Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1801345 | Journal of Magnetism and Magnetic Materials | 2009 | 8 Pages |
Abstract
The phase diagrams of the transverse spin-1 Ising model with random interactions are investigated using a new technique in the effective field theory that employs a probability distribution within the framework of the single-site cluster theory based on the use of exact Ising spin identities. A model is adopted in which the nearest-neighbor exchange couplings are independent random variables distributed according to the law P(Jij)=pδ(JijâJ)+(1âp)δ(JijâαJ). General formulae, applicable to lattices with coordination number N, are given. Numerical results are presented for a simple cubic lattice. The possible reentrant phenomenon displayed by the system due to the competitive effects between exchange interactions occurs for the appropriate range of the parameter α.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Touria Bouziane, Mohammed Saber,