Development of heat capacity measurement system under high pressure

Fumiaki Tomioka, Izuru Umehara, Takashi Ono, Masato Hedo, Yoshiya Uwatoko, Noriaki Kimura

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We have developed a miniature piston-cylinder pressure-cell for the measurement of specific heat by adiabatic method. It produces pressures up to 1.5 GPa and could be used in the temperature range 0.7-5 K. The pressure-cell is designed to be employed with a commercial Superconducting Quantum Interference Device (SQUID) magnetometer in order to enable to determine the exact value of applied pressure. We carried out calibration by measuring the pressure dependence of the mixture of the Fluorinert 70 and 77 which is a transmitting medium for the pressure-cell. We have also developed an automated sampling method for the specific heat measurement. To demonstrate the performance of the present measurement system, we have performed the specific heat measurements for CeRhSi3 up to 1.2 GPa. The results obtained have enough quality to discuss pressure dependence of the magnetic entropy and the magnetic phase transition.

Original languageEnglish
Pages (from-to)3090-3095
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number5 A
DOIs
Publication statusPublished - 2007 May 8

Keywords

  • Adiabatic method
  • CeRhSi
  • Heavy fermion system
  • High pressure
  • Specific heat

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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