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arXiv · 2012.02411

High-resolution Calorimetry in Pulsed Magnetic Fields

Shusaku Imajo·Chao Dong·Akira Matsuo·Koichi Kindo·Yoshimitsu Kohama
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Abstract

We have developed a new calorimeter for measuring thermodynamic properties in pulsed magnetic fields. An instrumental design is described along with the construction details including the sensitivity of a RuO2 thermometer. The operation of the calorimeter is demonstrated by measuring heat capacity of three samples, pure Germanium, CeCu2Ge2, and $κ$-(BEDT-TTF)2Cu[N(CN)2]Br, in pulsed fields up to 43.5 T. We have found that realization of field-stability is a key for measuring high-resolution heat capacity under pulsed fields. We have also tested the performance of the calorimeter by employing two measurement techniques; the quasi-adiabatic and dual-slope methods. We demonstrate that the calorimeter developed in this study is capable of performing high-resolution calorimetry in pulsed magnetic fields, which opens new opportunities for high-field thermodynamic studies.

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Shusaku Imajo, Chao Dong, Akira Matsuo, Koichi Kindo, Yoshimitsu Kohama. 2020-12-04. High-resolution Calorimetry in Pulsed Magnetic Fields. https://doi.org/10.1063/5.0040655

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