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Umeo K. Alternating current calorimeter for specific heat capacity measurements at temperatures below 10 K and pressures up to 10 GPa. Rev Sci Instrum. 2016;87(6):063901doi: 10.1063/1.4952959.
Umeo, K. (2016). Alternating current calorimeter for specific heat capacity measurements at temperatures below 10 K and pressures up to 10 GPa. The Review of scientific instruments, 87(6), 063901. https://doi.org/10.1063/1.4952959
Umeo, Kazunori. "Alternating current calorimeter for specific heat capacity measurements at temperatures below 10 K and pressures up to 10 GPa." The Review of scientific instruments vol. 87,6 (2016): 063901. doi: https://doi.org/10.1063/1.4952959
Umeo K. Alternating current calorimeter for specific heat capacity measurements at temperatures below 10 K and pressures up to 10 GPa. Rev Sci Instrum. 2016 Jun;87(6):063901. doi: 10.1063/1.4952959. PMID: 27370464.
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Rev Sci Instrum. 2016 Jun;87(6):063901. doi: 10.1063/1.4952959.

Alternating current calorimeter for specific heat capacity measurements at temperatures below 10 K and pressures up to 10 GPa.

The Review of scientific instruments

Kazunori Umeo

Affiliations

  1. Cryogenics and Instrumental Analysis Division, N-BARD, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan.

PMID: 27370464 DOI: 10.1063/1.4952959

Abstract

A developed alternating current calorimeter for measuring the absolute value of specific heat C of a very small sample under a pressure up to 10 GPa and low temperature below 10 K is described. A Bridgman anvil cell made of tungsten carbide with a top diameter of 3 mm is used. A hollow at the top prevents expansion of the sample space over the anvil top. Two chip resistors, which act as a thermometer and a heater, are mounted on the outer part of a copper-beryllium gasket with a frying pan-like shape. Thus, the thermometer is not pressurized. In order to isolate the gasket from the anvil thermally, diamond powder with a grain size of 0.25 μm is placed on the anvil top. Two jumps of C at the superconducting transitions of Pb (3.3 mg) and In (5.0 mg) are observed under various pressures up to 9 GPa, as clearly as those at the ambient pressure.

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