AC heat capacity and resistivity measurements on the pressure-induced superconductor CeIrSi3 without inversion center

We present the result of an antiferromagnet CeIrSi3 without inversion center by measuring the heat capacity and the electrical resistivity of CeIrSi3. Both physical quantities were measured in the same run for the same single crystal sample. A huge heat capacity anomaly was observed at the supercond...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2008-04, Vol.403 (5-9), p.1156-1158
Main Authors: TATEIWA, N, HAGA, Y, IKEDA, S, MATSUDA, T. D, YAMAMOTO, E, OKUDA, Y, MIYAUCHI, Y, SETTAI, R, ONUKI, Y
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Physics
Studies of specific magnetic materials
Superconducting materials (excluding high-tc compounds)
Superconductivity
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Summary:We present the result of an antiferromagnet CeIrSi3 without inversion center by measuring the heat capacity and the electrical resistivity of CeIrSi3. Both physical quantities were measured in the same run for the same single crystal sample. A huge heat capacity anomaly was observed at the superconducting transition temperature where the zero-resistivity was observed. The jump of the heat capacity DeltaCac/Cac is 5.7+/-0.1 at 2.58GPa. This value is the largest among previously reported superconducting materials, indicating the strong coupling superconductivity. The electronic specific heat coefficient just above Tsc is roughly estimated to be at 2.58GPa, which is the same as at ambient pressure.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2007.10.353