Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields

Tetsuya Nomoto; Chengchao Zhong; Hiroshi Kageyama; Yoko Suzuki; Marcelo Jaime; Yoshiaki Hashimoto; Shingo Katsumoto; Naofumi Matsuyama; Chao Dong; Akira Matsuo; Koichi Kindo; Koichi Izawa; Yoshimitsu Kohama

doi:10.1063/5.0143875

Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields

Rev Sci Instrum. 2023 May 1;94(5):054901. doi: 10.1063/5.0143875.

Affiliations

¹ Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
² Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
³ MPA MAGLAB, Los Alamos National Laboratoy, Los Alamos, New Mexico 87545, USA.
⁴ Division of Material Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.

PMID: 37125859
DOI: 10.1063/5.0143875

Abstract

We report an experimental setup for simultaneously measuring specific heat and thermal conductivity in feedback-controlled pulsed magnetic fields of 50 ms duration at cryogenic temperatures. A stabilized magnetic field pulse obtained by the feedback control, which dramatically improves the thermal stability of the setup and sample, is used in combination with the flash method to obtain absolute values of thermal properties up to 37.2 T in the 22-16 K temperature range. We describe the experimental setup and demonstrate the performance of the present method with measurements on single-crystal samples of the geometrically frustrated quantum spin-dimer system SrCu2(BO3)2. Our proof-of-principle results show excellent agreement with data taken using a standard steady-state method, confirming the validity and convenience of the present approach.