| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-2161 - C8-2162 | |
| DOI | https://doi.org/10.1051/jphyscol:19888968 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2161-C8-2162
DOI: 10.1051/jphyscol:19888968
1 INPG/ENSPG, F-38042 Saint-Martin d'Hères Cedex, France
2 CENG/DRF/SPh/MDIH 85X, F-38041 Grenoble Cedex, France
3 Université Jospeh Fourier, Grenoble, France
J. Phys. Colloques 49 (1988) C8-2161-C8-2162
DOI: 10.1051/jphyscol:19888968
STUDY OF THE ELECTRIC FIELD GRADIENT IN EuBa2Cu3O7-δ (δ ≈ 0 AND δ ≈ 1) BY 151Eu MÖSSBAUER SPECTROSCOPY
P. Chaudouët1, J. P. Sénateur1, F. Weiss1, P. Dalmas de Réotier2, P. Vulliet2, 3 et A. Yaouanc21 INPG/ENSPG, F-38042 Saint-Martin d'Hères Cedex, France
2 CENG/DRF/SPh/MDIH 85X, F-38041 Grenoble Cedex, France
3 Université Jospeh Fourier, Grenoble, France
Abstract
We have measured the quadrupole interaction parameter and the asymmetry coefficient at the 151Eu Mössbauer nucleus for EuBa2Cu3O7-δ, δ ≈ 0 and δ ≈ 1. The measurements have been extended up to 420 K and 600 K respectively. From the temperature dependence of the electric field gradient parameter VEuzz and the isomer shift we deduce that the contribution of the excited electronic state of EU3+ to the measured parameters is stronger in the superconducting than in the semiconducting oxide.