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μ− SR studies of oxide-superconductorsSR studies of oxide-superconductors

  • Muonic Hydrogen, Negative Muons
  • Published:
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Abstract

The negative muon spin rotation method (μ− SR) has been applied to studies of electronic states at oxygen sites of oxide superconductors YBa2Cu3O7, Nd2−x Ce x CuO4−δ (x=0.15, oxygen reduced), LiTi2O4 and related oxide-insulators La2CuO4−δ, CuO, Cu2O. The paramagnetic shifts of μ− trapped at oxygen nuclei in these polycrystalline powder samples have been measured at 300 K. All the measured shifts are positive. In copper-oxides the paramagnetic shifts are of the order 10−3, while in LiTi2O4 is very small (8.4±3.34×10−5). In YBa2Cu3O7, a fast μ− spin relaxation timeT 2 * (∼ 200 ns) has been observed; the reason for this is unknown and further studies are now in progress.

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Authors and Affiliations

  1. Dept. of Physics, Tokyo Institute of Technology, Meguro-ku, 152, Tokyo, Japan

    N. Nishida, S. Okuma, H. Miyatake & S. Shiratake

  2. NTT Optoelectronics Laboratories, Tokai, 319-11, Ibaraki, Japan

    Y. Hidaka & T. Murakami

  3. The Institute for Solid State Physics, U. of Tokyo, Roppongi, Minato-ku, 106, Tokyo, Japan

    Y. Ueda, S. Kambe & H. Yasuoka

  4. Dept. of Chemistry, University of Kyoto, Kyoto, Japan

    Y. Ueda & K. Kosuge

  5. Engineering Research Institute, University of Tokyo, Bunkyo-ku, 113, Tokyo, Japan

    H. Takagi & S. Uchida

  6. Meson Science Laboratory, U. of Tokyo, Bunkyo-ku, 113, Tokyo, Japan

    K. Nishiyama & K. Nagamine

  7. TRIUMF, Vancouver, B.C., Canada

    Y. Kuno

  8. Institute for Nuclear Study, Tanashi, Tokyo, Japan

    T. Yamazaki

Authors
  1. N. Nishida
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  2. S. Okuma
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  3. H. Miyatake
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  4. S. Shiratake
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  5. Y. Hidaka
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  6. T. Murakami
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  7. Y. Ueda
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  8. K. Kosuge
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  9. S. Kambe
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  10. H. Yasuoka
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  11. H. Takagi
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  12. S. Uchida
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  13. K. Nishiyama
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  14. K. Nagamine
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  15. Y. Kuno
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  16. T. Yamazaki
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Nishida, N., Okuma, S., Miyatake, H. et al. μ− SR studies of oxide-superconductorsSR studies of oxide-superconductors. Hyperfine Interact 65, 1027–1034 (1991). https://doi.org/10.1007/BF02397758

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  • DOI: https://doi.org/10.1007/BF02397758

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