三维横向晶场稀疏Ising模型的相变行为及磁化  

Phase transition behaviors and magnetizations of three-dimensional transverse crystal field dilution Ising model

作　　者：许玲[1] 晏世雷[1] 

机构地区：[1]苏州大学物理科学与技术学院,江苏苏州215006

出　　处：《苏州大学学报（自然科学版）》2007年第1期33-36,共4页Journal of Soochow University(Natural Science Edition)

基　　金：江苏省高等学校自然科学重点基金资助项目(03KJA140117);薄膜材料江苏省重点实验室开放资助项目(K2022)

摘　　要：在有效场理论和切断近似的框架内,研究自旋S=1横向晶场稀疏Ising模型的相变行为和磁化.研究发现晶场稀疏情况下,相图的负晶场方向存在临界温度的峰值,正晶场方向随晶场浓度的降低出现重入现象,高温和低温下的磁化存在许多差异.Within the effective field theory and cutting approximation, we investigate the phase transition behaviors and magnetizations of spin- 1 three-dimensional transverse crystal field dilution Ising model. Under crystal field dilution condition, there exists the peak value of critical temperature in the direction of negative crystal field, while the reentrant phenomena appear in the direction of positive crystal field by decreasing of crystal field dilution concentration. The magnetizations have a lot of differences at high and low temperatures.

关 键 词：横向晶场稀疏Ising模型 相变行为 磁化 

分 类 号：O482.52[理学—固体物理]