蜂窝状格子带有晶场作用的铁磁Ising混合自旋S=1和S=1/2的相图的Monte-Carlo研究  

MONTE CARLO STUDY OF THE PHASE DIAGRAM OF ISING FERROMAGNET WITH MIXED SPINS OF S=l/2 AND S=l WITH A CRYSTAL FIELD INTERACTION ON THE HONEYCOMB LATTICE

作　　者：张国民[1] 杨传章[1] 

机构地区：[1]苏州大学物理系,苏州215006

出　　处：《物理学报》1993年第6期987-991,共5页Acta Physica Sinica

摘　　要：利用具有翻转单个自旋的Metropolis-Monte-Carlo算法,研究蜂窝状格子带有晶场作用的铁磁Ising混合自旋S=1和S=1/2的相图,所得相图与严格解相接近,好于关联有效场方法得出的结果。因此Metropolis-Monte-Carlo算法同样也可以用于研究混合自旋模型。The single-spin-flip Metropolis-Monte-Carlo algorithm is applied to the study of phase diagram of Ising ferromagnet with mixed spins of S = l/2 and S = 1 with a crystal field interaction on the honeycomb lattice. The phase diagram we obtained is very close to the exact solutions and better than the results of effective field theory with correlations. All these make us arrixe the conclusion that the Metropolis Monte Carlo algorithm can also be used to study the mixed-spin model.

关 键 词：自旋 相图 蒙特卡罗法 伊辛模型 

分 类 号：O482.5[理学—固体物理]