Anisotropic Behavior of Knight Shift in Superconducting State of Na_xCoO_2・yH_2O(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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The Co Knight shift was measured in an aligned powder sample of Na_xCoO_2・yH_2O, which shows superconductivity at T_c〜4.6K. The Knight-shift components parallel (K_c) and perpendicular to the c-axis (along the ab plane K_<ab>) were measured in both the normal and superconducting (SC) states. The temperature dependences of K_<ab> and K_c are scaled with the bulk susceptibility, which shows that the microscopic susceptibility deduced from the Knight shift is related to Co-3d spins. In the SC state, the Knight shift shows an anisotropic temperature dependence : K_<ab> decreases below 5K, whereas K_c does not decrease within experimental accuracy. This result raises the possibility that spin-triplet superconductivity with the spin component of the pairs directed along the c-axis is realized in Na_xCoO_2・yH_2O.
- 社団法人日本物理学会の論文
- 2006-01-15
著者
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YOSHIMURA Kazuyoshi
Department of Chemistry, Graduate School of Science, Kyoto University
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Ihara Yoshihiko
Department Of Physics Graduate School Of Science Kyoto University
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ISHIDA Kenji
Department of Physics, Graduate School of Science, Kyoto University
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KATO Masaki
Department of Chemistry, Graduate School of Science, Kyoto University
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Yoshimura Kazuyoshi
Department Of Applied Science Tokyo Electrical Engineering College
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ITOH Yutaka
Department of Chemistry, Graduate School of Science, Kyoto University
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Kato Masaya
Department Of Physics Division Of Material Science Nagoya University:crest Japan Science And Technol
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MICHIOKA Chishiro
Department of Chemistry, Graduate School of Science, Kyoto University
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Kato Masatune
Department Of Physics Faculty Of Science Hiroshima University
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Masaki Kato
Department Of Chemistry Graduate School Of Science Kyoto University
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Kanada Masaki
Department Of Physics Division Of Material Science Nagoya University
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Itoh Yutaka
Department Of Chemistry Graduate School Of Science Kyoto University
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Sakurai Hiroya
Superconducting Materials Center National Institute For Materials Science (smc
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Kimata Motoi
The Graduate School Of Science And Technology Kobe University
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Kato M
Toyohashi Univ. Technol. Aichi Jpn
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Kodama Masafumi
The Graduate School Of Science And Technology Kobe University
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TAKEYA Hideo
Department of Physics, Graduate School of Science, Kyoto University
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TAKADA Kazunori
Advanced Materials Laboratory, National Institute for Materials Science
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SASAKI Takayoshi
Advanced Materials Laboratory, National Institute for Materials Science
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MUROMACHI Eiji
Superconducting Materials Center, National Institute for Materials Science
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Sakurai Hiroya
Superconducting Materials Center National Institute For Materials Science (smc/nims)
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Takeya Hideo
Department Of Physics Graduate School Of Science Kyoto University
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Kato Mayumi
Institute For Solid State Physics University Of Tokyo
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Sasaki T
Advanced Materials Laboratory National Institute For Materials Science
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Michioka Chishiro
Department Of Chemistry Graduate School Of Science Kyoto University
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Kasai Mayumi
Department Of Physics Division Of Material Science Nagoya University
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Ishida Kenji
Department Of Orthopaedic Surgery Kochi Medical School
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Kato M
Institute For Solid State Physics University Of Tokyo
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Sakai Hironori
Advanced Science Research Center Japan Atomic Energy Agency
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Michioka C
Department Of Chemistry Graduate School Of Science Kyoto University
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Muromachi Eiji
Superconducting Materials Center National Institute For Materials Science
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Takada Kazunori
Advanced Materials Laboratory National Institute For Materials Science
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Sasaki Takayoshi
Advanced Materials Laboratory National Institute For Materials Science
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Kato Masaki
Department Of Molecular Science And Technology Faculty Of Engineering Doshisha University
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Kato Masaki
Department Of Chemical Science And Engineering Graduate School Of Engineering Science Osaka Universi
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Ishida Kenji
Department Of Chemical Science And Engineering Graduate School Of Engineering Kobe University
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