Superconducting State of the Layered Conductor α-(BEDT-TTF)_2NH_4Hg(SCN)_4 in Magnetic Fields Parallel to the Layer Plane
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概要
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The superconductivity of the quasi two-dimensional (2D) organic compound α-(BEDT-TTF)_2NH_4Hg(SCN)_4 in the magnetic field applied exactly parallel to the conducting plane is studied through the measurement of the specific heat, thermal conductivity and ac susceptibility in accordance with the resistance, covering the whole temperature range. According to the bulk measurements, the upper critical field H_<c2> is close to the field giving the end-point of zero-resistance, while the onset-junction and midpoint criteria from the resistance measurement give notable overestimation of H_<c2>, indicating fluctuating and/or inhomogeneous contributions to superconductivity. The H_<c2> at low temperature (0.1 K) is isotropic within the 2D plane and comparable to the BCS Pauli paramagnetic limit, although no first-order transition feature is observed. The detailed resistive transition characteristics are presented.
- 社団法人日本物理学会の論文
- 2002-09-15
著者
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山崎 比登志
岡山大・理
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Yamada H
Univ. Electro‐communications Tokyo Jpn
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Saito G
Kyoto Univ. Kyoto
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Saito G
Division Of Chemistry Graduate School Of Science Kyoto University
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Saito Gunzi
Chemistry Department Kyoto University
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YAMAZAKI Hitoshi
Department of Physics,Faculty of Science,Okayama University
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Kovalev Alexey
Physics Department Kyoto University:crest Japan Science And Technology Corporation
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SHIMOJO Yoshiro
Physics Department, Kyoto University
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ISHIGURO Takehiko
Physics Department, Kyoto University
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TANATAR Makariy
Physics Department, Kyoto University
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YAMOCHI Hideki
CREST, Japan Science and Technology Corporation
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Yamazaki H
Okayama Univ. Okayama
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Saito Gunzi
Depatment Of Chemistry Kyoto University
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Saito Gunji
Department Of Chemistry Kyoto University
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Yamochi H
Jst‐crest Kawaguchi
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Yamochi Hideki
Crest Jst:chemistry Department Kyoto University
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Ishiguro Takehiko
Physics Department Kyoto University:crest Jst
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SHIMOJO Yoshiro
National Institute of Advanced Industrial Science and Technology
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Tanatar Makariy
Department Of Physics Graduate School Of Science Kyoto University:crest Japan Science And Technology
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Shimojo Y
Japan Atomic Energy Research Institute
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Ishiguro T
Department Of Physics Graduate School Of Science Kyoto University:crest Japan Science And Technology
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SAITO Gunzi
Research Institute, Meijo University
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ISHIGAURO Takehiko
Electrotechnical Laboratory
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Yamazaki Hitoshi
Depertment Of Physics Faculty Of Science Okayama University
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