Anomalous Behavior of the Upper-Critical-Field in Heavy-Fermion Superconductor CeRhSi3
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概要
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We report the temperature dependence of the upper-critical-field $B_{\text{c2}}(T)$ with the fields along the tetragonal $c$-axis of the pressure-induced heavy-fermion superconductor CeRhSi3 under several pressures. A bend in the $B_{\text{c2}}(T)$ curve emerges at a pressure at which the antiferromagnetic order disappears. Simultaneously, an anomaly in the electrical resistivity in the normal state appears above the magnetic field of the bend point. Moreover, the initial slope [$-\mathrm{d}B_{\text{c2}}(T)/\mathrm{d}T]_{T_{\text{c}}}$ is abruptly enhanced above the pressure at which the bend emerges. The anomalous behavior of $B_{\text{c2}}(T)$ is probably related to the antiferromagnetism and the anomaly in the normal state.
- 2010-06-15
著者
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KIMURA Noriaki
Graduate School of Science and Center for Low Temperature Science, Tohoku University
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AOKI Haruyoshi
Graduate School of Science and Center for Low Temperature Science, Tohoku University
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Ilya Sheikin
Grenoble High Magnetic Field Laboratory, CNRS, BP166, 38042 Grenoble Cedex 9, France
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Noriaki Kimura
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Taichi Terashima
National Institute for Materials Research, Tsukuba, Ibaraki 305-0047, Japan
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Taichi Terashima
National Institute for Materials Science, Tsukuba, Ibaraki 305-0003, Japan
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Sugawara Tetsuya
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Florence Lévy
DPMC, Université de Genève, Geneva, Switzerland
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Tetsuya Sugawara
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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