High-resolution Calorimetry in Pulsed Magnetic Fields

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 $\kappa$-(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.

17 pages, 7 figures

References in corpus (5)

• High magnetic fields for fundamental physics
• Planes, Chains, and Orbits: Quantum Oscillations and High Magnetic Field Heat Capacity in Underdoped YBCO
• Generation of flat-top pulsed magnetic fields with feedback control approach
• Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor UTe${}_2$
• Mass enhancement in multiple bands approaching optimal doping in a high-temperature superconductor

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• Novel quantum phase of the chromium spinel oxide HgCr${}_2$O${}_4$ in high magnetic fields
• Unveiling the double-peak structure of quantum oscillations in the specific heat
• Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields
• Search for magnetoacoustic quantum oscillations in the insulating phase of YbB${}_{12}$