| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-1229 - C8-1230 | |
| DOI | https://doi.org/10.1051/jphyscol:19888557 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1229-C8-1230
DOI: 10.1051/jphyscol:19888557
1 Univ. Calif., Santa Cruz, CA 95064, U.S.A.
2 Institut Laue-Langevin, 38042, Grenoble Cedex, France
3 Univ. Calif., Santa Barbara, CA 93106, U.S.A.
4 Hahn-Meitner-Institut, 1000 Berlin 39, Glienicker Str., F.R.G.
J. Phys. Colloques 49 (1988) C8-1229-C8-1230
DOI: 10.1051/jphyscol:19888557
RANDOM EXCHANGE ISING MODEL DYNAMICS : Fe0.46Zn0.54F2
D. P. Belanger1, B. Farago2, V. Jaccarino3, A. R. King3, C. Lartigue4 et F. Mezei41 Univ. Calif., Santa Cruz, CA 95064, U.S.A.
2 Institut Laue-Langevin, 38042, Grenoble Cedex, France
3 Univ. Calif., Santa Barbara, CA 93106, U.S.A.
4 Hahn-Meitner-Institut, 1000 Berlin 39, Glienicker Str., F.R.G.
Abstract
Spin-echo neutron scattering techniques were used to investigate the dynamic critical behavior for T > TN of the random exchange Ising antiferromagnet Fe0.46Zn0.54F2 and for FeF2 at H = 0. The data are adequately described for q = 0 by Ɖ = Ɖ0tνz. Ɖ0 is decreased 100 fold upon dilution. For both systems z ≈ γ/ν in agreement with the conventional theory.