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Phase Diagrams of a Spin‐One Ising Model with a Random Crystal Field in the Correlated Effective‐Field Treatment
Author(s) -
Kaneyoshi T.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221700133
Subject(s) - tricritical point , ising model , phase diagram , condensed matter physics , square lattice , random field , reentrancy , physics , crystal (programming language) , field (mathematics) , mathematics , statistical physics , phase (matter) , quantum mechanics , statistics , computer science , pure mathematics , programming language
The phase diagram of the spin‐one Ising model with a random crystal field D i on a square lattice is investigated by the use of the correlated effective‐field theory, when the random crystal field is distributed according to the law P ( D i ) = p δ ( D i − D ) + (1 − p ) δ ( D i ). A number of characteristic phenomena are obtained, such as the p ‐dependence of the tricritical point and the reentrant phenomenon due to the disorder of the crystal field.