稀释晶场中最近邻弱交换相互作用对重入现象的影响  

The Effect of the Nearest Neighbor Weak Exchange Interaction on the Reentrant Phenomenon in the Diluted Crystal Field

作　　者：李晓杰 王渺渺 LI Xiao-jie;WANG Miao-miao(Qilu Institute of Technology,Jinan 250200,China)

机构地区：[1]齐鲁理工学院,山东济南250200

出　　处：《云南师范大学学报（自然科学版）》2021年第1期36-41,共6页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：齐鲁理工学院科技计划资助项目(QL19K060).

摘　　要：利用有效场理论研究了稀释晶场中混合自旋Blume-Capel模型纳米管系统的重入现象,得到了系统的重入现象与稀释晶场取值概率、晶场和外壳层与内壳层格点间最近邻交换相互作用的关系.结果表明:取值概率、交换相互作用和晶场强度等诸多因素相互竞争,使系统表现出比恒定晶场作用的Blume-Capel模型更为丰富的磁化行为:负晶场增强,导致系统的二级相变消失;较强负晶场的作用使系统发生一级相变;一定条件下,系统呈现重入行为.The reentrant phenomenon of hybrid spin Blume-Capel model nanotube system in diluted crystal field is studied by using effective field theory.The results show that the system exhibits richer magnetization behavior than the Blume-Capel model with constant crystal field interaction due to the competition of various factors,such as value probability,exchange interaction and crystal field strength.The strong negative crystal field causes the first-order phase transition of the system.Under certain conditions,the system presents the reentrant phenomenon.

关 键 词：重入现象 磁化强度 有效场理论 BLUME-CAPEL模型 纳米管 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]