Phase diagram and tricritical behavior of a spin-3/2 transverse Ising model in a random field

被引：9
|
作者：
Liang, YQ [1 ]
Wei, GZ
Zhang, Q
Xin, ZH
Song, GL
机构：
[1] Northeastern Univ, Coll Sci, Shenyang 110006, Peoples R China
[2] Liaoning Univ, Dept Phys, Shenyang 110036, Peoples R China
[3] Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
[4] Machinery Res Inst Liaoning Province, Shenyang 110032, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 284卷
关键词：
transverse Ising model; random field; phase diagram;
D O I：
10.1016/j.jmmm.2004.06.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phase diagrams of a spin-3/2 transverse Ising model with a random field on honeycomb, square, and simple-cubic lattices, respectively, are investigated within the framework of an effective-field theory with correlations. We found that the behavior of the tricritical point and the reentrant phenomenon for the system with any coordination number z, when the applied random field is bimodal. The behavior of the tricritical point is also examined as a function of applied transverse field. The reentrant phenomenon comes from the competition between the transverse field and the random field. (C) 2004 Elsevier B.V. All rights reserved.
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页码：47 / 53
页数：7
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