Emergence of Antiferromagnetic Correlation in LiTi_<2-x>V_xO_4 via ^7Li NMR(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We report ^7Li NMR studies of V-substitution effects on the spinel oxide superconductor LiTi_2O_4 (T_c=13.4K). In LiTi_<2-x>V_xO_4 (x=0-0.4), the V substitution for the Ti site suppressed the relative volume fraction of superconductivity faster than T_c. From the observation of a fairly homogeneous increase in ^7Li nuclear spin-lattice relaxation rate, we conclude that the V substitution changes electron correlation effects through electron carrier doping from quarter electron filling 3d^<0.5> to 3d^<1.5> and then the antiferromagnetic correlation emerges.
- 社団法人日本物理学会の論文
- 2008-12-15
著者
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YOSHIMURA Kazuyoshi
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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Itoh Yutaka
Department Of Chemistry Graduate School Of Science Kyoto University
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MORITSU Naofumi
Department of Chemistry, Graduate School of Science, Kyoto University
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Moritsu Naofumi
Department Of Chemistry Graduate School Of Science Kyoto University
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