摘要
以s=1 2的层状Ising模型为基础 ,建立一个描述层间反铁磁耦合的有限层磁性薄膜的统计模型 应用变分累积展开 (VCE)方法的一阶近似 ,导出了系统自发磁化强度、序参量、临界温度、磁化率的表达式 ,及其随层数L的变化关系 讨论了有外场存在时 ,系统对外磁场的响应 。
In this paper,a statistical model of magnetic multilayer system with interlayer antiferromagnetic coupling and intralayer ferromagnetic coupling is established and investigated by use of the first order approximation of variational cumulant expansion (VCE)method.It is obtained that the spontaneous magnetization,order parameter and magnetic susceptibility work as functions of temperature and the critical temperature varies with the parameter of the number of layers.The response of the system to the external field is also calculated and discussed.
出处
《首都师范大学学报（自然科学版）》
2005年第1期29-37,共9页
Journal of Capital Normal University：Natural Science Edition
