Resistivity and AC-calorimetric measurements of the superconducting transition in CeCu2Si2 under very high hydrostatic pressure in a helium-filled diamond anvil cell

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Resistivity and AC-calorimetric measurements of the superconducting transition in CeCu2Si2 under very high hydrostatic pressure in a helium-filled diamond anvil cell. / Holmes, Alexander; Jaccard, D.; Demuer, A.

In: Acta Physica Polonica B, Vol. 34, No. 2, 02.2003, p. 567-570.

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@article{618fa63d715441bba05b9bd631703201,
title = "Resistivity and AC-calorimetric measurements of the superconducting transition in CeCu2Si2 under very high hydrostatic pressure in a helium-filled diamond anvil cell",
abstract = "In the ideal pressure conditions of a helium-filled diamond anvil cell, we have been able to probe the resistivity and, for the first time, the specific heat of the heavy fermion superconductor CeCu2Si2 at pressures over 6 GPa, down to temperatures below 100 mK, and in a magnetic field up to 8 T. We clearly observed the superconducting jump using the AC calorimetry technique, which provides a semi-quantitative measure of the sample specific heat. The evolution of the superconducting transition with pressure was observed quasi-simultaneously in a single sample in both the resistivity and heat capacity. The jump in C-p hints at changes in the coupling regime. When T-c is a rapidly varying function of pressure, the resistive transition is broadened and strongly dependent on the measuring current. When T-c has a maximum at 2 K, the residual resistivity shows a peak, and the resistivity is linear in temperature above T-c.",
author = "Alexander Holmes and D. Jaccard and A. Demuer",
year = "2003",
month = feb,
language = "English",
volume = "34",
pages = "567--570",
journal = "Acta Phys. Polon. B",
issn = "0587-4254",
publisher = "Jagellonian University",
number = "2",

}

RIS

TY - JOUR

T1 - Resistivity and AC-calorimetric measurements of the superconducting transition in CeCu2Si2 under very high hydrostatic pressure in a helium-filled diamond anvil cell

AU - Holmes, Alexander

AU - Jaccard, D.

AU - Demuer, A.

PY - 2003/2

Y1 - 2003/2

N2 - In the ideal pressure conditions of a helium-filled diamond anvil cell, we have been able to probe the resistivity and, for the first time, the specific heat of the heavy fermion superconductor CeCu2Si2 at pressures over 6 GPa, down to temperatures below 100 mK, and in a magnetic field up to 8 T. We clearly observed the superconducting jump using the AC calorimetry technique, which provides a semi-quantitative measure of the sample specific heat. The evolution of the superconducting transition with pressure was observed quasi-simultaneously in a single sample in both the resistivity and heat capacity. The jump in C-p hints at changes in the coupling regime. When T-c is a rapidly varying function of pressure, the resistive transition is broadened and strongly dependent on the measuring current. When T-c has a maximum at 2 K, the residual resistivity shows a peak, and the resistivity is linear in temperature above T-c.

AB - In the ideal pressure conditions of a helium-filled diamond anvil cell, we have been able to probe the resistivity and, for the first time, the specific heat of the heavy fermion superconductor CeCu2Si2 at pressures over 6 GPa, down to temperatures below 100 mK, and in a magnetic field up to 8 T. We clearly observed the superconducting jump using the AC calorimetry technique, which provides a semi-quantitative measure of the sample specific heat. The evolution of the superconducting transition with pressure was observed quasi-simultaneously in a single sample in both the resistivity and heat capacity. The jump in C-p hints at changes in the coupling regime. When T-c is a rapidly varying function of pressure, the resistive transition is broadened and strongly dependent on the measuring current. When T-c has a maximum at 2 K, the residual resistivity shows a peak, and the resistivity is linear in temperature above T-c.

M3 - Article

VL - 34

SP - 567

EP - 570

JO - Acta Phys. Polon. B

JF - Acta Phys. Polon. B

SN - 0587-4254

IS - 2

ER -