| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-2147 - C8-2148 | |
| DOI | https://doi.org/10.1051/jphyscol:19888961 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2147-C8-2148
DOI: 10.1051/jphyscol:19888961
Institut für Festkörperforschung, Kernforschungsanlage Jülich, POB 1913, D-5170 Jülich, F.R.G.
J. Phys. Colloques 49 (1988) C8-2147-C8-2148
DOI: 10.1051/jphyscol:19888961
OBSERVATION OF ANTIFERROMAGNETIC ORDER IN YBa2Cu3O6.15 by CU NQR
H. Lütgemeier et B. RuppInstitut für Festkörperforschung, Kernforschungsanlage Jülich, POB 1913, D-5170 Jülich, F.R.G.
Abstract
The NQR spectra of YBa2Cu3Oy (6.0 < y < 6.25) show two different antiferromagnetic structures with a different stacking sequence. In both structures the magnetic moment is located at the Cu-2 sites perpendicular to the c-axis. The structure with antiferromagnetic coupling between all Cu-2 planes reveals strong temperature dependent magnetic fluctuations with correlation times of about 10-6 s at 15 K. No fluctuations are found in the second structure which reveals a constant internal field of about 0.2 T.