高圧力の科学と技術
Online ISSN : 1348-1940
Print ISSN : 0917-639X
ISSN-L : 0917-639X
特集:複合極限環境下における精密物性測定
高圧力・極低温下における交流法による比熱の絶対値測定
梅尾 和則
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ジャーナル フリー

2015 年 25 巻 4 号 p. 283-291

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We developed the AC-calorimeter for measuring the absolute value of specific heat up to 10 GPa. We used Bridgman anvil cell made of WC with the top of 3 mm in diameter. A hollow at the top prevents expansion of the sample space over the anvil top. As for the thermometer and the heater, two chip resistors were mounted on the fringe of the Cu-Be gasket in the shape of a frying pan. Thereby, the thermometer is free from pressure. In order to thermally isolate the gasket from the anvil, diamond powder of 0.25 μm was laid on the anvil top. Two jumps of specific heat at the superconducting transitions of Pb (3.3 mg) and In (5.0 mg) are observed under pressures up to 9 GPa as clearly as at ambient pressure.

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© 2015 日本高圧力学会
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