^<59>Co NQR Study on Superconducting Na_xCoO_2・yH_2O
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概要
- 論文の詳細を見る
Layered Co oxide Na_xCoO_2・yH_2O with a superconducting transition temperature T_c = 4.5 K has been studied by ^<59>Co NQR. The nuclear spin relaxation rate 1/^59T_ 1 is nearly proportional to temperature T in the normal state. In the superconducting state, it exhibits the coherence peak and decreases with decreasing T below 〜0.8T_c. Detailed comparison of the l/ T_ 1T values and the magnetic susceptibilities between Na_xCoO_2・yH_2O and Na_xCoO_2 implies that the metallic state of the former system is closer to a ferromagnetic phase than that of the latter. These experimental results impose a restriction on the mechanism of the superconductivity.
- 社団法人日本物理学会の論文
- 2003-09-15
著者
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田中 紘一
Research Reactor Institute Kyoto University
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SATO Masatoshi
Department of Physics,Division of Material Science,Nagoya University
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KOBAYASHI Yoshiaki
Department of Physics, Division of Material Science, Nagoya University
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Kobayashi Y
Department Of Physics Division Of Material Science Nagoya University
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YOKOI Mai
Department of Physics, Division of Material Science, Nagoya University
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Kudo Y
Environment & Analysis Technology Department Technical Support Center Sony Corporation
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KUDO Yoshihiro
Sony Corporation Research Center
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Yokoi M
Department Of Physics Division Of Material Science Nagoya University
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Kamihara Yoichi
Erato-sort Jst In Frontier Research Center Tokyo Institute Of Technology
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Kudo Y
Research Reactor Institute Kyoto University
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Kudo Yoshihiro
Environment & Analysis Technology Department Technical Support Center Sony Corporation
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Yokoi Mai
Department Of Physics Division Of Material Science Nagoya University
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Sato Masatoshi
Department Of Electrical And Electronics Engineering Sophia University
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Kobayashi Yoshiaki
Department Of Physics Division Of Material Science Nagoya University
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Mlura Yoko
Department Of Physics Nagoya University
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Sato Masatoshi
Department Of Agro-environmental Science Obihiro University Of Agriculture And Veterinary Medicine
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