Pressure dependence of thermal conductivity and specific heat in CeRh2Si2 measured by an extended thermal relaxation method

We have developed a new technique for measuring thermal conductivity and specific heat under pressure by improving a thermal relaxation method. In this technique, a cylindrical sample with a small disc heater is embedded in the pressure-transmitting medium, then temperature variations of the sample...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 536; pp. 335 - 337
Main Authors Nishigori, Shijo, Seida, Osamu
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2018
Subjects
CeRh2Si2
Pressure
Specific heat
Thermal conductivity
Thermal relaxation method
Thermal relaxation method
Specific heat
CeRh2Si2
Thermal conductivity
Pressure
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Summary:We have developed a new technique for measuring thermal conductivity and specific heat under pressure by improving a thermal relaxation method. In this technique, a cylindrical sample with a small disc heater is embedded in the pressure-transmitting medium, then temperature variations of the sample and heater were directly measured by thermocouples during a heating and cooling process. Thermal conductivity and specific heat are estimated by comparing the experimental data with temperature variations simulated by a finite element method. The obtained thermal conductivity and specific heat of the test sample CeRh2Si2 exhibit a small enhancement and a clear peak arising from antiferromagnetic transition, respectively. The observation of these typical behaviors for magnetic compounds indicate that the technique is valid for the study on thermal properties under pressure.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2017.09.031