Study of the Blume-Emery-Griffiths model on the triangular lattice by the cluster-variation method

Gintautas Grigelionis and Anders Rosengren

Physica A: Statistical Mechanics and its Applications, 1994, vol. 208, issue 2, 287-299

Abstract: The cluster-variation method (CVM) is used to investigate the phase diagram of the Blume-Emery-Griffiths (BEG) model on the triangular lattice. New topologies of the phase diagrams for K|J| < -1 including three antiquadrupolar phases (in the ferromagnetic case; J> 0) and antiquadrupolar and ferrimagnetic phases (in the antiferromagnetic case; J < 0) are obtained. No previously reported reentrant phenomenon is found. Good accuracy of CVM is confirmed in comparison with the results of the analytic and Monte Carlo calculations.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:208:y:1994:i:2:p:287-299

DOI: 10.1016/0378-4371(94)00051-4

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