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161Dy Mössbauer measurements in DyBa2Cu3O7−x |
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| Authors: | J A Hodges P Imbert J B Marimon da Cunha J P Sanchez |
| Institution: | (1) Centre d’Etude Nucléaires de Saclay, DPhG/SPSRM, 91191 Gif-sur-Yvette, France;(2) Centre de Recherches Nucléaires IN2P3, 67037 Strasbourg, France;(3) Present address: Instituto de Fisica, UFRGS, Porto Alegre, Brazil |
| Abstract: | Superconducting and non-superconducting samples of DyBa2Cu3O7?x have been examined by Mössbauer spectroscopy down to 0.05 K. The saturated Dy3+ sublattice 4f shell magnetic moments and quadrupole interactions show fairly wide distributions in both samples. These are attributed to crystal field inhomogeneities. Neither the Dy3+ paramagnetic relaxation rates nor the isomer shifts show any evidence of coupling between Dy3+ and a possible conduction band. |
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