Development of heat capacity measurement system under high pressure

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

doi:10.1143/JJAP.46.3090

Development of heat capacity measurement system under high pressure

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

SCI - Physics

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	3090-3095
Number of pages	6
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	46
Issue number	5 A
DOIs	https://doi.org/10.1143/JJAP.46.3090
Publication status	Published - 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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10.1143/JJAP.46.3090

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title = "Development of heat capacity measurement system under high pressure",

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.",

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AU - Tomioka, Fumiaki

AU - Umehara, Izuru

AU - Ono, Takashi

AU - Hedo, Masato

AU - Uwatoko, Yoshiya

AU - Kimura, Noriaki

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AB - 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.

KW - Adiabatic method

KW - CeRhSi

KW - Heavy fermion system

KW - High pressure

KW - Specific heat

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Development of heat capacity measurement system under high pressure

Abstract

Keywords

ASJC Scopus subject areas

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