Phase diagram of the mixed spin-2 and spin-5/2 Ising system with two different single-ion anisotropies

被引：30

作者：

da Cruz Filho, J. S. ^{[1
]}

Godoy, M. ^{[1
]}

de Arruda, A. S. ^{[1
]}

机构：

[1] Univ Fed Mato Grosso, Inst Fis, BR-78060900 Cuiaba, Mato Grosso, Brazil

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2013年 / 392卷 / 24期

关键词：

Phase diagram; Single-ion anisotropies; Mean-field approximation; CRITICAL-BEHAVIOR; MONTE-CARLO; TRICRITICAL BEHAVIOR; MAGNETIC-PROPERTIES; MODEL; TEMPERATURES;

D O I：

10.1016/j.physa.2013.08.007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the effect of two different single-ion anisotropies in the phase diagram and in the compensation temperature of mixed spin-2 and spin-5/2 Ising ferrimagnetic system. We employed the mean-field theory based on the Bogoliubov inequality for Gibbs free energy. We use the Landau expansion of free energy in the order parameter to describe the phase diagram. In the temperature versus single-ion anisotropy plane the phase diagram displays tricritical behavior. The critical and compensation temperatures increase with increasing values of the single-ion anisotropies. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：6247 / 6254

页数：8

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