Instabilities in Ising systems with short- and long-range-correlated quenched random fields
- 24 November 1983
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 16 (33) , 6407-6413
- https://doi.org/10.1088/0022-3719/16/33/013
Abstract
The ferromagnetically ordered states of Ising systems with short-range-correlated random fields are shown to be unstable with respect to domain formation for dimensionalities dl=2. Domain wall roughening for 2-a for large separation r. For a>d the same results as for short-range field correlations are found. For al=2 and wall roughening for aor=5) and a<d(d<5). The borderline value for a above which the mean-field theory is valid is found to be six. Experimental consequences of these results are indicated.Keywords
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