High-resolution calorimetry in pulsed magnetic fields.

Rev Sci Instrum

Institute for Solid State Physics, The University of Tokyo, Kashiwa 277-8581, Japan.

Published: April 2021

We have developed a new calorimeter for measuring the thermodynamic properties in pulsed magnetic fields. Instrumental design is described along with the instrument construction details, including the sensitivity of a RuO thermometer. Operation of the calorimeter is demonstrated by measuring the heat capacity of three samples: pure germanium, CeCuGe, and κ-(BEDT-TTF)Cu[N(CN)]Br, in pulsed fields up to 43.5 T. Obtaining field stability is key in measuring high-resolution heat capacity under pulsed fields. We also examine the performance of the calorimeter by employing two measurement techniques: the quasi-adiabatic and dual-slope techniques. We demonstrate that the calorimeter developed in this study is capable of performing high-resolution calorimetry in pulsed magnetic fields, which opens the door to new opportunities for high-field thermodynamic studies.

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Source
http://dx.doi.org/10.1063/5.0040655DOI Listing

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