Design of micro pressure cell for measurements of specific heat and magnetization

Tomioka, Fumiaki; Tsuboi, Akiyuki; Ono, Takashi; Hedo, Masato; Uwatoko, Yoshiya

doi:10.1016/j.jmmm.2003.12.1017

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…Considering such findings based on high pressure studies, crucial to the development of new theories, we have undertaken the development of specific heat measurement system under high pressure by means of a semi-adiabatic method. 2,3) It is well-known that the relaxation, ac calorimetric and adiabatic methods are the typical techniques to measure the specific heat. It is, however, very difficult to determine the absolute value of specific heat by the ac caloric method.…”

Section: Introductionmentioning

confidence: 99%

Development of Heat Capacity Measurement System under High Pressure

Tomioka

Ono

Hedo

et al. 2007

jjap

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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 CeRhSi 3 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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Section: Introductionmentioning

confidence: 99%

Development of Heat Capacity Measurement System under High Pressure

Tomioka

Ono

Hedo

et al. 2007

jjap

Self Cite

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“…A series of short version of piston-cylinder cells were reported by Umehara et al 19 in 2004 and Uwatoko et al 20 in 2005 ( Fig. 6).…”

Section: Cylinder Type High Pressure Cells For Mpms Squid Magnetometermentioning

confidence: 86%

Review of modern instrumentation for magnetic measurements at high pressure and low temperature

Wang

Kamenev

2014

Low Temperature Physics

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High-pressure magnetic susceptibility experiments can provide insights into the changes in magnetic behavior and electric properties which can accompany extreme compressions of material. Instrumentation plays an important role in the experimental work in this field since 1990s. Here we present a comprehensive review of the high-pressure instrumentation development for magnetic measurement from the engineering perspective in the last 20 years. Suitable nonmagnetic materials for high pressure cell are introduced initially. Then we focus on the existing cells developed for magnetic property measurement system (MPMS®) SQUID magnetometer from Quantum Design (USA). Two categories of high pressure cells for this system are discussed in detail respectively. Some high pressure cells with built-in magnetic measurement system are also reviewed.

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“…We have measured the temperature dependence of electrical resistivity by standard four prove method. The magnetization was measured from 2 to 300 K by a SQUID magnetometer (Quantum Design, MPMS) with homemade micro high-pressure cell [14]. Considering the magnetic behavior in this compound is extremely sensitive to the size of the magnetic-field step H and/or the sweeping rate of magnetic field, it is worth noting the conditions of magnetization processes in our measurements were as follows.…”

Section: Methodsmentioning

confidence: 99%