Rare earth substituted YBa2Cu3O
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Authors: | J A Hodges P Bonville P Imbert G Jéhanno |
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Institution: | (1) DSM-DPhG-SPSRM, Centre d'Etudes Nucléaires de Saclay, 91191 Gif-sur-Yvette, France |
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Abstract: | We present some selected results obtained using rare earth Mössbauer spectroscopy, on YBa2Cu3O x partially and/or totally substituted by Yb3+, Er3+ or Dy3+. We report measurements of the single ion crystal field anisotropy and of the size, direction and ordering temperature of the rare earth sublattice magnetic moments. We use dilute170Yb3+ ions to probe both the Cu(2) derived internal (molecular) fields and the fluctuation frequencies of the short range correlated Cu(2) moments. We monitor these frequencies as the carrier level is changed up towards the threshold needed to stabilise superconductivity. |
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