^<59>Co-NMR Knight Shift of Aligned Crystals and Polycrystalline Samples of Superconducting Na_<0.3>CoO_2・1.3H_2O(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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The temperature (T) dependence of the ^<59>Co-NMR Knight shifts K of Na_<0.3>CoO_2・1.3H_2O has been studied, where samples of randomly oriented powder and aligned crystals have been used for the applied magnetic fields H ‖ ab plane and H ‖ c-axis, respectively. For both directions of H, the shift K decreases below the superconducting transition temperature T_c(H) with decreasing T, indicating that the superconducting electron pairs are in the singlet state. The upper critical fields H_<c2>(T) determined from the K(H)-T curves are found to be consistent with the values reported from the resistivity measurements for both directions of H.
- 社団法人日本物理学会の論文
- 2005-06-15
著者
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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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MOYOSHI Taketo
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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Takata Masaki
Jasri Spring-8
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Moyoshi Taketo
Department Of Physics Division Of Material Science Nagoya University
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Yokoi M
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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WATANABE Hidekazu
Department of Physics, Division of Material Science, Nagoya University
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MORI Yoshihiko
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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Watanabe Hidekazu
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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Mori Yoshihiko
Department Of Orthopaedic Surgery School Of Medicine Kanazawa 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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