最近邻相互作用对混合自旋Blume-Capel模型磁化强度的影响  

Effect of near-neighbor interaction on magnetization of hybrid spin Blume-Capel model

作　　者：李晓杰 蔡秀国 信苗苗 LI Xiao-Jie;CAI Xiu-Guo;XIN Miao-Miao(Qilu Institute of Technology, Jinan 250200, China)

机构地区：[1]齐鲁理工学院,济南250200

出　　处：《原子与分子物理学报》2020年第3期390-396,共7页Journal of Atomic and Molecular Physics

基　　金：齐鲁理工学院校级课题(JG201858)。

摘　　要：利用有效场论研究了最近邻原子间交换相互作用对纳米管晶格点磁化强度的影响.研究结果表明,最近邻交换相互作用和晶场强度相互竞争,使系统表现出丰富的磁化特性.当负晶场作用于系统时,系统存在一级相变.当晶场参数和交换相互作用不同时,系统磁化强度表现出奇异性.The effect of the exchange interaction between the nearest neighbor atoms on the nanotubes on the magnetization of lattice points in the Blume-Capel model was studied by using the effective field theory.The results show that the nearest neighbor exchange interaction and the strength of crystal field compete with each other,which makes the system show rich magnetic characteristics.When the negative crystal field acts on the system,the first order phase transition occurs.The magnetization of the system is remarkably different when the parameters of the crystal field and the exchange interaction are different.

关 键 词：最近邻相互作用 磁化强度 BLUME-CAPEL模型 纳米管 有效场理论 

分 类 号：O65[理学—分析化学]