Mean-field theory of the semi-infinite spin-1/2 Ising model with random surface and bulk fields
- 30 June 1987
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 20 (18) , 2749-2757
- https://doi.org/10.1088/0022-3719/20/18/011
Abstract
All the possible phase diagrams of a three-dimensional semi-infinite spin-1/2 Ising model in a random field as a function of the ratio of bulk and surface interactions and the ratio of bulk and surface fields have been determined. Within the framework of the mean-field approximation eight generic types of phase diagrams can be found. It is also shown that such a system can exhibit a variety of phase transitions and multi-critical points.Keywords
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