini, (University of
Nottingham, U.K.), Z.R. Wasilewski (NRC, Ottawa, Canada), K.J. Friedland, R. Hey, K. H. Ploog (Paul
Drude Institute, Berlin, Germany), A.I. Toropov (Institute of Semiconductor Physics, Novosibirsk, Russia), R.
Airey, G. Hill (University of Sheffield, U.K.)
Magneto-transport techniques at high magnetic field (up to 32T) and low temperatures (down to 10mK) are
employed to investigate numerous different systems with reduced dimensionality, strong anisotropy and/or
strongly correlated charge carriers. Transport techniques can be combined with optics, high pressure, point
contact spectroscopy, break junction spectroscopy, and resistively detected electron spin resonance (ESR) or
nuclear magnetic resonance (NMR). We are currently developing force detected (cantilever) ESR and NMR
to complement resistively detected techniques in quantum Hall systems. Selected topics are presented below.
The quantum Hall ferromagnet at high filling factors
Many body interactions are at the origin of the rich
physics displayed by quantum Hall systems. Traditionally
invoked for the fractional quantum Hall physics, it is now
becoming apparent that electron-electron interactions play a
E
dominant role throughout quantum Hall physics, even in the u low
magnetic field, integer quantum Hall effect limit.
In this work we have shown that the appearance of spin
m
E F
splitting at high odd integer filling factor is a transition to a
quantum Hall ferromagnet [Pio05]. The appearance of a
X N
ferromagnetic state requires that the disorder energy cost of
populating higher energy levels by flipping spin, should be less
DOS (E)
than
the gain in exchange energy, which therefore stabilizes the Figure. Schematic representation of
polarized state. The density of states at the Fermi level D(EF)
increases as B/Γ, due to the eB/h Landau level degeneracy and
disorder-induced broadening (Γ). The underlying idea is that
when increasing the magnetic field we reach a sufficient
the process for spin splitting for a
disorder broadened Landau level.
the
density of states at the Fermi level to reduce the spin flip energy cost, so that the spin system eventually
becomes “ferromagnetic.”
As the Zeeman energy plays no role in this model, the appearance of spin splitting is simply the
manifestation of an itinerant quantum Hall ferromagnet in the highest occupied Landau level. This can also
be thought of as a Stoner transition, since the only role of the magnetic field is to modify the density of states
at the Fermi energy. Using very high in-plane magnetic fields to tune the single particle Zeeman energy has
allowed us to validate our zero parameter model for a Stoner transition to a quantum Hall ferromagnet
[Pio07].
High Temperature superconductors Bi2Sr2Can-1CunOx (n=1,2,3)
The origin of superconductivity in HTC superconductors remains controversial, notably the
applicability of BCS theory remains the subject of considerable debate. The cuprate high temperature
superconductors (HTSC) behave as a stack of Josephson junctions between layers of atomic thickness.
Quasiparticle tunnelling spectroscopy in high magnetic fields can be used to probe the interlayer properties,
the understanding of which is of fundamental importance with numerous potential applications of the
Josephson effect (generation and detection of electromagnetic radiation, quantum logic). The behaviour of
quasiparticles is directly related to the anomalous normal state of HTSC and to the mechanism of
superconductivity. We have investigated both the in-plane and the inter-plane resistivity in HTSC single
crystals Bi2Sr2CuO6 (Bi2201), Bi2Sr2CaCu2O8 (Bi2212) and Bi2Sr2Ca2Cu3O10 (Bi2223) in the normal and
superconducting states in high magnetic fields for a wide doping range and for temperatures down to 40 mK
[Ved05a, Ved05b, Ved07, Ved08a, Ved08b].
7

In particular, we have used break-junction tunnelling spectroscopy, at temperatures 30-50 mK in
high magnetic fields up to 28T, to directly probe the quasiparticle density of states within the energy gap in a
single crystal Bi2212 HTC superconductor. The measured tunnelling conductances dI/dV(V) in the subgap
region have a zero flat region with no evidence for a linear increase of the density of states with voltage. A
number of tunnel break-junctions exhibited dI/dV(V) curves with a second energy gap structure at the
average magnitude 2Δ=13meV. Our data cannot be explained by either a pure s-wave or a pure d-wave
pairing [Ved05].
Magneto-transport in graphite
Recently, massless Dirac fermions have been observed at the K point of the Brillouin zone in
graphene, a hexagonally arranged carbon monolayer with quite extraordinary properties. Historically,
graphene forms the starting point for the Slonczewski, Weiss and McClure (SWM) band structure
calculations of graphite. In graphite, the Bernal stacked graphene layers are weakly coupled with the form of
the in-plane dispersion depending upon the momentum kz in the direction perpendicular to the layers. The
carriers occupy a region along the H-K-H edge of the
hexagonal Brillouin zone. At the K point (kz=0), the
dispersion of the electron pocket is parabolic (massive
fermions), while at the H point (kz=0.5) the dispersion of the
hole pocket is linear (massless Dirac fermions). The
observation of massless carriers with a Dirac-like energy
spectrum, using magneto-transport measurements remains
controversial, since in the SWM model, the electrons and
hole carriers at the Fermi level are both massive quasi-particles.
We have investigated magneto-transport in natural
graphite at very low temperature (T=10 mK). Due to the low
temperatures used, the magneto-transport is much richer than
previously published data. Quantum oscillations are
observed for both majority electrons and holes with orbital
quantum number up to almost N=100 [Sch09]. We have
shown that these oscillations are fully consistent with the
presence of majority electron and hole pockets within the
three dimensional SWM band structure calculations for
graphite. At high magnetic fields (B>2T), a significant
deviation from 1/B periodicity occurs due to the well
documented movement of the Fermi energy as the quantum
limit is approached. This seriously questions the validity of
using the high field data to extract the phase of the
Shubnikov de Haas oscillations, and hence the nature of the
charge carriers.
8
Figure. (a) Right axis: Resistance Rxx versus B
measured at T=10mK for natural graphite. (ac)
Left axis: Background removed data ΔRxx
showing quantum oscillations measured over
different magnetic field regions. The high field
electron (e) and hole (h) features are indicated.
The vertical arrows indicate spin split electron
and hole features.

Mesoscopic transport phenomena in 2DESs based on semiconductors
Contributors: J.C. Portal, S. Sassine, S. Wiedmann
Collaborators: E.B. Olshanetsky, Z.D. Kvon, D. Kozlov (Institute of Semiconductor Physics, Novosibirsk,
Russia), R. Murali, K.P. Martin (Georgia Institute of Technology, Atlanta, USA), A.D. Wieck (University of
Bochum, Germany), G. Hill (University of Sheffield, U.K.), A. Nogaret, P. Saraiva (University of Bath,
U.K.), G.M. Gusev, N.C. Mamani (Instituto de Fisica da Universidade de São Paulo, Brazil), O.E.Raichev
(Institute of Semiconductor Physics, Kiev, Ukraine), D. Shepelyansky (LPT-IRSAMC,UPS, Toulouse), J.M.
Hartmann (CEA-Minatec-LETI, Grenoble), G.Faini, (LPN-CNRS , Marcoussis), V.Popov (Institute of
MicroelectronicsTechnology, Chernogolovka, Moscow, Russia)
We report on transport measurements in 2D electron systems at low temperatures (T ≥ 50 mK), in
high magnetic fields (B ≤ 34 T) and exposed to microwave irradiation (GHz-THz range). Phenomena like the
creation of a directed current in an asymmetric antidot lattice due to linear polarized microwave irradiation,
quantum Hall liquid-insulator and plateau-to-plateau transitions in HgTe quantum wells, photoresistance in
double quantum wells and interferometry in quantum wires under microwave irradiation as well as fractional
quantum Hall effect in multilayer systems are presented.
- “Ratchet” effect in a 2DEG with artificial asymmetric scatterers
[ANR PNANO MICONANO 2005 project (partners : LCMI/CNRS Grenoble, CEA/LETI Grenoble, LPT-
IRSAMC/CNRS Toulouse, LPN/CNRS Marcoussis), coordinator : J.-C Portal].
The generation of directed currents and mesoscopic photo-voltages (up to 100 mV), induced by
linear polarized microwave irradiation (GHz to THz), is investigated in an asymmetric antidot lattice. This
electronic "ratchet" effect is an original version of a universal effect existing in nature (motion in biological
systems : bacteria, proteins…). In the absence of any macroscopic forces, the appearance of a directed
transport induced by external energy sources in asymmetric systems is known as the “ratchet” effect. This
effect has a generic nature and it has been observed recently in various physical systems. We have
experimentally studied the ratchet electron transport induced by linear-polarized microwave irradiation in an
asymmetric periodic antidot lattice (semi-circular antidots) in a semiconductor heterostructure (AlGaAs/GaAs)
(Sa08, Sas07a, Sa07b). In the absence of any external current (or bias), a dc-current of a few µA is created in
the ratchet antidot lattice exposed to MW irradiation. The electron motion due to scattering events of
electrons in the asymmetric antidote lattice leads to that directed flow. We have found that (i) the direction
of the induced current depends on the orientation of the linear polarization to the lattice , (ii) the effect is
absent in symmetric lattices (with circular antidots) and (ii) exhibits linear power dependence. Therefore, we
have possibilities in future to observe this effect in structures with smaller sizes and at higher temperatures.
- Conductance properties in the presence of weak and strong electronic interaction
(low and high electronic density), effects of the disorder in the transitions between insulating and metallic
parts, the introduction of the disorder is controlled by artificial array of antidots (100 nm).(Ols06).
-Quantum Hall liquid-insulator and plateau-to-plateau transitions in HgTe quantum well
Owing to the advances in the fabrication technology of narrow gap semiconductors, a high mobility
2DEG in HgTe quantum wells (QW) has recently become available for experimental study. In the present
work the magnetic field induced QH liquid-to-insulator and plateau-to-plateau transitions in a high mobility
2DEG in HgTe QW have been studied for the first time. The experimental samples were CdTe/HgTe/CdTe
QWs with two different widths (d): d = 16 nm and d = 21 nm, grown on a GaAs substrate by means of the
MBE technology. The first QW contained a 2DEG with the electron density Ns = 2.2 × 10 11 cm -2 and the
mobility µ = 2.8 × 10 5 cm 2 /Vs while in the second the 2DEG had the Ns = 1.4 × 10 11 cm -2 and µ = 1.5 × 10 5
cm 2 /Vs.As can be seen a typical magnetic field induced transition is observed right after the Fermi energy
crosses the lowest Landau level. The transition is characterized by a critical magnetic field Bc = 10.9 T and a
critical diagonal resistivity value ρxx = 0.9h/e 2 . At the same time the Hall resistivity has a sort of a plateau on
the insulator side of the transition at the lowest temperatures.So, at a first glance,for T < 1.6 K the magnetic
field induced transition in our 21 nm HgTeQW has main features observed earlier in AlGaAs/GaAs and
Ge/SiGe structures shanetsky 7 ).
- Transport phenomena in multilayer systems
In the present studies, we report on transport phenomena in multilayer two-dimensional systems.
Due to an extra degree of freedom, bilayer or trilayer systems open the possibility to a new kind of magneto-
9

esistance oscillation in low magnetic fields and to coherent states in fractional quantum Hall effect which
occur due to an interlayer interaction between neighbored quantum wells. First, we focus on a bilayer system
which is exposed to microwave irradiation and exhibits photo-resistance oscillations, caused by the
interference of magneto-intersubband (MIS) oscillations and microwave induced resistance oscillations
(MIROs, observed systems with one occupied subband). The investigated samples are GaAs double quantum
wells (DQWs) with AlGaAs barriers and high total sheet electron density ns = 10 12 cm -2 and a mobility of μ =
10 6 cm 2 /Vs, coupled by tunneling. Transport measurements in a perpendicular magnetic field reveal MIS
oscillations owing to the alignment of Landau levels which pass consecutively the Fermi level with
increasing magnetic field. The MIS oscillation picture is strongly frequency dependent and shows enhanced
MIS peaks for high frequency, damped features and inversed MIS peaks for low frequencies. The inelastic
mechanism, generalized to the two-subband case explains behavior taking into account heating of electrons
due to microwave irradiation and the characteristic scattering times τq (quantum lifetime), τtr (transport time)
and τq (quantum lifetime) (Wie8).
Triple quantum wells (TQWs) consist of three quantum wells in a close proximity and coupled by
tunneling. In contrast to single wells, new fractional quantum Hall states are predicted in these systems if the
interlayer electron-electron interaction is comparable to the ordinary intralayer interaction, determined by the
ratio of the layer separation d to the magnetic length lb (ratio in the order of unity). The samples have an
electron density of ns = 10 12 cm -2 and a mobility of μ ≈ 0.5·10 5 cm 2 /Vs and are separated by thin barriers. In
this type of samples, density of the central well is 30% smaller than in the lateral wells. We have observed a
collapse of integer quantum Hall effect as well as two phenomena in fractional quantum Hall effect: (i)
emergence of fractional states and (ii) re-entrance of on the right side of filling factor ν = 5/2. Physics of
FQHE for n layers (n = 3: triple quantum well) with n > 2 opens interesting perspectives to study such
coherent states by varying several parameters. New theoretical works about multilayer fractional quantum
Hall states, e.g., the part on construction may lead to further studies of such systems.
- Quantum interferences of edge channels in magnetically confined quantum wires
We report on the observation of quantum interferences in a multichannel quantum wire coupled by a
microwave field at two pinning sites where electrons experience forward scattering. We use a magnetic field
to tune the phase difference between charge density waves propagating in each channel. Their interference
gives a magnetic field dependent transmission through the second pinning site which we detect through
oscillations in the magneto-resistance. Magnetically confined quantum wires (MCQW) were obtained by
fabricating Dysprosium microstrips at the centre of narrow Hall bars made of a GaAs/AlGaAs quantum well.
The depth of this MCQW was tuned between 0 and 25meV by applying a magnetic field in the plane to
magnetize the strip. At low field, the energy separation between MCQW subbands is sufficiently small for
microwave absorption through inter-channel transitions. At high magnetic field (B>9T), the energy gaps
between 1D subbands become wider than the photon energy. As a result, there is no oscillatory structure in
the magnetoresistance above 9T.
We have analyzed the oscillatory structure below 9T and conclude to the formation of 1D magnetic
subbands in the gradient of magnetic field. Microwaves excite transport in 1D subbands above the Fermi
level which results in 1D charge density waves. The magnetic field tunes the phase difference of the
charge density waves circulating in each branch by changing the Fermi wavevector. Charge density
excitations therefore interfere at two points (magnetic defects) in the manner of a Mach-Zehnder
interferometer. The phase difference between the two arms of the Mach-Zehnder interferometer gives the
magnetoresistance oscillations seen at low field. We have fitted the resistance peaks with the theoretical
maxima of power absorption by the charge density waves and find as sole adjustment parameter the distance
between the magnetic defects to be d=11μm. We thus conclude to a mean free path of charge density waves
at least equal to 3 times the electron mean free path. We have demonstrated microwave assisted
interferences of edge channels.
10

Metals and Superconductors
Contributors: A. Demuer, I. Sheikin, F. Levy (post-doc)
Collaborators: A. Huxley (University of Edinburgh, U.K.), R. Lortz (Hong Kong University, Hong Kong), K.
Behnia (ESPCI, Paris), D. Aoki (CEA-Grenoble), P. Haen, R. Rodiere, P. Lejay (CNRS-Institut Néel,
Grenoble), R. Settai (University of Osaka, Japan)
The most remarkable and significant results were obtained on the ferromagnetic superconductor
URhGe. This compound undergoes a ferromagnetic transition at TCurie of 9.5 K, below which the magnetic
moments align along the c-axis of the orthorhombic crystal structure. Superconductivity then emerges in
high quality samples below Tc of 250 mK, a temperature much lower than that of the ferromagnetic
transition. We found that in URhGe there is a first order magnetic transition where the direction of the spin
axis changes when a magnetic field of 12 Tesla is applied parallel to the crystal b-axis. We then discovered
that a second pocket of superconductivity occurs at low temperature for a range of fields enveloping this
magnetic transition, well above the field of 2 Tesla at which superconductivity is first destroyed.
Remarkably, the re-entrant superconductivity is of an origin different from the Jaccarino-Peter effect. When
the magnetic field is inclined towards the c-axis, both the spin rotation transition and the re-entrant
superconductivity move to higher fields. The transition becomes broader and the spins are no longer aligned
with the field above the transition. The magnetic transition changes to second order and then vanishes when
the magnetic field is at a few degrees from b- to the c-axis giving rise to a quantum critical point. The fieldinduced
superconductivity then disappears at a small angle of about 7 degrees. The established phase
diagram implies that it is the quantum critical point that is at the origin of the field-induced superconductivity
in URhGe. As the next step of our study, we applied the magnetic field in the crystal (ab) plane; a-axis is the
hard magnetic axis. We found that in this case the spin-rotation transition does not depend on the acomponent
of the applied field and always occurs when the b-axis projection of the field reaches 12 Tesla.
As regards the re-entrant superconductivity, it follows the spin rotation transition over a wide angular range
and was observed up to 32 Tesla, the highest field available in the laboratory at the time of the experiment.
Our findings strongly suggest that excitations in which the spins rotate stimulate superconductivity in the
neighborhood of a quantum phase transition under high magnetic field. The analysis of the coherence length
suggests that even the low field superconductivity is due to the tail of the excitations developing at the
quantum critical point. This implies that both low and high field superconducting phases are of the same
origin. This finding sheds light on the origin of superconductivity in other ferromagnets, notably recently
discovered UCoGe.
The specific heat and magnetic torque of the layered organic superconductor κ-(BEDT-
TTF)2Cu(NCS)2 have been studied in magnetic fields up to 28 T applied perpendicular and parallel to the
superconducting layers. In parallel fields above 21 T, the superconducting transition becomes first order,
which signals that the Pauli-limiting field is reached. Instead of saturating at this field value, the upper
critical field increases sharply and a second first-order transition line appears within the superconducting
phase. Our results give strong evidence that the phase, which separates the homogeneous superconducting
state from the normal state, is a realization of a Fulde-Ferrel-Larkin-Ovchinnikov state.
In CeCoIn5, an intriguing case of a heavy fermion superconductor, we performed high field
measurements of the Nernst and de Haas-van Alphen effects at low temperature and up to 28 Tesla. The
field-dependence of the Nernst coefficient in the 12 - 28 Tesla field range reveals new features emerging at
high magnetic field. The anomaly detected at HK ~ 23 T is similar to what is observed in CeRu2Si2 at Hm ~
7.8 T where a metamagnetic transition occurs. Fourier spectra of the de Haas-van Alphen oscillations
indicate that new frequencies also appear above 23 Tesla. Furthermore, the Dingle temperature was found to
decrease by about 30% at 23 Tesla. Thus, two independent sets of evidence point to the existence of a new
field scale in CeCoIn5 at 23 T. Based on the Nernst coefficient anomalies and de Haas-van Alphen results,
the previously determined magnetic phase diagram of CeCoIn5 is revised. Later, we observed a similar
behavior of the high field de Haas-van Alphen effect in another compound of the same family, CeIrIn5. This
suggests that it might be a common feature for the whole family of Ce 115 compounds.
In CeRh2Si2 we performed low temperature transport, specific heat, magnetostriction measurements
in fields up to 28 Tesla as well de Haas-van Alphen effect measurements up to 32 Tesla. When a magnetic
11

field is applied along the crystallographic c-axis, two antiferromagnetic transition temperatures, TN1 = 36 K
and TN2 = 24 K, decrease with applied magnetic field and finally merge into a two-steps metamagnetic
transition at 26 Tesla. When a magnetic field is applied along the crystallographic c-axis of the tetragonal
crystal structure, a complex two-step metamagnetic transition occurs at about 26 Tesla at low temperatures.
The transition becomes strongly first order at low temperature. The low temperature Sommerfeild coefficient
increases by a factor of two at the transition. The topology of the Fermi-surface changes above the transition
due to suppression of the antiferromagnetc order. However, the f-electrons remain localized above the
transition.
Related to the previous results, we have also performed a systematic study of the metamagnetic
transition in the series of Ce(Rh1-xRux)2Si2 alloys by measuring the magnetoresistance of such alloys with
magnetic field applied along the c-axis. With the concentration of Ru increasing, both transitions are found
to move to lower fields with the low-field transition moving faster.
We have performed de Haas-van Alphen effect measurements in ZrB12 in fields up to 28 Tesla. The
discovery of two-band superconductivity in MgB2 stimulated a substantial interest in other borides as
potential candidates for multi-band high-temperature superconductivity. ZrB12 becomes superconducting at
Tc = 6 K. Recent measurements of the temperature dependence of the magnetic penetration depth, λ(T), and
the upper critical field, Hc2(T), suggested that superconductivity in this compound can be explained within a
two-band BCS model with different superconducting gaps and critical temperature. However, contrary to
magnesium diboride, nothing was known so far about the Fermi surface topology of ZrB12. We observed
three different branches of the de Haas-van Alphen frequencies. Their angular dependence is well
reproduced by theoretical band structure calculations. The analysis of the effective masses and their
comparison with the calculated band masses support the two-band superconductivity model in ZrB12.
In CeIrSi3 with a non-centrosymmetric tetragonal structure, we have measured low-temperature
electrical resistivity in a magnetic field as a function of pressure in order to investigate its superconducting
properties. The compound is an antiferromagnet with a Neel temperature TN = 5.0 K at ambient pressure.
The antiferromagnetic ordering is completely suppressed at a pressure Pc = 2:25 GPa. In high quality
samples, superconductivity appears over a wide pressure range from 1.8 to about 3.5 GPa, with a maximum
transition temperature Tsc ≈ 1.6 K at P * c ≈ 2:63 GPa. At around P * c, the upper critical field, Hc2, for the
magnetic field H along the [001] direction is not destroyed by spin polarization based on Zeeman coupling,
but possesses an upturn curvature below 1K, revealing a divergent tendency of Hc2 at P * c. It extrapolates to a
huge value of Hc2(0) ≈ 45 Tesla. On the other hand, the upper critical field for H // [110] indicates a tendency
of Pauli paramagnetic suppression, with Hc2(0) ≈ 9.5 Tesla at 2.65 GPa. This might be a combined
phenomenon between the electronic instability at P * c and the characteristic superconducting property without
inversion symmetry in the tetragonal structure.
12

Systems of strongly interacting electrons studied by high-field NMR
Contributors: S. Krämer, M. Klanjšek, F. Aimo, M. Horvatić, C. Berthier
Collaborators: C. de Vaulx, M.-H. Julien, H. Mayaffre (Lab. de Spectrométrie Physique, CNRS/UJF,
Grenoble), V. Simonet, P. Lejay (Institut Néel, CNRS/UJF, Grenoble), B. Grenier (SPSMS, INAC, CEA
Grenoble), V. Pralong, S. Hébert, A. Maignan (CRISMAT, CNRS/ENSICAEN, Caen), J. Wooldridge, G.
Balakrishnan, M.R. Lees (Warwick Univ., U.K.), E. Orignac, (Laboratoire de Physique, CNRS/ENS de Lyon),
V. F. Mitrović, (Brown Uniersity, Providence, USA), W. G. Clark (UCLA, USA), R. Stern (NICPB, Tallinn,
Estonia), K. Hiraki (Gakushuin University, Tokyo, Japan), H. Kikuchi, Y. Fujii (Fukui University, Japan),
M. Takigawa (ISSP, Tokyo, Japan), F. Mila (EPFL, Lausanne, Switzerland), T. Giamarchi, (Geneva
University, Switzerland), O. Waldmann (Bern University, Switzerland), B. Pilawa, (University of Karlsruhe,
Germany), C. T. Lin (MPI, Stuttgart, Germany), O. Piovesana (University of Perugia, Italy)
Contracts: ANR contract NEMSICOM, EC contract EuroMagNET (NMR joint research activity)
The NMR investigations at the LNCMI-G cover a number of different physical systems focusing on
magnetic field induced phenomena. We favour studies in very high magnetic fields and at very low
temperature, that is, in conditions which cannot be accessed with other techniques (such as neutron
diffraction) or with standard NMR setups. "Strongly interacting electrons" are meant to include: i) quantum
spin systems (insulators), as model systems for collective phenomena of quantum magnetism, ii) low
dimensional organic conductors and heavy fermions systems, for studies of magnetic field induced phases
and, in particular, for field-induced superconductivity, as well as iii) thermoelectric cobalt oxides, where we
address electron correlation effects and Na vacancy patterning. As the high-field NMR facility is open to
visitors and their projects, the number of investigated systems is relatively large, many of them being studied
in a collaborative effort. We mention here only our most important results and publications, mostly in the
Phys. Rev. Lett. Several scientific projects have requested important technical developments of NMR probes
and spectrometers. We note the construction of the narrow bore NMR probes for the dilution and 3 He
refrigerators for resistive magnets that provide the highest magnetic field, as well as the extension of the
NMR frequency range above 1 GHz, namely up to 1.9 GHz which corresponds to the proton resonance in a
field of 44 T.
Our principal research subject are the magnetic field induced phenomena in quantum spin systems.
Most of them are antiferromagnetic Heisenberg systems of coupled (copper) spin S = 1/2 dimers, where
interesting physics is generated the field induced singlet–triplet crossing, provoking quantum critical phase
transition to a polarized state. Important modification, which drives these systems away from the ideal
Heisenberg Hamiltonian, is induced by the presence of anisotropic Dzyaloshinsky-Moriya (DM) interactions
on the dimer bonds, as these mix the singlet and the triplet states. These effects were for the first time
identified and understood in the Cu2(C5H12N2)2Cl4 "ladder" system [Cle06]. In [Miy07] we have explained
how they also strongly influence the magnetic torque measurements. We have also quantified by NMR the
presence of DM terms in SrCu2(BO3)2 [Kod05]. This compound is regarded as the model compound for the
"Shastry-Sutherland", 2D, strongly frustrated system of orthogonal S = 1/2 dimers, and has been intensely
studied to understand its magnetization plateaus at 1/8, 1/4 and 1/3 of the saturation magnetization. The
torque measurements in this compound are indeed influenced by the DM terms [Lev08] which has even lead
to a controversy about these results [Lev09]. Our most important results on SrCu2(BO3)2 are NMR insights
on the nature of phases between the plateaus, which may be an analogue of a supersolid phase, where the
interstitial triplets undergo Bose-Einstein condensation (BEC) in the background of the commensurate
superlattice. By high-field NMR we have proved the existence of such background, namely the spin
superlattice formed in the 1/8 plateau is found to survive above the plateau, that is above 28.4 T [Tak08]. By
NMR we have also discovered a new phase adjacent to the 1/8 plateau, and by torque measurements we
identified this phase as a new plateau and determined its complete phase diagram [Lev08]. Most recent
(unpublished) NMR investigation up to 34 T provides clear evidence for another plateau state attributed to
the fraction 1/6.
The "Han purple" (BaCuSi2O6) compound was recently proposed to be an ideal candidate for the
BEC of triplet excitations in a 2D coupled dimer spin system. Our NMR data in this compound revealed that
there is a structural phase transition at ~90 K which not only introduces an incommensurate distortion within
13

the planes, but also leads to the existence of at least two types of planes, alternating along the c-axis, with
different intradimer exchange couplings and energy gaps. As a consequence, the field induced BEC state
appearing above 23.4 T is also modulated, with the boson density being very small in every second plane
[Kra07]. This state turns out to be very special and is subject of further detailed NMR and theoretical
investigation.
Very recently, a new spin ladder system was identified, CuBr4(C5H12N)2 (BPCB), in which by crystal
symmetry the DM term on the rungs has to be zero. Our 14 N NMR study showed that BPCB is a nearly
perfect 1D system, and thus a unique candidate for controlling and probing the Luttinger Liquid (LL) physics.
We have quantitatively characterized the variation of Luttinger parameters over the whole gapless phase of
BPCB. This allowed us to fully account for the phase transition to a 3D ordered phase at temperatures below
110 mK, which takes place due to weak inter-ladder exchange coupling, in terms of weakly coupled LLs
[Kla08 (labelled as "Editors' suggestion")].
The azurite, Cu3(CO3)2(OH)2, is the first recognized model system for a frustrated diamond spin
chain. In its magnetization vs. magnetic field curve it presents a wide plateau at 1/3 of the saturation
magnetization. By NMR we have given the first direct experimental evidence that this plateau is of pure
quantum character and corresponds to a state in which, out of 3 spins in a unit cell, 2 spins are paired into a
singlet state while the third one is fully polarized [Ai09].
Molecular magnetic clusters (zero-D spin systems) have also received enormous attention because of
their spectacular quantum phenomena. The "CsFe8" molecule, which realizes a ring of eight spin-5/2 Fe(III)
ions, is the only antiferromagnetic ring system in which a new phase appears near the magnetic field induced
molecular level crossings. Our 1 H NMR spectra and T1 -1 relaxation rate data showed that the novel phase is
characterized by a huge staggered transverse polarization of the electronic Fe spins, and the opening of a gap,
providing the first microscopic evidence [Schnelzer 7] for the previously proposed interpretation in terms of
a field-induced magneto-elastic instability.
In the organic charge transfer complex λ(BETS)2FeCl4 a field induced superconductivity appears
between 18 T and ~45 T, with the maximum TC at 33 T. The origin was assumed to be the Jaccarino-Peter
compensation effect, where the applied external field is cancelled by a negative exchange field Hexch between
the spins of the π (conduction) band and the localized spins of Fe 3+ ions. We proved this mechanism by
observing the cancelation of the total (effective) local field through high-field 77 Se NMR measurements of
the hyperfine shift of the p electrons. The corresponding publication has been selected as the "Paper of
Editors' Choice by JPSJ Editorial Board" [Hir07].
The heavy-fermion superconductor CeCoIn5 was studied in the vicinity of the superconducting
critical field, where a possible inhomogeneous superconducting (SC) state, the Fulde-Ferrell-Larkin-
Ovchinnikov (FFLO) state, is thought to appear. This phase was clearly identified and characterized first by
the 115 In NMR line-shift measurements as a function of temperature [Mit06], followed by the field
dependence over an extended magnetic field range (2-13.5 T) at very low temperature (≅70 mK) [Kou08].
We have also proved that the first NMR data on this compound, published by the group of Kumagai, were
erroneous because of excessive excitation power [Mit08b].
Recent studies of sodium cobalt oxides NaxCoO2 have revealed a rich phase diagram with
superconductivity, anomalous magnetism and strong thermopower, where electron correlations play an
essential role. We have studied several members of this cobaltate family, using 59 Co and 23 Na NMR. We
identified the stoichiometric Na1CoO2 phase, which is shown to be a nonmagnetic insulator, as expected for
homogeneous planes of Co 3+ ions with S = 0. We also showed that for compounds with a slight average Na
deficiency (x ≈ 0.95-0.98) there is a chemical and electronic phase separation into x = 1 and x = 0.8 phases:
Na vacancies segregate into the well-defined, magnetic, Na0.8CoO2 phase [De Vaulx 5]. In the x = 0
compound (CoO2) our data reveal a metallic ground state, at variance with the Mott insulator phase expected
by many [deV07]. In the thermoelectric Na0.75CoO2, we demonstrate a remarkable impact of the Na + vacancy
ordering on the cobalt electronic states in Na0.75CoO2. At long time scales, there is neither a
disproportionation into 75% Co 3+ and 25% Co 4+ states, nor a mixed-valence metal with a uniform Co 3.25+
state. Instead, the system adopts an intermediate configuration in which 30% of the lattice sites form an
ordered pattern of localized Co 3+ states [Jul08]. This result raises the hope of tailoring electronic properties
through the control of ion doping in these materials.
14

High-Field EPR for the study of transition metal ion complexes
Contributors: A.L. Barra, C. Duboc, P. Neugebauer
In the last decades, EPR has undergone a profound renewal, with the advent of High-Field and High-
Frequency EPR (HF-EPR) as well as the development of pulsed techniques. HF-EPR has proven to be very
powerful for the study of transition metal complexes from mononuclear systems to Single-Molecule Magnets
(SMM). The domain has now grown up to establishing relations between electronic and molecular structures
not only for mononuclear complexes but also for spin clusters and it allows determining the structural
parameters governing the magnetic anisotropy. This is also an essential step to understand the reaction
mechanisms for paramagnetic moieties from enzymes. Here we report our main results obtained during these
last four years with the application of HF-EPR to topics of interest to chemistry and biology.
Mononuclear complexes
With its multifrequency operation, our HF-EPR spectrometer is particularly suited for the study of
spin systems with S>1/2. Among these, the non Kramers ions, EPR-silent at standard EPR frequencies due to
large Zero-Field Splittings (ZFS), are the main focus of study. An illustrative example involves two Ni(II)
complexes (S=1), with very similar ligands derived from galactose which possess three O-CH2-pyridine
pendant arms that chelate the Ni ion. [Cha07]. The analysis of the EPR spectra recorded at several
temperatures and frequencies shows a striking change of sign for the axial term of ZFS (D parameter)
whereas the rhombicity (E/D) is the same. Ligand field calculation for both complexes, within the Angular
Overlap Model, allowed understanding the change of sign for D. The structural difference responsible for it
results from the nature of the sugar scaffolds. In one case, the sugar scaffold imposes an intramolecular
hydrogen bond with one of the atoms linked to the Ni II which leads to a distorted coordination sphere and a
positive D, while the absence of such a hydrogen bond in the other complex results in a less distorted
environment around the Ni center and leads to a negative D value.
HF-EPR is also useful for the study of half-integer spin systems with S>1/2, e.g. allowing
approaching the high field limit where spectra are easy to analyze. Such studies have been performed on
Mn(II) or Fe(III) complexes. In the case of Mn(II) numerous mononuclear complexes have been described.
However, few studies existed on the precise determination of their electronic parameters, most of them being
obtained from EPR spectroscopy. Several mononuclear Mn(II) complexes have been studied by HF-EPR,
allowing the determination of the ZFS parameters, and.the results were then analyzed with DFT model
calculations [Duboc8]. They reveal that D is closely connected to the coordination number (5 or 6) of the
Mn(II) ion, D being dominated by spin-orbit contributions for 5-coordiantion whereas spin-spin interaction
gives the leading part for 6-coordination. In the case of halide complexes, D is correlated with the nature of
the halide anion
These studies illustrate the interest of combining HF-EPR spectroscopy with theoretical approaches
relying on molecular calculation such as AOM or DFT. Beyond obtaining magneto-structural correlations for
the magnetic anisotropy, this approach is fundamental for defining the best suited starting blocks for building
up SMM with large anisotropies (bottom-up approach) or for the understanding of reactivity (for catalysis or
for metalloenzymes when the metal center is the active site).
The previous examples deal with synthetic complexes, where quantities can be large. Taking
advantage of the Quasi-Optical configuration of the HF-EPR spectrometer, it has been possible to extend this
approach to a mononuclear high-spin ferrous iron centre in a protein. Rubredoxins are small iron-sulfur
proteins (~6 kDa) that contain a mononuclear tetrahedral [Fe-4S] site. A frozen solution of the mutant Rm
A44S of Pyrococcus abyssi in its reduced state has been measured at several frequencies and temperatures,
leading to the first EPR determination of the magnetic anisotropy of a ferrous iron centre from a protein
[Barra6]. It illustrates the interest of the Quasi-Optical multifrequency approach for the study of biologically
relevant metal centres with large ZFS.
15

Single-Molecule Magnets
Recently, the progress realized experimentally and theoretically has allowed extending the studies of
magneto-structural correlations to the magnetic anisotropy of complex magnetic systems, namely SMMs.
SMMs are molecules which magnetization relaxes slowly at low temperature; they have attracted a lot of
interest due to their behaviour similar to the one of superparamagnets together with quantum effects such as
Quantum Tunnelling of the Magnetization (QTM)
A single-crystal HF-EPR study was performed on a truly axial SMM of the Mn12 family to
investigate the origin of its transverse magnetic anisotropy, a crucial parameter for QTM. The angular
dependence of the resonance fields in the crystallographic ab plane shows the presence of high-order
tetragonal anisotropy and strong dependence on the MS sublevels with the second-highest-field transition
being angular independent. This behavior was explained considering fourth- and sixth-order transverse
parameters with opposite effect in the Giant Spin Hamiltonian (GSH) describing the magnetic anisotropy in
the S=10 ground state. To establish the origin of these anisotropy terms, the results were analyzed using a
simplified multispin Hamiltonian which takes into account the exchange interactions and the single ion
magnetic anisotropy of the Mn(III) centres. It has led to magnetostructural correlations with GSH parameters
up to the sixth order. It shows that the transverse anisotropy originates from the multi-spin nature of the
system and from the break-down of the strong exchange approximation leading to the S-mixing [Barra7b].
Another very important study deals with a family of tetrairon(III) SMM with a propeller-like
structure and an S=5 ground state [Gregoli9]. They exhibit tuneable magnetic anisotropy barriers in both
height and shape, and the first SMM to show magnetic hysteresis (at gold surfaces) belongs to this family.
HF-EPR analysis allowed determining the dependence of the axial anisotropy parameter D on the propeller
pitch over a series of twelve complexes. A similar relationship was first found to hold also for the fourth
order axial term, but the uncertainty on the powder measurements didn’t allow extending this relation to all
complexes.
Spectrometer developments
A pulsed HF-EPR spectrometer is currently being implemented, which will open important
applications especially for distance measurements on spin labelled biological systems such as synthetic DNA
strands. A Fabry-Pérot cavity has been built to operate with the Quasi-Optical set-up. It has a finesse of
about 700 at 283 GHz. A new detection has also been implemented, with a mixer involving a heterodyne
detection, with an intermediate frequency of 1.8 GHz. At 283 GHz, the resulting sensitivity is comparable to
the bolometer one. This new set-up is already operative in continuous wave and will be soon available also
for pulsed operation. A new magnet, with a much better homogeneity (~5 ppm) and a higher maximum field,
will also allow extending the application of the spectrometer to radical species.
16

High resolution NMR in resistive magnets
Contributors: S. Krämer, M. Horvatić, C. Berthier, F. Debray, J. Dumas, Ch. Trophime, N. Vidal,
P. Petmezakis, R. Barbier, E. Yildiz, P. Sala
Collaborators: P.-H. Fries (CEA, INAC, SCIB, RICC, Grenoble), O. Pauvert, A. Rakhmatullin, F. Fayon, C.
Bessada, D. Massiot (CEMTHI/CNRS, Orleans), M. Mehring (University of Stuttgart, Germany) Contracts:
CPER Rhône Alpes “Nanoscience et Matière”, FP7 EU contract EuroMagNET II (Nr. 228043)
The LNCMI intends to establish high resolution NMR in resistive magnets at fields of the order of
30-32 T as an innovative research and development activity. Its implementation will make the laboratory
more attractive for a wider research community, in particular for chemists and material scientists. In the
following we report on the first scientific and technical achievements within this framework.
NMR study of paramagnetic relaxation enhancements (PRE) above 1 GHz
We studied for the first time the PRE of 1 H in diamagnetic species interacting with paramagnetic
metal complexes in solution above 1 GHz and up to 1.36 GHz. This provides a deeper insight into the
intermolecular recognition movements, in particular those governing the efficiency of contrast agents used in
Magnetic Resonance Imaging (P.-H. Fries et al.).
Ultrahigh field NMR of quadrupolar nuclei at 30 T
High magnetic field can overcome the problem of line broadening in NMR spectra of nuclei with
strong quadrupole interactions. As an example we recorded 91 Zr NMR spectra of ZrF4 at 30 T (left figure), a
compound with application potential in nuclear industry (O. Pauvert et al., submitted to Inorganic Chemistry
2009).
Figure left: 91 Zr NMR powder spectra of ZrF 4 at 17.6 T (a) and 30 T (b). The spectrum shows the central transition, dominated by
second order quadrupole interaction that is strongly reduced at 30 T. The spectra (blue line) can be modeled (green and purple
lines) assuming two different Zr sites. Figure right: Active, NMR based field stabilization of GHMFL M9 resistive magnet at 29.5 T
acting directly on the main 24 MW power converter. The average field drift is completely suppressed and the remaining error of the
closed control loop is 1.2 ppm.
Technical milestones towards implementation of high resolution NMR at LNCMI
The technical part of the activity comprises tailored NMR instrumentation and efforts to improve the
intrinsic field inhomogeneity and instability of resistive high field magnets. The first experiment exploring
an active NMR based field stabilization was performed in 2008 on LNCMI 24 MW M9 magnet at 29.5 T.
The right figure shows a 90 minute record of the closed loop field stabilization performance. The long term
field drift is completely suppressed and the short term field variations remain within the 1 ppm threshold
during the entire experiment (σ =1.2 ppm). In summary this result demonstrates that the long term field
stability condition for high resolution NMR in resistive magnets (1 ppm) can be reached by active, NMR
based field stabilization.
17

Magnetometry and magnetic properties under high continuous magnetic fields
Contributor: M. Guillot
Very deep collaborations with French and foreign groups have been developed in the frame of the
magnetic measurements. Exchanges with different countries (China, USA, Poland, Turkey, Romania,
Canada….) have been then maintained. Two examples of studies may be selected.
The magnetic phase diagrams of RFe11Ti compounds are strongly modified upon insertion of light
elements (H, C, and N) within the crystal structure. Investigation of the magnetic properties of PrFe11.04Ti0.96
and PrFe11.04Ti0.96H reveal the effect of H insertion on the magneto crystalline anisotropies. For the first time
a giant H, D isotope effect has been observed from the magnetic properties of Y1-xRxFe2 (H,D)4.2 (R= Tb, Er,
Lu) compounds. These compounds undergo a magnetovolumic transition at a temperature which is about 45
K higher in hydrides compared to the corresponding deuterides. A detailed study of the structural and
magnetic properties of YFe2(H,D)4.2 compounds, using magnetic measurements at high fields, Mossbauer
spectroscopy and neutron diffraction versus temperature and pressure have allowed us to explain the
magnetic transition by an itinerant electron metamagnetic behaviour of one Fe moment among eight, leading
to a ferro-antiferromagnetic change of structure.
Some weeks ago a new magnetometer has been successfully controlled on the M9 magnet under 35
T in the 1.5-350K temperature range. It is worth noting that the two main challenges were I) one unique
sample holder which can be used either in a 50mm bore or in a 33mm bore in Grenoble or in the Vibrating
Sample Magnetometer in the NHMFL (Thallahassee USA). ii) Precise absolute calibration of the
magnetometer was performed. this set sup offers the advantage of a good sensitivity in the order of 2 10 -3
e.m.u.; the relative accuracy is estimated to be 0.1 % when the M lies in the order of one e.m.u. while the
reproducibility on the field and on temperature are 0.01 T and 0.2K, respectively. Note that the sample cavity
volume is of about 125 mm 3 .
Characterization of superconducting wires and tapes
Contributors : E. Mossang, J.P. Domps
Collaborators : P.X. Zhang, L. Zhou, H.L. Xu, C.S. Li, G. Yan, Y. Feng, Y.F. Wu, Q. Wang (NIN, Xi’an, P.R.
China), Z.S. Gao, X.P. Zhang, D.L. Wang, Z.G. Yu, Y. Ma (IEE, Chinese Academy of Sciences, Beijing, P.R.
China), P. Tixador (Grenoble INP, CNRS, Grenoble), L. Porcar, A. Sulpice (Institut Néel, CNRS, Grenoble),
A. Malagoli, M. Vignolo, G. Romano, C. Fanciulli (CNR-INFM LAMIA, Genova, Italy), E. Pusceddu, X. Lu,
S. Pragnell, J. Higgins, J.Y. Xiang, D.P. Hampshire (University of Durham, U.K.), J.M. Rey (DSM-DAPNIA-
SACM, CEA Saclay), H. Cloez, S. Girard, J.L. Maréchal, M. Nannini, C. Roux, J.P. Serries, L. Zani
(Association Euratom-CEA, DSM/DRFC/STEP/CEA Cadarache), G. Grasso (Columbus Superconductors
SpA, Genova, Italy)
Research plans focuses on the development of low Tc superconductors strands and wires (NbTi,
Nb3Sn) and high-Tc superconductors tapes and wires: Bi2Sr2CaCu2O8 (Bi-2212) and Bi2Sr2Ca2Cu3O10 (Bi-
2223) in pure Ag and Ag alloys, YBa2Cu3O7-x coated conductors and MgB2. Studies in progress on low Tc
superconductors are performed wit many national nd international collaborations [Zan05].
Significant effort has been put into the development of high performance Nb3Sn strands over the last
decade. This has been particularly motivated by the ITER reactor to be built in Cadarache. One focus has
been to optimize the critical current density (Jc) of Nb3Sn strands. Jc is very sensitive to the axial strain ( ).
Characterizing the field, temperature and strain dependance of Jc(B,T, ) is very important. We have
measured the strain dependance of Jc at different temperatures (T) in magnetic fields up to 28 T (LNCMI)
and 15 T for the Nb3Sn strands. These comprehensive measurements are essential to characterise strands for
the ITER project and other large superconducting systems. Jc(B,T, ) measurements are performed in
collaboration with Durham University.
Variable temperature characterizations of NbTi strands are performed for JT-60SA TF coils.
The mission of the JT-60SA Tokamak, to be built in Japan, is to contribute to the early realization
of fusion energy by its exploitation in support of the ITER program. JT-60SA project is an
18

important part of the broader approach activity as a satellite program for ITER. The Toroidal Field
(TF) coils are a European contribution and they will partly be built in France. This study is
performed in collaboration with Alstom and IRFM, CEA, Cadarache, France.
High Tc superconductors open extremely interesting perspectives for very high field
applications such as high field magnets for NMR or SMES, nuclear fusion or future colliders. These
materials make possible to operate at temperatures higher than 4.2 K. Institut Néel and the LNCMI
have decided to build a Variable Temperature Insert (VTI) for Ic measurements, in the frame of the
“Super SMES” ANR project, in collaboration with Nexans, IRFU/CEA Saclay and the LNCMI.
This VTI is an extremely useful tool for the very high field magnet developments with high Tc
superconductors.
Magnesium Diboride (MgB2) is a potential alternative to the Nb-based superconductor due
to its rather raw material costs, its possibility for cryocooler use at around 20 K and its reasonable
upper critical field (Hc2) values. [Wan09], [Zha09], [Ma07], [Wan07] I [Mal08] These studies
take place in the frame of projects on MRI.
The collaboration with NIN Xi’an takes place within the framework of a French-Chinese
“Laboratoire International Associé” [Gao07a], [Gao07b], [Xu07], [Xu06], [Li07], [Fen05],
[Xu05a], [Xu05b].
Magneto-sciences
Contibutor: F. Debray LNCMI,
Collaborations :E. Beaugnon CRETA UPS 2070,
JP Chopart LACM-DTI, LRC CEA, Université de Reims
Th. Alboussière LGIT, UJF
Magnetosciences concern the magnetic field effects in processes, including physical, chemical and biological
processes. Such effects come from electromagnetic interactions that can be divided in two main categories:
MHD (Magneto-Hydro-Dynamic) and MS (Magneto-Static). Effects also often combine both and include
other kinds of interactions.
This activity has strongly developed at LNCMI during the last 4 years, leading to the creation of a dedicated
branch of expertise in the program committee of the laboratory. About 15 projects are led now per year at the
laboratory in this domain, which represents about 10 % of the total number of project. Considering the last 4
years of activity, we can subdivide this domain in three branches.
1- Electrochemistry under high magnetic field 1,2
2 - Metallurgy under high magnetic field 3
3 - Magnetohydrodynamics (turbulence under magnetic fields, Alfen waves).
Most of the experiments performed in Magnetosciences are made on large diameter bore magnet. Three
configurations are used at the laboratory, 6 T in 284 mm (5MW), 13 T in 130 mm (10 MW) and 19 T in 160
mm (20 MW).
The need for large bore is a specific need of this field of research, it is easily understandable for domain 2
(need of oven to be inserted in the bore) and domain 3 (sufficient range of scale between viscous scale and
apparatus scale.
For electrochemistry, part of the experiments could be performed at higher field, miniaturization of
electrochemical cells is then an axis of development for this activity.
To strengthen this research domain in Europe, the CNRS has created in 2008 a GDRE (Groupement de
Recherche Européen) called GAMAS. This is actually the CNRS’s largest structure of this kind.LNCMI and
CRETA have contributed to the preparation of GAMAS and have promoted the creation of a transversal
Working Package to promote the use of high magnetic fields in the four domains of the GDRE namely,
Magneto static, Applied MHD, Magnetic fluids and Magneto electrolysis. The facility in LNCMI is
19

dedicated to experiments with the highest magnetic fields, while the superconducting magnets in CRETA are
more devoted to long duration experiments in large bore but reduced fields (8 and 11 T). LNCMI and
CRETA will encourage scientists of the others group to perform unique experiments in high magnetic field
conditions in order to explore new frontiers of magneto-sciences. In addition, CRETA policy encourages the
applications of magneto-sciences and promotes industrial collaboration. The proposals will be twice a year
reviewed by the program committee of LNCMI following the classical procedure of this large scale
facility.In the duration of the GDRE the new scientific investigations that will be led will contribute to
identify the special requirement for future magnets and instrumentations that will be relevant for the
development of magneto science (e.g.: split magnet, magnetic table, high gradient magnet (uniform grad B or
grad B2), rotating magnet etc..).
1 Kinetics of Cu2O electrocrystallization under magnetic fields
A.Daltin, F.Bohr, JP Chopart, Electrochimica Acta 54 (2009) 5813–5817
2 Effect of natural and magnetic convections on the structure of electrodeposited zinc–nickel alloy
A. Levesque, S. Chouchane, J. Douglade, R. Rehamnia, J.-P. Chopart, Applied Surface Science 255 (2009) 8048–8053
3 3D Physical Modeling of Anisotropic Grain Growth at High Temperature in Local Strong Magnetic Force Field
" Sci. Technol. Adv. Mater. 9 (2008), 2420
20

High magnetic field development
Magnet development outcome: 2005/2009
From 2005 to 2009, the magnetic field available to researchers at the LNCMI has been increased
from 28 teslas in a 50 mm bore to 35 teslas in a 34 mm diameter bore. This result was obtained by
developing the polyhelix technology. The helix technology developed in Grenoble has proved to be able to
produce the highest continuous resistive field in the world. Undergoing project is the preparation of a magnet
with B > 30 teslas in a 50 mm bore and the standardization of the three sites 20 MW sites of the LNCMI
(M8, M9, M10) so that they could accept any high field insert. Critical points of construction have been
patented end 2007 by the laboratory to protect this efficient technology 1 . It consists of the optimization and
realization of patterns in the helix cut itself. This construction procedure is suitable to form windings well
adapted for electromagnet design (using metal alloys or massive superconductors) as the cut’s pattern can be
optimized to hold mechanical constraints that originated from electromagnetic and/or thermal constraints.
Such a design has been tested first in the 32 T magnet and is now fully operational in the 35 T magnet.
Table 1: The “high field” status of the LNCMI facility
Magnet site Magnetic field Remarks
M9 35 T in 34 mm World record for resistive magnet (March 2009)
M10 28 T in 50 mm B > 30 T planned for 2010
M8 19 T in 160 mm
From 2010, the configuration will be available on M9 and M10, M8 site
will then be free for the 42 T hybrid project
M1/M6 23 T in 50 mm Field available on two sites, 25 T version for 2010
M7 20 T in 50 mm Dedicated to applied superconductivity
M5 13 T in 130 mm Mainly applied superconductivity and magneto-sciences
Top view of the 14 helix 35 magnet of the LNCMI Optimized cut patterns have been applied in 2008 and 2009
on pair of helices that are radially cooled in series. These new
technologies are available to researchers in 2009 on the new M1,
12 MW high field site. This new design leads to a better cooling
of the inner most helices and consequently allows to apply
higher current densities on the inner most helix. The validation
of this technology has allowed to use it in the design study made
in the frame of the ESRF upgrade study for high field magnet
suitable for diffraction (cf § Magnet for diffraction studies).
Undergoing optimizations aim at reducing the mechanical stress
on the critical helices to be able to sustain the new specifications
of the 42 T CEA/CNRS hybrid project. For this we develop high field magnets that will use a combination of
the two helix technologies (namely, longitudinally and radially cooled). The first version of this “mixed
insert” is planned to be available in 2010 in a 50 mm version with a magnetic field higher than 30 T. If
successful we aim at developing a 38 Tesla magnet in a 34 mm configuration for 2011.
The successful development of the helix high field technology has permitted to propose the use of
this technology in the heart of the projects that will contribute to define the future of the LNCMI. This
technology will be combined in the future with the use of High Temperature Superconductors for the
definition of the high field projects for the period 2015/2020.
These aspects are presented in the § “Perspectives for magnet development 2010/2014”.
1Brevet
FR2923073 & WO2009053420, 2009, Bobine apte à générer un champ magnétique et procédé de
fabrication de ladite bobine
21

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high mobility 2D electron gas in an HgTe quantum well. Jetp Lett. 84, 565 (2007).
[Pet07] K. Petukhov, S. Bahr, W. Wernsdorfer, A.-L. Barra, and V. Mosser. Magnetization
dynamics in the single-molecule magnet Fe-8 under pulsed microwave irradiation. Phys.
Rev. B 75, 064408 (2007).
[Pic07] C. Pichon, P. Mialane, E. Riviere, G. Blain, A. Dolbecq, J. Marrot, F. Secheresse, and
C. Duboc. The highest D value for a Mn-II ion: Investigation of a Manganese(II) polyoxometalate
complex by high-field electron paramagnetic resonance. Inorg. Chem. 46, 7710
(2007).
[Pie07] B. C. Pietka, A. Wysmolek, R. Stepniewski, M. Potemski, S. Raymond, R. Bozek, and
V. Thierry-Mieg. Direct bandgap quantum dots embedded in a type-II GaAs/AlAs double
quantum well structure. Int. J. Mod. Phys. B 21, 1654 (2007).
[Pio07] B. A. Piot, D.K. Maude, M. Henini, Z. R. Wasilewski, J. A. Gupta, K. J. Friedland,
R. Hey, K. H. Ploog, U. Gennser, A. Cavanna, D. Mailly, R. Airey, and G. Hill. Influence of
the single-particle Zeeman energy on the quantum Hall ferromagnet at high filling factors.
Phys. Rev. B 75, 155332 (2007).
[Pot07] M. Potemski. Spectroscopic studies of semiconductor structures in magnetic fields. Int. J.
Mod. Phys. B 21, 1358 (2007).
39

[Poz07] M. Pozek, A. Dulcic, A. Hamzic, M. Basletic, E. Tafra, G. V. M. Williams, and
S. Kraemer. Magnetotransport of lanthanum doped RuSr2GdCu2O8 - the role of gadolinium.
Eur. Phys. J. B 57, 1 (2007).
[Rus07] V. H. Russell, S. N. Holmes, P. Atkinson, D.K. Maude, F. Sfigakis, D. A. Ritchie, and
M. Pepper. Suppression of spin-splitting in Al0.33Ga0.67As/AlyGa1−yAs heterostructures
with y varying from 0.10 to 0.15. Semicond. Sci. Technol. 22, 722 (2007).
[Sad07a] M. L. Sadowski, G. Martinez, M. Potemski, C. Berger, and W. A. De Heer. Magnetospectroscopy
of epitaxial graphene. Int. J. Mod. Phys. B 21, 1145 (2007).
[Sad07b] M. L. Sadowski, G. Martinez, M. Potemski, C. Berger, and W. A. de Heer. Magnetospectroscopy
of epitaxial few-layer graphene. Solid State Commun. 143, 123 (2007).
[Sal07] B. Salameh, A. Nothardt, E. Balthes, W. Schmidt, D. Schweitzer, J. Strempfer, B. Hinrichsen,
M. Jansen, and D.K. Maude. Electronic properties of the organic metals Θ-
(BEDT-TTF)2I3 and ΘT-(BEDT-TTF)2I3. Phys. Rev. B 75, 054509 (2007).
[Sas07] S. Sassine, Y. Krupko, E. B. Olshanetsky, Z. D. Kvon, J.-C. Portal, J. M. Hartmann, and
J. Zhang. Microwave radiation induced collective response in Si/SiGe heterostructures
with a 2D electron gas. Solid State Commun. 142, 631 (2007).
[Sch07] L. Schnelzer, O. Waldmann, M. Horvatić, S. T. Ochsenbein, S. Kraemer, C. Berthier,
H. U. Guedel, and B. Pilawa. Huge transverse magnetic polarization in the field-induced
phase of the antiferromagnetic molecular wheel CsFe8. Phys. Rev. Lett. 99, 087201 (2007).
[Sha07] R. Shaw, F. Tuna, W. Wernsdorfer, A.-L. Barra, D. Collison, and E. J. L. McInnes. Large
spin, magnetically anisotropic, octametallic vanadium(III) clusters with strong ferromagnetic
coupling. Chem. Commun. 5161–5163 (2007).
[Sin07] P. Singh, J. Fiedler, S. Zalis, C. Duboc, M. Niemeyer, F. Lissner, T. Schleid, and W. Kaim.
Spectroelectrochemistry and DFT analysis of a new {RuNO}(n) redox system with multifrequency
EPR suggesting conformational isomerism in the {RuNO}(7) state. Inorg.
Chem. 46, 9254 (2007).
[Spa07] S. Spasov, G. Allison, A. Patane, A. Ignatov, L. Eaves, D.K. Maude, M. Hopkinson, and
R. Airey. Magnetic field tuning of hot electron resonant capture in a semiconductor device.
Appl. Phys. Lett. 91, 142104 (2007).
[Stu07] S. A. Studenikin, A. S. Sachrajda, J. A. Gupta, Z. R. Wasilewski, O. M. Fedorych,
M. Byszewski, D.K. Maude, M. Potemski, M. Hilke, K. W. West, and L. N. Pfeiffer.
Frequency quenching of microwave-induced resistance oscillations in a high-mobility twodimensional
electron gas. Phys. Rev. B 76, 165321 (2007).
[Tak07] K. Takashina, M. Brun, T. Ota, D.K. Maude, A. Fujiwara, Y. Ono, Y. Takahashi, and
Y. Hirayama. Anomalous resistance ridges along filling factor ν = 4i. Phys. Rev. Lett.
99, 036803 (2007).
[The07] L. Thevenod, M. Casse, W. Desrat, M. Mouis, G. Reimbold, D.K. Maude, and
F. Boulanger. Magnetoresistance mobility extraction on TiN/HfO2/SiO2 metal-oxidesemiconductor
field effect transistors. Appl. Phys. Lett. 90, 152111 (2007).
40

[Ved07] S. I. Vedeneev, D.K. Maude, E. Haanappel, and V. P. Mineev. c-axis resistivity of Lafree
Bi2+xSr2−xCuO6+δ single crystals in high magnetic fields. Phys. Rev. B 75, 064512
(2007).
[Wan07] D. Wang, Y. Ma, Z. Yu, Z. Gao, X. Zhang, K. Watanabe, and E. Mossang. Strong
influence of precursor powder on the critical current density of Fe-sheathed MgB2 tapes.
Supercond. Sci. Technol. 20, 574 (2007).
[Woj07] A. Wojs, L. Bryja, A. Gladysiewicz, J. Misiewicz, and M. Potemski. Photoluminescence
of impurity-bound excitons and trions in magnetic fields. Int. J. Mod. Phys. B 21, 1558
(2007).
[Wys07] A. Wysmolek, R. Stepniewski, M. Potemski, B. Chwalisz-Pietka, K. Pakula, J. M. Baranowski,
D. C. Look, S. S. Park, and K. Y. Lee. Magnetopolaron effect on silicon and
oxygen donors in GaN. Int. J. Mod. Phys. B 21, 1486 (2007).
[Xu07] H. L. Xu, Y. Feng, Z. Xu, G. Yan, X. J. Wu, Z. H. Shen, E. Mossang, and A. Sulpice.
Investigation on MgB2 wires doped by ZrH2. J. Supercond. Nov. Magn. 20, 255 (2007).
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Magnetic interactions in the MnFe1−xCoxP series of solid solutions. J. Phys.-Condens.
Matter 19, 376201 (2007).
ACL 2008
[Aba08] M. Abatal, E. Chavira, C. Filippini, V. Garcia-Vazquez, J. C. Perez, and J.-L. Tholence.
Ferromagnetic behavior of the Ru1−xSr2GdCu2+xO8±z system with 0.0 < x < 1.0, synthesized
at ambient pressure. Physica C 468, 2219 (2008).
[Aro08] C. Aronica, Y. Chumakov, E. Jeanneau, D. Luneau, P. Neugebauer, A.-L. Barra,
B. Gillon, A. Goujon, A. Cousson, J. Tercero, and E. Ruiz. Structure, Magnetic Properties,
Polarized Neutron Diffraction, and Theoretical Study of a Copper(II) Cubane. Chem.-Eur.
J. 14, 9540 (2008).
[Awi08] S. Awirothananon, S. Raymond, S. Studenikin, M. Vachon, W. Render, A. Sachrajda,
X. Wu, A. Babinski, M. Potemski, S. Fafard, S. J. Cheng, M. Korkusinski, and P. Hawrylak.
Single-exciton energy shell structure in InAs/GaAs quantum dots. Phys. Rev. B 78,
235313 (2008).
[Ban08] A. Banerjee, B. Fauque, K. Izawa, A. Miyake, I. Sheikin, J. Flouquet, B. Lenoir, and
K. Behnia. Transport anomalies across the quantum limit in semimetallic Bi0.96Sb0.04.
Phys. Rev. B 78, 161103 (2008).
[Bar08] A.-L. Barra. High- and multi-frequency EPR study of Mn12: A new technique for studying
new objects. Inorg. Chim. Acta 361, 3564 (2008).
[Ber08] B. Bergk, V. Petzold, H. Rosner, S. L. Drechsler, M. Bartkowiak, O. Ignatchik, A. D.
Bianchi, I. Sheikin, P. C. Canfield, and J. Wosnitza. Anisotropic multiband many-body
interactions in LuNi2B2C. Phys. Rev. Lett. 100, 257004 (2008).
41

[Byc08] Y. A. Bychkov and G. Martinez. Magnetoplasmon excitations in graphene for filling factors
ν ≤ 6. Phys. Rev. B 77, 125417 (2008).
[Cor08] A. Cornia, L. Gregoli, C. Danieli, A. Caneschi, R. Sessoli, L. Sorace, A.-L. Barra, and
W. Wernsdorfer. Slow quantum relaxation in a tetrairon(III) single-molecule magnet.
Inorg. Chim. Acta 361, 3481 (2008).
[Dub08] C. Duboc, M.-N. Collomb, J. Pecaut, A. Deronzier, and F. Neese. Definition of magnetostructural
correlations for the Mn-II ion. Chem.-Eur. J. 14, 6498 (2008).
[Fau08] C. Faugeras, A. Nerriere, M. Potemski, A. Mahmood, E. Dujardin, C. Berger, and W. A.
de Heer. Few-layer graphene on SiC, pyrolitic graphite, and graphene: A Raman scattering
study. Appl. Phys. Lett. 92, 011914 (2008).
[Gas08] V. A. Gasparov, I. Sheikin, F. Levy, J. Teyssier, and G. Santi. Study of the fermi surface
of ZrB12 using the de Haas-van Alphen effect. Phys. Rev. Lett. 101, 097006 (2008).
[Gon08] L. Gondek, M. Guillot, A. Szytula, M. Gutowska, and J. Wieckowski. Magnetic properties
of TbPtGe2 in high magnetic field. Solid State Commun. 147, 313 (2008).
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interference in double wells in a tilted magnetic field. Phys. Rev. B 78, 155320 (2008).
[Hur08] C. Hureau, S. Groni, R. Guillot, G. Blondin, C. Duboc, and E. Anxolabehere-Mallart.
Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance,
and Density-Functional Theory Investigations on Chloro and Aqua Mn-II Mononuclear
Complexes with Amino-Pyridine Pentadentate Ligands. Inorg. Chem. 47, 9238 (2008).
[Jul08] M. H. Julien, C. de Vaulx, H. Mayaffre, C. Berthier, M. Horvatić, V. Simonet,
J. Wooldridge, G. Balakrishnan, M. R. Lees, D. P. Chen, C. T. Lin, and P. Lejay. Electronic
texture of the thermoelectric oxide Na0.75CoO2. Phys. Rev. Lett. 100, 096405 (2008).
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Slageren, C. Duboc, and J. Fiedlere. A series of metal complexes with the non-innocent
N,N ‘-bis(pentafluorophenyl)-o-phenylenediamido ligand: twisted geometry for tuning the
electronic structure. Dalton Trans. 10, 1355–1365 (2008).
[Kla08] M. Klanjsek, H. Mayaffre, C. Berthier, M. Horvatić, B. Chiari, O. Piovesana, P. Bouillot,
C. Kollath, E. Orignac, R. Citro, and T. Giamarchi. Controlling Luttinger liquid physics
in spin ladders under a magnetic field. Phys. Rev. Lett. 101, 137207 (2008).
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Field dependence of the ground state in the exotic superconductor CeCoIn5: A nuclear
magnetic resonance investigation. Phys. Rev. Lett. 101, 047004 (2008).
[Kvo08] Z. D. Kvon, D. A. Kozlov, E. B. Olshanetsky, A. E. Plotnikov, A. V. Latyshev, and
J.-C. Portal. Ultra-high Aharonov-Bohm oscillations harmonics in a small ring interferometer.
Solid State Commun. 147, 230 (2008).
42

[Laf08] F. Lafolet, S. Chardon-Noblat, C. Duboc, A. Deronzier, F. P. Pruchnik, and M. Rak.
Electrochemical fabrication and characterization of thin films of redox-active molecular
wires based on extended Rh-Rh bonded chains. Dalton Trans. 16, 2149–2156 (2008).
[Lev08] F. Levy, I. Sheikin, C. Berthier, M. Horvatić, M. Takigawa, H. Kageyama, T. Waki, and
Y. Ueda. Field dependence of the quantum ground state in the Shastry-Sutherland system
SrCu2(BO3)2. EPL 81, 67004 (2008).
[Log08a] N. Logoboy and W. Joss. Morphology of Condon domain phases in plate-like sample.
Physica B 403, 3464 (2008).
[Log08b] N. Logoboy and W. Joss. Phase bifurcations of electron gas at the conditions of diamagnetic
instability. Solid State Commun. 146, 39 (2008).
[Mai08] A. N. Maity, B. Sarkar, M. Niemeyer, M. Sieger, C. Duboc, S. Zalis, and W. Kaim.
A tetranuclear organorhenium(I) complex of the 2,3,5,6-tetrafluoro-7,7,8,8-tetracyano-pquinodimethane
radical anion, TCNQF4(center dot-). Dalton Trans. 5749–5753 (2008).
[Mak08] O. Makarovsky, O. Thomas, A. G. Balanov, L. Eaves, A. Patane, R. P. Campion, C. T.
Foxon, E. E. Vdovin, D.K. Maude, G. Kiesslich, and R. J. Airey. Fock-Darwin-Like Quantum
Dot States Formed by Charged Mn Interstitial Ions. Phys. Rev. Lett. 101, 226807
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[Mal08] A. Malagoli, V. Braccini, M. Tropeano, M. Vignolo, C. Bernini, C. Fanciulli, G. Romano,
M. Putti, C. Ferdeghini, E. Mossang, A. Polyanskii, and D. C. Larbalestier. Effect of grain
refinement on enhancing critical current density and upper critical field in undoped MgB2
ex situ tapes. J. Appl. Phys. 104, 103908 (2008).
[Mit08a] V. F. Mitrovic, M. H. Julien, C. de Vaulx, M. Horvatić, C. Berthier, T. Suzuki, and
K. Yamada. Similar glassy features in the 139 La NMR response of pure and disordered
La1.88Sr0.12CuO4. Phys. Rev. B 78, 014504 (2008).
[Mit08b] V. F. Mitrovic, G. Koutroulakis, M. Klanjsek, M. Horvatić, C. Berthier, G. Knebel,
G. Lapertot, and J. Flouquet. Comment on “Texture in the superconducting order parameter
of CeCoIn5 revealed by nuclear magnetic resonance”. Phys. Rev. Lett. 101, 039701
(2008).
[Mon08] M. Monni, I. Pallecchi, C. Ferdeghini, V. Ferrando, A. Floris, E. G. D’Agliano,
E. Lehmann, I. Sheikin, C. Tarantini, X. X. Xi, S. Massidda, and M. Putti. Probing
the electron-phonon coupling in MgB2 through magnetoresistance measurements in neutron
irradiated thin films. EPL 81, 67006 (2008).
[Nis08] A. Nish, R. J. Nicholas, C. Faugeras, Z. Bao, and M. Potemski. High-field magnetooptical
behavior of polymer-embedded single-walled carbon nanotubes. Phys. Rev. B 78, 245413
(2008).
[Nog08] A. Nogaret, J.-C. Portal, H. E. Beere, D. A. Ritchie, and C. Phillips. Microwave-induced
forward scattering and Luttinger liquid interferences in magnetically confined quantum
wires. Low Temp. Phys. 34, 853 (2008).
43

[Ols08] E. B. Olshanetsky, Z. D. Kvon, S. Sassine, J.-C. Portal, H. I. Cho, and J. H. Lee. The
weak antilocalization and quantum scattering time in a two-dimensional electron gas in
AlGaN/GaN heterostructure. Appl. Phys. Lett. 92, 242112 (2008).
[Orl08a] M. Orlita, C. Faugeras, G. Martinez, D.K. Maude, M. L. Sadowski, and M. Potemski.
Dirac fermions at the H point of graphite: Magnetotransmission studies. Phys. Rev. Lett.
100, 136403 (2008).
[Orl08b] M. Orlita, C. Faugeras, P. Plochocka, P. Neugebauer, G. Martinez, D.K. Maude,
A. L. Barra, M. Sprinkle, C. Berger, W. A. de Heer, and M. Potemski. Approaching
the Dirac Point in High-Mobility Multilayer Epitaxial Graphene. Phys. Rev. Lett. 101,
267601 (2008).
[Pag08] I. R. Pagnossin, A. K. Meikap, T. E. Lamas, G. M. Gusev, and J.-C. Portal. Anomalous
dephasing scattering rate of two-dimensional electrons in double quantum well structures.
Phys. Rev. B 78, 115311 (2008).
[Plo08] P. Plochocka, C. Faugeras, M. Orlita, M. L. Sadowski, G. Martinez, M. Potemski, M. O.
Goerbig, J. N. Fuchs, C. Berger, and W. A. de Heer. High-energy limit of massless Dirac
Fermions in multilayer graphene using magneto-optical transmission spectroscopy. Phys.
Rev. Lett. 100, 087401 (2008).
[Pug08] P. Pugnat, L. Duvillaret, R. Jost, G. Vitrant, D. Romanini, A. Siemko, R. Ballou, B. Barbara,
M. Finger, M. Finger, J. Hosek, M. Kral, K. A. Meissner, M. Sulc, J. Zicha, and
O. Collaboration. Results from the OSQAR photon-regeneration experiment: No light
shining through a wall. Phys. Rev. D 78, 092003 (2008).
[Pri08] G. Pristas, M. Reiffers, E. Bauer, A.G.M. Jansen, and D.K. Maude. Suppression of asymmetric
differential resistance in the non-Fermi-liquid system YbCu5−xAlx (x=1.3-1.75) in
high magnetic fields. Phys. Rev. B 78, 235108 (2008).
[Reb08] J.-N. Rebilly, G. Charron, E. Riviere, R. Guillot, A.-L. Barra, M. D. Serrano, J. van
Slageren, and T. Mallah. Large magnetic anisotropy in pentacoordinate Ni-II complexes.
Chem.-Eur. J. 14, 1169 (2008).
[Ren08] V. T. Renard, O. A. Tkachenko, V. A. Tkachenko, T. Ota, N. Kumada, J.-C. Portal, and
Y. Hirayama. Boundary-mediated electron-electron interactions in quantum point contacts.
Phys. Rev. Lett. 100, 186801 (2008).
[Roy08] S. Roy, M. Sieger, P. Singh, M. Niemeyer, J. Fiedler, C. Duboc, and W. Kaim. A radicalbridged
bis(ferrocenylcopper(I)) complex: Structural identity, multifrequency EPR, and
spectroelectrochemistry. Inorg. Chim. Acta 361, 1699 (2008).
[Sas08] S. Sassine, Y. Krupko, J.-C. Portal, Z. D. Kvon, R. Murali, K. P. Martin, G. Hill, and
A. D. Wieck. Experimental investigation of the ratchet effect in a two-dimensional electron
system with broken spatial inversion symmetry. Phys. Rev. B 78, 045431 (2008).
[Sar08] B. Sarkara, S. Frantz, S. Roy, M. Sieger, C. Duboc, G. Denninger, H.-J. Kuemmerer,
and W. Kaim. High-frequency EPR and structural data as complementary information on
stable radical complexes containing the semi-reduced azo function. J. Mol. Struct. 890,
133 (2008).
44

[Sch08] Q. Scheifele, C. Riplinger, F. Neese, H. Weihe, A.-L. Barra, F. Juranyi, A. Podlesnyak,
and P. L. W. Tregenna-Piggott. Spectroscopic and theoretical study of a mononuclear
manganese(III) complex exhibiting a tetragonally compressed geometry. Inorg. Chem. 47,
439 (2008).
[Set08] R. Settai, Y. Miyauchi, T. Takeuchi, F. Levy, I. Sheikin, and Y. Onuki. Huge upper
critical field and electronic instability in pressure-induced superconductor CeIrSi3 without
inversion symmetry in the crystal structure. J. Phys. Soc. Jpn. 77, 073705 (2008).
[Tak08] M. Takigawa, S. Matsubara, M. Horvatić, C. Berthier, H. Kageyama, and Y. Ueda. NMR
evidence for the persistence of a spin superlattice beyond the 1/8 magnetization plateau in
SrCu2(BO3)2. Phys. Rev. Lett. 101, 037202 (2008).
[Ved08a] S. I. Vedeneev and D.K. Maude. In-plane current-voltage characteristics and oscillatory
Josephson-vortex flow resistance in La-free Bi2+xSr2−xCuO6+δ single crystals in high magnetic
fields. Phys. Rev. B 77, 064511 (2008).
[Ved08b] S. I. Vedeneev, D.K. Maude, and J. M. Byrne. Microwave enhancement of superconductivity
in Bi2+xSr2−xCuO6+δ break junctions. Phys. Rev. B 78, 052509 (2008).
[Wie08] S. Wiedmann, G. M. Gusev, O. E. Raichev, T. E. Lamas, A. K. Bakarov, and J.-C. Portal.
Interference oscillations of microwave photoresistance in double quantum wells. Phys. Rev.
B 78, 121301 (2008).
[Zei08] S. Zein, C. Duboc, W. Lubitz, and F. Neese. A systematic density functional study of the
zero-field splitting in Mn(II) coordination compounds. Inorg. Chem. 47, 134 (2008).
ACL 2009
[Aim09] F. Aimo, S. Kraemer, M. Klanjsek, M. Horvatić, C. Berthier, and H. Kikuchi. Spin Configuration
in the 1/3 Magnetization Plateau of Azurite Determined by NMR. Phys. Rev.
Lett. 102, 127205 (2009).
[Bog09] L. Bogani, C. Danieli, E. Biavardi, N. Bendiab, A.-L. Barra, E. Dalcanale, W. Wernsdorfer,
and A. Cornia. Single-Molecule-Magnet Carbon-Nanotube Hybrids. Angew. Chem.-Int.
Edit. 48, 746 (2009).
[Bud09] M. V. Budantsev, A. G. Pogosov, A. K. Bakarov, A. I. Toropov, and J.-C. Portal. Effect of
an in-plane magnetic field on magnetoresistance hysteresis of the two-dimensional electron
gas in the integer quantum Hall effect regime. Jetp Lett. 89, 92 (2009).
[Des09] W. Desrat, S. Kamara, F. Terki, S. Charar, J. Sadowski, and D.K. Maude. Antisymmetric
magnetoresistance anomalies and magnetic domain structure in GaMnAs/InGaAs layers.
Semicond. Sci. Technol. 24, 065011 (2009).
[Dub09a] C. Duboc and M.-N. Collomb. Determination of electronic properties of manganese complexes:
the efficient combination of high field EPR spectroscopy and theoretical calculations.
Actual Chim. 19–24 (2009).
45

[Dub09b] C. Duboc and M.-N. Collomb. Multifrequency high-field EPR investigation of a mononuclear
manganese(IV) complex. Chem. Commun. 2715–2717 (2009).
[Fra09] S. Frantz, M. Sieger, I. Hartenbach, F. Lissner, T. Schleid, J. Fiedler, C. Duboc, and
W. Kaim. Structure, electrochemistry, spectroscopy, and magnetic resonance, including
high-field EPR, of {(mu-abpy)[Re(CO)(3)X]2}(circle/center dot-), where abpy=2,2
‘-azobispyridine and X = F, Cl, Br, I. J. Organomet. Chem. 694, 1122 (2009).
[Fri09] K. J. Friedland, A. Siddiki, R. Hey, H. Kostial, A. Riedel, and D.K. Maude. Quantum
Hall effect in a high-mobility two-dimensional electron gas on the surface of a cylinder.
Phys. Rev. B 79, 125320 (2009).
[Gre09] L. Gregoli, C. Danieli, A.-L. Barra, P. Neugebauer, G. Pellegrino, G. Poneti, R. Sessoli,
and A. Cornia. Magnetostructural Correlations in Tetrairon(III) Single-Molecule Magnets.
Chem. Eur. J. 15, 6456 (2009).
[Jou09] B. Jouault, M. Gryglas, M. Baj, A. Cavanna, U. Gennser, G. Faini, and D.K. Maude.
Spin filtering through a single impurity in a GaAs/AlAs/GaAs resonant tunneling device.
Phys. Rev. B 79, 041307 (2009).
[Lev09] F. Levy, I. Sheikin, C. Berthier, M. Horvatić, and M. Takigawa. Reply to the Comment
by S. E. Sebastian and N. Harrison. EPL 85, 67008 (2009).
[Nog09] A. Nogaret, J.-C. Portal, H. E. Beere, D. A. Ritchie, and C. Phillips. Quantum interference
of magnetic edge channels activated by intersubband optical transitions in magnetically
confined quantum wires. J. Phys.-Condens. Matter 21, 025303 (2009).
[Orl09] M. Orlita, C. Faugeras, J. M. Schneider, G. Martinez, D. K. Maude, and M. Potemski.
Graphite from the Viewpoint of Landau Level Spectroscopy: An Effective Graphene Bilayer
and Monolayer. Phys. Rev. Lett. 102, 166401 (2009).
[Pal09] I. Pallecchi, C. Fanciulli, M. Tropeano, A. Palenzona, M. Ferretti, A. Malagoli, A. Martinelli,
I. Sheikin, M. Putti, and C. Ferdeghini. Upper critical field and fluctuation conductivity
in the critical regime of doped SmFeAsO. Phys. Rev. B 79, 104515 (2009).
[PB09] V. Paul-Boncour, S. M. Filipek, R. Wierzbicki, G. Andre, F. Bouree, and M. Guillot.
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Physica E 40, 1374 (2008). 17th International Conference on Electronic Properties of Two-
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Shubnikov de Haas oscillations in double wells with opposite signs of the electronic gfactor.
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F. Boulanger. Mobility of strained and unstrained short channel FD-SOI MOSFETs: New
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Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance,
and Density-Functional Theory Investigations on Chloro and Aqua Mn-II Mononuclear
Complexes with Amino-Pyridine Pentadentate Ligands. Inorg. Chem. 47, 9238 (2008).
[Isn08] O. Isnard and M. Guillot. On the magnetic properties of RFe11TiHx compounds. J. Optoelectron.
Adv. Mater. 10, 744 (2008). 5th International Conference on New Research
Trends in Materials Science, Sibiu, ROMANIA, SEP, 2007.
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quantum dot. J. Phys.-Condens. Matter 20, 454213 (2008). 15th International
Winterschool on New Developments in Solid State Physics, Bad Hofgastein, GERMANY,
FEB 18-22, 2008.
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M. Soubiran, and L. Tavian. Commissioning the cryogenic system of the first LHC sector.
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eds., ADVANCES IN CRYOGENIC ENGINEERING, VOLS 53A AND 53B, vol. 985 of
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[Mit08] V. F. Mitrovic, G. Koutroulakis, M. A. Vachon, M. Horvatić, C. Berthier, G. Lapertot,
and J. Flouquet. Phase diagram of CeCoIn5 in the vicinity of Hc2 as determined by NMR.
Physica B 403, 986 (2008). International Conference on Strongly Correlated Electron
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[Oen08] Y. Oener, V. Goruganti, O. Kamer, M. Guillot, and J. H. Ross, Jr. Electrical transport,
heat capacity, and high-field magnetization study in intermetallic Ni2CeSn compound. J.
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[Orl08] M. Orlita, C. Faugeras, G. Martinez, D. K. Maude, M. L. Sadowski, J. M. Schneider, and
M. Potemski. Magneto-transmission as a probe of Dirac fermions in bulk graphite. J.
Phys.-Condens. Matter 20, 454223 (2008). 15th International Winterschool on New Developments
in Solid State Physics, Bad Hofgastein, GERMANY, FEB 18-22, 2008.
[Pio08] B. A. Piot, D. K. Maude, M. Henini, Z. R. Wasilewski, J. A. Gupta, U. Gennser, A. Cavanna,
D. Mailly, R. Airey, and G. Hill. Determination of the Landau level shape via the
transition to the spin polarized state in the integer quantum Hall effect. Physica E 40,
1200 (2008). 17th International Conference on Electronic Properties of Two-Dimensional
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[Ren08] V. T. Renard, O. A. Tkachenko, V. A. Tkachenko, T. Ota, N. Kumada, J.-C. Portal,
and Y. Hirayama. Electron-electron interactions in clean quantum point contacts in the
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large conductance regime. Physica E 40, 1684 (2008). 17th International Conference on
Electronic Properties of Two-Dimensional Systems, Genoa, ITALY, JUL 15-20, 2007.
[Sar08] P. Saraiva, A. Nogaret, Y. Krupko, J.-C Portal, H. Beere, and D. Ritchie. Photoresistance
oscillations of magnetic quantum wires. Physica E 40, 1436 (2008). 17th International
Conference on Electronic Properties of Two-Dimensional Systems, Genoa, ITALY, JUL
15-20, 2007.
[Sas08] S. Sassine, Y. Krupko, Z. D. Kvon, J.-C. Portal, R. Murali, K. P. Martin, G. Hill, and
A. D. Wieck. Polarized-microwave control of directed transport in a 2D electron gas with
artificial asymmetrical scatterers. Physica E 40, 2043 (2008). 13th International Conference
on Modulated Semiconductor Structures (MSS13)/17th International Conference on
Electronic Properties of 2-Dimensional Systems, Genova, ITALY, JUL 15-20, 2007.
[Set08] R. Settai, T. Endo, T. Fujie, Y. Onuki, D. Aoki, and I. Sheikin. De Haas-van Alphen
effect in CeTl3 under pressure. Physica B 403, 766 (2008). International Conference on
Strongly Correlated Electron Systems (SCES 2007), Houston, TX, MAY 13-18, 2007.
[Sie08] A. Siemko and P. Pugnat. Performance evaluation and quality assurance management
during the series power tests of LHC main lattice magnets. IEEE Trans. Appl. Supercond.
18, 126 (2008). 20th International Conference on Magnet Technology, Philadelphia, PA,
AUG 27-31, 2007.
[Stu08] S. A. Studenikin, CO. N. Fedorych, D. K. Maude, M. Potemski, A. S. Sachrajda, Z. R.
Wasilewski, J. A. Gupta, and L. I. Magarill. A quasi-classical mechanism for microwave induced
resistance oscillations in high mobility GaAs/AlGaAs 2DEG samples. Physica E 40,
1424 (2008). 17th International Conference on Electronic Properties of Two-Dimensional
Systems, Genoa, ITALY, JUL 15-20, 2007.
[Sur08] K. Surowiecka, A. Wysniolek, R. Stepniewski, M. Potemski, and M. Henini. Time Resolved
Magnet ophotoluminescence of Biased GaAs/AlGaAs Double Quantum Well Structure.
Acta Phys. Pol. A 114, 1369 (2008). 37th International School on the Physics of
Semiconducting Compounds, Jaszowiec, POLAND, JUN 07-13, 2008.
[Zha08] F. Zhang, Y. Xu, M. Guillot, and J. H. Yang. Theoretical investigation of the magnetic
and magneto-optical properties of neodymium trifluoride under high magnetic field. J.
Appl. Phys. 103, 07D307 (2008). 52nd Annual Conference on Magnetism and Magnetic
Materials, Tampa, FL, NOV 05-09, 2007.
ACTI 2009
[Aba09] R. Ababei, Y.-G. Li, O. Roubeau, M. Kalisz, N. Brefuel, C. Coulon, E. Harte, X. Liu,
C. Mathoniere, and R. Clerac. Bimetallic cyanido-bridged magnetic materials derived
from manganese(III) Schiff-base complexes and pentacyanidonitrosylferrate(II) precursor.
New J. Chem. 33, 1237 (2009). 3rd International Symposium on Molecular Materials,
Toulouse, FRANCE, JUL, 2008.
[Arm09] L. E. G. Armas, G. M. Gusev, T. E. Lamas, A. K. Bakarov, and J.-C. Portal. Quantum
Hall Fferromagnt in a Double Well with vanishing g-factor. Int. J. Mod. Phys. B 23,
64

2933 (2009). 18th International Conference on High Magnetic Fields in Semiconductor
Physics and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08, 2008.
[Bab09] A. Babinski, A. Golnik, J. Borysiuk, S. Kret, P. Kossacki, J. A. Gaj, S. Raymond,
M. Potemski, and Z. R. Wasilewski. Three-dimensional localization of excitons in the
InAs/GaAs wetting layer - magnetospectroscopic study. Phys. Status Solidi B-Basic Solid
State Phys. 246, 850 (2009). 5th International Conference on Semiconductor Quantum
Dots, Gyeongju, SOUTH KOREA, MAY 11-16, 2008.
[Bry09] L. Bryja, A. Wojs, J. Misiewicz, P. Plochocka, M. Potemski, D. Reuter, and
A. Wieck. Photoluminescence Studies of Positively Charged Excitons in Asymmetric
GaAs/Ga1−xAlxAs Quantum Wells with a two-dimensional Hole Gas. Int. J. Mod. Phys.
B 23, 2718 (2009). 18th International Conference on High Magnetic Fields in Semiconductor
Physics and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08, 2008.
[Dan09] C. Danieli, A. Cornia, C. Cecchelli, R. Sessoli, A.-L. Barra, G. Ponterini, and B. Zanfrognini.
A Novel Class of Tetrairon(III) SingleMolecule Magnets with GrapheneBinding
Groups. Polyhedron 28, 2029 (2009).
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Splitting and g-factor in AlAs Quantum Wells. Int. J. Mod. Phys. B 23, 2948 (2009).
18th International Conference on High Magnetic Fields in Semiconductor Physics and
Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08, 2008.
[Fed09] O. M. Fedorych, S. A. Studenikin, S. Moreau, M. Potemski, T. Saku, and Y. Hirayama.
Microwave Magnetoplasmon Absorption by a 2DEG Stripe. Int. J. Mod. Phys. B 23, 2698
(2009). 18th International Conference on High Magnetic Fields in Semiconductor Physics
and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08, 2008.
[Lev09] F. Levy, I. Sheikin, B. Grenier, C. Marcenat, and A. Huxley. Coexistence and interplay of
superconductivity and ferromagnetism in URhGe. J. Phys.-Condens. Matter 21, 164211
(2009). 25th International Conference on Low Temperature Physics (LT25), Amsterdam,
NETHERLANDS, AUG 06-13, 2008.
[Pot09] M. Potemski. Landau Level Spectroscopy of Dirac-like Fermions in Multilayer Graphene.
Int. J. Mod. Phys. B 23, 2665 (2009). 18th International Conference on High Magnetic
Fields in Semiconductor Physics and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08,
2008.
[Wie09] S. Wiedmann, G. M. Gusev, O. E. Raichev, T. E. Lamas, A. K. Bakarov, and J.-C. Portal.
Magnetoresistance Oscillations In Double Quantum Wells under Microwave Irradiation.
Int. J. Mod. Phys. B 23, 2943 (2009). 18th International Conference on High Magnetic
Fields in Semiconductor Physics and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08,
2008.
[Woj09] A. Wojs, L. Bryja, and M. Potemski. Effects of Ionized ImpuritiesS on Binding and
Recombination of Positive and Negative Quasi-two-Dimensional Magneto-Trions. Int. J.
Mod. Phys. B 23, 2964 (2009). 18th International Conference on High Magnetic Fields
in Semiconductor Physics and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08, 2008.
65

[Wys09a] A. Wysmolek, M. Kaminska, A. Twardowski, M. Potemski, M. Bockowski, and I. Grzegory.
Magneto-Luminescence of Gadolinium Doped Gallium Nitride. Int. J. Mod. Phys. B
23, 2994 (2009). 18th International Conference on High Magnetic Fields in Semiconductor
Physics and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08, 2008.
[Wys09b] A. Wysmolek, R. Stepniewski, K. Wardak, J. Baranowski, M. Potemski, E. Tymicki, and
K. Grasza. 1.4 eV - Luminescence Band IN 6H-SIC: Symmetry of the Associated Defect.
Int. J. Mod. Phys. B 23, 3019 (2009). 18th International Conference on High Magnetic
Fields in Semiconductor Physics and Nanotechnology, Sao Pedro, BRAZIL, AUG 03-08,
2008.
66

ACLN
2008
1 T. Thuillier, L. Latrasse, T. Lamy, C. Fourel, J. Giraud, C. Trophime, P. Sala, J. Dumas, F. Debray
High frequency ECR source (60 GHz) in pre-glow mode for bunching of beta-beam isotopes
10th Int. Workshop on Neutrino Factories, Super beams and Beta beams Valencia, Spain 30 June – 05 July
2008, proceeding of science
2 T. Thuillier, L. Latrasse, T. Lamy, C. Fourel, J. Giraud, C. Trophime, P. Sala, J. Dumas, F. Debray
60 GHz electron cyclotron resonance ion source for beta-beams
18th International Workshop on ECR Ion Sources (ECRIS08), États-Unis d'Amérique (2008), TUCOA03
131-5 Proceedings of the ECRIS08
2007
1 Budantsev M.V., A.G. Pogosov and J.C. Portal
Piecewise parabolic magnetoresistance of the 2DEG with periodical lattice of scatterers
Proc. 15 th Int. Symp. “Nanostructures: Physics and Technology”, Novosibirsk, Russia, June 2007, eds. N.
Vsesvetskii, L. Solovyova, published by Ioffe Physico-Technical Institute, p.349, St Petersburg 2007
2 Li C.S, E. Mossang_, B. Bellin, A. Sulpice, A. Antonevici, P.X. Zhang
Transverse compressive stress effects on the critical current of Bi-2223 tapes
2006 Beijing International Materials Week, PTS 1-4-Magnesium-Aluminium Materials-Aerospace
Materials-Superconducting and Functional Materials, Book Series: Materials Science Forum, Vol. 546-549,
P. 1923-1926, Part: 1-4, Published: 2007, Article Number: ISSN 0255-5476
3 Sassine S., Yu. Krupko, E.B. Olshanestsky, Z.D. Kvon, J.C. Portal, J.M. Hartmann and J. Zhang
Collective response of a 2DEG in a Si/SiGe heterostructure under microwave radiation
Proc. 15 th Int. Symp. “Nanostructures: Physics and Technology”, Novosibirsk, Russia, June 2007, eds. N.
Vsesvetskii, L. Solovyova, published by Ioffe Physico-Technical Institute, p.355, St Petersburg 2007
4 Sassine S., Yu. Krupko, Z.D. Kvon, V.T. Renard, J.C. Portal, R. Murali, K.P. Martin, G. Hill and A.D.
Wieck
“Ratchet” effect in alton-board-like 2DES with broken spatial inversion symmetry
Proc. 15 th Int. Symp. “Nanostructures: Physics and Technology”, Novosibirsk, Russia, June 2007, eds. N.
Vsesvetskii, L. Solovyova, published by Ioffe Physico-Technical Institute, p.14, St Petersburg 2007
5 Yan G., Y.F. Lu, Y. Feng, P. X. Zhang, L. Zhou, A. Sulpice, E. Mossang
Effect of heat treatment on superconducting properties of pure and Ti, Zr-doped MgB_2 superconducting
wires fabricated by in-situ PIT method
2006 Beijing International Materials Week, PTS 1-4-Magnesium-Aluminium Materials-Aerospace
Materials-Superconducting and Functional Materials, Book Series: Materials Science Forum, Vol. 546-549,
p.1913-1918, Part: 1-4, Published: 2007, Article Number: ISSN 0255-5476
2006
1 Carpenter B.A., L.R.Wilson, M.L.Sadowski, E.A.Zibik, M.S.Skolnich, J.W.Cockburn,
M.J.Steer and M.Hopkinson
Carrier population effects on polaron states in InAs-GaAs self-asembled quantum dots
Narrow Gap Semiconductors 2005, eds. J.Kono, J.Léotin, IOP Conf. Series
187, p.526 (Taylon and Franics 2006)
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2 Sadowski J., J.Z. Domagala, J. Kanski, C.H. Rodriguez, F. Terki, S. Charar, and D.K. Maude
How to make GaMnAs with a high ferromagnetic phase transition temperature ?
Mater. Sci Pol. 24, 617-625 (2006)
3 Tkachenko V.A., D.V.Sheglov, Z.D.Kvon, E.B.Olshanetsky, A.V.Latyshev, A.I.Toropov, O.A.Tkachenko,
J.C.Portal and A.L.Aseev
Recordingly small Aharonov-Bohm interferometer fabricated by local anodic oxidation
14 th
Int. Symp. "Nanostructures: Physics and Technology", St Petersburg, Russia, June 2006, ed. Ioffe
Institute, p.1, 2006
2005
1 Chwalisz B., A.Wysmolek, R.Stepniewski, A.Babinski, M.Potemski and V.Thierry-Mieg
Magneto-luminescence of a single lateral island formed in the type-II GaAs/AlAs quantum well
Proc. 16 th
Int. Conf. on High Magnetic Fields in Semiconductor Physics, Tallahassee, USA, August 26,
2004, eds. Y.J.Wang, L.Engel, N.Bonestel (World Scientific Publishing, Singapore, 2005), p.359
2 Goran A.V., A.A.Bykov, A.K.Bakarov, A.K.Kalagin, A.V.Latyshev, A.I.Toropov and J.C.Portal
Anisotropy of transport of 2D electron gas in parallel magnetic field
Proc. 13 th
Int. Symp. Nanostructures Physics and Technology, St Petersburg, Russia, ed. Ioffe
Institute 2005, p.407
3 Morozova E.N., V.Renard, Yu.V.Dubrovskii, V.A.Volkov, L.Eaves, J.C.Portal, O.N.Makarovskii, M.Henini
and G.Hill
Tunneling between twodimensional hole layers in GaAs
Proc.13 th
Int. Symp. Nanostructures Physics and Technology, St Petersburg, Russia, ed. Ioffe Institute 2005,
p.169
4 Nomokonov D.V., A.A.Bykov, A.K.Bakarov, A.K.Kalagin, A.I.Toropov and J.C.Portal
Temperature dependence of the Aharonov-Bohm effect in chiral Fermi-system
Proc. 13 th
Int. Symp. Nanostructures Physics and Technology, St Petersburg, Russia, ed. Ioffe
Institute 2005, p.197
5 Olshanetsky E.B., V.T.Renard, Z.D.Kvon, J.C.Portal and J.M.Hartmann
Electron transport through antidot superlatices in Si/Si0.7Ge0.3 heterostructures: New lattice-induced
magnetoresistance oscillations at low magnetic fields
Proc. 13 th
Int. Symp. Nanostructures Physics and Technology, St Petersburg, Russia, ed. Ioffe Institute 2005,
p.209
6 Olshanetsky E.B., Z.D.Kvon, D.V.Sheglov, A.V.Latyshev, A.I.Toropov, V.Renard and J.C.Portal
The effect of the microscopic state of a ballistic ring on the Aharonov-Bohm oscillations temperature
dependence
Proc. 16 th
Int. Conf. High Magnetic Fields in Semiconductor Physics, 2004, eds. Y.J.Wang, L.Engel,
N.Bonestell, World Scientific 2005, p.45
7 Raymond S., S.Studenikin, A.Sachrajda, Z.Wasilewski, S.J.Cheng, W.Sheng, P.Hawrylak, A.Babinski,
M.Potemski, G.Ortner and M.Bayer
Excitonic Fock-Darwin spectra from electronhole droplets in self-assembled quantum dots
Proc. Int. Symp. on Nanoscale Devices and Materials, 206 th Meeting of the Electrochemical Society, Inc.
(Honolulu, USA, October 34, 2004) ed. M.Cahay et al. (The Electrochemical Society, Inc., Pennington
2005), p.23
68

8 Renard V.T., O.A.Tkachenko, Z.D.Kvon, E.B.Olshanetsky, A.I.Toropov, J.C.Portal and I.V.Gornyi
Observation of quantum corrections to the transport coefficients of a 2DEG up to 110 K
Proc. 13 th
Int. Symp. Nanostructures Physics and Technology,St Petersburg, Russia, ed. Ioffe Institute 2005,
p.401
9 Sokolov A.V., V.Renard, D.Yu.Ivanov, Yu.V.Dubrovskii, J.C.Portal, L.Eaves, E.E.Vdovin, M.Henini
and G.Hill
Metal-insulator type transition in tunnelling between 2D electron systems induced by in-plane magnetic field
Proc. 13 th
Int. Symp. Nanostructures Physics and Technology, St Petersburg, Russia, ed. Ioffe Institute 2005,
p.418
10 Tkachenko O.A., V.A.Tkachenko, Z.D.Kvon, D.G.Baksheev, J.C.Portal and A.L.Aseev
Steering of electron wave in three terminal small quantum dot
Proc. 13 th
Int. Symp. Nanostructures Physics and Technology, St Petersburg, Russia, ed. Ioffe Institute 2005,
p.8
11 Tkachenko O.A., V.A.Tkachenko, D.G.Baksheev and J.C.Portal
Mesoscopical behavior of Aharonov-Bohm effect in small ring interferometer
Proc. 13 th
Int. Symp. Nanostructures Physics and Technology, St Petersburg, Russia, ed. Ioffe Institute 2005,
p.205
12 Zhang Y.Z., Z.Wang, D.N.Zheng, H.H.Wen, Z.X.Zhao, J.F. de Marneffe, R.Deltour, A.G.M.Jansen
and P.Wyder
Anisotropic properties of Bi-2201 thin films grown on vicinal substrates
Modern Phys. Lett. B 19, 585-588 (2005)
69

INV
2009
1 2009 APS March Meeting
16-20 March 2009, Pittsburgh, PA, USA
Landau level spectroscopy of Dirac fermions in multilayer epitaxial graphene, graphite and graphene
M. Potemski
2 International Workshop on the Emergence of Inhomogeneous Phases in Strongly Correlated Electron
Systems
30 June - 3 July 2009, Paris, France
Coexistence of magnetic order and superconductivity in high temperature superconductors
M.-H. Julien, H. Mayaffre, V.F. Mitrović, M. Horvatić C. Berthier, K. Yamada, T.Suzuki, J.L Luo, N.L.
Wang
3 The 9th International Conference on Research in High Magnetic Fields (RHMF 2009)
22-25 July 2009, Dresden, Germany
New NMR insights into plateaus, BEC and other "exotic" phases in quantum spin systems
Horvatić Mladen, Berthier Claude, Krämer Steffen, Aimo Francesco, Raivo Stern, Takigawa Masashi,
Matsubara Shinichi
4 International workshop on “Emergent phenomena in quantum Hall systems”
25 - 28 June 2009, Villa Guinigi, Capannori (Lucca), Italy
http://epqhs3.sns.it/home.shtml
M. Potemski
5 International workshop on “Recent progress in graphene research”
Seoul, Korea, June 29 – July 2, 2009
http://workshop.kias.re.kr/RPGR/
M. Potemski
6 Neuvièmes journées de cryogénie et de supraconductivité
25-27 mars 2009, Aussois, France
Champ magnétiques intenses et développement technologiques
F. Debray
7 Training school of magneto-sciences, cost P17/GDRE GAMAS Riga
18-22 mai 2009, Latvia
High field Magnet for magneto-sciences
F. Debray
2008
1 Deutsche Physikalische Gesellschaft Spring Meeting
25-29 February 2008, Berlin
High Field NMR in Low Dimensional Quantum Antiferromagnets
C. Berthier, H. Mayaffre, M. Klanjšek, S. Krämer, M. Horvatić, M.Takigawa
70

2 6 th Conference on Physical Phenomena in High Magnetic Fields (PPHMF-VI)
1-6 August 2008, Laulasmaa, Tallinn, Estonia
New NMR Insights in Quantum Spin Systems: SrCu2(BO3)2 and CuBr4(C5H12N)2
M. Horvatić, C. Berthier, S. Krämer, M. Takigawa, S. Matsubara, T. Waki, H. Kageyama, Y. Ueda, M.
Klanjšek, H. Mayaffre, O. Piovesana, T. Giamarchi
3 6 th Conference on Physical Phenomena in High Magnetic Fields (PPHMF-VI)
1-6 August 2008, Laulasmaa, Tallinn, Estonia
High-field NMR Studies of the Modulated BEC in BaCuSi2O6 and the Frustration Driven Magnetization
Plateau of Cu3(CO3)2(OH)2
S. Krämer, M. Horvatić, C. Berthier, R. Stern, T. Kimura, I. Fisher, M. Klanjšek, F. Aimo, H. Kikuchi
4 6 th Conference on Physical Phenomena in High Magnetic Fields (PPHMF-VI)
Field-induced Re-entrant Superconductivity in Ferromagnetic URhGe
I. Sheikin, A.D. Huxley, F. Levy
5 6 th Conference on Physical Phenomena in High Magnetic Fields (PPHMF-VI)
HF-EPR for the study of Single-Molecule Magnets anisotropy
A.L. Barra, A. Cornia, D. Gatteschi, R. Sessoli, L. Sorace
6 25th International Conference on Low Temperature Physics (LT25)
Amsterdam, Netherlands, AUG 06-13, 2008.
Coexistence and interplay of superconductivity and ferromagnetism in URhGe
F. Levy, I. Sheikin, B. Grenier, C. Marcenat, A. Huxley
7 International Conference on Strongly Correlated Electron Systems (SCES 2008)
Buzios, Brazil, AUG 17-22, 2008.
Bismuth Beyond the Quantum Limit
Kamran Behnia, Benoit Fauqué, Aritra Banerjee, Luis Balicas, Ilya Sheikin, Yakov Kopelevich
8 International Conference on Strongly Correlated Electron Systems (SCES 2008)
Buzios, Brazil, AUG 17-22, 2008.
Fulde-Ferrel-Larkin-Ovchinnikov State in the Organic Superconductor κ-(BEDT-TTF)2Cu(NCS)2
A. Demuer, R. Lortz, Y. Wang, I. Sheikin, B. Bergk, J. Wosnitza, Y. Nakazawa
9 Correlated Electron Systems in High Magnetic Fields
13-17 October 2008, Dresden, Germany
New NMR insights into plateaus, BEC and other "exotic" phases in quantum spin systems
M. Horvatić
10 Correlated Electron Systems in High Magnetic Fields
13-17 October 2008, Dresden, Germany
From Luttinger Liquid to Bose Einstein Condensation in coupled spin ladders.
M. Klanjšek, H. Mayaffre, C. Berthier, M. Horvatić, T. Giamarchi
11 Correlated Electron Systems in High Magnetic Fields
13-17 October 2008, Dresden, Germany
Landau level spectroscopy of Dirac Fermions in multilayer graphene and graphite
M. Potemski
12 7th PAMIR International Conference on Fundamental and Applied MHD
8-12 September 2008, Giens - France,
Magnet development at the Grenoble High Magnetic Field Laboratory
F. Debray
71

2007
1 International Conference on Strongly Correlated Electron Systems 2007
13-18 May 2007, Houston, Etats−Unis
Spin susceptibility in the FFLO phase in CeCoIn5,
V.F. Mitrović, G. Koutroulakis, M. Horvatić, C. Berthier, G. Knebel, G. Lapertot, J. Flouquet
2 International School on Magnetic Fields for Science
27 Aug.-8 Sept. 2007, Cargèse, France
High Field NMR: Application to Solid State Physics
C. Berthier
3 10ème Journée Rhône−Alpes de RMN
5 Octobre 2007, Charavines (38), FRANCE
High resolution solid state NMR in resistive magnets at Grenoble High Magnetic Field Laboratory
(GHMFL),
S.Krämer, C. Berthier, M. Horvatić, C. Chauvin, F. Debray, C. Trophime, N. Vidal, P. Petmezakis, A.
Richard, P. Sala
4 2 nd Meeting Grenoble CNRS−Beijing IoP/Chineese academy of Science
19-21 November 2007, Beijing, Chine
High Field NMR in Low Dimensional Quantum Antiferromagnets,
C. Berthier, M. Horvatić, S. Krämer, M. Takigawa, S. Matsubara, R. Stern, H. Kageyama, Y. Ueda, T.
Kimura
5 2 nd Meeting Grenoble CNRS−Beijing IoP/Chineese academy of Science
19-21 November 2007, Beijing, Chine
High-Field EPR for the study of Single-Molecule Magnets,
A.L. Barra
6 2 nd Meeting Grenoble CNRS−Beijing IoP/Chineese academy of Science
19-21 November 2007, Beijing, Chine
The Grenoble High magnetic Field laboratory facility
J.-L. Tholence
7 4th International Symposium on High Magnetic Field Spin Science in 100 T
26-28 Nov. 2007, Sendai Japon
High Field NMR in Low Dimensional Antiferromagnets,
C. Berthier, M. Horvatić, S. Krämer, M. Takigawa, S. Matsubara, R. Stern, H. Kageyama, Y. Ueda, T.
Kimura
8 4th International Symposium on High Magnetic Field Spin Science in 100 T
Field-induced Re-entrant Superconductivity in Ferromagnetic URhGe. 4th,
I. Sheikin, A.D. Huxley, F. Levy
9 Japan-France Cooperative Science Program Seminar on Materials Processing under Magnetic Field
20-23 May 2007, NANCY, France
High field magnet development at the GHMFL
F. Debray
72

2006
1 "Nanoelectronic 2006" International Conference
Lancaster, UK, 811 January, 2006
Crossing of Landau levels of a 2DEG in dilute magnetic semiconductor quantum wells
Potemski M.
2 EUROMAR 2006,
16-21 July 2006, York, United Kingdom
Ultra High Field NMR and Field Induced Quantum Phase Transitions
C. Berthier, M. Horvatić
3 17 th
Conf. on High Magnetic Fields in Semiconductor Physics
Würzburg, Germany July 30 - August 4, 2006
Spectroscopic studies of semiconductor structures in high magnetic fields
Potemski M.
4 17 th
Conf. on High Magnetic Fields in Semiconductor Physics
Würzburg, Germany July 30 - August 4, 2006
Infrared spectroscopy of twodimensional electrons in epitaxial graphene
Sadowski M.L., G.Martinez, M.Potemski, C.Berger and W.A.de Heer
5 Yamada Conference LX on Research in High Magnetic Fields RHMF 2006
16-19 August 2006, Sendai, Japan
High Field Phase Diagram of the Frustrated 2D Dimer Spin System SrCu2(BO3)2
M. Takigawa, S. Matsubara, M. Horvatić, C. Berthier, H. Kageyama
6 Yamada Conference LX on Research in High Magnetic Fields RHMF 2006
High magnetic field facility in Grenoble
Aubert G., F.Debray, J.Dumas, W.Joss, S.Krämer, G.Martinez, E.Mossang, P.Petmezakis, P.Sala,
J.L.Tholence, C.Trophime and N.Vidal
7 Training school on NMR, MRI, μSR and Mössbauer techniques (in the framework of the European
Network of Excellence MAGMANet)
17-30 September 2006, Pavia, Italy
NMR in high magnetic fields
M. Horvatić
8 Workshop on Synchrotron Applications of High Magnetic Fields
Grenoble, France, NOV 16-17, 2006
Strong electron correlations in high magnetic field.,.
I. Sheikin
2005
1 The Canadien Institute for Advanced Research Nanoelectronics Program Meeting
Banff, Alberta, Canada, 1720 March, 2005
Optical spectroscopy of semiconductor quantum dots in magnetic fields
Potemski M.
2 Réunion du GDR 2757 "Nouveaux états électroniques des matériaux" (NEEM)
10–13/05/2005, Batz sur Mer, France
Magnétisme Quantique vu à travers la RMN: Quoi de neuf ?
M. Horvatić, C. Berthier, R. Stern, H. Kikuchi, A. Comment, M. Jansen
73

3 International workshop on "Electron interactions in semiconductor nanostructures"
Bad-Honnef, Germany, May 29 – June 1, 2005
Quantum dot excitons in GaAs/AlAs double layer structures
Potemski M.
4 Colloquium "Science in High Magnetic Fields"
13–14/06/2005, Grenoble, France
Quantum Magnetism Revealed by High-Field NMR
M. Horvatić and C. Berthier
5 Colloquium "Science in High Magnetic Fields"
13–14/06/2005, Grenoble, France
High Magnetic fields for Science
C. Berthier and M. Potemski
6 Colloquium "Science in High Magnetic Fields"
13–14/06/2005, Grenoble, France
High field EPR for biologists and chemists
C. Duboc, A.-L. Barra
7 International Symposium on Molecular Conductors ISMC 2005
17–21/07/2005, Hayama, Japan
Field Induced Phase Transitions in Quantum Spin Systems and low dimensional organic conductors
C. Berthier, M. Horvatić, H. Mayaffre, V.F. Mitrović, S. Krämer, K. Kodama, M. Takigawa, R. Stern
8 24th International Conference on Low Temperature Physics (LT24)
10–17/08/2005, Orlando, Florida, USA
NMR Studies on Magnetization Plateaus in Dimer Spin Systems
M. Takigawa, K. Kodama, M. Horvatić, C. Berthier, H. Kageyama, Y. Ueda, and H. Tanaka
9 Physical Phenomena at High Magnetic Fields, PPHMF-V
5-9/08/2005, Tallahassee, Florida, USA
The Grenoble High Magnetic Field Laboratory: A user facility
W. Joss
10 International ICAM Workshop "NMR/EPR of Correlated Electron Superconductors"
15-21 October 2005, Dresden, Germany
Electronic ground states in NaxCoO2 probed by NMR
M.-H. Julien, C. de Vaulx, H. Mayaffre, M. Horvatić C. Berthier, C.T. Lin, P. Lejay
11 Meeting on Neutron scattering in High Magnetic Fields
October 2005, Grenoble France
Neutron scattering in steady high magnetic fields
W. Joss
74

COM
2009
1 ESF-WFW Conference in Partnership with LFUI “Graphene Week 2009”
Obergurgl, Austria, 2-7 March, 2009
Electronic properties of graphitic layers: magnetic field studies
http://www.esf.org/index.php?id=5255
M. Potemski
2 6èmes Journées scientifiques de l’Association Française de RPE (ARPE)
Mars 2009, Autrans
Combination of EPR and quantum chemistry for elucidating the electronic structure of mononuclear Mn(II)
complexes
C. Duboc, M.-N. Collomb, F. Neese
3 6èmes Journées scientifiques de l’Association Française de RPE (ARPE)
Mars 2009, Autrans
Magnetostructural Correlations in Tetrairon(iii) Single-Molecule Magnets
L. Gregoli, C. Danieli, A.L. Barra, P. Neugebauer, G. Pellegrino, G. Poneti, R. Sessoli, and A. Cornia
4 2009 APS March Meeting
16-20 March 2009, Pittsburgh, PA, USA
Controlling Luttinger Liquid Physics in Spin Ladders under Magnetic Field
C. Berthier, M. Klanjšek, M. Horvatić, H. Mayaffre, B. Chiari, O. Piovesana, P. Bouillot, T. Giamarchi, C.
Kollath, E. Orignac, R. Citro
5 2009 APS March Meeting
16-20 March 2009, Pittsburgh, PA, USA
Coexistence of Superconducting and Magnetic Order in CeCoIn5
Georgios Koutroulakis, Vesna Mitrović, Mladen Horvatić, Claude Berthier, Gerard Lapertot,
Jacques Flouquet
6 2009 APS March Meeting
16-20 March 2009, Pittsburgh, PA, USA
BEC of triplon in the complex quantum spin liquid BaCuSi2O6
Raivo Stern, Steffen Krämer, Mladen Horvatić, Ivo Heinmaa, Enno Joon, Claude Berthier,
Tsuyoshi Kimura, Joel Mesot
7 Journées scientifiques de l’IMBG
Avril 2009, Autrans
Investigation of the electronic properties of mononuclear Mn(II) complexes by multifrequency EPR and DFT
C. Duboc, M.-N. Collomb, F. Neese
8 Joint European Japanese Conference: Frustration in Condensed Matter
12-15 May 2009, Lyon, France
Frustration Induced New Quantum Phase in the Han Purple compound BaCuSi2O6
S. Krämer, R. Stern, M. Horvatić, C. Berthier, F. Aimo, T. Kimura
75

9 The 9th International Conference on Research in High Magnetic Fields (RHMF 2009)
22-25 July 2009, Dresden, Germany
Towards General Purpose NMR in Ultrahigh Magnetic Fields up to 34 T
S. Krämer, M. Horvatić, C. Berthier, M. Klanjšek, F. Aimo, P.-H. Fries, O. Pauvert, A. Rakhmatullin, C.
Bessada and D. Massiot
10 4th JAEA Synchrotron Radiation Research Symposium: X-ray and High Magnetic Field
5-7 March 2009 at SPring-8, JAPAN
Design study of high field continuous magnets suitable for diffraction experiments
F. Debray, J. Dumas, S. Labbé-Lavigne, C. Trophime, N. Vidal, G. Rikken,
F. Wilhelm, M. Enderle
11 Final EURISOL Town Meeting
30 March – 1 April 2009, Pisa, Italy
60 GHz Electron Cyclotron Resonance (ECR) Ion Source Prototype: calculus of the magnetic structure and
CAD Design,
L. Latrasse, T. Lamy, T. Thuillier, C. Trophime, F. Debray, J. Dumas, P. Sala, C. Fourel and J. Giraud,
2008
1 IUPAP Cross-Disciplinary
Toronto, Canada, 14-16 February, 2008
Symposium on “Ultracold Nanomatter ”
Bose Einstein condensation of excitons but optics of semiconductor quantum dots
http://www.yorku.ca/ucn2008/
M. Potemski
2 Club Métalloprotéines et Modèles, Réunion annuelle
Mars 2008, Fréjus
Définition de corrélations magnéto-structurales pour l’ion Mn(II) par RPE à haut champ et calculs DFT
C. Duboc, M.-N. Collomb, F. Neese
3 2008 APS March Meeting
10–14 March 2008, New Orleans, Louisiana, USA
Nature of the superconducting state of CeCoIn5 as revealed by NMR
G. Koutroulakis, V. Mitrović, M.-A. Vachon, M. Horvatić, C. Berthier, G. Knebel, G. Lapertot, J. Flouquet
4 2008 APS March Meeting
10–14 March 2008, New Orleans, Louisiana, USA
Spin-Jahn-Teller effect in the antiferromagnetic molecular wheel CsFe8
O. Waldmann, L. Schnelzer, B. Pilawa, M. Horvatić
5 QUEMOLNA Meeting
29 April 2008, Modena, Italy
Concept of Pulsed High Field EPR Spectrometer Operating at 283.2 GHz
P. Neugebauer, A.L. Barra
6 International Workshop on “Quantum Phases and Excitations in Quantum Hall Systems”
Dresden, Germany, 16-21 June, 2008
Landau level spectroscopy of graphene and graphite
http://www.mpipks-dresden.mpg.de/~qhsyst08/
M. Potemski
76

7 Magnetic Resonance Conference EUROMAR-2008
6-11 July 2008, St. Petersburg, Russia
91 Zr NMR AT VERY HIGH FIELD IN ZIRCONIUM HALIDES
O. Pauvert, A. Rakhmatullin, C. Bessada, S. Krämer, M. Horvatić, C. Berthier, F. Fayon, D. Massiot
8 Low Temperature Physics, LT25
6-12 August 2008, Amsterdam, Netherlands
From Luttinger liquids to Bose-Einstein condensation in coupled spin ladders
M. Klanjšek, H. Mayaffre, C. Berthier, M. Horvatić, and T. Giamarchi
9 GDR MICO 3183 (Matériaux et Interactions en Compétition)
1-4 décembre 2008, Autrans, France
New Quantum Magnetic Phases in SrCu2(BO3)2: A Route to Supersolid Phases ?
M. Takigawa, T. Waki, S. Matsubara, M. Horvatić, C. Berthier, S. Krämer, F. Lévy, I. Sheikin, H.
Kageyama, Y. Ueda
10 2008 Symposium, Laboratory for the Applications of Superconductors and Magnetic Materials
30 septembre - 2 octobre 2008, CNRS Grenoble, France
The Grenoble High Magnetic Field Laboratory: actual status of the high magnetic field magnets and
opportunities for characterization of superconductors
E. Mossang
2007
1 2007 APS March Meeting
5–9 March 2007, Denver, Colorado, Etats−Unis
Complex 2D Oxide BaCuSi2O6: A NMR Study,
R. Stern, S. Krämer, M. Horvatić, C. Berthier, I. Heinmaa, E. Joon, T. Kimura, S.E. Sebastian, I.R. Fisher
2 2007 APS March Meeting
5–9 March 2007, Denver, Colorado, Etats−Unis
Nature of a possible FFLO state in CeCoIn5 as revealed by NMR,
G. Koutroulakis, V. Mitrović, M.−A. Vachon, M. Horvatić, C. Berthier, G. Knebel, G. Lapertot, J. Flouquet
3 XXème congrès du GERM
25-30 Mars 2007, Alénya, France
High−field NMR studies of the field induced magnetic phase of BaCuSi2O6,
S. Krämer, C. Berthier, M. Horvatić, R. Stern, T. Kimura, S.E. Sebastian, I.R. Fisher
4 GECOM-CONCOORD
Mai 2007, Plancoët
Etude des propriétés électroniques de complexes mononucléaires de Mn(II) par RPE à haut champ et par
DFT
C. Duboc, F. Neese, M.-N. Collomb
5 Réunion du GDR "NEEM": Nouveaux états électroniques des matériaux
5-8 Juin 2007, Tours, France
La phase x=0 de NaxCoO2
M.-H. Julien, C. de Vaulx, C. Berthier, S. Hébert, V. Pralong
6 « LAW3M » Conference
Août 2007, Rio, Brésil
Symposium sur les champs magnétiques intenses : leur développement en Amérique Latine : High
Magnetic Fields in Grenoble
G. Aubert, F.Debray, J. Dumas, W. Joss, S. Krämer, G. Martinez, E. Mossang, P. Petmezakis, Ph.
77

Sala, J.L. Tholence, C. Trophime and N.Vidal
7 GIRSE-ARPE, First joint meeting
Septembre 2007, Salerne, Italie
Investigation of the electronic properties of mononuclear Mn(II) complexes by high field EPR and DFT
C. Duboc, M.-N. Collomb, F. Neese
8 GIRSE-ARPE first joint meeting’,
Septembre 2007, Salerne, Italie
Origin of the transverse magnetic anisotropy in Mn12 Single Molecule Magnets
A.L. Barra, A. Cornia, D. Gatteschi, L.P. Heiniger, R. Sessoli, L. Sorace
9 2 nd Beijing-Grenoble Meeting on Condensed Matter Physics
Pékin, Novembre 2007
High-Field EPR for the study of Single-Molecule Magnets
A.L. Barra
10 Réunion du GDR Magnétisme et Commutation Moléculaires
Gif-sur-Yvette, Dec. 2007
Origine de l’anisotropie transverse dans les ‘Aimants à 1 molécule’ de la famille Mn12
A.L. Barra, A. Cornia, D. Gatteschi, R. Sessoli, L. Sorace
11 Réunion du GDR Magnétisme et Commutation Moléculaires
Gif-sur-Yvette, Dec. 2007
Magnetostructural Correlations in Tetrairon(iii) Single-Molecule Magnets.
L. Gregoli, C. Danieli, A.L. Barra, P. Neugebauer, G. Pellegrino, G. Poneti, R. Sessoli, and A. Cornia
12 Ampère Meeting
10-11 juillet 2007, CNRS Paris, France, Introduction to the Grenoble High Magnetic Field facility
E. Mossang
2006
1 2006 APS March Meeting
13-17 March 2006; Baltimore, MD, USA
NMR Study of the Possible FFLO State in CeCoIn5
V. F. Mitrović, M. Horvatić, C. Berthier, G. Knebel, G. Lapertot, J. Flouquet
2 Réunion du Groupe Français d'Etude des Composés d'Insertion GFECI 2006
28-30 mars 2006, Autrans, France
Etudes RMN du magnétisme dans NaxCoO2
M.-H. Julien, C. de Vaulx, H. Mayaffre, M. Horvatić, C. Berthier, P. Lejay, C.T Lin
3 QuEMolNa meeting
April 2006, Valencia
Magnetic characterization of SMM
A.L. Barra
4 Low Energy Electrodynamics in Solids (LEES 06)
2-6 July 2006, Tallinn, Estonia
NMR Study of the frustration induced 1/3 magnetization plateau of Azurite (Cu3(CO3)2(OH)2)
S. Krämer, M. Horvatić, C. Berthier, A. Comment, H. Kikuchi
78

5 Low Energy Electrodynamics in Solids (LEES 06)
2-6 July 2006, Tallinn, Estonia
Complex quantum magnet BaCuSi2O6: A NMR Study
R. Stern, I. Heinmaa, E. Joon, S. Krämer, M. Horvatić, C. Berthier, M. Jaime, T. Kimura, S.E. Sebastian,
I.R. Fisher
6 First International workshop on the physical properties of lamellar cobaltates
16-20 July 2006, Orsay, France
x=0 and x=1phases of NaxCoO2 studied by NMR
M.-H. Julien, C. de Vaulx, M. Horvatić, C. Berthier, C.T. Lin, P. Lejay, V. Simonet, V. Pralong, S. Hébert
7 Yamada Conference LX on Research in High Magnetic Fields RHMF 2006
16-19 August 2006, Sendai, Japan
High Field NMR Microscopic Investigation of the Field Induced BEC in the Han Purple BaCuSi2O6
S. Krämer, M. Horvatić, C. Berthier, R. Stern, H. Kikuchi
8 Yamada Conference LX on Research in High Magnetic Fields RHMF 2006
16-19 August 2006, Sendai, Japan
Field-induced spin rotation transition gives rise to re-entrant superconductivity in ferromagnetic
URhGe
I. Sheikin, A.D. Huxley, F. Levy
9 International Conference on Magnetism (ICM 2006)
20-25 August 2006, Kyoto, Japan
Anomalous Field Induced Staggered Magnetization in the Quantum Antiferromagnet Compound Cu(Hp)Cl
C. Berthier, M. Clémancey, H. Mayaffre, M. Horvatić, B. Chiari, O. Piovesana
10 International Conference on Magnetism (ICM 2006)
20-25 August 2006, Kyoto, Japan
Complex 2D Oxide BaCuSi2O6: a NMR Study
R. Stern, S. Krämer, M. Horvatić, C. Berthier, I. Heinmaa, T. Kimura, S.E. Sebastian, I.R. Fisher
11 International Conference on Magnetism (ICM 2006)
20-25 August 2006, Kyoto, Japan
NMR Studies Towards the Magnetic Structure of the 1/3 Magnetization Plateau Phase in the Frustrated
Diamond-Chain Compound Cu3(CO3)2(OH)2
S. Krämer, M. Horvatić, C. Berthier, A. Comment, H. Kikuchi
12 International Conference on Magnetism (ICM 2006)
20-25 August 2006, Kyoto, Japan
High-field de Haas-van Alphen effect study of CeCoIn5 and CeIrIn5
I. Sheikin, D. Aoki, J. Flouquet
13 2006 Symposium, Laboratory for the Applications of Superconductors and Magnetic Materials
11-13 October 2006, Northwest Institute for Nonferrous Metal Research, Xi’an, P.R. China
Introduction to the GHMFL and high field measurement techniques
E. Mossang
14 2 nd International Workshop on Materials Analysis and Processing in Magnetic Fields
19-22 March 2006, CNRS Grenoble, France
The GHMFL and its instrumentation for high field experiments
E. Mossang
15 Synchrotron Applications of High Magnetic Fields
16-17 November 2006, Grenoble-France
Radially cooled high field magnet for neutron scattering
F. Debray, M. Enderle, S. Labbé-Lavigne
79

2005
1 APS March Meeting 2005
21–25/3/2005, Los Angeles, California, USA
NMR studies of quantum spin liquids using high magnetic fields: SrCu2(BO3)2 and BaCuSi2O6
Stern, R.; Heinmaa, I.; Kuhns, P.; Reyes, A.P.; Moulton, W.G.; Horvatić, M.; Berthier, C.; Batista, C.;
Jaime, M.; Kimura, T.; Dabkowska, H. and Gaulin, B.D.
2 Réunion du GDR 2757 "Nouveaux états électroniques des matériaux" (NEEM)
10–13/05/2005, Batz sur Mer, France
Etude par RMN du composé Na1CoO2
C. de Vaulx, M.-H. Julien, C. Berthier, M. Horvatić, V. Simonet, P. Bordet, C.T. Lin
3 QUEMOLNA meeting
12–14 May 2005, Paris, France
Electron Paramagnetic Resonance (EPR) in High Frequency and at High Frequency
P. Neugebauer, A.L. Barra
4 Electron Paramagnetic Resonance at High Field and High Frequency: Technology and Applications
Budapest, Mai 2005
Magnetic and HF-EPR study of an antiferromagnetically coupled Cr8Ni ring :
[(C6H11)2NH2][Cr8NiF9(O2CCMe3)18]
A.L. Barra
5 Journée thématique de l'IMBG : Le Ni et le Mn, deux métaux importants pour le monde vivant
Novembre 2005, Grenoble
Investigation of mononuclear Mn(II) sites by high field EPR
C. Duboc, A. L. Barra
6 2 ème réunion annuelle de l’ARPE
Décembre 2005, Autrans
Etude des propriétés électroniques de complexes polyoxométallates de Cu(II) et de Mn(II) par RPE
multifréquence (34-285 GHz)
C. Duboc, P. Mialane, C. Pichon, E. Rivière, A. Dolbecq, G. Blain, J. Marrot, F. Sécheresse
7 International Symposium on Magneto-Science (ISMS 2005) International Symposium on Magneto-
Science (ISMS 2005)
14-17 November 2005 Yokohama, Japan
Comparison of magnetic forces acting on electrochemical systems
J.P. Chopart, L. Rabah, J. Douglade, J. Amblard, F. Debray, A. Harrach
80

2009
AFF
1 XXI Congrès du GERM
8-13 mars 2009, Fréjus, France
Towards General Purpose NMR in Ultra High Magnetic Fields up to 34 T
S. Krämer, M. Horvatić, C. Berthier, M. Klanjšek, F. Aimo, P.-H. Fries, O. Pauvert, A. Rakhmatullin, C.
Bessada and D. Massiot
2 ARPE meeting
15-18 mars 2009, Autrans, France
Concept of Pulsed High Field / Frequency Electron Paramagnetic ResonanceSpectrometer Operating at
283.2 GHz
P. Neugebauer, A.L. Barra
3 Joint European Japanese Conference: Frustration in Condensed Matter
12-15 May 2009, Lyon, France
Spin Configuration in the 1/3 Magnetization Pateau of Azuriet Determined by NMR
F. Aimo, S. Krämer, M. Klanjšek, M. Horvatić, C. Berthier, and H. Kikuchi
4 GECOM-CONCOORD
Juin 2009, Strasbourg-Albé
Etudes des propriétés électroniques de complexes de Mn par RPE multifréquence et chimie quantique
C. Duboc, M.-N. Collomb, F. Neese
5 The 9th International Conference on Research in High Magnetic Fields (RHMF 2009)
22-25 July 2009, Dresden, Germany
Magnetic Field control of the Luttinger liquid physics in the weakly coupled spin ladder system
CuBr4(C5H12N)2
M. Klanjšek, H. Mayaffre, C. Berthier, M. Horvatić, and T. Giamarchi
6 The International Conference on Quantum Criticality and Novel Phases (QCNP09)
2-5 August 2009, Dresden, Germany
Quantum criticality in spin ladders: from Luttinger liquid physics to Bose-Einstein condensation
M. Klanjšek, H. Mayaffre, C. Berthier, M. Horvatić, and T. Giamarchi
2008
1 ESF workshop on Materials for Frustrated Magnetism
3-5 March 2008, Grenoble, France
1 H and 63,65 Cu high field NMR studies towards the microscopic structure of the frustration driven 1/3
magnetization plateau of Azurite Cu3(CO3)2(OH)2
S. Krämer, M. Horvatić, M. Klanjšek, F. Aimo, C. Berthier, A. Comment, H. Kikuchi
2 Molmat 2008
Toulouse, Juillet 2008
Slow relaxation in a tetrairon(III) Single-Molecule Magnet
A. Cornia, L. Gregoli, C. Danieli, A. Caneschi, R. Sessoli, L. Sorace, A.L. Barra, W. Wernsdorfer
81

3 Magnetic Resonance Conference EUROMAR-2008
6-11 July 2008, St. Petersburg, Russia
Hghi Resolution Solid State NMR in Resistive Magnets at Grenoble High Magnetic Field Laboratory
S. Krämer, M. Horvatić, C. Berthier, F. Debray, C. Trophime, N. Vidal, P. Petmezakis, A. Richard, P. Sala
4 18th International Conference on High Magnetic Fields in Semiconductor Physics and
Nanotechnology,
Sao Pedro, BRAZIL, AUG 03-08, 2008
Magnetoresistance Oscillations In Double Quantum Wells under Microwave Irradiation
Wiedmann, S. and Gusev, G. M. and Raichev, O. E. and Lamas, T. E. and Bakarov, A. K. and Portal, J.-C.
5 4th EPR Summer School
22 aug.-1 sept. 2008, St. Andrews, UK
Concept of Pulsed High Field EPR Spectrometer Operating at 283.2 GHz
P. Neugebauer, A.L.. Barra
6 JMC11, 11ème journées de la Matière Condensée
25-29 août 2008, Strasbourg, France
New quantum Magnetic Phases in SrCu2(BO3)2: a route to supersolids?
M. Takigawa, T. Waki, S Matsubara, M. Horvatić, C. Berthier, S. Krämer, F. Levy, I. Sheikin, H.
Kageyama and Y. Ueda
7 ICMM 2008
Florence, Septembre 2008
HF-EPR study of Cu and Ni cubanes
C. Aronica, Y. Chumakov, E. Jeanneau, D. Luneau, P. Neugebauer, A.L. Barra, B. Gillon, A. Goujon, B.
Cousson, W. Wernsdorfer
8 International COST meeting on Advanced Paramagnetic Methods in Molecular Biophysics
Siena, Septembre 2008
HF-EPR study of a mononuclear Mn(III) model complex
Q. Scheifele, F. Juranyi, A. Podlesniak, P. Tregenna-Piggott, A.L. Barra, H. Weihe
9 Highly Frustrated Magnetism 2008
7-12 September 2008, Braunschweig, Germany
NMR investigation of Azurite, the frustrated diamond spin chain
S. Krämer, M. Klanjšek, F. Aimo, M. Horvatić, C. Berthier, H. Kikuchi
10 GDR MICO 3183 (Matériaux et Interactions en Compétition)
1-4 décembre 2008, Autrans, France
High-field NMR studies of the modulated BEC in BaCuSi2O6
11 GDR MICO 3183 (Matériaux et Interactions en Compétition)
NMR investigation of Azurite, a frustrated diamond spin chain
S. Krämer, M. Horvatić, C. Berthier, R. Stern, T. Kimura and I. Fisher
12 GDR MICO 3183 (Matériaux et Interactions en Compétition)
F. Aimo, S. Krämer, M. Klanjšek, M. Horvatić, C. Berthier, H. Kikuchi
Controlling Luttinger Liquid Physics in Spin Ladders under a Magnetic Field
M. Klanjšek, H. Mayaffre, C. Berthier, M. Horvatić, B. Chiari, O. Piovesana, P. Bouillot, C. Kollath, E.
Orignac, R. Citro and T. Giamarchi
82

2007
1 Conférence ‘ESR-2007
Oxford, Mars 2007
EPR of the Single Molecule Magnet Mn12tBuAc : origin of transverse magnetic anisotropy
A.L. Barra, A. Janoschka, V. Schünemann, C. Schmidt
2 ARPE meeting
20 March 2007, Paris, France
Electron Paramagnetic Resonance at 283.2 GHz
P. Neugebauer, A.L. Barra, J. Florentin
3 XXème congrès du GERM
25-30 Mars 2007, Alénya, France
High resolution solid state NMR in resistive magnets at Grenoble High Magnetic Field Laboratory
(GHMFL),
S. Krämer, C. Berthier, M. Horvatić, C. Chauvin, F. Debray, C. Trophime, N. Vidal, P. Petmezakis, A.
Richard, P. Sala
4 EUROMAR2007
1-6 July 2007, Tarragona, Spain
Fabry-Pérot Resonator for Electron Paramagnetic Resonance (EPR) Experiments
P. Neugebauer, A.L. Barra
5 MT 20 − 20th International Conference on Magnet Technology
27-31August 2007, Philadelphia, Pennsylvania, Etats−Unis
High resolution solid state NMR in resistive magnets at Grenoble High Magnetic Field Laboratory
(GHMFL),
S. Krämer, C. Berthier, M. Horvatić, C. Chauvin, F. Debray, C. Trophime, N. Vidal, P. Petmezakis, A.
Richard, P. Sala
6 GIRSE-ARPE first joint meeting
30 sept-03 oct. 2007, Vietri-sul-Mare, Italy
Fabry-Pérot Resonator for Electron Paramagnetic Resonance (EPR) Experiments,
P. Neugebauer, A.L. Barra
7 GDR MCM (Magnétisme et Commutation Moléculaires)
3-5 December 2007, Gif-sur-Yvette, France
The Pulsed High Field / High Frequency Electron Paramagnetic Resonance Spectrometer Concept,
P. Neugebauer, A.L. Barra
2006
1 2006 APS March Meeting
13-17 March 2006; Baltimore, MD, USA
51 V-NMR investigation of the spin-frustrated magnet Ni3V2O8
W.G. Clark, P. Ranin, Guoqing Wu, G. Gaidos, G. Lawes, A.P. Ramirez, R.J. Cava, M. Horvatić, C.
Berthier
2 EUROMAR 2006
16-21 July 2006; York, UK
High Filed EPR study of powder of a cubane Ni4 compound
P. Neugebauer, C. Aronica, A.L. Barra, D. Luneau
83

3 Yamada Conference LX on Research in High Magnetic Fields RHMF 2006
16-19 August 2006, Sendai, Japan
77 Se NMR studies at a wide magnetic field range on the field induced superconductor, lambda-(BETS)2FeCl4
K. Hiraki, T. Takahashi, H. Mayaffre, M. Horvatić, C. Berthier, T. Takahashi, H. Tanaka, A. Kobayashi, H.
Kobayashi
4 International Conference on Magnetism (ICM 2006)
20-25 August 2006, Kyoto, Japan
77 Se Microscopic Evidence for the Jaccarino-Peter Mechanism in the Organic Charge Transfer Complex
lambda-(BETS)2FeCl4
K. Hiraki, H. Mayaffre, M. Horvatić, C. Berthier, T. Takahashi, H. Tanaka, A. Kobayashi, H. Kobayashi
5 2 ème conférence internationale de l’IMBG
Septembre 2006, Autrans
How high field EPR can be used for the study of mononuclear Mn(II) sites
C. Duboc, I.Michaud Soret, J.Pécaut et M.-N. Collomb
6 Conférence EFEPR
Madrid, Septembre 2006
High-Field EPR of ferrous high-spin iron center of a rubredoxin type electron transfer protein
A.L. Barra, A. Janoschka, V. Schünemann, C. Schmidt
7 5 ème Réunion annuelle du Club Métalloprotéines et modèles
Octobre 2006, Aussois
Etude de la structure électronique de complexes mononucléaires de Mn(II) par RPE à haut champ et à haute
fréquence
C. Duboc, J. Pécaut, T. Phoeung, C. Mantel, M.-N. Collomb
8 4 th International Workshop on Mechanical and Electromagnetic Properties of Composite
Superconductors (MEM 06)
Durham University, UK, 2-5, Juillet 2006
The Grenoble High Magnetic Field Laboratory (GHMFL)
E. Mossang, F. Debray, W. Joss, G. Martinez, P. Petmezakis, P. Sala, J.L. Tholence, C. Trophime
2005
1 Workshop Manipulating Quantum Spins and Classical Dots
Les Houches, Avril 2005
HF-EPR study of the in-plane magnetic anisotropy of Mn12
A.L. Barra
2 4 èmes Journées scientifiques de l’IMBG
Avril 2005, Autrans
Etude des propriétés électroniques de complexes mononucléaires de Mn(II) magnétiquement dilués par RPE
multifréquence (9 - 285 GHz)
C. Duboc, T. Phoeung, J. Pécaut, M.-N. Collomb
3 International Symposium on Molecular Conductors ISMC 2005
17–21/07/2005, Hayama, Japan
π-d interaction in λ(BETS)2FeCl4: 77 Se NMR
K. Hiraki, H. Mayaffre, M. Horvatić, C. Berthier, H. Tanaka, A. Kobayashi, H. Kobayashi and T.
Takahashi
84

4 12 th International Conference on Bioinorganic Chemistry (ICBIC)
Août 2005, Ann Arbor, USA
High Field EPR: A powerful tool for the study of mononuclear Mn(II) sites
C. Duboc, J. Pécaut, T. Phoeung, C. Mantel, M.-N. Collomb
5 Physical Phenomena at High Magnetic Fields-V, (PPHMF-V)
6–9/08/2005, Tallahassee, Florida, USA
Quantum spin liquid BaCuSi2O6 and BEC of triplons: a NMR study
R. Stern, M. Horvatić, S. Krämer, C. Berthier, P. Kuhns, A. Reyes, W. Moulton, I. Heinmaa, E. Joon,
T. Kimura, M. Jaime, C. Batista, S.E. Sebastian, and I.R. Fisher..
6 24th International Conference on Low Temperature Physics (LT24)
10–17/08/2005, Orlando, Florida, USA
Quantum spin liquid BaCuSi2O6 and BEC of triplons: a NMR study
R. Stern, M. Horvatić, I. Heinmaa, C. Berthier, S. Krämer, P. Kuhns, A. Reyes, W. Moulton, C. Batista, M.
Jaime, E. Joon, T. Kimura, S. E. Sebastian, and I.R. Fisher.
7 4 ème Réunion annuelle Club Métalloprotéines et modèles
Septembre 2005, Carry le Rouet
High Field EPR: A powerful tool for the study of mononuclear Mn(II) sites
C. Duboc, J. Pécaut, T. Phoeung, C. Mantel, M.-N. Collomb
8 COST P15 meeting
Budapest, Octobre 2005
High-field EPR of ferrous high-spin iron centers of a rubredoxin type electron transfer protein
A.L. Barra
9 Conférence « La RPE en France : Perspectives et Enjeux Scientifiques »
Autrans, Décembre 2005
Multifrequency EPR study of ferrous iron centers of a rubredoxin type protein
A.L. Barra, A. Janoschka, V. Schünemann, C. Schmidt
10 19 th International Conference on Magnet Technology
Genova, Italy, 18-23 Sep 2005
The Grenoble High Magnetic Field Laboratory
G. Aubert, F. Debray, H. Jongbloets, W. Joss, G. Martinez, E. Mossang, P. Petmezakis, P. Sala, C. Trophime
and P. Wyder
85

OS
2007
1 M. Fontecave, C. Duboc
Metals in biocatalysis: from metalloenzymes to bio-inspired systems
Comptes Rendus de l’Académie des Sciences – Chimie, 2007, vol. 10
2005
1 Barra A.L. and A.K.Hassan
Electron spin resonance
In Encyclopaedia of Condensed Matter Physics, Elsevier Science, Oxford, G.Bassani, G.Liedl,
P.Wyder eds. 5867 (2005)
2 Bassani F., G.L.Liedl and P.Wyder
Encyclopedia of Condensed Matter Physics
Publisher : Elsevier Physics, eds. G.F.Bassani, G.L.Liedl, P.Wyder, 2005
3 de Brion S., M.D.Nunez-Regueiro and G.Chouteau
Orbital and spin order in the triangular S=1/2 layed compound (Li,Na)NiO2
"Frontiers in Magnetic Materials" ed. A.V.Narlikar, Springer 2005, ISBN3-540-24512-X
4 A.L. Barra, A.K. Hassan
Electron Spin Resonance
Encyclopaedia of Condensed Matter Physics, Elsevier Science, Oxford, G. Bassani, G. Liedl, P. Wyder Ed.,
58-67 (2005)
AP
Contribution to the upgrade program of the ESRF in the frame of ESFRI financed by the European Commission
Steady magnetic fields for neutron and X-ray scattering
J.F. Bouteille, C. Bouton, F. Debray, M. Enderle, G. Martinez, G. Rikken and F. Wilhelm.
Variable temperature characterization of NbTi strands for JT-60 SA TF coils : manufacturing process
optimization, ref. AIM/NTT-2008.011
M. Nannini, H. Cloez, S. Girard, C. Roux, J.P. Serries, M. Tena, L. Zani, and E. Mossang,
86

Prix et distinctions
Highlight ANR PNANO 2008 (www.r3n.org) pour ‘’ANR MICONANO - ANR-05-NANO-059
Coordinateur : J.-C. Portal
Sami Sassine, Prix International "AIXTRON Young Scientist Award" 2007
Sami Sassine, Prix de la meilleure thèse INSA 2007 (ED GEET) Thèse effectuée au LCMI
C. Duboc , Médaille de Bronze du CNRS, section 13, 2007
C. Duboc, Prix de la division chimie physique de la SFC, 2007, C. Duboc
Organisation de colloques et de portée nationale/internationale
6 èmes Journées scientifiques de l’ARPE (national)
A.-L. Barra, G. Blondin, C. Duboc, B. Guigliarelli, Mars 2009, Autrans (55 participants)
Ecole thématique du CNRS de RPE : techniques avancées (national)
A.-L. Barra, G. Blondin, C. Duboc, B. Guigliarelli, Juin 2008, Autrans (50 participants)
International workshop on Materials For Frustrated Magnetism (international)
C. Berthier, P. Bordet, A. Harrison, C. Lacroix, P. Lejay, A. Mader, B. Maire-Amiot, L.Tellier ILL, Grenoble,
March 2008 http://mffm.neel.cnrs.fr (_80 participants)
European School : Magnetic Field for Science (international, in the framework of EuromagnetI)
M. Potemski, C. Faugeras, D.K Maude, M. Sadowski, G. Ménéroud, R. Graziotti; A. Pic
Cargese, 27/08-08/09 2007 (90 participants)
2 ème conférence internationale de l’IMBG (international)
C. Duboc (porteur du projet), M. Atta, C. Belle, F. Catty, M.-N. Collomb, M. Fontecave, S. Ménage, F. Thomas,
Septembre 2006, Autrans (100 participants)
Ecole thématique du CNRS de formation à la RPE (national)
A.-L. Barra, G. Blondin, C. Duboc, Y.-M. Frapart, S. Gambarelli, D. Gourier, B. Guigliarelli, O. Guillot-Noël, S.
Marque, H. Vezin, Mai 2006, Carry-Le-Rouet (80 participants)
2 ème réunion scientifique de l’ARPE (national)
A.-L. Barra, C. Duboc, S. Gambarelli, Décembre 2005, Autrans (50 participants)
Journée thématique de l’Institut des Métaux en Biologie de Grenoble (IMBG) sur "Le nickel et le manganèse : deux
métaux importants dans la chaîne de la vie" (national)
C. Belle, M.-N. Collomb, C. Duboc, F. Thomas Novembre 2005, Grenoble (50 participants)
Colloqium “Science in High Magnetic Field (international)
G. Chouteau, Grenoble Juin 2005 (60 participants)
4 èmes journées scientifiques de l’IMBG (national)
C. Belle, C. Duboc, J.-M. Mouesca, Mars 2005, Autrans (60 participants)
87

ADMINISTRATION
A. Pic
Assistante
Gestion
financière
R. Graziotti
Accueil
utilisateurs
Secrétariat
E. Rochat
Administrat.
Gestion d’unité
XXX
Secrétaire
Demande 2009
T
Secrétariat
RECHERCHE
Conducteurs de
basse
dimensionalité
D.K. Maude
Métaux et
supraconductivité
I. Sheikin
W. Joss 10 %
A. De Muer
RMN
C. Berthier
M. Horvatic 95 %
S. Krämer
RPE
A.L. Barra
C. Duboc 30 %
N. Bréfuel
Spectroscopie des
semiconducteurs
M. Potemski
C. Faugeras
G. Martinez
Semiconducteurs
Transport
J. C. Portal
Technologie des
supraconducteurs
E. Mossang 30 %
INSTRUMENTATION
SCIENTIFIQUE COORDINATION
UTILISATEURS
D. Maude + E. Mossang (70 %)
Coordination
utilisateurs
C. Warth-Martin
Gestion et
organisation
des expériences
sur aimants 40%
Instrumentation
scientifique
G. Arnaud
Basses
températures
I. Breslavetz
Optique
J. Florentin
Mécanique pour
instrumentation
J.P. Domps
Instrumentation
Mesures physiques
R. Pankow
Mécanique et
Cryogénie
L. Ronayette
Cryogénie 10%
C. Warth-Martin
Etudes - Cryogénie
50 %
DIRECTION
J.L. Tholence
COMMUNICATION
M. Horvatic 5 %
R. Barbier 5 %
Electrotechnique
XXX
Basse tension
M. Nescroix
Moyenne tension
Magnétohydrodynamique
F. Debray 10% Demande 2009
AI
Electrotechnique
Electronique
J. L. De Marinis
Etudes -
Développement
E. Yildiz
Etudes -
Développement
T. Beauvillier
Réalisation
tests
Laboratoire des Champs Magnétiques Intenses - Décembre 2008
HYGIENE ET SECURITE
L. Ronayette 10%
C. Warth-Martin 10 %
ELECTRONIQUE
ELECTROTECHNIQUE
AUTOMATISME
P. Petmezakis
Automatisme
R. Barbier
Automates
industriels 95 %
P. Sala
Etalonnage
Mesures aimants
C.Grandclement
Bâtiments
J. Hernandez
Sous-traitance
Maintenance
L. Mangano
Maintenance
HYBRIDE
P. Pugnat
L. Ronayette
80 %
INSTALLATIONS
W. Joss 90 %
Etudes et
modélisation
C. Trophime
Modélisation 80%
J. Dumas
Aimants et
instrumentation
N. Vidal
Aimants et
instrumentation
Hydraulique
J. Matera
Maintenance
hydraulique
F. Di Chiaro
Maintenance
hydraulique
50 %
AIMANTS RESISTIFS
ATELIER MECANIQUE
F. Debray 90 %
Aimants résistifs
C. Auternaud
Montage aimants
F. Di Chiaro
Montage aimants
50 %
M. Kamke
Montage hélices
Contrôle
R. Pfister
Montage hélices
Collage
T. Disparti
Montage bitter
Suivi parc aimants
E. Verney
Montage Bitter
Suivi parc aimants
XXX
Ingénieur
Mécanique
Demande 2009
IR
Mécanique
Atelier
mécanique
C. Mollard
Responsable de
l’atelier
XXX
Montage CN
5 axes
Soudure
D. Ponton
CN - 5 axes
J. Spitznagel
Montage CN
5 axes
Soudure
Demande 2009
T
Mécanique
INFORMATIQUE
C. Trophime - 20 %
S. Buisson
Maintenance
et réseaux
T. Dolmazon
Maintenance
et réseaux

Annexe 1
Enseignement et formation par la recherche,
Information et culture scientifique et technique
Formations dispensées par les personnels du LCMI/LNCMI-G de 2005 à 2009
Formation
Enseignement Sciences Physiques
Travaux dirigés
atelier électronique
Intervenant
De Muer
(maître de
conférences)
Petmezakis
Yildiz
Encadrement projet De Marinis
Travaux pratiques
Chimie organique
Communication et valorisation du
laboratoire
Encadrement de stagiaires
Brefuel
Debray
De Muer
Faugeras
Guillot
Krämer
Mossang
Petmezakis
Rikken
Tholence
91
Stagiaires
Etudiants
IUT 1
UJF
Etudiants
Polytech Grenoble
UJF
Etudiants
PHELMA
INPG
Etudiants
en licence
UJF
Grand Public (Fête de la
Science),
Scolaires,
Universitaires
Durée
250 h / an
130 h / an
90 h / an
36 h / an
32 h / an
(équ. TP)
équ.
10 jours / an
2004-2005 2005-2006 2006-2007 2007-2008
BTS DUT 2 1 2 3
Licence 4 1
Master 7 4 6 6

Annexe 2
Action de formation permanente des personnels de l’unité
Partie commune LCMI-LNCMP
Les activités du LNCMI, issu de la fusion du LNCMP de Toulouse et du LCMI de Grenoble, sont très
étendues. Les disciplines techniques incluent la conception et fabrication mécanique, la métallurgie,
l’électrotechnique haute tension, la cryogénie et l’instrumentation. Au niveau scientifique, plusieurs
domaines de la physique, dont le magnétisme, la supraconductivité, les semi-conducteurs et la nanophysique
sont couverts par le LNCMI, utilisant des techniques de transport, d’optique etc... Etant
donné le rôle international que joue le LNCMI, les agents se doivent d’entretenir et de développer
leurs compétences et performances techniques et/ou scientifiques au meilleur niveau mondial.
Les formations suivies, pendant la période 2005-2009, par les personnels du LNCMP-Toulouse étaient
en partie issues d’offres de formation transversales en provenance des 3 tutelles. L’accent a été mis sur
le suivi de cours d’anglais pour les personnels ITA amenés à interagir avec les visiteurs étrangers et
sur l’initiation des chercheurs à l’utilisation des machines-outils (dans le cadre des PFU
2005/2006/2009, 3 sessions de formation ont été mises en oeuvre dans nos locaux). Des formations
techniques dans des domaines spécifiques permettant l’acquisition de connaissances et de compétences
nouvelles dans le but d’accompagner de façon optimale les activités de recherche ont été mises en
œuvre soit de façon individuelle (conception et caractérisation de circuit hyperfréquences, techniques
de microbiologie, langage de programmation, logiciel de CAO/DAO…), soit de façon collective
(stage d’électronique radiofréquence, stage de prise en main pour la fraiseuse à commande numérique
suivi d’une formation au logiciel de programmation ESPRIT, stage d’instrumentation LABVIEW).
L’accompagnement des nouveaux entrants s’effectue par des formations spécifiques à leur activité
dans le laboratoire (XLab et Labintel pour le secrétariat et formation Web pour le gestionnaire
réseaux). Des formations à l’encadrement ont aussi été mises en œuvre (management, conduite de
projets…). De plus, des formations pour améliorer la sécurité au laboratoire ont été suivies par un
grand nombre des membres du LNCMP (SST, conduite des ponts roulants, manipulation des
extincteurs). D’autre part, plusieurs membres du laboratoire appartiennent aux réseaux de métiers
(mécaniciens, électroniciens, opticiens, informaticiens) animés par le CNRS.
Pendant la période 2005 – 2009, les personnels du LCMI Grenoble ont suivi 134 formations. Etant
donné que le LCMI est un grand instrument avec des grosses installations techniques une grande partie
des formations sont effectuées dans les domaines « techniques spécifiques » et
« informatique (applications) ».
De nouvelles compétences étaient notamment acquises par les personnels pour permettre le
développement de nouvelles technologies dans le domaine de la conception des aimants résistif
(conducteurs, éléments finis, CATIA), ainsi que dans le domaine de pilotage et supervision (Starter
TiA, conception avec UML) en vu de modifications majeures sur les installations de puissance de
24 MW.
D’autres formations dans les domaines cryogénie, optique, Labview, instrumentation et électronique
ont été effectuées pour améliorer l’accompagnement technique des visiteurs scientifiques et les
activités de recherche dans le laboratoire.
Une attention particulière a notamment été portée à la formation des agents de l’équipe informatique
compte tenu de l’évolution rapide des techniques réseaux.
La mise en place d’un centre d'usinage 4 axes ½ utilisé également pour la fabrication d’aimants a
nécessité le développement de compétences de programmation des agents de l’atelier mécanique. Un
autre agent a suivi une formation d’usinage mécanique dans le but d’améliorer le service auprès des
chercheurs travaillant sur les aimants résistifs.
L’adaptation au poste de travail des nouveaux entrants a pu être facilitée par des formations
notamment dans les domaines de la gestion de la recherche et la bureautique (XLAB, SIFAC,
ACCESS, EXCEL, WORD).
93

Le laboratoire accueille chaque année un grand nombre de visiteurs étrangers pour des périodes de
courtes ou moyennes durées. En effet, la maîtrise de la langue anglaise à l’oral et à l’écrit des
personnels de toutes les catégories est d’une grande importance. D’autre part, un certain nombre de
thésards et post-doc étrangers ont suivi une formation de la langue française.
Plusieurs formations ont également été réalisées avec le but d’améliorer l’efficacité personnelle ainsi
que le management et le travail en équipe (techniques de la communication, animer un groupe de
travail, réaliser un entretien de carrière et rédiger un rapport d’activité, gestion du temps etc.).
La forte proportion des formations dans le domaine de l’hygiène et la sécurité est en rapport avec la
présence d’installations de puissance mais aussi liée aux activités dans les domaines de la cryogénie et
chimie ainsi qu’aux travaux de manutention.
De plus, un certain nombre d’agents participe aux réseaux de métiers CNRS (mécaniciens,
informaticiens, opticiens et électroniciens).
Depuis le 2 février 2009, date de création du LNCMI (UPR3228) issue de la fusion du LNCMP de
Toulouse et du LCMI de Grenoble, les 2 sites, toulousain et grenoblois, du LNCMI se concertent afin
de mettre en place des synergies communes de formation pour les années à venir.
94

Annexe 3
Hygiène et sécurité
Laboratoire Champs Magnétiques Intenses, Grenoble
1. Bilan des accidents et incidents survenus dans l’unité :
date nature de l’accident mesures prises
Brûlure cryogénique de la main à l’hélium liquide Visite à l’infirmerie du CNRS
2005
Contact à mains nues avec un élément portant des
traces d’acide fluorhydrique
Utilisation d’une ampoule de gluconate de
calcium, rappel d’utilisation des EPI
Lombalgie Arrêt de travail pendant 6 semaines
2006 Accident de trajet en vélo Soins internes
Accident de trajet : chute en vélo sur sol glissant
(entorse à la main)
Soins internes
Accident de trajet : l’agent, en vélo, a été percuté Visite à l’infirmerie du CNRS et médecin
par un scooter sur la piste cyclable
du travail
2007
Chute dans l’escalier (entorse au pied)
Soins internes, rappel aux agents de tenir
la rampe
Chute d’une plateforme élévatrice lors d’un
contrôle visuel après l’installation (fracture du
bras)
Appel des secours (pompiers) et transport
à l’hôpital
Accident de trajet : chute sur piste cyclable (plaie Visite à l’infirmerie du CNRS, puis le
à la tête)
médecin traitant
2008
Accident de trajet : agent piéton renversé par un
cycliste (fracture du coude, contusions)
Chute dans l’escalier (contusion au bras)
Consultation du médecin du travail, puis
médecin traitant, arrêt de travail pendant 2
mois
Consultation du médecin du travail
Choc au tibia lors de la manutention d’une pièce
métallique (déchirures musculaires)
Soins internes
Malaise (vertiges soudains) d’un agent au travail
Appel des secours (pompiers), transport et
examen ORL à l’hôpital
2. Identification et analyse des risques spécifiques rencontrés dans l’unité :
L’évaluation des risques lors de la mise en place du Document Unique a montré que les principaux
risques identifiés au LNCMI-G sont le risque électrique et magnétique, le risque d’incendie, le risque
cryogénique, le risque chimique et le risque lié à la manutention.
3. Dispositions mises en œuvre en fonction des risques et priorités retenues :
Risque électrique : les zones des installations de puissance sont sécurisées (enclos grillagé englobant
toute l’installation à l’intérieur duquel l’accès est interdit aux personnes non habilitées) et une
procédure de consignation des installations est systématiquement appliquée pour toutes les
interventions.
Chaque salle d'expériences est équipée d'un arrêt d'urgence général qui se trouve à l'extérieur de la
salle concernée.
Risque magnétique : les zones à risque sont indiquées par des panneaux lumineux qui montrent si un
aimant est en marche ou par des autocollants « attention champ magnétique » et « interdit aux porteurs
de stimulateurs cardiaque » à l’extérieur des salles ainsi qu’aux entrées des différents bâtiments
qu’occupe le laboratoire.
95

Risque d’incendie : Une installation de détection incendie couvre la quasi totalité des locaux du
laboratoire. L’installation fait l’objet d’un contrat de maintenance avec une vérification annuelle.
Risque cryogénique : Les sous-sols, qui présentent un risque d'anoxie et d'asphyxie liés aux gaz
cryogéniques fréquemment utilisés au laboratoire, sont équipés de capteurs d'oxygène reliés à une
centrale de détection. Un taux d’oxygène passant sous le seuil de 19% déclenche une alarme sonore et
le fonctionnement de panneaux lumineux clignotants. Cette installation fait l'objet d'un contrat de
maintenance avec une vérification trimestrielle.
Risque chimique : La venue d’un ingénieur chimiste a permis de réorganiser le laboratoire de chimie
et d’actualiser l’inventaire des produits chimiques utilisés. Les produits non utilisés ou périmés ont été
éliminés. Un stockage extérieur des solvants a été mis en place avec l’accord de l’IRPS. Par ailleurs,
une liste des produits chimiques présents au laboratoire de chimie est accessible sur l’intranet.
De nouvelles sorbonnes ont été installées dans la salle de chimie remplaçant les existantes.
Risque lié à la manutention : Les appareils de levage et de manutention (17 palans, 8 ponts-roulants, 4
chariots élévateurs) font l’objet de vérifications périodiques. En 2007, ces appareils ont également été
vérifiés à charge nominale ou jusqu’à 5 tonnes. Par ailleurs, tous les équipements de manutention
(sangles, chaines, crochets, manilles …) ont été contrôlés par l’APAVE en 2006.
4. Fonctionnement des structures d’hygiène et de sécurité propres à l’unité :
Le laboratoire compte 2 ACMO en raison de la forte potentialité de danger due à la complexité des
installations. 10% de leurs temps de travail est consacré à la réalisation de leurs missions.
La commission hygiène et sécurité (CHS) se réunit une fois par an. Elle est présidée par le directeur de
l'unité et se compose de l'Ingénieur Régional de Prévention et de Sécurité (IRPS), du médecin du
travail, de l'infirmière, de l'assistante sociale, des 2 ACMO et de 5 membres nommés par le directeur
parmi le personnel scientifique et technique du laboratoire qui représentent les différents services du
laboratoire : 1 chercheur, 1 ingénieur de recherche en charge des utilisateurs des sites d'aimants, 1
technicien en charge des installations hydrauliques et 2 membres de l'équipe responsable des travaux
des bâtiments.
Un registre d’hygiène et de sécurité ainsi qu’un registre de sécurité et des contrôles obligatoires est à la
disposition des agents dans le bureau des ACMO.
5. Dispositions mises en œuvre pour la formation des personnels et des nouveaux entrants :
Les formations du personnel dans le domaine de la sécurité ont toujours été très encouragées
par la direction du laboratoire. Elles sont également inscrites dans le Plan de Formation de l’Unité qui
est établi chaque année.
L’accent est mis sur les formations suivantes : habilitations électrique, cariste, pontierélingueur,
secourisme. Les nouveaux entrants sont encouragés à suivre les formations initiales tandis
que les agents déjà formés participent aux recyclages périodiques. Un certain nombre d’agents ont
également réalisé des formations concernant le risque laser et l’utilisation des extincteurs.
En 2008, une sensibilisation au risque chimique rencontrés dans les ateliers
mécaniques (bains d’acides, utilisation de solvants et colles) a été spécialement effectué par l’IRPS
pour les techniciens du laboratoire, utilisateurs occasionnels de produits chimiques qui n’ont aucune
formation dans le domaine de la chimie.
Une brochure d’information présentant un résumé de tous les risques présents au laboratoire
est systématiquement distribuée aux nouveaux entrants et utilisateurs des sites d'aimants.
Les comptes-rendus des CHS, la brochure d’information sur les risques, des consignes
concernant l’élimination des huiles usées ainsi que les listes des secouristes et caristes sont disponibles
en permanence sur l’intranet du laboratoire dans la rubrique Hygiène et Sécurité.
6. Problèmes de sécurité qui subsistent :
Risque d'incendie : Suite à l’installation des alarmes sonores, il reste à planifier une organisation
humaine et matérielle des secours (désignation de serre-fils, guides d’évacuation, définition de points
96

de regroupement, etc…). Ceci doit se faire avec l’IRPS dans le cadre plus global de l’ensemble du site
du polygone CNRS.
Signalisation : La signalisation des personnes à appeler (responsable de la salle) en cas d’un problème
matériel majeur dans une salle d’expérience doit être mise à jour.
Risque électrique : Il est nécessaire de refaire un diagnostic de l’équipement électrique du laboratoire
par un organisme agrée. Les installations électriques en amont des disjoncteurs de chaque salle ont
déjà été vérifiées.
Nouveaux entrants : Un certain nombre de thésards et post-doc ne maîtrisent pas suffisamment la
langue française à leur arrivée au laboratoire. Les formations dans le domaine de la sécurité doivent
notamment être suivies au début de la prise des fonctions, il est donc urgent de trouver du matériel de
formation en langue anglaise.
97

Laboratoire National des Champs Magnétiques Intenses
Grenoble – Toulouse
Sous la tutelle du Le LNCMI est une unité propre (UPR 3228)
du CNRS conventionnée avec :
- INSA Toulouse
- Université Paul Sabatier Toulouse
- Université Joseph Fourier Grenoble
PROJET SCIENTIFIQUE
2011-2014
Laboratoire National des Champs Magnétiques Intenses
LNCMI – UPR 3228
Etablissement de rattachement : CNRS – Institut National de Physique
Lié par convention avec
l’Université Joseph Fourier Grenoble 1
l’Université Paul Sabatier Toulouse 3
l’INSA de Toulouse
AERES
Campagne d’évaluation 2011-2014
LNCMI / CNRS
25 rue des Martyrs - B.P. 166 143 avenue de Rangueil
38042 GRENOBLE CEDEX 9 – France 31400 TOULOUSE - France
Tél. : +33 (0)4 76 88 10 48 Tél. : +33 (0)5 62 17 28 60
Fax : +33 (0)4 76 88 10 01 Fax : +33 (0)5 62 17 28 16
http://lncmi.cnrs.fr/

Table of contents
General overview 3
Technical perspectives 5
Scientific perspectives 15
Auto analysis 25
2

General overview
Introduction
The Laboratoire National des Champs Magnétiques Intenses (LNCMI) was created on 1/1/2009
through the merger of the Laboratoire des Champs Magnétiques Intenses (LCMI UPR5021 in
Grenoble) and the Laboratoire National des Champs Magnétiques Pulsés (LNCMP UMR5147,
Toulouse), as part of the Très Grands Instruments de la Recherche (TGIR) of the CNRS. Like its two
predecessors, it has three main missions:
- to generate the highest possible magnetic fields for research purposes
- to use these fields for in-house research and to develop the necessary scientific infrastructure
- to provide access to qualified French and European users to these high magnetic fields and the
surrounding scientific infrastructure.
The rationale behind the merger was the potential synergy between the two laboratories in terms of
scientific programs and instrumentation and the increased weight and impact of a unified position in
the negotiations with partners and funding agencies. The first implementations of the synergy and the
consequences of the increased weight of the laboratory are becoming visible. For the coming years, the
LNCMI will further expand upon this synergy.
Context
The generation of very high magnetic fields is a technological challenge, the maximum fields being
limited by Joule heating and Lorentz forces. High field magnets operate very close to the engineering
limits of these parameters. Further progress in this domain requires significant efforts in materials
research, non-linear multi-physics finite element analysis and mechanical fabrication techniques,
implying ever increasing design and manufacturing costs. Also the exploitation requires a high
financial commitment, because of electrical power consumption for DC magnets and cooling by
cryogenic liquids for pulsed magnets. Therefore not many infrastructures exist where very high
magnetic fields can be generated and used for research. Over the last twenty years, financial
limitations and the complexity of such installations have resulted in a continuous concentration of
these activities in less but larger infrastructures, very often operated on a national scale. For generating
continuous magnetic fields in excess of 30 T, powered with 15+ MW power supplies, installations can
be found in the USA (Tallahassee), Japan (Tsukuba) and Europe (Grenoble and Nijmegen). Large
pulsed field installations based either on motor generators or large (> 5 MJ) capacitor banks are found
in Los Alamos (USA), Tokyo (Japan), and in Europe in Toulouse and in Dresden (created in 2006). As
the most recent step in this trend, the Chinese government has recently funded a static field installation
in Heifei and a pulsed field installation in Wuhan, which are currently under construction and which
will become operational by 2010. Still the clearest example of this trend is the creation of the National
High Magnetic Field Laboratory (NHMFL) in the USA, a three site organization that pioneers all
aspects of high magnetic field generation, and its use for scientific experiments.
In Europe, for historical and political reasons, the high magnetic field landscape was much more finely
distributed and therefore less effective and visible; The Netherlands have had separate DC and pulsed
field laboratories, which were integrated into the new Nijmegen installation in 2003. The UK also has
had DC (Oxford) and pulsed (Oxford and Bristol) installations, which are being shut down for lack of
critical mass. Germany has withdrawn from the joint French-German DC installation in Grenoble, and
has created a new pulsed field facility in Dresden (2006).
France has had separate DC and pulsed field infrastructures (LCMI and LNCMP respectively) until
1/1/2009. Although performing quite well as compared to their counterparts abroad in terms of
publications and technical performance, the lack of recent major investments in their installations
caused their long term competitiveness to decrease. A first major step towards improving France’s
position in high magnetic field science was the merger of the LCMI and LNCMP into the LNCMI, per
1/1/2009. For the future, several large projects are being developed that will restore the leading role
France has had in the area of high magnetic field research, as described below.
3

European perspectives
On a European scale, a major step was the funding in 2005 under FP6 of the EuroMagNET Integrated
Infrastructure Initiative (I3), which united most of the European high field facilities, with a common
transnational access programme, networking and joint research activities ( www.euromagnet.org ). Its
successor, EuroMagNETII, has recently started (1/1/2009, for 4 years), this time integrating all major
European high field facilities (LNCMI Toulouse/Grenoble, HLD Dresden and HFML Nijmegen)
(www.euromagnet2.eu), with the LNCMI as coordinator. A further integration of these four
installations into one distributed European Magnetic Field Laboratory (EMFL, www.emfl.eu ) has
been proposed, and this proposal is now part of the ESFRI Roadmap. The EMFL proposal also
foresees the integration of high magnetic fields with the ESRF X ray source and the ILL neutron
source in Grenoble. These two large facilities have proposed the construction of a joint high field
faculty on their site in the context of their upgrade programs, which are also part of the ESRFI
Roadmap. The EMFL proposal is currently being elaborated in the context of a FP7-Infrastructures-
Preparatory Phase call, dedicated to the new arrivals on the ESRFI Roadmap (deadline 3/12/2009,
result spring 2010).
Organigramme
Laboratoire National des Champs Magnétiques Intenses UPR 3228
Gestion &
accompagnement
Administration
Hygiene &
securité
Formation
Communication
Utilisateurs
Batiments
Production champs
magnétiques
Aimants DC
Alimentation DC
Generateurs &
bobines pulsés
Bobine
hybride
MegaGauss
Matériaux
Direction
Science
Metaux & supra
conducteurs
Nano & meso
Resonance
magnétique
Magnétisme
Moleculaire
Optique, rayons
X, neutrons
Soutien technique
Cryogénie,
Pression & Vide
Informatique
Atelier
Mécanique
Instrumentation
115 personnes
4

Field generation
Technical perspectives
Introduction
The continuous quest for higher and higher magnetic fields is part of a more general trend of studying
matter under more and more extreme conditions, like very high pressures or very low temperatures. At
the same time, the ongoing improvements of superconducting magnet technology (state of the art 23,5
Tesla) force the high field facilities to increase the field strength they can propose to their users to
higher values, in order to be able to offer sufficient added value and to provide a convincing reason for
their existence. An ad-hoc criterion that has been respected over the last decades is that when going
from superconducting magnets to resistive magnets to pulsed magnets, the maximum field strength
doubles each time.
Recent developments in superconducting technology suggest that superconducting magnets will cross
the 25 T mark within the next 5 years. High Tc superconductors offer in principle a potential to go
much higher, but major materials processing issues have to be solved before such a potential can be
realized. The current maximum value for a DC resistive magnetic field is 45 T (a hybrid magnet at the
NHMFL in Tallahassee, with similar hybrid magnet projects underway in Grenoble (see below),
Nijmegen and Heifei), whereas a 60 T hybrid project is being considered by the NHMFL. For purely
resistive magnets, the field record is at 35 T (Grenoble and Tallahassee), but the LNCMI-G has an
ongoing program to push this value towards 40 T by 2012 and a similar project exists at the NHMFL.
For non-destructive pulsed magnets, the maximum field value is 89 T (obtained at the NHMFL in Los
Alamos with a multi-coil system, with similar projects underway in Dresden and Toulouse). The Los
Alamos and Dresden projects are aiming at 100 Tesla, and are steadily progressing towards that aim.
The Toulouse facility can not currently develop a credible 100 T project, because of the limitations of
its current high voltage capacitor bank and because of security issues with the magnet cells. In the
context of the Contrat Plan Etat Region Midi Pyrénées 2007-2013, an extension of the building with
explosion-safe cells and fast high voltage modules are foreseen, that will remedy these problems,
which will open the route towards 100 T, and that will allow the LNCMI-T to maintain its long term
international competitiveness.
To go beyond the field limits imposed by the mechanical properties of current engineering materials,
one has to accept that the magnet is destroyed during a magnetic field pulse. The use of a very fast
(sub microsecond rise time) high voltage (60 kV) and high current (2 MA) generator allows the use of
single turn coils that are destroyed during a field pulse without harming the experimental setup inside
the coil. Such an installation has been constructed at the LNCMI-T and will be progressively put into
use to study matter under extremely high magnetic fields (up to 300 T).
5

Materials research
The maximum magnetic field that a well designed DC resistive magnet can produce is limited both by
the Lorentz forces and by the Joule heating. Therefore a strong and low resistivity conductor is needed
for such magnets, two requirement that are mutually exclusive.
Pulsed magnets partly free themselves from the latter constraint by limiting the magnetic field duration
to a value that leaves the magnet after the pulse at an acceptable temperature. This allows to use
stronger materials that enable the magnet to generate much higher fields. However, as the necessary
pulse duration for a sensitive experiment cannot be arbitrarily reduced, also the materials for pulsed
magnets should have a reasonable electrical conductivity.
The LNCMI-T has a long standing tradition in materials research and development for high strength
conductors, whereas the LNCMI-G has so far relied on commercially available alloys. The merger
allows the LNCMI-G to benefit from the know-how and conductors of the LCNMI-T. In particular the
use of stainless steel jacketed copper conductors (CuXSSY) and of cold worked copper-silver alloys
(CuAg) could contribute greatly to increasing the field strength of the DC resistive field magnets in
Grenoble (see figure below). Part of the materials research effort at LNCMI-T will be directed towards
such aims, and collaborations with industrial partners will be sought.
Yield Strength (MPa)
800
700
600
500
400
300
200
Cu70SS30
Cu80SS20
Cu90SS10
GlidCop-AL15
40 45 50 55
Electrical conductivity @ 20°C (MS/m) (58 MS/m = 100
%IACS)
CuAg0.03
Summary of different conductors in use for resistive pulsed (red squares) and DC (other symbols)
magnets at the LNCMI
In order to limit the electrical power consumption of Grenoble DC high field installation, it will be
necessary to participate in the development of superconductor materials that are capable to be used in
hybrid magnets, or in stand alone 25+ T all superconducting magnets. To this aim, several
collaborations are underway with external partners.
6

Evolution of standard DC resistive magnets
Based on the expertise that the LNCMI-G has acquired over the recent years with the polyhelix
technology, on recent advances in commercial copper alloys and radial cooling techniques, and backed
by extensive finite element modelling, it is extrapolated that DC resistive fields up to 39 T should be
possible, within a time span of 5 years (see figure below). The R&D to realize this potential will be
one of the priorities of the LNCMI-G for the coming years. Provided that the necessary financial
means can be found, this will bring the LNCMI back to the leading position in high magnetic field
technology.
The improved coil efficiency resulting from the above developments will also allow to generate
somewhat more modest fields (28+ Tesla) with only 12 MW electrical power consumption. This will
allow to operate two such magnets simultaneously, greatly increasing the LNCMI-G capacity and will
allow to do high field experiments at reduced electricity consumption. In view of the long term
sustainability of a high field facility, this latter aspect is becoming more and more important.
Another route to increasing the field strength available for experiments at constant electrical power
consumption and with the available conductors would be to reduce the bore size e.g. to 25 mm. This
will of course complicate cryogenics and other aspects of the experiments to be performed in such a
magnet. By implementing the bore size reduction by means of a magnet insert that operates at lower
temperature (e.g. cooled by liquid nitrogen), an even more significant gain in field strength, can be
obtained. First estimates suggest fields in excess of 42 T for such a configuration, which will be
studied and modelled in greater detail in the future.
45
40
35
30
25
20
15
10
5
0
Réalisés
Avenir
1980 1990 2000 2010 2020
Evolution, realized and expected, of the maximum static magnetic field available at LNCMI-G
7

Hybrid magnet
Hybrid magnets, the combination of a resistive inner coil with a superconducting outer one, allow to
generate the highest continuous magnetic fields for a given electrical power installation. The present
state-of-the-art hybrid magnet system has been built by the NHMFL at Tallahassee in Florida and has
produced the highest DC magnetic field equal to 45.2 T in a 32 mm bore.
Table 1 : Hybrid magnets and projects with continuous field higher than 35 T in the world
Place Magnetic field Remarks
Tsukuba, Japan 35 T = 14 T (Nb3Sn) + 21 T (15 MW) Operational
Tallahassee, US 45 T = 11 T (Nb3Sn) + 34 T (30 MW) Operational
Grenoble, France 42 T = 8.5 T (NbTi) + 33.5 T (24 MW) Planned for 2013
Nijmegen, The Netherlands 42 T = 12 T (Nb3Sn) + 30 T (20 MW) Planned for 2013
Hefei, China 42 T = 11 T (Nb3Sn) + 29 T (20 MW) Planned for 2013
Tallahassee, USA 36 T = 14 T (Nb3Sn) + 22 T (12 MW) Planned for 2012
Unfortunately, the last hybrid coil project of LNCMI-G, aiming to produce 40 T, failed
because of a defect in the superconducting outsert coil produced in industry. In order to maintain the
competitiveness and attractiveness of the LNCMI-G it was decided end of 2006 to replace the outsert
coil instead of fully restarting a new project, mostly because of the shorter delivery time scale. The
base-line for the coil sub-assemblies of the hybrid magnet is given in Table 2 together with their
magnetic field contributions. Ultimately, the field produced by the poly-helix and Bitter coils is
planned to be further increased, typically up to 36-37 T, which should allow for a 43-44 T hybrid
magnet.
Table 2 : Composition of the 42T hybrid magnet
Hybrid subpart Magnetic Field
14 series connected helix coils 24.5 T
2 series connected Bitter coils 9 T
1 superconducting pancake coil 8.5 T
Table 3 : Main parameters of the superconducting outsert coil
Characteristics Values
Inner/outer radius 550/913 mm
Height 1400 mm
Inductance 3 H
Nominal current (8.5 T) 7100 A
Stored Energy 76 MJ
Operating Temperature 1.8 K
A conceptual study for the new superconducting outsert of the hybrid coil project has been
prepared in collaboration with IRFU-CEA, and reviewed by internal and external experts. The most
important choices that have been made can be summarized in five key points:
- High current to minimize the coil self-inductance and reduce voltage levels during quenches,
- Nb-Ti superconductor at 1.8 K,
- Vacuum impregnated coil with internal cooling,
- Insulated conductor to increase the safety and reliability,
- A 30 K copper screen with stainless steel reinforcement to absorb a part of the induced field
effects in case of sudden loss of the power of the resistive coils.
The already existing infrastructure of the hybrid magnet has fixed the maximal dimensions of the
superconducting coil, which are listed in Table 3 together with the main parameters. To produce a
8

field in the range 8.5-9 T, the required overall current density should be slightly below 30 A/mm2,
which is a usual value for large scale superconducting magnets. The protection of the superconducting
coil during a quench will be ensured by an energy dump resistor of 70 mΩ �limiting the maximum
temperature to about 80 K for a maximum voltage of 500 V. The superconducting coil will consist of
37 double pancakes with 26 turns per pancake and will require a current of 7100 A to produce the
design field value of 8.5 T in a 1100 mm bore diameter. The double pancakes are wound from a
Rutherford Cable On Conduit Conductor (RCOCC) composed by a Nb-Ti/Cu Rutherford cable brazed
on a Cu-Ag stabiliser. The required critical current of the cable is about 19 kA at 1.8 K in the peak
field of 9.4 T. To ensure the internal cooling at 1.8 K of the fully impregnated coil winding, the
stabiliser of each double pancake is equipped of a cooling channel (Fig.1) with both ends open to the
static bath of pressurized superfluid He.
a) b)
Fig. 1. Rutherford Cable On Conduit Conductor (RCOCC) specially developed for the Hybrid coil project; a) 2D crosssection
of the conductor (drawing not to scale and dimensions are given in mm; b) Example of a sample produced by Alstom
and Aurubis.
To produce the magnetic field of 8.5 T in the 1.1 m diameter bore, the maximal stress on the
conductor was calculated to reach 170 MPa at 1.8 K, including thermal contraction effects. The elastic
limit and the yield stress have been then measured at various temperatures (300 K, 77 K, 4.2 K) on
various samples of stabiliser in CuOFE and Cu-Ag0.04% with the proper geometry and various
hardening levels. They were obtained from extrusion process and hereafter submitted to a thermal
treatment reproducing the brazing process. Tests results give an elastic limit larger than 300 MPa at
4.2 K, which provides a quit comfortable margin.
Concerning thermal stabilities of the superconducting coil, a dedicated analysis has shown that
with the design parameters of the conductor the cryostability criteria is fulfilled, reducing to minimum
the probability of quench occurrence. In case of a disruption of resistive magnets eddy current losses
should be kept below the quench energy level of the superconductor. Numerical calculations of eddy
current losses in this faulty mode have shown that, despite the addition of a Cu/stainless steel
cylindrical shield cooled at 30 K, the Residual Resistive Ratio (RRR) of the stabiliser should be kept
below the value of 50 to avoid quenching of the superconductor. This consideration has driven the
choice of Cu-Ag0.04% for the stabiliser. To allow the tuning of the parameter used in numerical
calculations, a sample of 3x5 RCOCC of 330 mm long have been vacuum impregnated with epoxy
resin to be tested in compression. This mock-up was also used to test the electrical insulation between
turns after the impregnation process and successful results were obtained. Results obtained from first
conductor developments and tests have allowed to validate the design of the new superconducting
outsert coil. The study of the industrialisation process to produce all required RCOCC unit lengths of
260 m long is in progress despite the fact that Alstom has decided to close its production lines of
superconducting cables. The call for tenders for the RCOCC has been issue and the choice of the
supplier is in progress. The ones related to the winding of the coil, the construction of the LHe cryostat
and the cryogenics satellite with the caloduc are planned for 2010 together with the remaining
infrastructures and the power converter. The first run at 42 T can be expected in 2012 just after the
commissioning of the superconducting coil without resistive inserts.
9

DC magnet for 60 GHz ECRIS (IN2P3/INP collaboration)
The LNCMI is a partner in the “beta beam project”, one of the three likely scenarios
considered in the EURO-ν program (2008-2012) for future neutrino oscillation facilities. The aim is to
use the β-decay of radioactive ions to produce neutrino beams. The LNCMI is collaborating with the
Laboratoire de Physique Subatomique et de Cosmology (LPSC Grenoble, IN2P3-UJF) to use its
unique high field technology to develop a high frequency (60 GHz) pulsed electron cyclotron
resonance ion source (ECRIS) for the beam preparation. For efficient ionization, the ion source
volume has to be small, and the magnetic field high (6 T at the injection, 3 T at the extraction, a closed
surface with |B| = 2.1 T). We have designed a prototype cusp magnetic structure using the polyhelix
techniques for this magnet. 2D and 3D simulations were used to define the helix geometries.
Calculations have shown that it is necessary to use two concentric radially cooled helices at the
extraction side and 2 at the injection, using a variable pitch for the internal injection coil. An
aluminium prototype of the internal injection coil has been constructed in 2008 and has been used to
validate at low current density the calculation of the magnetic structure. The 60 GHz magnetic
structure prototype (copper helices in their housing, electrical connections and water cooling
environment) is now under construction and is expected to be tested at the beginning of 2010 at half
field with a direct connection to two of the four power supplies of the LNCMI-G. If the test is
successful, preparation of a test at full magnetic field, corresponding to 60 GHz ECR, that necessitates
the use of the 4 power supplies will be organized in the second half of 2010. Afterwards a complete
gyrotron experimental hall could be installed at the LNCMI-G in the framework of a collaboration
between IN2P3 and INP. As the gyrotron will be pulsed, it may be considered to operate the magnet in
a synchronous pulsed mode, thereby greatly reducing its average power consumption, taking
advantage of the expertise of the LNCMI-T in this domain.
DC magnets with high temperature superconductors (CERN/CEA/Nexans collaboration)
The electricity bill is one of the major expenses of the LNCMI, so replacing part of the resistive
magnet by superconducting coils is very worthwhile. As it is foreseeable that electricity prices will
continue to go up, the LNCMI-G must dedicate part of its energy to the development of
superconductor materials and coil technology, in collaboration with other laboratories. Based on the
expertise of the LNCMI-G with the characterization of low and high Tc superconductors, joint R&D
projects were started for the development of prototype magnets using high temperature
superconductors, as these are the only possible candidates for high field magnets.
The first one is funded by an ANR project (Stock E) that has started in 2009. The aim is to
build insert coils using BISCCO wires and to test it in a background magnetic field of 20 Tesla
available at the LNCMI-G. The main partners are the CNRS (LNCMI/IN/CRETA), the CEA-IRFU
and the NEXANS Company.
The second one is linked to the EUCARD project led by CERN that aims at defining the
technologies that will be used for the next generation of accelerators. One of ultimate goal of this large
international project is to design a HTS dipole to be inserted in a 12 T Nb3Sn dipole constructed by the
CEA. The deliverables from the CNRS for this project are BISCCO and YBaCuO inserts to test in
high field environment. Critical issues, such as winding and quench detection, are integral parts of the
two projects. If successful, these projects will permit to define during the period 2012-2014 the
technical basis for a future upgrade of the LNCMI hybrid currently under construction that could be
operational in 2015. The aim of this upgrade would be to replace the outer resistive magnet nested in
the NbTi large bore coils by high Tc superconductors. This could give a field of 45+ Tesla or a
compact hybrid magnet in the range of 40 Tesla with low power consumption. Such a magnet would
be useful for experiments with long data acquisitions times, like NMR or neutron scattering. The use
of MgB2 superconductor for such a configuration will also be studied, in collaboration with an
industrial partner.
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Evolution of pulsed field magnets
The continuous increase of resistive magnetic fields obliges the pulsed field infrastructures to
continuously strive for higher pulsed fields. It is clear that as a result of the large efforts devoted to this
aim in the USA, Japan, China and in Germany, within the next 10 years, the ‘magical’ 100 T limit will
be reached. This progress can be realized through three different aspects.
- Increase in electrical energy. The maximum field increases however only logarithmically with the
electrical energy at constant mechanical stress. Furthermore, large stored energies pose serious
security issues for coil operation and require very large investments.
- Improvements in material parameters. The LNCMI-T has an ongoing effort in developing conductors
with a better trade-off between mechanical strength and electrical conductivity. In particular the
development of nano-filamentary conductors has proven to be very promising and this effort will be
continued.
- Improvements in coil design and fabrication. By a better understanding of coil failure mechanism
and more detailed modelling, higher operating fields can be realized with the same energy and
materials. By going to more elaborate multi coil designs, which allow for more design freedom, higher
fields can be generated, at the expense of higher fabrication and operating complexity. During the last
few years, the LNCMI-T has developed extensive software tools to do analytical and finite element
modelling that will be put to good use to improve the design of such multi coil systems.
In order to continue to improve the performance of its magnets, the LNCMI-T will upgrade its
installation through the purchase of a rapid mobile capacitor bank totalling 6 MJ of stored energy,
bringing the total energy to 20 MJ. This purchase is planned in the context of the CPER Midi Pyrénées
2007-2013. The 6MJ bank alone will allow fast (10 ms) monolithic coils to reach 75 Tesla, and in
combination with the slow original 14MJ bank, will allow for dual coil operation in the 90+ T range,
whilst providing sufficient pulse duration for sensitive measurements. This would bring the LNCMI-T
back to the front of the pulsed field installations in terms of performance.
The usefulness of pulsed magnets is however not only determined by their maximum field but also by
other parameters, like geometry, bore size, noise and cool down time. Over the last few years, the
LNCMI-T engineers have made great progress in reducing the cool down time, thereby providing
more shots per day to the users. This strategy will be further pursued, in particular by using the
polyhelix technology developed at the LNCMI-G for static field coils, which allows for very efficient
heat extraction. Although it is not expected that polyhelix technology permits the generation of very
high fields, the high duty cycle could be very useful in experiments where long data acquisition times
are needed and where DC magnets cannot provide the required field strengths.
Single turn coils
While the non-destructive generation of pulsed magnetic fields is currently limited to less than 90 T,
destructive techniques have been used as early as 1973 to generate fields in excess of 150 T for
scientific experiments. In particular capacitor-driven single-turn coils (STCs) have revealed
considerable potential due to their cost efficiency, high repetition rate and the fact that the coil
explodes outwardly, which - unlike flux compression experiments - leaves sample holders and
cryostats intact. In 1985 a STC has therefore been installed at the ISSP Tokyo which has provided a
considerable number of scientific publications. Due to their intrinsically short pulse duration of
typically 5 to 10 us, STCs have nevertheless failed to emerge as a widely acknowledged research tool.
The rapid evolution of fast electronics and opto-electronics has recently renewed the interest in STCs.
State-of-the-art high-speed data acquisition systems, the EMP-proof design of electronic circuits and
the use of optical transmitters are effective means to cope with the induced voltages and the trigger
noise generated during a discharge. Three major laboratories have therefore taken up the challenge to
develop new measurement techniques for STCs: The NHMFL at Los Alamos, the ISSP Tokyo and,
more recently, the LNCMI Toulouse. In Toulouse we focus on optical techniques which are most
appropriate for STCs. The development of a setup for wavelength-resolved measurements in the nearinfrared
using an InGaAs detector array has actually started. Making use of the recent boom in
Terahertz-technology we will also establish a setup for EPR measurements. It has been agreed, that the
results of these technical developments will be exchanged freely with the NHMFL at Los Alamos,
which is pursuing complementary techniques such as wire-less conductivity measurements.
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Scientific projects involving the Toulouse STC (also called MegaGauss) include the infrared
spectroscopy of carbon-based nanostructures. Key issues for this class of materials are manifestations
of the Aharonov-Bohm effect with and without quantum confinement, the breakdown of the quasirelativistic
regime in graphene and electron-hole asymmetries in the same material. We also envisage
measurements on diamond whose low mobility forestalls the resolution of resonant transitions unless
very high magnetic fields are applied. Another important class of materials, whose low mobility has
foiled most attempts to investigate their electronic bandstructure, is that of organic conductors. We
plan to investigate these systems either in-house or in collaboration with various national and
international groups who have already expressed their interest in using the Toulouse STC.
High magnetic fields for neutron and X-ray scattering (ESRF/ILL collaboration)
Neutron and X ray scattering are often used to characterize magnetic structures of materials, in
particular at high flux large facility sources like the Institut Laue Langevin (ILL) and the European
Synchrotron Radiation Facility (ESRF). The maximum magnetic field available at such facilities is
typically around 15 T, provided by dedicated superconducting magnets, but a strong scientific need
exists to extend this value to much higher fields, in order to study high field phenomena that have been
identified in high field facilities. The LNCMI has been engaged for several years already to provide
much higher fields, 30 T or more, for experiments at these two facilities.
The LNCMI-T has developed and constructed mobile high voltage capacitor banks (initially 150 kJ,
since 2009, 1 MJ) and the corresponding pulsed field magnets to operate on beam lines at the ESRF
and the ILL. Both large scattering angle solenoidal magnets and a radial access split coil magnet have
been constructed and operated, together with the corresponding cryogenics, and the first scientific
results obtained with this approach validate its usefulness and confirm the scientific case for high
magnetic fields on neutron and X ray beam lines. The ESRF has now partly dedicated one beam line
(ID6) to operate with the LNCMI mobile pulsed field installation. The mobile generator has also been
used at the kilojoule laser source at LULI (Palaiseau) and its use at SOLEIL and at the SLS
(Switzerland) is being considered. This strategy will be further pursued in the future, aiming for even
higher fields and larger duty cycles in order to more efficiently use the beam time at such facilities that
has a very limited availability. Part of the upgrade of the LNCMI-T, funded by the CPER Midi
Pyrenees 2007-2013, will provide fast capacitor bank modules totalling 6 MJ. These will be
constructed and operated in sea containers, so that they can also be moved to other facilities, like ILL
and ESRF, to perform pulsed field measurements. With such a configuration, fields in excess of 60 T
are feasible at such facilities, opening entirely new possibilities for experiments.
However, not all scattering experiments provide sufficient signal to noise to give meaningful results
with a pulsed field installation and a beam time of typically one week. Therefore, there is a clear need
to install very high static magnetic fields on these beam lines. To define the technical basis of such an
installation, a design study has started in 2007, in the framework of a work package in the FP7 design
study ‘ESRFUpgrade’, uniting ILL, ESRF and the LNCMI. The conclusion of this design study is that
the electrical power and the corresponding cooling capacity (40 MW) can be made available at the
ILL-ESRF site. In the same work package two DC resistive magnets designs have been considered in
detail:
1 - a horizontal field magnet suitable for scattering and absorption experiments. The design is
derived from the actual 35 T/34 mm vertical field magnet operating at the LNCMI-G using
longitudinally cooled helix technology
2 - a split magnet design. An innovative design has been proposed and studied that takes
benefits from the experience of the LNCMI in operating radially cooled magnets. In this configuration,
the high heat transfer coefficients required to cool high field magnets are obtained in radial channels
arranged between the magnet turns. Consequently, the innermost windings can be cooled more
efficiently than traditional longitudinally cooled windings. It is then possible to increase current
densities in the innermost windings resulting in compact magnet designs. This is of primary concern,
to be able to implant the magnet in the limited space available for instrumentation on neutron or X ray
beam lines. Moreover, the main cooling water stream flows in the direction parallel to the mid plane
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which offers a larger flexibility for the design of the mechanical devices necessary to hold the
attracting forces existing between the two halves of the magnet.
The results were reported in February 2009 in the final
report of the WP 12 of the ESRF upgrade design study. As far as
magnetic configuration are concerned they are the following: 40
Tesla could be reached in the horizontal configuration, 30 Tesla in
the split configuration. Currently the lack of funding hinders the
realization of a prototype to test the innovations proposed for the
split coil. As an intermediate step, a 12 MW magnetic table design
is proposed (see figure), that will help to secure the design proposed
for the split magnet and that will give access to a maximum field
of 25 T at a short distance from the surface (50 mm) as compared
to the standard distance of 450 mm. The laboratory is now
exploring the possibility to develop this prototype magnet in the
frame of collaboration with the technological community interested
to perform levitation studies (Air Liquide for the development of cryogenic rocket propellants).
The framework in which the realization of the ILL/ESRF installation can take place and its relation
with the LNCMI remain to be developed. It seems logical to try to integrate the ILL/ESRF high field
installation into the ongoing European Magnetic Field Laboratory project.
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Instrumentation
Cryogenics
Almost all experiments performed at the LNMCI are done under cryogenic conditions. The limited
space available inside high field magnets, and the presence of strong time varying fields in pulsed
magnets that prohibit the use of metals for certain parts, make life difficult for the cryogenics
engineers at the LNMCI. However, a large part of the success of the LNCMI is not only based on the
presence of high fields, but also on the presence of very low temperatures (20 mK at LNCMI-G, 50
mK at LNCMI-T) that allow to study matter under very extreme conditions. In fact, the minimum
bores size of a magnet, and thereby the maximum field that can be generated for a given electrical
power or energy, is partly determined by the cryogenics. Therefore a significant effort will be devoted
to the miniaturization of the cryogenics.
The cryogenics related to the hybrid magnet is also very demanding, not because of the low
temperatures (operating temperature of the superconducting outsert is 1.8 K) or limited space, but
because of the mass to be maintained at this temperature (around 20 tonnes) and the large consumption
of liquid helium in the case of field variations (up to 100 l/h). The presence of a cryogenics group at
the LNMCI is therefore of the essence.
Experimental techniques
Very often the magnetic field acts as a thermodynamic parameter that brings the system under study
into a new state that is then characterized by other techniques (transport, optics, specific heat etc). It is
therefore clear that the scientific interest of applying high fields depends also on the characterization
techniques that can be used under such conditions. Each additional characterization technique opens
new classes of systems that can be meaningfully studied under high magnetic fields, and thereby
enlarges the potential user community of the LNCMI. The development of new characterization
techniques in high magnetic fields, or the improvement of existing ones, is therefore part of the core
activities of the LNCMI and should be considered in this light. Such developments are often done in
collaboration with user groups or groups that are experts in such techniques outside magnetic fields.
Examples of techniques that will be further developed in the coming years at the LNCMI are high
resolution NMR, NMR in pulsed fields, ultrasound spectroscopy, magneto-striction measurements,
photon correlation techniques, single nano-object transport and spectroscopy, and X ray and neutron
scattering. Other techniques may be developed if the LNCMI users express sufficient interest and if
the necessary financial support can be found.
14

Scientific perspectives
The scientific activities at the LNCMI-T and LNCMI-G show a large overlap in terms of systems
studied and techniques used. It is therefore expected that there will be a strong synergy between the
scientific and instrumentation efforts at the two sites and the first joint publications will appear soon.
Below a unified vision of the future scientific activities is presented. It should however be noted the
activities can be strongly influenced by new, unforeseen scientific developments. The previous four
year perspectives of the LNCMP and the LCMI did not foresee the discovery of graphene, the high Tc
pnictide superconductors nor the revival of the cuprates, subjects that now together make up more than
50 % of the activities of the LNCMI.
Magneto-transport in nano- and meso-objects
Quantum phenomena in mesoscopic systems under microwave radiation and high pressure
The project is to study the electronic and physics properties of semiconductor mesoscopic
systems whose characteristic size is less than 100 nm (2DEG, quantum wires, interferometers and
systems with artificial scatters: anti-dots). These systems have proved to be unique, for studies of
coherent and interaction effects in structures containing few and many electrons and also for studies of
the response of these systems to external influences such a linear polarization microwave radiation and
mechanical strength under high pressure effect. Microwave radiation will be investigated on clean
mesoscopic systems with ballistic and quasi-ballistic transport (array with asymmetrical anti-dots,
quantum wires, rings and open dots). By means of the so-called ratchet effect, such systems can
convert microwave radiation into direct current and this phenomenon will be studied for its potential
use in microwave nano-detectors and current generators. High pressure methods will provide a tool for
the study of many-body effects in disordered 2D electrons systems for example, for the study of MIT,
fluctuation potential, electron-electron correlations effects and magneto-tunnelling
Transport phenomena in multilayer systems
The fractional quantum Hall effect is a many-body phenomenon where electron-electron
correlations occur and form states at fractional Landau level filling factors, in contrast to the single
particle description of the integer quantum Hall effect. Such interactions can also occur if several
layers are in close proximity, separated only by a thin barrier. This leads to new interactions between
electrons in adjacent layers and to new correlated states in the fractional quantum Hall effect.
Additionally for low magnetic fields, an interference of multilayer subband scattering arises in
the longitudinal resistance. If such systems are exposed to microwaves, microwave absorption can be
observed. In general, multilayer two-dimensional systems consist of n layers separated by tunneling
barriers. Future work will focus on multilayer systems with n > 2, mostly triple quantum wells (n = 3)
but also systems with more layers. Beyond the well-known Shubnikov-de Haas oscillations in single
layers with one occupied subband, which occur when Landau levels are passing consecutively the
Fermi level, a coupled bilayer system (n = 2) with two occupied exhibits additional magnetointersubband
(MIS) oscillations due to the alignment of Landau levels from both wells at the Fermi
level. For low magnetic fields, it has been shown that photo-resistance in double quantum wells (n =
2) exposed to microwave can be explained by the inelastic mechanism, generalized to the two-subband
case. The interference phenomenon of MIS oscillations and microwave induced resistance oscillations
(MIROs) in a double quantum well appears because the photo-induced part of the electron
distribution, which oscillates as a function of microwave frequency, is modified owing to subband
coupling and becomes also an oscillating function of the subband separation. In a trilayer system, MIS
oscillations occur due to three subbands which are aligned at the Fermi level with increasing magnetic
field. Therefore, studies of MIS oscillations in triple quantum wells exposed to microwave irradiation
will yield to further details. A multi-component quantum Hall system, which consists of multiple
quantum wells separated by tunnelling barriers, have exhibited many interesting phenomena in a
strong perpendicular magnetic field due to interlayer electronic correlations. Previous theoretical
works suggested several possible ground states in multilayer systems. The first candidate state is the
spontaneous coherent mini-band states in a super-lattice (SL) quantum Hall system. This state is an
15

analogue of the interlayer coherent state at Landau filling factor = 1 in double well structures. The
second candidate state is the solid state phase (Wigner crystals) with different configurations
depending on the interlayer separation. A third candidate state is a staged liquid state, which consists
of independent layer states with unequal density. Recently, it has been argued that another ground
state, a so-called dimer state, is favoured for a large number of layers with small interlayer distance.
The superlattice separates into pairs of adjacent interlayer coherent states, while such coherence is
absent between layers of different pairs.
Magnetic quantum wires
The aim of our research activity on magnetic quantum wires is to investigate the properties of
a two dimensional electron gas in a gradient of magnetic field. The theoretical predictions to verify
are numerous and one can safely expect that many more will appear when experimental results start
stimulating further investigation. We have for example demonstrated theoretically that electrons
oscillate in a gradient of magnetic field and thus undergo spin resonance. As electron oscillations are
propelled by a direct electric field, spin resonance is induced without microwaves. In fact, we are
currently measuring the microwave fluorescence of arrays of magnetic quantum wires. Another
experiment is directed to coherently controlling the current channelled by snake orbits with resonant
microwave irradiation. Further predictions concerning electron densities below the Mott transition
suggest the formation of spin helices and the decoupling between charge and spin excitations. Future
experiments will be designed with such effects in mind.
Magneto-spectroscopy of nano- and meso-objects
Below we briefly summarize the research topics in the area of spectroscopy of nano- and meso-object
that we are planning to develop for the coming years. However, we will always adapt our strategy to
the evolution in this area driven by outside developments and the needs of our external users
Electronic properties of graphene and its derivative
a) investigations of the dynamics of photocreated carries in graphene based structures by means of
pump-probe experiments; studies of the effect of Landau quantization on the carrier dynamics.
b) investigations of the electron-phonon interaction in graphene by means of Raman scattering
experiments in high magnetic fields; search for theoretically predicted effects of resonant interaction
between electronic and phonon excitations
c) studies of thermal conductivity of the graphene membranes
d) search for a possible light emission from graphene structures including electrically driven cyclotron
resonance emission in high magnetic fields
e) magneto-spectroscopic studies of the graphene bilayer, and of graphene deposited on different
substrates
f) magneto-spectroscopy of large area graphene and hydrogenated graphene grown on Ni surface
g) polarisation resolved Landau level spectroscopy of graphene structures in pulsed magnetic fields
h) resonant magneto-Raman studies of carbon nanotubes
Quantum Hall phenomena in II/VI CdTe quantum well structures (with large Zeeman splitting)
a) investigations of the effects of electron-electron interactions in fully populated Landau levels, by
means of magneto-photoluminescence experiments
b) studies of fully spin polarised quantum Hall states at fractional filling factors 4/3 and 5/3
c) investigations of resonant effects in electron-phonon coupling (in these strongly polar crystals)
Quantum dot systems
a) high field spectroscopy of CdTe quantum dots with single Mn 2+ magnetic ions
b) microwave manipulation of a single Mn 2+ ion in a single CdTe quantum dot
c) investigations of diffusion processes of two-dimensional excitons in a GaAs/AlAs bilayer by means
of single dot spectroscopy
16

Development of photon correlation techniques in high magnetic fields.
We will study of semiconductor quantum dot structures, of single nanotubes, and of possible Bose
condensate phases of excitons in Cu2O
Metals and superconductors
The following presents the current vision of the scientific objectives in the area of metals and
superconductors for the next several years. However, given that almost every year new compounds
with fascinating physical properties are discovered or new exciting theoretical predictions are made,
other experimental projects might emerge in the future.
Ferromagnetic superconductors
We are going to continue our investigations of ferromagnetic superconductors, in particular URhGe.
Once high quality single crystals of the recently discovered ferromagnetic superconductor UCoGe
become available, we plan to verify whether the same physics discovered in URhGe applies to this
compound as well. To get further insight into the fascinating physics of these compounds, we plan to
perform specific heat and de Haas-van Alphen effect measurements across the field-induced quantum
critical point. Specific heat measurements will prove the bulk nature of the re-entrant
superconductivity and provide the field dependence of the average effective mass leading to better
understanding of the origin of the exotic superconducting phase. The de Haas-van Alphen effect
measurements will depict the Fermi-surface topology both below and above the quantum critical point.
It will additionally allow us to extract the effective mass of each separate sheet of the Fermi-surface as
well as its field and spin-orientation dependence.
Heavy fermions
Metamagnetic transitions are quite common for heavy fermion materials. The transitions are usually of
first order. A line of first order transitions terminates at a critical end point. By tuning one additional
parameter, the critical end point can sometimes be driven to zero temperature. In this case, a quantum
critical end point arises. This, in turn, often leads to the appearance of a new phase. The exact nature
of the metamagnetic transitions in heavy fermion compounds remains obscure. Two competing
theoretical scenarios have been proposed. The localization scenario proposes that the itinerant felectrons
suddenly localize at the metamagnetic transitions, and the heavy-fermion state disappears at
that point. An alternative scenario is given by a continuous evolution of the Fermi surface, in which
the localization of the f-electrons is not tied to the metamagnetic transition. Experimentally, one of the
major obstacles in investigating field-induced metamagnetic transition in heavy fermion compounds is
that they often occur at high field, well above 20 Tesla. In order to shed more light on the mechanism
of metamagnetic transitions, we will carry out transport, de Haas-van Alphen effect and specific heat
measurements in several Ce- and U-based heavy fermions. One such candidate is CeIrIn5 where a
field-induced meatamagnetic transition occurs at 28 Tesla. One of the objectives is to verify whether
the metamagnetic transition gives rise to a quantum critical (end) point and, eventually, new quantum
phases. The application of high pressure might also be required to study these transitions.
Other heavy fermion systems will be studied; in particular the “hidden-ordered” paramagnet URu2Si2
and the antiferromagnet CeRh2Si2 as well as compounds without inversion centre of symmetry, such
as CeRhSi3, CeIrSi3 and CePt3Si. Most of such compounds were studied only by transport
measurements and at moderate magnetic fields so far due to the extremely difficult experimental
conditions. Our plan is to advance further on by low temperature transport, specific heat, torque and
Nernst effect measurements under high field and where possible under high pressure. One of the key
theoretical predictions, the field dependent splitting of the Fermi-surface for non-centrosymmetric
compounds, is still lacking experimental confirmation, most probably due to insufficiently high field
of the previous de Haas-van Alphen effect measurements. To this end, we are going to extend such
measurements up to the highest fields available at the LNCMI at very low temperatures.
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Pnictides
Superconductivity with unexpectedly high critical temperatures was recently discovered in a whole
new class of materials, iron-based pnictides. In some of them, superconductivity emerges already at
ambient pressure, while an application of high pressure is required to induce a superconducting
transition in some others. In spite of considerable experimental and theoretical efforts, the
understanding of underlying mechanism of superconductivity in such compounds is still far from
being achieved. One reason of slow progress is that high quality single crystals of these materials
became available only very recently. Another one is that some of the key experiments require extreme
experimental conditions such as very low temperatures, high magnetic fields and high pressures, as
well as combinations of those. Such experimental conditions are not readily available in most of the
laboratories worldwide. Built on our expertise of measurements under extreme conditions, we plan to
contribute to answering some of the fundamental questions related to iron-based superconductors.
Transport and specific heat measurements both under magnetic field and pressure will allow us to
explore in some details the phase diagrams of these materials and investigate their superconducting
and normal state electronic properties. de Haas-van Alphen effect measurements will be employed for
the direct exploration of the Fermi-surface and determination of the quasiparticle effective masses,
which are directly related to the strength of the electronic correlations. What's more, in
superconductors, the comparison of the measured effective masses with the calculated band masses
provides a direct access to the strength of the electron-phonon coupling. Such coupling is suggested as
the origin of superconductivity in iron-based pnictides by some theories. Other theoretical models
suggest a multi-band superconductivity in Fe-based superconductors. Moreover, they suggest that the
pairing mechanism may be mediated by magnetic fluctuations due to the proximity to a spin density
wave. Knowing the fine details of the Fermi surface topology, its tendency towards instabilities as
well as the strength of the coupling of the quasiparticles to excitations is, therefore, essential for
understanding the superconductivity in these compounds.
To realise the scientific objectives described above, we will both use the existing experimental
set-ups and techniques and develop new ones. We plan to improve the performance of some of the
existing set-ups (better sensitivity, wider range of temperatures/fields, etc). For instance, our set-up for
specific heat measurements by relaxation is currently limited to about 1.5 K. We are going to adopt it
to lower temperatures, 3 He system (about 0.4 K) in the beginning with an ultimate goal of 0.1 K in the
dilution refrigerator. Built on our experience in high pressures, we are going to develop a whole set of
different type pressure cells for transport and specific heat measurements covering a wide range of
pressures, and suitable for high fields and low temperatures. One of the techniques we are going to
develop shortly is absolute measurements of magnetisation with high resolution and sensitivity in
magnetic field gradients, both pulsed and DC. The objective is to develop such measurements up 35
Tesla DC and 70 Tesla pulsed and down to 40 mK.
Cuprates
The cuprates, although known as high Tc superconductors for over 20 years, continue to provide
surprising experimental data, and a complete theory for this phenomenon is still lacking. Recent
advances in crystal growth and improvements in measurement techniques now allow the observation
of quantum oscillations in these systems. We will continue our pioneering studies of the Fermi surface
of these materials through quantum oscillation measurements in order to obtain a more complete
picture of the fermiology of these compounds.
Other techniques, like Nernst effect measurements, ultrasound spectroscopy and pulsed field NMR
will be developed and applied to these systems, in the hope to finally resolve the mystery of high Tc
superconductivity in the cuprates.
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High-field NMR
The most ambitious long term project of the NMR group is to develop high-resolution
(1-0.1 ppm) NMR in resistive magnets at fields ~30 T (1.3 GHz for proton NMR), as an opening to the
communities of solid state chemistry and of materials science. Regarding the solid state (broad-band)
NMR activity, the three main future events are:
i) bringing together at LNCMI-G all the members of the NMR group involved in the DC high-field
NMR. That is, Dr. H. Mayaffre and Dr. M.-H. Julien are about to transfer their activities and
equipments from the Laboratoire de Spectrometrie Physique to LNCMI-G.
ii) the acquisition of the second 15/17 T solid state NMR magnet. Putting in operation the second
high-field superconducting magnet dedicated to NMR will considerably facilitate and increase our
scientific throughput, permitting us to equilibrate the research activities for/with external visitors and
our own in-house research
iii) The development of a NMR spectrometer in pulsed magnetic fields at the LNCMI-T. Although this
instrument will never reach the resolution or sensitivity of the LNCMI-G set ups, it will open the 35-
70 T field range for certain solid state NMR experiments. Similar developments are ongoing in
Dresden and Okayama.
Instrumentation
We continuously improve all the elements of our NMR equipment, that is, spectrometers and probes.
A new generation of custom-built spectrometers and the corresponding software are being developed.
A new generation of NMR probes will be built to allow more excitation power, and to have better
thermal properties (i.e., smaller thermal link to 300 K and less temperature gradient at the sample
space). Narrow bore NMR probes for the resistive magnets and the high-frequency probes will be
equipped by a new type of sample rotator. Our dedicated dilution refrigerator for the 15/17 T magnets
is planned to be equipped with "bottom tuning" circuit, as well as by a piezo driven sample rotator,
enabling rotations in-situ in the mixing chamber. Ultimately, a second dilution refrigerator for the
15/17 T magnets will be built to ensure replacement of the old one and improve its performance. A
special NMR probe will be designed and built for our recently purchased 3 He refrigerator. We are also
developing electronic components for very high frequency range NMR, i.e., above 1 GHz, for proton
NMR above 23.5 T, for which commercial products do not exist. Many of these developments are
directly coupled to the "High-resolution NMR in resistive magnets" project mentioned above, and/or
supported by the EC contract EuroMagNET II, NMR joint research activities. Development of NMR
probes will also be supported within our participation to the SOLeNeMaR, an EC project, lead by
Zagreb University, Croatia.
At LNCMI-T, the development of pulsed field NMR will be pursued, in the context of an ANR project
(2009-2011) after the recent successful proof of principle experiments. This project aims to develop
solid state NMR in the 30-70 Tesla range, but will be limited to systems with fast nuclear spin
dynamics and large concentrations of highly NMR-active nuclei.
Below we detail on some the systems that will be studied in the coming years, but depending on the
demands of our users, others may be added to this list.
Quantum spin systems
i) Recently recorded high field NMR spectra in SrCu2(BO3)2, in the field range 28-34 T,
should ultimately lead to the determination of the spin superstructure of magnetization plateaus. This
applies both to previously identified 1/8 and 1/4 plateaus, as well as to 2/15 and 1/6 plateaus which we
have clearly identified by NMR. Experimental determination of this superstructure is of paramount
importance because our understanding of their stability is far from complete. If available 11 B NMR
spectra are not enough, some further 63,65 Cu NMR spectra might be required to conclude.
ii) In the Han purple compound, the high field 29 Si spectra will be used to determine details of
the "modulated" BEC phase, to verify recent theoretical predictions about very special, novel character
of this phase. Namely, in one type of planes there should be BEC bosons, while in every second
alternating plane some boson density should be induced, but these bosons should not be condensed.
iii) Regarding the investigation of the Luttinger Liquid (LL) behaviour in spin chain systems,
19

a new compound BaCo2V2O8 is thought to cover different regime of LL parameters as compared to
BPCB. We will start the investigation of this system by an NMR study of the (H-T) phase diagram,
and will proceed according to the obtained results.
iv) In the frustrated diamond chain azurite we now focus on the transition from the 1/3 plateau
towards the complete polarization, appearing in the 30-34T field range. According to theoretical
predictions, the system should evolve through an incommensurate phase, and there might be a plateau
at 2/3 of polarization characterized by spontaneous breaking of translational symmetry (unlike the 1/3
plateau). Based on the last proton high-field NMR spectra, we will try to determine the corresponding
experimental spin structure - to be compared to predictions.
Organic conductors
The LNCMI participates in the new ANR project “¾ FILLED”, coordinated by the LPS Orsay
(C. Pasquier), in collaboration with two chemists groups in Rennes (P. Batail) and Angers (M.
Fourmigué) and with the CRPP at Bordeaux (C. Coulomb). The program bears on the study of non
dimerized one-dimensional organic conductors, in which there is a strong competition between 2kF
and 4kF instabilities which can lead to charge disproportionation, and to a very rich phase diagram as a
function of pressure and temperature. As far as 2D organic conductors are concerned, using very high
field resistive magnets we plan to study the possibility of Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)
modulated superconducting phase close to Hc2, in particular in the compound κ-(BEDT)2Cu(SCN)2
which has already been studied at LNCMI by specific heat measurements. The investigations of the
BPCB spin ladder will focus on the quantum critical behaviour near the critical fields Hc1 and Hc2, as
seen by the T1 -1 relaxation rate. The Fermi surface studies of organic conductors by means of quantum
oscillations, and in particular the origin of frequency combinations, will continue.
Metals and superconductors
In this area, our activity will target four kinds of systems:
i) In cobaltates we will focus on the interplay between ionic and electronic textures. This
implies NMR studies of new systems, such as the P3 phase of NaxCoO2 and LixCoO2. One of our
objectives is to unravel the real-space pattern of electronic and/or ionic states, by combining NMR
measurements and ab-initio calculations (and possibly structural studies),
ii) The newly discovered iron pnictide superconductors will be studied with particular
attention to the problems of inhomogeneous electronic states and the phase coexistence between
magnetic and superconducting orders. This research is supported by the ANR project “TETRAFER”
(6-months postdoctoral grant for the NMR group) and by the University J. Fourier of Grenoble (oneyear
postdoctoral grant). It will involve collaboration with the group of J.L. Luo and N.L. Wang from
the Institute of Physics of the Academy of Science in Beijing,
iii) “Hidden” magnetism will be searched for in high temperature (cuprate) superconductors,
especially in ultra-pure YBCO single crystals. Other unsolved questions regarding the presence of
magnetic order and/or nematic (stripe-like) phases in superconducting samples will also be addressed.
iv) In the heavy fermion compound CeCoIn5 we plan to extend our investigation of the FFLO
phase to see if this phase is associated to instability towards a magnetic phase, as in the CeRhIn5
compound of the same family.
All these measurements will particularly require the use of high magnetic fields up to 34
Tesla. A new project on 55 Mn NMR coordination complexes should start in autumn 2009. Our aim is
to resolve the local electronic structure of the transition metal in molecules of chemical and/or
biological interest with our specific low temperature and high/variable magnetic field NMR
techniques. This research is supported by the ANR project “MANGACOM”, in the interdisciplinary
field since it also involves chemical synthesis, EPR measurements and quantum chemical
computation. It is in line with the will of the LNCMI to open the high magnetic field facilities to other
communities, beyond physics-oriented problems.
At this moment, the LNCMI-G is the only laboratory in the world capable of performing
NMR experiments at 40 mK and 30 T which attracts many collaborations from all over the world. In
the future, a lot of effort will be devoted to opening the NMR installation to chemists, providing a
unique tool for high resolution NMR (1 ppm) at 30 T. The strong international reputation of the
LNCMI NMR team is a strong advantage for the realization of the above projects
20

Molecular magnetism
With the recruitment of a Professor in chemistry starting in September 2009 (UJF), ‘Molecular
magnetism’ is now identified as a dedicated theme of the laboratory. During the forthcoming four
years period, the activity on this theme will follow several lines, ranging from chemical synthesis to
physical studies especially with High Field/High Frequency EPR (HFEPR).
Following the important results obtained in enantiomerically pure chiral magnets [Tra08], a first topic
will keep exploring the physical effects related to the simultaneous breaking of space (P) and timereversal
(T) symmetries within the same medium.
Figure 1 : polar paramagnetic heteroleptic tris(bidentate)chrome(III) chiral complexes.
At the molecular level, the coexistence of electric and magnetic dipolar moments within a
chiral molecule can be exploited to probe the Curie-de Gennes conjecture. This conjecture precises
Pasteur's intuition concerning the possibility to obtain an enantiomeric excess (e.e.) from achiral
reactants by applying an external magnetic field: it states that obtaining such an e.e. is indeed possible
by applying simultaneously parallel electric and magnetic fields to the system under reaction in order
to influence the transition energies leading to either enantiomers [Bar94]. In this sense, the
combination of the two external fields acts as a chiral catalyst. We will concentrate on the
interconversion reaction between the two enantiomers of a polar paramagnetic chiral complex. The
synthetic target will be heteroleptic chromium(III) complexes using two different bidentate ligands.
We will focus on the synthesis [Cr(acac)3-x(hfac)x] (acac=acetylacetonate,
hfac=(1,1,1,5,5,5)hexafluoroacetylacetonate; x=1,2) (Figure 1). Given that the effect is expected to be
weak, the interconversion reaction will be studied in collaboration with the Magneto-optic group of G.
Rikken by applying high magnetic field. The experimental demonstration of this effect will
substantiate a possible mechanism to explain the homochirality of life.
In extended structures, the simultaneous breaking of P and T symmetries lead to the formation
of multifunctional magnets that can exhibit, in addition to mere magnetic properties, magnetically
induced Second Harmonic Generation (MFISHG) or ferroelectricity. The latter case corresponds to
multiferroicity, a subject which undergoes an explosive exploration in solid state chemistry [Che07,
Chu08]. In the framework of the Young Researchers ANR program "Ferromol" (leader: C. Train), we
intend to exploit the versatility of molecular chemistry and crystalline engineering to design,
synthesize and assemble polar and paramagnetic building blocks in order to obtain and study
molecular multiferroics. The measurement of ferroelectrical properties will be done in collaboration
with B. Dkhil in Ecole Centrale Paris (Chatenay-Malabry). The interplay between magnetism and
ferroelectricity will be explored by Piezoelectric Force Microscopy in Barthelemy's group at Thales
(Palaiseau) and by measuring the influence of the electric field on the magnetisation by micro-SQUID
at Institut Néel (Grenoble). In parallel with the synthesis of bulk materials, we intend to process them
in nanoporous alumina (M. Woytasik, Institut d'Electronique Fondamentale, Orsay) in order to favour
their integration in devices.
The second topic is the development of coordination chemistry of verdazyl radical [Tra09] in
the framework of the Young Reseachers ANR program "fdp magnets" (leader: V. Robert, Lyon). One
of the synthetic targets will be one dimensional compounds where verdazyl radicals bridge anisotropic
metal ions. The goal is to combine strong single-ion anisotropy with reinforced exchange interaction
21

in order to obtain Single Chains Magnets (SCM) with high blocking temperatures. These systems
indeed appear as an appealing alternative to Single Molecules Magnets (SMM). To reach our synthetic
target, we will exploit the versatility of the verdazyl chemistry in order to favour bidentate bridging
mode. Systematic theoretical studies will be performed in Lyon while slow relaxation dynamics and
the microscopic parameters triggering the effect will be measured in Grenoble.
Figure 2: Nickel(II) inserted in a calix-6-arene as a BPT coordination mode [Sen04]
The third topic is somehow related to the second one. When metal ions with strong single-ion
anisotropy are spoken of, everyone immediately thinks of cobalt(II) or lanthanide(III) cations.
Nevertheless, in a recent paper [Reb08], it has been proposed that nickel(II) in BiPyramidal Triangular
(BPT) coordination could exhibit D values of -100 cm -1 . This perspective is very appealing for topics
related to slow relaxation of magnetisation. Though it is known, this coordination mode is rather
scarce. To test the above hypothesis by magnetometry and high field EPR, we will rely on a
mononuclear complex of nickel(II) where the metal ion is coordinated by three nitrogen atoms of a
modified calix-6-arene and two different solvent molecules leading to the expected BPT coordination
mode (Fig. 2) [Sen04]. Nevertheless, this complex is not well adapted for the synthesis of polymetallic
complexes or coordination polymers as those leading to SMM and SCM behaviour. An important
effort of ligands design and synthesis will be undertaken in order to obtain BPT coordination mode
and bridging ability.
More generally the understanding of magnetic anisotropy, leading to its control and tuning, is
now a crucial step for the study and elaboration of mononuclear complexes as well as for that of SMM
[Gre09]. For SMM the understanding of the factors governing the anisotropy, which is responsible for
the existence of the energy barrier and the dominant factor of the tunnelling, is of primary importance.
To obtain magnetostructural correlations for the magnetic anisotropy, systematic HF-EPR studies on
series of complexes from mononuclear to polynuclear entities will be performed. Part of this work will
be performed in the frame of the ANR project ‘TEMAMA’ (coordinator: Dr N. Guihéry, Toulouse)
dealing mostly with consistent series of Ni(II) complexes and relying on the combination of the
experimental determination of the magnetic anisotropy and their theoretical characterization. These
series will involve an increasing number of metal ions while keeping the same surrounding ligands
responsible for the anisotropy of the single ion. Such systems can be seen as building blocks of
SMMs. The underlying challenge of such a systematic construction of architectures of higher
nuclearity is the rational improvement of their intrinsic features (a larger resulting anisotropy and/or a
larger spin and a higher blocking temperature). Similarly, the theoretical progression performed by the
theoretical groups involved (N. Guihéry, Toulouse, and H. Bolvin, Strasbourg) will start from the
“exact” Hamiltonian which allows analysis and identifications of the key structural and electronic
factors and then will proceed through simplifying modelizations and controlled approximations for the
largest systems.
Another line of study will emerge with the development of a pulsed HF-EPR spectrometer
which is now in its final stage of construction. Fundamentally, the pulsed operation at 283 GHz will
allow measuring dynamical properties of paramagnetic species. These dynamical studies will focus on
two kinds of objects. An important goal deals with the determination of the relaxation times of Single-
22

Molecule Magnets. Recent measurements on this matter have been obtained on two SMM [Sch08,
Tak09], showing the accessibility of the information within the timescales of pulsed operation for HF-
EPR. Following our studies of the magnetic anisotropy on most of the synthesized derivatives of Fe4
SMM, a systematic study of their relaxation times will be performed, with the main idea of
understanding the dominant factors governing the relaxation and the coherence time in these
complexes.
Pulsed EPR spectroscopy associated to double site-directed spin labelling (SDSL) is now a
well established research area and allows measurements up to several nanometres in biomolecules,
opening up the possibility of global structural mapping via SDSL. In the case of DNA and RNA, wellestablished
techniques exist for the labelling with nitroxide radicals, and from the radical study
structural and dynamic information are obtained. In collaboration with Dr. S. Gambarelli (CEA
Grenoble) pulsed EPR studies about the conformational changes resulting of DNA-damages [Sic09],
which can be induced by many genotoxic agents, will be performed on synthetic DNA strands marked
by double SDSL. Such studies could also be applied to other systems, such as vesicles or membranes.
References
[Bar94] L. D. Barron, Science 266, 1491 (1994).
[Che07] S.W. Cheong, M. Mostovoy, Nature Mater. 6, 13 (2007).
[Chu08] Y. H. Chu et al., Nature Mater. 7, 478 (2008).
[Gre09] L. Gregoli et al., Chem. Eur. J. 15, 6456 (2009).
[Reb08] J.-N. Rebilly et al., Chem. Eur. J. 14, 1169 (2008).
[Rik00] G. L. J. A. Rikken, E. Raupach, Nature 405, 932 (2000).
[Sch08] C. Schlegel et al., Phys. Rev. Lett. 101, 147203 (2008).
[Sen04] O. Sénèque et al., Eur. J. Inorg. Chem. 1817 (2004)
[Sic09] G. Siccoli et al., Nucleic Acid Res. 37, 3165 (2009).
[Tak09] S. Takahashi et al., Phys. Rev. Lett. 102, 087603 (2009).
[Tra08] C. Train et al., Nature Mater., 7, 729 (2008).
[Tra09] C. Train, et al., Coord. Chem. Rev. (2009), doi: 10.1016/j.ccr.2008.10.004
23

Optics, X ray and neutron scattering
Birefringence magnétique du vide (BMV)
The LNCMI-T has been engaged since 2001 in a very ambitious experiment to observe the magnetic
birefringence of the quantum vacuum (birefringence magnétique du vide, BMV), an effect predicted in
1935 by Heisenberg and Euler, but never observed so far. The experimental setup has recently reached
a phase where magnetic birefringence of dilute helium gas could be determined with precision, using
pulsed magnetic fields. For the near future, this setup will be further improved, gaining several orders
of magnitude in sensitivity. Major improvements will realize this, such as an upgrade of the
mechanical rotation and tip tilt of polarizers and of the cavity mirrors, the upgrade of the cavity finesse
and its mechanical isolation. Starting from 2011, the BMV experiment will enter in a new phase. The
development and test phase will be completed and an improved apparatus has to be designed to
eventually reach the final goal, the observation of the magnetic birefringence of the quantum vacuum.
A new coil has already been designed for this next phase and tested. It has generated 31.7 T at the
centre and a B²L of about 300 T²m. The goal is to put two of these coils on the experiment, which will
provide sufficient sensitivity to observe the predicted BMV. A new bank of capacitors to supply the
energy for such coils is needed, and is foreseen in the context of the upgrade of the LNCMI-T, in the
form of 6 MJ rapid modules. Once all that in place and properly tested, a long period of data
acquisition will start. A crucial point that has to be studied is if the current room will be able to host
the next generation of set up. A new room can be planned in the context of the extension of the
LNCMI-T building that is also part of the CPER Midi Pyrenees 2007-2013 upgrade project.
To optimally accompany this evolution, Carlo RIZZO, full professor at the University of Toulouse,
and originator of the BMV project, will join the LNCMI starting January 2011. Human and financial
support is also needed to accompany such an experimental effort. We plan to apply to the ERC to
demand such support. The BMV experiment on Cotton-Mouton effect opens a new research line at the
LNCMI. The group has shown that it is now possible to envisage a more general theme: the electromagneto
optics of dilute matter. We are therefore studying the feasibility of measurements of inverse
Cotton-Mouton effects in gases and in vacuum, electro-magnetic Jones birefringence in gases, both
standard and chiral. We plan to adapt the present set up of the BMV experiment to this new line of
research.
X ray and neutron scattering
The use of magnetic fields on X ray or neutron beam lines to study magneto-structural or magnetic
effects is quite common, but so far the field strengths were limited by superconducting magnets to
around 15 T, although a clear scientific case exists to go to much higher fields. A large number of
phenomena has been observed in fields above 15 T, the understanding of which would greatly benefit
from the powerful characterisation possibilities offered by neutron and X ray scattering.
A project is under study to create a static field installation between ILL and ESRF, capable of
generating fields in excess of 30 T to make such fields available for x ray and neutron scattering
experiments. If realized, this project will be completed around 2015. In the mean time, LNCMI-T has
developed a portable pulsed field installation that is actually in use to do such experiments up to 30 T
with pulsed magnetic fields. In collaboration with ILL and ESRF, this installation will be further
improved (see Technical perspectives), new samples environments will be developed in terms of
temperature, pressure and manipulation capabilities, and it will be used for experiments on systems
like quantum magnets, multiferroics, high Tc superconductors etc. This will be done in collaboration
between LNCMI and ILL/ESRF scientists, and qualified external users will also be granted access
through the EuroMagNET Transnational acces procedure.
24

Auto-analysis
Strong points
The scientific production of the LNCMI, or rather of its two precursors, the LCMI and the LNCMI
over the last fours years totals up to 650 publications (ACL + ACT), of which of 65 in high impact
journals like Physical Review Letters, and 10 in the highest impact journals like Nature and Science.
In view of the small scientific staff (in total 18 full time equivalent scientists), this is an excellent
productivity both quantitatively and qualitatively. The reasons behind this success are the quality of
the technical installations and the scientists of the LNCMI and its strong international orientation and
diversity, which attract many high level external users.
Weak points
Several senior members have left the LNCMI over recent years, and several more will leave in the
coming years, mostly because of retirement. Insufficient new positions were given by the CNRS and
associated universities to compensate this loss. Within the French system, the small number of staff
implies limited political influence on the attribution of positions, for which criteria like productivity or
excellence are not decisive.
The low number of teaching scientists is related to the fact that it is considered to be difficult to
combine teaching obligations with working in a user facility. The geographical separation between the
LNCMI installations and the university complexes, in particular in Grenoble, aggravates this problem.
As a consequence, the LNCMI is not very well known amongst the local students, and only a small
fraction of them chooses the LNCMI to do a PhD.
The installations of the LNCMI, both of its Grenoble and of its Toulouse site have not had a major
upgrade since the early 1990’s, and are rapidly loosing competitiveness with respect to the much better
funded, and therefore better equipped, international competition. The absence of a structural
investment scheme for TGE in France makes it difficult to find the necessary investments to improve
this situation.
Opportunities
The use of high magnetic fields for research purposes is worldwide strongly increasing, as witnessed
by the ongoing large investments in high field facilities in the USA, China, Japan, Germany and the
Netherlands, and by projects to bring high magnetic field infrastructures to other large facilities, like
synchrotrons (ESRF, APS, Spring-8) and neutron sources.(HZB, ILL, ISIS, SNS). Another important
development is the coupling of high magnetic field to large THz sources. THz radiation is a powerful
probe of magnetically induced states by cyclotron resonance and electron spin resonance. With this in
mind, the HLD has been constructed next to a THz free electron laser (ELBE), and the NHMFL and
the HFML will both have their dedicated free electron lasers, the former being still in the planning
stage, the latter being already in the construction phase.
In view of its long standing experience and very good reputation, the LNCMI has a high potential to
play an important role in these developments and to see the size and scope of its user community
increase. Realizing this potential will however require investments and additional manpower, which
are seriously lacking, and above all, a consistent long term view of the development of the French
TGIR.
Risks
The current LNCMI installations, both in Grenoble and Toulouse are essentially 20 years old, and
have not had any major upgrades during this period. The rapid developments in high field technology
make that the LNCMI will increasingly loose its international competitiveness and that it will be
abandoned by its external users, French and other, in favor of the international competition that can
offer better specifications and support. Several major projects to improve this situation have been
launched, (hybrid project LNCMI-G, upgrade LNCMI-T) but these are still lacking a solid financial
basis.
25

AERES report on
the unit:
Section des unités de recherche
Laboratoire National des Champs Magnétiques
Intenses (LNCMI) – UPR 3228
under the supervisory authority of the
following institutions and bodies:
CNRS
INSA
University Paul Sabatier – Toulouse
University Joseph Fourier – Grenoble
Mars 2010

Unit
Name of the unit : Laboratoire National des Champs Magnétiques Intenses
Requested label : UPR
No. in case of renewal : 3228
Unit director : Mr Gerardus RIKKEN
Members of the expert committee
Chairperson :
Mr Jean-Yves MARZIN, LPN, CNRS, Marcoussis
Reviewers :
Mr Jean-Paul AMOUREUX, Université des Sciences et Technologies de Lille
Mr Marc BIRD, National High Magnetic Field Laboratory, Tallahassee, USA
Mr Jérôme LESUEUR, CNRS, Ecole Supérieure de Physique et Chimie Industrielles de la ville de Paris
Mr Noboru MIURA, National Institute for Materials Science, Tsukuba, Japan
Mr Eric PALM, National High Magnetic Field Laboratory, Tallahassee, USA
Reviewer(s) nominated by the staff evaluation committees (CNU, CoNRS,
CSS INSERM …) :
Mr Guy LE LAY, CNU
Mrs Olena POPOVA, CoNRS
Representatives present during the visit
Scientific delegate representing AERES :
Mr Claude LECOMTE
Research organizationn representatives :
Mr Charles SIMON, CNRS, Institut de Physique
Invited representatives :
Mrs Pascale BUKHARI DR11/CNRS, Grenoble
Mr Laurent DAUDEVILLE, Université Joseph Fourier, Grenoble 1
Mr Raoul FRANCOIS, INSA, Université Toulouse 3
Mr Alain MILON, Université Paul Sabatier, Toulouse 3
2

Report
1 � Introduction
� Date and conduct of the visit :
The evaluation relies upon the documents provided and a visit at the Grenoble site of LNCMI which took place
on March 8 and 9 2010. The first day was devoted to a general description of LNCMI by the direction, a virtual visit of
Toulouse facilities and a real one of those of Grenoble, a discussion with LNCMI operators, with personals, and to
seven scientific presentations of the activities. In the second day, five other presentations focused on scientific and
technical aspects and the future plans were outlined by the laboratory director.
The prepared material and organization of the visit itself were of high quality thanks to the LNCMI direction as
well as all contributors from Toulouse and Grenoble.
� History and geographical location of the unit and brief description of its
field of study and activities :
LNCMI results from the merger, in January 2009, of the Grenoble High Magnetic Field Laboratory (LCMI) and the
Toulouse National Pulsed Magnetic Fields Laboratory (LNCMP). The unit, implanted thus on both sites, is at the same
time a national and international facility and a research laboratory. Operated by CNRS, it is associated to the INSA
and University Paul Sabatier of Toulouse and to the University Joseph Fourier of Grenoble. It is active, through in
house research and hosted projects, in all fields of science requiring high magnetic fields, as well as in related
technical developments.
� Management Team :
The unit director is Mr G. Rikken, with two deputy directors: Mr C. Berthier and Mr O. Portugall.
3

� Staff: (according to the dossier submitted to AERES) :
In the
project
N1: Number of professors (see Form 2.1 of the unit’s dossier) 11
N2: Number of EPST, (Public scientific and technological
institution) or EPIC, (Public industrial and commercial institution)
researchers (see Form 2.3 of the unit's dossier)
N3: Number of other professors and researchers (see Form 2.2
and 2.4 of the unit’s dossier)
N4: Number of engineers, technicians and tenured administrative
staff members (see Form 2.5 of the unit’s dossier)
N5: Number of engineers, technicians and non-tenured
administrative staff members (see Form 2.6 of the unit’s dossier)
N6: Number of doctoral students (see Form 2.8 of the unit’s
report dossier and 2.7 of the unit’s project dossier)
N7: Number of persons accredited to supervise research and
similar
2 � Assessment of the unit
� Overall opinion :
The high magnetic field laboratories in Toulouse and Grenoble both have long tradition and history since 1960’s
or early 1970’s, and have made steady progress for many years. Both institutions have been well known as
representative high field facilities of France, for pulsed and steady fields, respectively. Recently, the visibility of the
two laboratories has become very prominent, and especially after their merger in 2009 as LNCMI. This tendency was
accelerated by many excellent achievements which have been made by inhouse staff and outside users, from both
France and abroad, in diverse fields of science. The high quality of the research accomplishments is confirmed by the
number of outstanding papers in journals with high impact factors. This fact demonstrates that the facility (the
largest in Europe) is now being matured as a real national and international centre of the high magnetic field
research. As outlined by the LNCMI direction, the laboratory (and Europe in this field) is nevertheless at a crossroads,
where the choice is either to invest and grow, to remain competitive with similar centers in the US, Japan and China,
or accept to rely upon the access to these facilities.
� Strengths and opportunities :
The most important factor as a national research center is to provide unique and user-friendly facilities for the
community. At the same time, the activity of the inhouse staff is also essentially important, since for the joint use of
the facilities, the cooperation with the staff is essential. In these respects, the strength and opportunities of LNCMI
are considered to be in quite a high level: the facilities of high field generators can produce world-top class magnetic
fields both in steady and pulsed forms, they seem to be reasonably user-friendly, and the scientific level and skills of
the inhouse staff are also very high.
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Another big advantage of LNCMI is the vicinity, in Grenoble, of ILL and ESRF where strong beams of neutrons
and synchrotron radiations are exploited. This proximity to ESRF and ILL, a strong materials development program and
a larger dc power supply than labs in Nijmegen and Hefei will be critical advantages over the next few decades. When
complete, the 42.5 T hybrid magnet will be the highest dc field in Europe and might rival the one in Tallahassee.
There are also many other laboratories in France where the scientists need high magnetic fields. Collaboration with
these institutions and researchers, as well as those in other nearby countries in Europe, the LNCMI would be able to
produce many excellent results in future as long as the technology is regularly updated in due time. The hiring of new
researchers in the chemistry or biology should further enlarge the community of users.
The set up of EHMFL, which is now included in the ESFRI roadmap, is a key point for the future of LNCMI, if it
could secure the necessary funding for upgrades and developments.
� Weaknesses and threats :
The main problem of the LNCMI is that some of the equipments including the field generators are becoming
rather old since they were built. On the meanwhile, the other European facility in Nijmegen and Dresden are either
new or much younger. Whereas three quarters of the projects led in European facilities are hosted in LNCMI, the lack
of support is a real threat. For example, the capacitor bank of 14 MJ in Toulouse is now 15 years old, and the
protection chambers for the pulse magnets which were built when the laboratory started do not look sufficiently
robust for routinely generating higher fields safely at present. Renewal of some facilities would certainly be
necessary.
Another point is the relatively low number of tenured researchers and professors attached to LNCMI, as
compared to similar facilities. Although CNRS and universities consider as a priority to maintain the personnel at the
present level, LNCMI did not yet recover the staff number it had when LCMI was associated with Max Planck.
A third weak point (linked to the previous one) is that there seem to be not so many students in the two
laboratories at Grenoble and Toulouse. Though the number relative to that of tenured researchers is reasonable, the
absolute number is low. It would be desirable to increase the number, especially in such excellent and unique
facilities with many constituents, for further increasing the activity of the laboratories and to foster young scientists
in the research field in the next generation.
The main threat is a possible lack of competitiveness in the future, if necessary investments in human and
financial resources are not made in time.
� Recommendations for the unit director :
It is a very good point that the amalgamation of the two high magnetic field facilities in France has so far been
very successful to enhance the activity of the entire LNCMI. It is now a good opportunity to implement various new
projects based on the excellent achievements so far acquired. The proposed plan looks very appropriate, though the
committee recommends setting up priorities among the planned projects. Needless to say, the safety is the most
important issue for such laboratories as high field facilities: the programs related to the safety guard (e.g. fail-safe
site in Toulouse) should be given the first preference, as well as the completion of the hybrid project, which is clearly
a very high priority.
As far as the advertising on the lab activity is concerned, it would be useful, to fix a scientific reference frame
(common to Grenoble and Toulouse) and stick to it, accelerate the effectiveness of the Toulouse/Grenoble merger by
defining common scientific and technical projects, and identify more clearly the inhouse and outside driven research.
On the medium term, the implication of LNCMI in ESRF and ILL high field projects and set-up of EMFL are
strategic issues which need to be clarified and prioritized.
� Data on work produced :
5

A1: Number of produisants (professors and researchers whose
names appear in a minimum number of “publications” over a 4-
year period) listed in N1 and N2 in the project column
A2: Number of produisants among the other staff listed in N3, N4
and N5 in the project column
A3: Proportion of produisants in the unit [A1/(N1+N2)] 100%
Number of theses for accreditation to supervise research defended 3
Number of theses defended 15
Any other data relevant for the field (please specify)
3 � Detailed assessments
� Assessment of work produced and scientific quality :
- Relevance and originality of the research conducted, quality and
impact of the results :
The research conducted in LNCMI reflects in a large part the research conducted by the community of
researchers using high magnetic fields: it is thus diverse and ranges from solid state physics to the experiments to
evidence the magneto birefringence of vacuum. It would thus be somewhat unfair to evaluate it as if disconnected
from its community of users. This being said, the quality of this research is indeed excellent, with several important
breakthroughs in the 2005-2008 period.
It is also worth noting that: (i) the LNCMI, as a facility, is also evaluated on a yearly basis by an international
scientific committee which shares the present committee opinion on the scientific quality, (ii) that all the research
projects held have to go through a program committee (common to the 3 European facilities through the European
network EuroMagNETII ) to get magnet time. Often, these projects are jointly set up by in house researchers and
external users, the whole procedure ensuring an optimal use of the facility.
- Quantity and quality of publications, papers, theses and other
work :
The number of publications is of the order of 130 per year, among which about one fifth in letters, and 40
contributions to international conferences with proceedings + 20 invited talks in international events. These figures,
much higher than in “normal” solid state physics laboratory and the journals where the results are published attest
both the quality of the research held at LNCMI and the impact it has as a facility. 15 PhD theses were defended from
2005 to 2008. The visibility of LNCMI researchers is globally very good, with a high number of invited talks in
conferences.
- Quality and solidity of contractual relations over time :
LNCMI has a long tradition in supporting external research teams (national or not) needing access to high
magnetic fields. The laboratory staff is involved in preparing the projects to be submitted to the programm
committee, thus increasing the success rate (some 85 %). As far as the relationship with partner organizations is
concerned, the associated universities did and do support LNCMI, which proves a long term fruitful partnership.
26
6

- Ability to recruit top-level researchers, post-doctoral and other
students, especially foreigners :
LNCMI was well supported in the recent years and can benefit from the hiring of very good researchers. It
suffers nevertheless from the low number of students in physics for attracting PhD students. This is made worse by the
low number of faculties; mainly in Grenoble (being researcher, professor and local point contact does not provide an
easy life). Other French laboratories, which have been taking benefit from the facility should be strongly encouraged
(by the program committee) to share PhD students with LNCMI, in order to ensure a sufficient breeding ground for
future recruitments.
- Ability to obtain external financing, to respond to or launch calls
for tenders and to participate in the activities of competitiveness
clusters :
The LNCMI has been and is very active in European projects as well as for national calls of the ANR. The ANR
funding (500 k€/year) is at an excellent level, which will be difficult to increase further.
- Participation in international or national programs, existence of
important collaborations with foreign laboratories :
Several international conferences were organized or co-organized by LNCMI in the report period. The
international collaborations are obviously at a high level (80% of the projects come from abroad).
- Valuation of research and socio-economic or cultural relations :
One patent was issued in 2007: this number is rather low, if one refers to the number of technical staff and to
the field covered (this may be due to the specificity of the technical innovations).
� Assessment of the strategy, governance and life of the unit :
- Relevance of the unit's organization, quality of its governance
and internal and external communication :
The LNCMI, despite its peculiar configuration, is running smoothly, and the personals appreciate the way it is
governed. Although they have the difficult task to do their own research and serve as local point contacts, and for
some of them teach also, the LNCMI researchers are dynamic and productive. A special mention should be given to the
PhD students (half of them from abroad) who are enthusiastic about their work and conditions.
It should also be noted that the direction makes a large effort to increase the opportunity for the staff and
workers in both sites of Grenoble and Toulouse to meet each other in order to enhance the good cooperation and
communication. Actually, it should be very important to speed up the lab consolidation.
Despite the complicated institutional and international landscape, the LNCMI direction has succeeded in
building a very positive atmosphere inside the lab.
� Project assessment :
- Existence, relevance and feasibility of a medium- or long-term
scientific project :
The projects of LNCMI on the medium term are both in the scientific domain as well as for magnet technology.
On the first one, the committee approves the will to enlarge the community of users, beyond its traditional solid-state
basis, in the fields of chemistry, fundamental and plasma physics, and to magneto-science. The LNCMI indeed
prepares already adequately this broadening by having attracted in-house researchers who will accompany this
growth.
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Concerning the magnet developments, the projects are considered as positive by the committee, both for
pulsed and DC fields. In particular, the choice of 1 and 6 MJ banks for pulsed fields are adequate in the context of
portability and user-oriented policy, as well as the future projects of hybrid 35T/12 MW and high Tc superconductors
based magnets for the DC fields. Given the cost of developing new high field installation, one has also to pay attention
to the proper development of state to the art instrumentation, and even new ones like NMR, RPE, US, thermoelectric
probes, etc. The recent outstanding results in cuprates for instance, are directly related to the gain in signal/noise
ratio in the measurements. It is important to keep investing in instrumentation on both sites.
- Originality and risk-taking :
The past and future scientific projects (which are again also those of the community, and selected by an
international committee to check their relevance) are indeed original and for some of them risky (e.g. vacuum
birefrigence).
On the technical side, the LNCMI is developing an original hybrid magnet system that has high visibility (and
high cost). Risks are being managed well. The lab is playing a leading role in the new field of combining pulsed
magnets with x-ray scattering and in trying to install dc magnets at both x-ray and neutrons sources: this is a clear
originality with respect to similar facilities.
4 � Team-by-team and/or project-by-project analysis
4 � 1 Metals and Superconductors
- 5 chargés de Recherche CNRS
- 2 maîtres de Conférences
The physics of metals and superconductors is studied on both sites through transport and spectroscopic
measurements. The most important subjects of interest for the scientific community nowadays are addressed that is:
strongly correlated systems, heavy fermions and organic materials. The overall quality is very good, with some
exceptional contributions for example in the physics of cuprates in Toulouse or the study of the superconductingferromagnet
URhGe in Grenoble, and some very detailed work on the fermiology of organic conductors for instance.
The magnetic field is a powerful tool to probe new and exotic electronic states in matter, providing an appropriate
instrumentation is used. Such an effort has been made on both sites, where accurate measurements of
magnetoresistance, Shubnikov de Haas (SdH), de Haas van Alphen (dHvA), Nernst, ultra-sound, NMR... in very high
field and often very low temperatures can be made. This appears to be decisive to compete at the top international
level.
Through very efficient collaborations worldwide, this activity generated high level scientific contributions,
published in high impact factor journals (3 Nature, 2 Science, 27 PRL).
The most striking results are related to superconductivity. For the first time, the topology of the Fermi surface
of cuprates has been determined by quantum oscillations measurements (SdH, dHvA) for different doping levels in the
phase diagram, and electron pockets have been surprisingly discovered in these hole doped materials. A Fermi surface
reconstruction therefore must occur, whose nature is under strong debate in the community. This LNCMI work is a real
breakthrough in the field. Another surprising and important result is the discovery of a ferromagnet at 9.5 K being a
superconductor at 250 mK, namely the heavy fermion compound URhGe. Moreover, a field induced superconducting
pocket has been found related to a quantum critical point. A detailed magnetic phase diagram has been made, where
the orientation of the field with respect to the crystallographic axis plays a major role. Another field induced
superconducting state has been observed in an organic conductor -(BETS)2FeCl4. The competition between
superconductivity and magnetism is also addressed in the heavy fermion compounds and the organic conductor, where
hints of the FFLO* state have been observed by NMR in CeCoIn5 and magnetometry and torque measurements in -
(BEDT-TTF)2Cu(NCS)2.
Other interesting results on the properties of exotic electronic phases has been obtained thanks to high
magnetic fields, like the “hidden order” in heavy fermions like URu2Si2, the Luttinger physics in the organic
CuBr4(C5H12N)2, or the determination of the Fermi surface in the two band superconductor ZrB12 for example.
8

Beyond metals, the physics of quantum spin systems studied by NMR at LNCMI has a major impact in the
community. In antiferromagnetic Heisenberg systems of coupled ½ spin dimers, quantum transitions occur under
strong magnetic fields, where the Dzyaloshinsky-Moriya interaction has been found to play a key role, like in the
ladder system Cu2(C5H12N2)2Cl4. The possible Bose-Einstein Condensation of triplets on the background of the
commensurate spin superlattice has been explored in SrCu2(BO3)2 and in BaCuSi2O6.
The above mentioned activities have their own strong dynamics, and there is no doubt that they will be fruitful
in the future. They have to be strongly supported. The NMR group will be reinforced by two permanent researchers,
which is a very good perspective.
4 � 2 Nano & Meso
- 3 professeurs
- 2 directeurs de recherche
- 4 chargés de recherche
- 1 maître de Conférences
The scientific contributions in this area is based, on the one hand on semiconductor physics, comprising low
dimensional structures: basically, two-dimensional electron gas (2DEG), quantum wells and quantum dots, and, on the
other hand, on the study of graphite, graphene and carbon nanotubes.
10 researchers (2 DR + 2 CR + 1 Pr from Grenoble and 2 PR + IR +1 CR+ 1 MCF from Toulouse, as of 01/01/2010)
work in this area together with 6 students (on a total of 13), i.e., a large proportion.
The production is largely superior to the usual standards in this field and of high quality. Just for year 2009, it
includes 14 in-house projects (11 on graphene, one on graphite, 3 on semiconductors) on a total of 39, 53 articles,
among which 13 are related to carbon allotropes (comprising 4 Phys. Rev. Lett. : 2 on graphite, 1 on graphene, 1 on
polymer-embedded single-walled carbon nanotubes).
Typically, the last theme of carbon-based nanostructures regroups in a very fruitful synergetic collaboration
researchers from both previous laboratories, i.e., the LCMI in Grenoble and the LNCMP in Toulouse. Samples are
prepared in house and studied in static and pulsed fields both in Grenoble and Toulouse.
Some highlights concern the study of the Aharonov-Bohm effect in ballistic multi-wall carbon nanotubes, the
Landau level spectroscopy of in graphene-based structures.
Other highlights in semiconductor physics concern :
- The study of electron-electron interactions; e.g., in strongly interacting 2D electron
systems, the Stoner transition which drives a 2DEG into a ferromagnetic state; their
role affecting electronic transport in a 2DEG via plasmon excitations; their role in
determining the spin and charge state of optically probed single quantum dots.
- The “ratchet effect”: anisotropic transport induced by microwave excitations in a
2DEG with intentional anisotropic disorder.
- The study of magnetic semiconductors.
The points to develop concern the relationship with the Universities, the Polytechnic Institute.
4 � 3 Magnetic Resonance
- 1 professeur,
- 2 directeurs de recherche
- 1 chargé de recherche
- 2 ingénieurs de recherche
9

The scientific contributions in this area are mainly in solid-state Physics (broad-band NMR) at very large
variable magnetic fields (up to 34 T) and low temperature (a few tens of mK). They are also based on high-resolution
NMR for material science at room temperature and 30 T; however, this is a starting new project.
Five permanent positions of researchers, three postdocs and two students work in this area. This is a small
group, which nevertheless attracts several (6) regular visitors.
The production is very good and quite superior to usual standards.
The themes which have been developed for solid-state Physics concern: (1) High T C superconductors Cobaltates
and Pnictides; (2) Exotic superconductivity: FFLO phase in CeCoIn 5 and Jaccarino-Peter mechanism in λ-(BETS) 2FeCl 4;
(3) Quantum anti-ferro-magnets: (i) Luttinger-liquid behavior in the spin ladder CuBr 4(C 5H 12N) 2, (ii) Wigner
crystallization of bosons: magnetization plateaus in SrCu 2(BO 3) 2, (iii) Bose-Einstein Condensation of triplets/bosons in
Han purple BaCuSi 2O 6.
The second topic, which concerns ‘classical’ NMR, has only started very recently by analyzing at 30 T, on a
static ZrF 4 powder sample, the 91 Zr spectrum.
Concerning the projects, which concern solid-state Physics, there are related to :
- Quantum spins: Ising chain of BaCo2V2O8, NiCl2·4SC(NH2)2 compound (DTN), High-field
phase transition in Volborthite.
- High Tc's, cobaltates and pnictides.
- Field-induced super-conductivity.
However, the main new project of this group concerns the application of very high-field NMR to ‘classical’
NMR. This project should be encouraged. Indeed, there is another TGE (based on the Federation 3050), which is
devoted to ‘classical’ NMR. At least ¾ of its proposals are based on quadrupolar low-gamma nuclei, which can only be
recorded with very large field NMR spectrometers. The two largest fields presently available for this purpose are 21.1
T (Lille) and 20 T (Orléans). Indeed, the 23.5 T magnet of Lyon is reserved for biology, which means 1 H/ 13 C/ 15 N nuclei,
all spin-1/2 nuclei. Even at 21.1 T, the 1D spectra of low-gamma nuclei remain very broad with all resonances
overlapping. For such broad spectra, the resolution of c.a. 1 ppm accessible at Grenoble is quite sufficient. The
resolution of such nuclei is proportional to the square of the magnetic field, and thus spectra recorded at 30 T are
2.25 more resolved than those recorded at 20 T.
It should thus be fine for the two TGEs (LCMI, Lille and Orléans) to work together on such project of lowgamma
quadrupolar nuclei. This new topic would create links between LNCMI and the large community of people
working in the field of material science. In order to do so, it means for LCMI to develop double-resonance ( 1 H- 19 F/X
low-gamma) MAS probes, with the shortest as possible dead-time. There are several very recent ‘tricks’ that can be
used to improve such a development. This can thus be done in collaboration with the two groups (Lille and Orléans) of
‘classical’ NMR.
4 � 4 Molecular Magnetism
- 1 professeur
- 1 directeur de recherche
- 1 ingénieur de recherche
Besides a nice NMR experiment on CsFe8, which displays a field-induced phase transition, most of the research
on molecular magnetism is made within the High-Field RPE group. The recent arrival of a chemist researcher will
boost that already well known activity on molecular magnet and will be the opportunity to develop a new activity on
new materials presenting ferroelectric or even multiferroic properties.
The main results to date refer to S>1 systems, where the multifrequency operation mode of the HF-RPE system
is particularly suitable. For example, double Ni(II), Mn(II) or Fe(III) complexes have been studied, and their molecular
configuration explored, and compared with models. These results are important in order to be able to build new
molecular magnets. Biological systems have been also investigated, namely proteins with Fe-4S tetrahedras. The
structure of Single Molecular Magnets which present quantum properties at low temperature has been studied.
10

In the future, study of P and T violation in chiral molecule will be studied, in collaboration with the magnetooptic
group, which is a very appealing perspective. Complex materials like ferroelectrics and multiferroics will be also
investigated. Single-chain Magnets may be an alternative to single molecule one, with higher blocking temperature.
An important research program is proposed in that perspective based on verdazyl chemistry.
The development of a pulsed HF-EPR spectrometer up to almost 300 GHz will allows dynamical studies of these
compounds like the magnetic relaxation for instance.
Whereas the spectroscopic group “RPE & NMR” is on the same site, the committee wonders whether this is just
a cosmetic label “spectroscopy”, or if one can imagine interactions? This should be possible on molecular magnetism
for instance ... The committee does not see clear projects in that direction.
4 � 5 Magneto-Optics, Neutrons and X-Rays
- 1 professeur
- 1 directeur de recherche
- 1 chargé de recherche
- 1 maître de conférences
Another highlight is the magneto-spectroscopy of carbon nano-tubes and graphene. In carbon nano-tubes, a
remarkable achievement is that the evidence of Aharonov-Bohm effect was observed in both optical and transport
experiments in pulsed high magnetic fields. In graphene, magneto-optical transitions between Landau levels were
observed, and most of the peculiar Landau level structures arising from the mass-less Dirac carriers were clarified. At
present, the subject has become very popular and many experiments are going on competitively. At LNCMI, these
results have been obtained from a rather early stage, so that LNCMI has been playing a leading role in this research
field, and has given a large impact.
One of the great advantages of the LNCMI is that the Grenoble lab. is located very close to the neutron
scattering facilities of ILL and the synchrotron radiation facilities of ESRF. Both machines provide extremely powerful
techniques for condensed matter sciences. Neutron scattering is particularly useful for magnetism, and the
synchrotron radiation is very useful as an intense radiation in the X-ray range. The combination of high magnetic fields
with these facilities would open up many new possibilities, such as the investigation of magnetic phase transitions or
exploration of new magnetic and crystal structures, magneto-optical processes, etc. The effort of the LNCMI towards
this direction is highly evaluated. Various special types of magnets have been developed. Both for steady fields and
pulsed fields, coils with a conical access or split coils were designed and are being developed. For pulsed fields, a 1
MJ portable capacitor bank was built to install in the vicinity of the beam lines.
In collaboration with the group of Tohoku University, Japan, magnetic structures of the plateau phases
were investigated in CdCr 2O 4 and TbB 4. The lattice deformation with temperature and magnetic fields was measured
in NdFeAsO using the beam at ESRF. These nice results obtained in these experiments demonstrated a promising
future, and hence the demand of high magnetic fields for these beam experiments will increase significantly from now
on.
4 � 6 Magnets / Instrumentation
Pulsed-field
- 6 ingénieurs de recherche
� Assessment of work produced and scientific quality :
On the basis of the long-standing tradition of the pulsed magnet technology in Toulouse and the European
“ARMS” project in which the Toulouse laboratory was intensively involved, high field pulse magnets have been
successfully built. The magnet construction was made basically following the fibre reinforcement technique which has
now become one of the standard techniques for the pulsed magnets, and wet winding method. Furthermore, the team
leader introduced his technique developed at Amsterdam. The quality of these magnets is quite good in the sense that
they are reliable and have reasonably long life.
11

A unique point of the LNCMI magnet technology group is that they are developing strong wires by themselves in
the lab. It would be marvellous if these wires become really available for practical use, but it would take some more
time to solve all the technically difficult problems which still exist. With the recent merger of the Toulouse and
Grenoble labs, this expertise is now being applied to development of materials suitable for high-field dc magnets as
well, which is a good point.
Also, the polyhelix magnet technology that was developed in Grenoble for dc mangets is being transferred to
the Toulouse facility for application in pulsed magnets. This shows potential for reducing the cool-down time of the
pulsed magnets which should allow the lab to combine long pulses with short cool-down times, a formidable
combination which could propel the lab to the international forefront of the pulsed magnet community. The scientific
productivity of the pulsed-field facility is already competing with much larger labs worldwide, including Los Alamos.
Such a development might allow Toulouse to be recognized as the international leader in this field.
Concerning the power supply, the plan to build a new 6 MJ bank is a sensible decision, because it would be
very useful for generating most of the necessary pulsed fields by itself, and also it can be used for generating really
very high fields with a two-coil structure, by combining with the 14 MJ bank. The committee also places a high value
on their good success in building a 1 MJ portable capacitor bank for X-rays and neutron experiments, since nice results
have been obtained with it.
Another notable recent progress is seen in the single turn coil system. The entire system was moved from
Berlin to Toulouse, and it is now in operation. The technique is very useful as very high pulsed fields well above 100 T
(up to 300 T) can be generated rather easily without spending so much energy in the capacitor bank. Although it is a
destructive method (“semi-destructive” in the sense that the samples are not destroyed), and pulse duration is very
short, we can perform a lot of interesting experiments can be performed as demonstrated in Tokyo and Berlin. The
system will provide useful means for obtaining high fields and will become one of the attractive facilities of LNCMI for
users.
- Quantity and quality of publications, papers, theses and other
work :
Besides the publication on the science in high fields, reasonable amount of the pulsed magnetic field
technology of Toulouse has also been published and well accepted internationally.
� Assessment of the influence, appeal and integration of the team or the
project in its environment :
- Number and reputation of the prizes and distinctions awarded to
the unit members, including invitations to international events :
Several series of international conferences are held periodically on high magnetic fields and related science,
and LNCMI always plays principal roles including invited talks. It also has hosted some of these conferences.
- Ability to recruit top-level researchers, post-doctoral and other
students, especially foreigners :
Considering the attractive research environment and very high reputation at present, it will not be so difficult
to obtain very good researchers, post-docs, or students, if there are available positions created in LNCMI with
reasonable salaries.
� Assessment of the strategy, governance and life of the team or project :
Some staffs in the lab are professors of universities and there are students in their groups. However, the
number of students is relatively small.
DC fields
12

� Assessment of work produced and scientific quality :
The largest project presently underway in magnet technology is the development of a 42.5 T hybrid magnet.
This is a very ambitious and original activity. There have been only 15 hybrid magnets built worldwide. This compares
with thousands each of NMR, MRI and accelerator magnets. The project includes collaboration with a highly respected
magnet development group at CEA. The lab has taken a conservative approach in the design of the superconducting
outsert by avoiding a high-field, small-bore Nb 3Sn approach and building a relatively low-field, large-bore NbTi
magnet. The conductor design for the outsert shows a good balance of relying on proven concepts (Rutherford cable
w/ additional stabilizer, superfluid helium, ventilated windings) while still incorporating new features to optimize the
conductor for this application. This magnet shows great promise of being successful and, when successful, will be the
highest field dc magnet in Europe. There is also some possibility of upgrading the resistive insert to allow the system
to rival the 45 T system in the USA (Tallahassee).
The dc resistive magnets in Grenoble have for many years attained lower fields than those at other labs
worldwide, but recently a series of upgrades have been successfully completed, with more expected soon. Grenoble
now has the highest dc fields in Europe and is starting to challenge those provided in Tallahassee. This is a most
welcome development; the new director is to be praised for it. The LNCMI is starting to organize collaborations in
Grenoble and elsewhere in France focused on high-temperature (or high-field) superconductors. The US is well
organized in this regard, with the Applied Superconductivity Center in Tallahassee playing a lead role. It is
commendable that the Grenoble is trying to organize the development of these materials that show so much promise
for the future.
- Quantity and quality of publications, papers, theses and other
work :
The LNCMI publishes extensively on pulsed magnet technology and materials development. The hybrid project
is a large construction project, where one wants to minimize risk, hence it relies more on proven technology and little
of the work is publishable in the scientific literature. The new conductor technology has been presented at the recent
21 st International Conference on Magnet Technology in Hefei, China where it was well-received. They have started to
publish in their new initiative in high-field superconductors.
- Quality and solidity of contractual relations over time :
The LNCMI did enter into an inappropriate contract with Oxford Instruments many years ago, however it was a
guaranteed-performance contract and when OI failed to deliver, the money was returned. It appears that presently
the labs contractual relations are robust.
- Ability to recruit top-level researchers, post-doctoral and other
students, especially foreigners :
The magnet technology group in Grenoble recently recruited a researcher from CERN to play a leading role in
the design and construction of the new hybrid magnet. This new staff has a strong track record spanning more than 10
years in superconducting magnet system development. He is a most welcome addition to the team and should be able
to play a leading role in magnet development in both Grenoble and Toulouse as senior colleagues retire.
- Ability to obtain external financing, to respond to or launch calls
for tenders and to participate in the activities of competitiveness
clusters :
LNCMI has been quite successful in securing additional funds for the hybrid magnet project and shows great
potential for securing funding for other new initiatives, particularly the development of magnets for neutron and x-ray
scattering.
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- Participation in international or national programs, existence of
important collaborations with foreign teams :
LNCMI is leading the EuroMagNET II, collaboration between the European high-field facilities in Nijmegen,
Dresden, Grenoble and Toulose. This collaboration shows potential to allow the European labs to jointly rival the US
lab. The lab also is developing collaborations with ILL & ESRF, both of which are international labs. This collaboration
also shows great potential to lead transformational science. The Toulouse branch of the lab has a long-standing
collaboration with Oxford University on development of high-strength, high-conductivity materials for use in pulsed
magnets. At the national level, LNCMI has a major collaboration with CEA on the development of the hybrid outsert
for Grenoble. The new initiative in high-field superconductors is an international collaboration that shows great
potential.
- Relevance of its organization, quality of its governance and
internal and external communication :
The magnet development activities in Grenoble have been recently re-organized with the arrival of the new
director. Since then, external communications have improved with more visibility at international conferences. The
lab is communicating very well with its immediate neighbors developing collaborations in superconductivity as well as
high-field magnets for x-ray and neutron scattering.
- Relevance of initiatives aimed at scientific coordination and the
emergence and taking of risks :
The new initiatives with ILL & ESRF are focused on an emerging set of possibilities and that various
organizations and nations (Japan, US, Germany) have been pursuing. LNCMI is one of the leaders in this field and
shows great potential for the future, given the success to date w/ pulsed field at ESRF and the proximity of the
Grenoble branch to ESRF & ILL. The collaboration w/ CEA on the hybrid project should greatly reduce the risk
associated with the development of a hybrid magnet. The collaboration with Nijmegen and Dresden is a much-needed
step to allow the European labs to compete with the American one. The collaboration on high-field superconductors is
much needed to pull together the European efforts. These materials show great potential not only for higher-field,
more economical magnets, but also in revolutionizing power transmission and production, which is an increasingly
important issue in coming years.
- Involvement of the members in teaching activities and in
organising research in the region :
The magnet development team is very active in organizing research combining high fields with neutrons and xrays
and research in high-field superconductors in the city of Grenoble. The Toulouse and Grenoble branches of the
lab are now leading the research at high fields in southern France.
� Project assessment :
Existence, relevance and feasibility of a medium- or long-term scientific project:
The hybrid magnet project will take a few years to complete (2013) and will result in the highest field dc
magnet in Europe, possibly rivalling the 45 T system in the US (Tallahassee). This magnet seems feasible as it uses a
relatively low-risk technology (NbTi 8.5 T, large bore outset).
Existence and relevance of a resource allocation policy: The lab has been successful in undertaking a hybrid
project along with resistive magnet upgrades, design of split magnets for neutron and x-ray scattering and continuing
to push the limits of pulsed-field facilities with a relatively small staff and budget. It seems that resources are being
allocated very well.
To conclude on this part, the Toulouse and Grenoble magnet labs have been very prominent in the
international magnet development communities for decades. In recent years both labs have taken on major new
initiatives that show great promise of coming to successful fruition. The future looks very promising!
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