Report No 1951/AP - Instytut Fizyki JÄdrowej PAN

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INDIRECT NUCLEAR INTERACTIONS IN MPtSn SEMICONDUCTORS (M=Ti, Zr, Hf, Th) : 119Sn AND 195Pt MAS NMR STUDY Agnieszka Grykałowska and Bogdan <strong>No</strong>wak W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2, Poland The semi-Heusler-type compounds MPtSn (M=Ti,Zr,Hf,Th) crystallize in the cubic MgAgAs-type of structure. This structure may be considered as zinc-blende crystal structure of tin and platinum atoms in which the M atoms occupy the octahedral interstitial sites. Thus each Sn and M atom is tetrahedrally coordinated by Pt atoms, whereas each Pt atom is doubly tetrahedrally coordinated by Sn and M atoms. The tetrahedral geometry implies that the bonding is primarily covalent with sp 3 bonds. Thus the family of MPtSn compounds appears to be an appropriate system to search for electron-coupled interactions. In favorable cases (TiPtSn and ZrPtSn) the 119 Sn and 195 Pt MAS NMR spectra reveal expected J coupling patterns originating from indirect spin coupling between Pt and Sn nuclei. 119 Sn MAS NMR spectrum of TiPtSn at 111.9 MHz (7.05 T) and T=294 K. J iso (Sn-Pt) = 1920 Hz. Spinning rate 8 kHz, accumulation number 2056. 1670 1620 (ppm ) 1570 195 Pt MAS NMR spectra of ZrPtSn at 64.4 MHz (7.05 T) and T=294K. J iso (Pt-Sn) = 1550 Hz. Spinning rate 6.5 kHz, accumulation number16384. 3450 3400 (p p m ) 3350 32
NMR OF HIGH-TEMPERATURE SUPERCONDUCTORS AND IN PULSED HIGH FIELD MAGNETS Jűrgen Haase Leibnitz-Institut für Festkörper- und Werkstofforschung, Dresden NMR was one of the most important spectroscopic methods to prove classical superconductivity (BCS theory). It is therefore expected that NMR also holds important clues about the electronic structure of the new, high-temperature superconductors. Important findings from about 15 years of NMR research on high temperature superconductors will be summarized and new NMR evidence will be presented that shows the special physical properties of these materials that still await a satisfying theoretical description. <strong>No</strong>t only the NMR of superconductors may benefit from very high magnetic fields, and the first results will be reported of carrying NMR in pulsed high field magnets, that allow for magnetic field strengths of 60 T currently, and of up to 100 T in not too distant future. 33
Page 1 and 2: The Henryk Niewodniczański INSTITU
Page 3 and 4: CONTENTS: DTI STUDY OF PATIENTS WIT
Page 5 and 6: DESIGN PRINCIPLES OF THE GRAPHICAL
Page 7 and 8: DO ZPV CORRECTIONS TO NMR SHIELDING
Page 9 and 10: FMRI IN ESTIMATION OF INFLUENCE OF
Page 11 and 12: DTI STUDY OF PATIENTS WITH SPONDYLO
Page 13 and 14: ONE-BOND CARBON-CARBON COUPLING CON
Page 15 and 16: NMR-BASED METHOD FOR THE LOCATION O
Page 17 and 18: T 1 AND T 1ρ PROTON RELAXATION TIM
Page 19 and 20: MAGNETIC ROTATIONAL RESONANCE AND C
Page 21 and 22: INTERACTION OF THE CAMPTOTHECIN FAM
Page 23 and 24: ARTIFACTS PRODUCED BY DENTAL MATERI
Page 25 and 26: “THROUGH SPACE” J-COUPLINGS OF
Page 27 and 28: DETERMINATION OF THE AMPLITUDE OF S
Page 29 and 30: NMR DIFFUSION STUDIES USING ULTRAHI
Page 31: NMR FINGERPRINT OF 2,5-DIHYDROXYPHE
Page 35 and 36: EFFECT OF ANTIBIOTICS ON FORMING OF
Page 37 and 38: A SPECIALIZED PROBEHEAD FOR MR IMAG
Page 39 and 40: The free activation enthalpy ∆G
Page 41 and 42: motions of NH 3 in phases III and I
Page 43 and 44: at 200 K. Slow exchange limit is no
Page 45 and 46: APLICATION OF NMR SPECTROSCOPY FOR
Page 47 and 48: MOBILITY OF CD 4 MOLECULES IN NANOS
Page 49 and 50: NMR STUDY ON DIASTEREOMERIC DERIVAT
Page 51 and 52: 1 H NMR STUDIES OF POLY(ε-CAPROLAC
Page 53 and 54: Table 1. Phospholipids’ concentra
Page 55 and 56: BINARY MIXTURE OF HARD SPHERES AS A
Page 57 and 58: NMR STUDY OF Nd 2 Fe 14 BD x HYDRID
Page 59 and 60: The coefficient of dynamic viscosit
Page 61 and 62: FUNCTIONAL MAGNETIC RESONANCE IMAGI
Page 63 and 64: MOLECULAR MOTION IN ETHYLENE/NORBOR
Page 65 and 66: TAUTOMERISM AND HYDROGEN BONDING OF
Page 67 and 68: For the three 1 H nuclei in the met
Page 69 and 70: UNIQUE INFORMATION ABOUT MOLECULAR
Page 71 and 72: NMR STUDY OF CMR EFFECT IN MANGANIT
Page 73 and 74: NON-MARKOVIAN PROCESSES OF MOLECULA
Page 75 and 76: ELECTRIC FIELD GRADIENTS IN MB 12 (
Page 77 and 78: 1 H- 13 C AND 1 H- 15 N NMR STUDIES
Page 79 and 80: 13 C CP-MAS NMR STUDIES OF MIANSERI
Page 81 and 82: NMR STUDY OF GdFe 2 H x HYDRIDES Vi
Page 83 and 84:
THEORY OF DAMPED QUANTUM ROTATION I
Page 85 and 86:
APPLICATION OF MOLECULAR MODELING A
Page 87 and 88:
NMR STUDY OF ULTRAFINE POLYTETRAFLU
Page 89 and 90:
1 H NMR DETECTION OF σ-ADDUCTS IN
Page 91 and 92:
[4] M. Tanasiewicz, W.P. Węglarz,
Page 93 and 94:
1 H MAS AND 13 C CP/MAS NMR STUDIES
Page 95 and 96:
ESTIMATION OF SPEECH REGIONS IN BIL
Page 97 and 98:
NEURAL CORRELATES OF WORKING MEMORY
Page 99 and 100:
APPLICATION OF 13 C-NMR TO THE STUD
Page 101 and 102:
DIAGNOSTIC IMPORTANCE OF MAGNETIZAT
Page 103 and 104:
13 C CP MAS STUDIES OF BAICALEIN AN
Page 105 and 106:
ORDERING EFFECTS IN COMPUTER-SIMULA
Page 107 and 108:
mainly phosphocholine and phosphoet
Page 109 and 110:
References: 1. Kasyan L.I. Tarabara
Page 111 and 112:
of Mo (Re) ions, which in turn is p
Page 113 and 114:
THREE-DIMENSIONAL STRUCTURE AND BAC
Page 115 and 116:
MRI STUDIES OF TABLETS Monika Zieli
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Report No 1951/AP - Instytut Fizyki JÄ drowej PAN

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