| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-2203 - C8-2204 | |
| DOI | https://doi.org/10.1051/jphyscol:19888989 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2203-C8-2204
DOI: 10.1051/jphyscol:19888989
1 CENG/DRF/SPh/MDIH, 85X, F-38041 Grenoble Cedex, France
2 Université Joseph Fourier, Grenoble, France
3 INPG/ENSPG, F-38042 Saint Martin d'Hères Cedex, France
J. Phys. Colloques 49 (1988) C8-2203-C8-2204
DOI: 10.1051/jphyscol:19888989
MÖSSBAUER INVESTIGATION OF IRON DOPED YBa2Cu3O7-x
P. Dalmas de Réotier1, E. Gil1, P. Vulliet1, 2, A. Yaouanc1, P. Chaudouët3, J. P. Sénateur3 et F. Weiss31 CENG/DRF/SPh/MDIH, 85X, F-38041 Grenoble Cedex, France
2 Université Joseph Fourier, Grenoble, France
3 INPG/ENSPG, F-38042 Saint Martin d'Hères Cedex, France
Abstract
We have recorded 57Fe Mössbauer spectra of YBa2 (Cu1-yFey)3 O7-x powder sample and uniaxially oriented powder for 0.01 ≤ y ≤ 0.1 and x ≈ -0.2 or x ≈ 0.6. In the superconducting x ≈ 0 compounds we see three subspectra for y = 0.01 and four subspectra for y = 0.01. These subspectra correspond to different oxygen configurations around the iron atoms. From the oriented YBa2 (Cu0.94Fe0.06)3 O7.2 and YBa2 (Cu0.9Fe0.1)3 O6.4 compounds we deduce that more than 90 % iron substitutes Cu(1) site. The iron magnetic moments order antiferromagnetically at ≈ 18 K and ≈ 1.5 K for the x = -0.2, y = 0.06 and x = 0, y = 0.01 compounds respectively.