期刊
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
卷 393, 期 -, 页码 297-303出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physa.2013.09.003
关键词
Blume Capel model; Multicritical points; Effective-field theory; Landau free energy; Phase diagram
资金
- CNPq
- CAPES
- FAPEAM
- FAPEMIG
The general-spin Blume-Capel model is studied by using an effective-field theory with correlation. An expression for the free energy within the effective-field theory is proposed, and the complete phase diagram is constructed in the temperature and single-ion anisotropy plane. The first-order transition lines are obtained by Maxwell construction (comparison between free energies). Beyond first-order transitions at low temperatures, the results show second-order transitions and tricritical points, as well as a variety of double critical endpoints. The existence of the tricritical point and the number of critical endpoints strongly depend on the value of the spin. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据