Abstracts Book - IMRC 2018

• SF1-P003
MAGNETIC MEASUREMENTS AND LOW TEMPERATURE SPECIFIC
HEAT OF INTERMETALLIC HoCuBi
Cintli Aguilar 1 , Roberto Escudero 1
1 Instituto de Investigaciones en Materiales, Materia Condensada y Criogenia, Mexico.
Among intermetallic alloys, compounds having within their chemical
composition rare earth elements are a big family that has been studied due to
its extensive range of physical properties, especially its magnetic properties
because rare earth elements have f electrons in their electronic configuration.
RTX intermetallics, where R-rare earth, T -transition metal and X- p-block
element, have been studied since more than 30 years and has been found to
have different crystalline structures. Depending on the crystalline structure that
each composite has, it will be the electrical or magnetic property that is found,
such as Kondo effect, unconventional superconductivity, heavy fermion
behavior, metamagnetism, spin glass behavior, magnetoresistance,
magnetocaloric effect, among others. Some of these RTX intermetallics may
show one or inclusive more than one of the properties above mentioned.
Particularly, this work has been focused on the study of the family of RCuBi
intermetallics, in this work an alloy is formed where holmium is the Rare-Earth
element. In literature, few members of such family have been found like: YbCuBi
and EuCuBi. From structural characterization, it has been found that HoCuBi
intermetallic alloy has a monoclinic crystalline structure. Magnetic
measurements show a metamagnetic behavior (spincrossover) at low
temperature (1.7 K) as the temperature goes up it is no longer possible to
observe that behavior (about 5 K). The magnetic behavior of this holmium
intermetallic alloy as well as for other compounds of the same family is
antiferromagnetic and specifically for this intermetallic alloy, Neel temperature
is about 7K. Measurements of the specific heat in the temperature range 2 to 50
K indicates a high Sommerfeld constant γ= 1.04 J/mol K 2 , a Debye temperature
Θ D = 137.18 K, and an anomaly on the specific heat capacity is shown. A
comparison of the specific heat as a function of temperature in different fixed
magnetic field has been carried out showing a diminish on the specific heat
anomaly.