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139La and63Cu-NQR of high-T c oxide superconductors

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Abstract

Nuclear quadrupole resonances (NQR) of139La in La2−xMxCuO4 (M=Ba, Sr) and63Cu in YBa2CU3O7 have been investigated with substitution of Cu by magnetic impurities. For La-system, the strong enhancement of the nuclear relaxation rate, 1/T 1 atT c *≈10 K (suggesting the occurrence of magnetic instability with hole-doping), is suppressed by 3D-antiferromagnetism induced by magnetic impurities. In the superconducting region, fluctuations of Cu moments at low temperatures remain extremely fast as at high temperatures. For Y-system, Fe-ions are substituted for both Cu(1) and Cu(2) sites, But Co-ions are preferentially substituted to Cu1 sites. The peaks in the relaxation rate of Cu indicate the appearance of magnetic ordering without destroying superconductivity for the 0.5%-Fe doped sample.

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References

  1. I. Watanabe, K. Kumagai, Y. Nakamura, T. Kimura, Y. Nakamichi and H. Nakajima, J. Phys. Soc. Jpn. 56 (1987) 3028.

    Article  Google Scholar 

  2. H. Nishihara, H. Yasuoka, T. Shimizu, T. Tsuda, T. Imai, S. Sasaki, S. Kanbe, K. Kishio, K. Kitazawa and K. Fueki, J. Phys. Soc. Jpn. 56 (1987) 4559.

    Article  Google Scholar 

  3. Y. Kitaoka, S. Hiramatsu, T. Kondo and K. Asayama, J. Phys. Soc. Jpn. 57 (1988) 30

    Article  ADS  Google Scholar 

  4. K. Kumagai, I. Watanabe, H. Aoki, Y. Nakamura, T. Kimura, Y. Nakamichi and H. Nakajima, Physica B148 (1987) 480.

    Article  Google Scholar 

  5. J.M. Tranquada et al., Phys. Rev. Lett. 60 (1988) 156.

    Article  ADS  Google Scholar 

  6. N. Nishida et al., J. Phys. Soc. Jpn. 57 (1988) 597.

    Article  ADS  Google Scholar 

  7. I. Watanabe, Y. Nakamura and K. Kumagai, Physica C152 (1988) 262.

    Article  ADS  Google Scholar 

  8. K. Kumagai, Y. Nakamichi, I. Watanabe, Y. Nakamura, H. Nakajima, N. Wada and P. Lederer, Phys. Rev. Lett. 60 (1988) 724.

    Article  ADS  Google Scholar 

  9. A. Aharony, R.J. Birgeneau, A. Coniglio, M.A. Kastner and H.E. Stanley, Phys. Rev. Lett. 60 (1988) 1330.

    Article  ADS  Google Scholar 

  10. Y. Kohori, H. Shibai, Y. Oda, Y. Kitaoka, T. Kohara and K. Asayama, J. Phys. Soc. Jpn. 57 (1988) 1568.

    Article  Google Scholar 

  11. M.R. MacHenry B.G. Silbernagel and J.H. Wernik, Phys. Rev. B5 (1972) 2958.

    Article  ADS  Google Scholar 

  12. T. Tamaki, T. Komai, A. Ito, Y. Maeno and T. Fujita, Solid State Commun. 65 (1988) 43.

    Article  Google Scholar 

  13. T. Kajitani, K. Kusaba, M. Kikuchi, Y. Shono and M. Hirabayashi, Jpn. J. Appl. Phys. 26 (1987) L1727.

    Article  Google Scholar 

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, Hokkaido University, 060, Sapporo, Japan

    K. Kumagai, Y. Nakamichi, Y. Nakamura, I. Watanabe & H. Nakajima

  2. Department of Physics, Faculty of Science, Hiroshima University, 730, Hiroshima, Japan

    T. Fujita

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  1. K. Kumagai
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  2. Y. Nakamichi
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  3. Y. Nakamura
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  4. I. Watanabe
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  5. H. Nakajima
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  6. T. Fujita
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Kumagai, K., Nakamichi, Y., Nakamura, Y. et al. 139La and63Cu-NQR of high-T c oxide superconductors. Hyperfine Interact 50, 583–591 (1989). https://doi.org/10.1007/BF02407695

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