Mössbauer absorption in some high Tc superconductors:170Yb in YbBa2Cu3O7?x,166Er in ErBa2Cu3O7?x,and57Fe in YBa2Cu3O7?x |
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| Authors: | J A Hodges P Imbert G Jéhanno J B Marimon Da Cunha J P Sanchez |
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| Institution: | (1) DPHG/SPSRM Centre d'Etudes Nucléaires de Saclay, 91191 Gif-sur-Yvette, France;(2) Present address: Centre de Recherches Nucléaires, 67037 Strasbourg, France |
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| Abstract: | For the high Tc compound YbBa2Cu3O7−x, Mossbauer absorption measurements show that magnetic ordering occurs within the Yb3+ sublattice at 0.35K (μsat=1.7μB). For ErBa2Cu3O7−x the Er3+ sublattice orders at 0.7K (μsat=4μB). Measurements on57Fe diluted into YBa2Cu3O7−x shows that no ordered magnetic moments exist within the Cu sublattices down to at least 4.2K.
Instituto de Fisica, Porto-Alegre, Brasil (supported by CNPq) |
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