Trimodal random-field distribution of a mixed spin Ising model

被引：7
|
作者：
Liang, YQ [1 ]
Wei, GZ
Song, GL
机构：
[1] Liaoning Univ, Dept Phys, Shenyang 110036, Peoples R China
[2] Northeastern Univ, Coll Sci, Shenyang 110006, 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：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2004年 / 241卷 / 08期
关键词：
D O I：
10.1002/pssb.200301996
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A mixed spin Ising system consisting of spin-1/2 and spin-3/2 with a random field is studied theoretically by the use of effective field theory with correlations (EFT). The phase diagrams and thermal behaviors of magnetization are investigated numerically for a square lattice (z = 4) when the random field is bimodally and trimodally distributed. The results show that tricritical points exist when the external random fields H and the values of p are not too large. Re-entrant phenomena can be seen for appropriate ranges of p and random fields H. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：1916 / 1922
页数：7
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