AC-Calorimetry at High Pressure and Low Temperature

Wilhelm, H.

doi:10.1007/978-3-540-44838-9_63

Cited by 19 publications

(15 citation statements)

References 20 publications

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“…11,12) Here, P 0 is an average of the power transmitted from the heater to the sample. κ is the thermal conductivity between the sample and the environment.…”

Section: Methodsmentioning

confidence: 99%

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

et al. 2006

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We measured the heat capacity of the pressure-induced superconductor CeNiGe3 by the ac calorimetry under high pressure up to 2.4 GPa using a single crystal sample grown by the Bi-flux method. The heat capacity Cac shows the λ-type anomaly at Néel temperature TN. The pressure dependence of TN is consistent with those determined previous studies by the resistivity measurement under high pressure. At 2.1 and 2.4 GPa, the heat capacity anomaly was observed around 0.3 K. This temperature is close to the superconducting transition temperature Tsc determined by the previous resistivity measurement. Therefore, the heat capacity anomaly may be due to the superconducting transition. The value of Tsc by the present heat capacity measurement was larger than those by the resistivity measurement. This might reflect a sample dependence.

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“…11,12) Here, P 0 is an average of the power transmitted from the heater to the sample. κ is the thermal conductivity between the sample and the environment.…”

Section: Methodsmentioning

confidence: 99%

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

et al. 2006

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“…A similar effect was also reported in ac-calorimetric experiments where liquid helium was used as pressure transmitting medium. 11 In Fig. 3, the ac-heat capacities are plotted at three different pressures.…”

Section: A Ac-calorimetrymentioning

confidence: 99%

Multiprobe experiments under high pressure: Resistivity, magnetic susceptibility, heat capacity, and thermopower measurements around 5 GPa

Jaccard

Sengupta

2010

Review of Scientific Instruments

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We have performed multiprobe experiments using a Bridgman-anvil pressure cell, adapted to trap Daphne oil as pressure medium. Resistivity, ac-magnetic susceptibility, thermopower, and ac-heat capacity of a type-I superconductor, lead, have been studied at low temperature up to 5 Ϯ 0.1 GPa. This is the first report where ac-magnetic susceptibility has been measured in this type of pressure cell and at such a high pressure range. The signature of the superconducting transition temperature, obtained from all these different measurements, agrees well within the experimental errors.

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“…Because the thermal conductivity of the diamond power is reported to be in the similar order with that of Cu thin wire with a diameter of about 0.1 mm, 27 it may be a suitable medium for attaining thermal equilibrium inside the pressure cell. 26͒ as pressure medium.…”

Section: Experimental Details and Proceduresmentioning

confidence: 99%

Construction of a low-temperature thermodynamic measurement system for single crystal of molecular compounds under pressures

Kubota

Nakazawa

2008

Review of Scientific Instruments

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An apparatus to obtain low-temperature thermodynamic information under high pressures for a tiny single crystal of molecular compounds was developed based on the ac technique. To detect small temperature oscillation of a sample inside the cramp-type pressure cell, we have used a small ruthenium oxide chip sensor as a thermometer. The adoption of the four-terminal method by the ac resistance bridge has made high-resolution detection of thermal anomaly possible in the low-temperature region. The constructed high-pressure thermodynamic system was mounted on a 3He refrigerator and we have succeeded to detect the thermal anomaly in relevant to magnetic order of single crystal sample of Mn4-cluster complex up to 1.05 GPa. A distinct peak of the heat capacity and its upward shift with increasing pressures was observed using a tiny crystal of about 100 microg. The high-pressure behavior of the discontinuity of heat capacity at the superconductive transition of 6 mg of metal indium has also been detected by this apparatus. The details and performance of the technique are reported.

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AC-Calorimetry at High Pressure and Low Temperature

Cited by 19 publications

References 20 publications

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

Multiprobe experiments under high pressure: Resistivity, magnetic susceptibility, heat capacity, and thermopower measurements around 5 GPa

Construction of a low-temperature thermodynamic measurement system for single crystal of molecular compounds under pressures

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AC-Calorimetry at High Pressure and Low Temperature

Cited by 19 publications

References 20 publications

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe3by ac Calorimetry

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe3by ac Calorimetry

Multiprobe experiments under high pressure: Resistivity, magnetic susceptibility, heat capacity, and thermopower measurements around 5 GPa

Construction of a low-temperature thermodynamic measurement system for single crystal of molecular compounds under pressures

Contact Info

Product

Resources

About

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry

Thermodynamics Investigation on Pressure-induced Superconductor CeNiGe₃by ac Calorimetry