Monte Carlo investigation of the tricritical point stability in a three-dimensional Ising metamagnet

Article

关键词: EXTERNAL MAGNETIC-FIELDS;    BLUME-CAPEL MODEL;    2 DIMENSIONS;    FEBR2;    BEHAVIOR;    PHASE;    ANTIFERROMAGNET;   

DOI  :  10.1103/PhysRevB.61.50

来源: SCIE

【 摘 要 】

We use Monte Carlo simulations to study multicritical properties of an Ising metamagnet in an external field. According to the mean field theory predictions, a three-dimensional layered metamagnet is expected to display a tricritical point decomposition to a critical and a bicritical end point, when a ratio between intralayer ferromagnetic and interlayer antiferromagnetic couplings becomes sufficiently small. Our simulations show no evidence of such a decomposition and produce a tricritical behavior even for a coupling ratio as small as R = 0.01.

【 授权许可】

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