| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-2155 - C8-2156 | |
| DOI | https://doi.org/10.1051/jphyscol:19888965 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2155-C8-2156
DOI: 10.1051/jphyscol:19888965
1 Institut Laue-Langevin, BP 156X, F-38042 Grenoble Cedex, France
2 Institut f. Anorg. Chemie, Auf der Morgenstelle, D-7400 Tübingen, F.R.G.
J. Phys. Colloques 49 (1988) C8-2155-C8-2156
DOI: 10.1051/jphyscol:19888965
MAGNETIC FLUCTUATIONS IN THE COMPOUNDS YBa2CU3O6+x (0 < x < 1)
Th. Brückel1, K. U. Neumann1, H. Capellmann1, O. Schärpf1, S. Kemmler-Sack2, R. Kiemel2 et W. Schäfer21 Institut Laue-Langevin, BP 156X, F-38042 Grenoble Cedex, France
2 Institut f. Anorg. Chemie, Auf der Morgenstelle, D-7400 Tübingen, F.R.G.
Abstract
We performed neutron scattering experiments using polarization analysis on the high temperature superconductor YBa2Cu3O6.9 and the related semiconducting compounds YBa2Cu3O6+x (x = 0.11, 0.37). While we found paramagnetic fluctuations in the non-superconducting samples, we established severe upper bounds for the total magnetic intensity for the superconductor. We conclude that magnetic couplings as a source for superconductivity in YBa2Cu3O7 are highly unlikely.