MEAN-FIELD SOLUTION OF A NONEQUILIBRIUM RANDOM-EXCHANGE ISING-MODEL SYSTEM

被引:11
作者
ALONSO, JJ
MARRO, J
机构
[1] Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Granada
来源
PHYSICAL REVIEW B | 1992年 / 45卷 / 18期
关键词
D O I
10.1103/PhysRevB.45.10408
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report first-order mean-field results for nonequilibrium random-exchange lattice systems, namely, Ising-like models whose kinetics involve a simultaneous, random competition between ferromagnetic and antiferromagnetic interactions that generally induces nonequilibrium steady states. We consider the competition between symmetric bonds. +/- J0, symmetric bonds competing with broken ones, +/- J0 and J = 0, nonsymmetric bonds, \J1\ and -\J2\, and some of those systems under an external magnetic field h. The time evolution and steady-state properties, including phase diagrams, are obtained for several lattice coordination numbers, e.g., the case of simple-cubic lattices of dimension d less-than-or-equal-to 3. A comparison is made with existing exact results for d = 1, h = 0, and +/- J0.
引用
收藏
页码:10408 / 10418
页数:11
相关论文
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