| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-1191 - C8-1195 | |
| DOI | https://doi.org/10.1051/jphyscol:19888542 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1191-C8-1195
DOI: 10.1051/jphyscol:19888542
1 The Racah Institute of Physics, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel
2 School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, 69978 Tel-Aviv, Israel.
3 Department of Physics, University of California, Los-Angeles, California, 90024, U.S.A.
J. Phys. Colloques 49 (1988) C8-1191-C8-1195
DOI: 10.1051/jphyscol:19888542
DYNAMICS OF RANDOMLY DILUTED ANTIFERROMAGNETS
G. Polatsek1, O. Entin-Wohlman2 et R. Orbach31 The Racah Institute of Physics, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel
2 School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, 69978 Tel-Aviv, Israel.
3 Department of Physics, University of California, Los-Angeles, California, 90024, U.S.A.
Abstract
The fracton scaling model, and the efective-medium-approximation are used to describe the excitation spectrum of randomly diluted antiferromagnets. The calculated scattering structure factor exhibits a crossover from extended magnons to localized fractons. These calculations are in agreement with experimental data of inelastic-neutron-scattering off spin-waves in MnxZn1-xF2.