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Magnetism and candidate muon-probe sites in RBa2Cu3O y

  • Superconductivity: Interplay with Magnetism Muon Probe Sites
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Abstract

Key results of zero-field (ZF) and transverse-field (TF) muon-spin-relaxation (μSR) experiments on superconducting and insulating RBa2Cu3O y (R123 y , with R=Eu, Gd, Pr and Pr/Y:y=6, 7) are examined. The chemical behavior of the positive muon probe is addressed, and muon-oxygen bonding is shown to occur in all these cuprates. To explain magnetic fields at muon-probe sites in Pr x Y1−x Ba2Cu3O y (0<=x<0.5,y=7 andx=0,y=6) samples, improvements on the reported magnetic structures from neutron diffraction are necessary. Cu magnetism in Pr123y (y=6,7) is observed belowT N1, which is near RT. The magnetism seen belowT N2 can be interpreted assuming an additional ordering in the Cutt-O chain layers. Alternatively, Pr ordering is also considered as the cause of the second phase transition. Considering the specific muon-probe location, a more detailed interpretation can be provided for the μSR parameters, measured in the normal and mixed states of these unconventional superconductors.

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Authors and Affiliations

  1. Physics Department, San Jose State University, 95192, San Jose, CA, USA

    W. K. Dawson, C. H. Halim, S. P. Weathersby, J. A. Flint, J. C. Lam, T. J. Hoffman & C. Boekema

  2. Texas Tech University, Lubbock, (TX)

    KC. B. Chan & R. L. Lichti

  3. Los Alamos National Laboratory, Los Alamos, NM

    D. W. Cooke & M. S. Jahan

  4. Temple University, Philadelphia, PA

    J. E. Crow

Authors
  1. W. K. Dawson
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  2. C. H. Halim
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  3. S. P. Weathersby
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  4. J. A. Flint
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  5. J. C. Lam
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  6. T. J. Hoffman
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  7. C. Boekema
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  8. KC. B. Chan
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  9. R. L. Lichti
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  10. D. W. Cooke
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  11. M. S. Jahan
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  12. J. E. Crow
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Dawson, W.K., Halim, C.H., Weathersby, S.P. et al. Magnetism and candidate muon-probe sites in RBa2Cu3O y . Hyperfine Interact 63, 219–226 (1991). https://doi.org/10.1007/BF02396006

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  • DOI: https://doi.org/10.1007/BF02396006

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