二维Ising反铁磁-反铁磁超晶格的磁性  

MAGNETISM OF TWO DIMENSIONAL ISING ANTIFERRO-ANTIFERROMAGNET1C SUPERLATTICE

作　　者：曹恕[1] 郭琳[1] 

机构地区：[1]东南大学物理系,南京210018

出　　处：《低温物理学报》1992年第1期49-59,共11页Low Temperature Physical Letters

基　　金：国家自然科学基金;中国科学院物理研究所磁学开放实验室基金

摘　　要：本文用有效场理论讨论二维反铁磁一反铁磁超晶格(AFAFs)在无外场时的临界温度与超晶格结构的依赖关系,并讨论了超晶格中每一层的磁化强度、磁化率与温度和超晶格结构的依赖关系,得到了由于超晶格结构导致的磁化率的异常峰的存在.并从超晶格的对称性出发讨论了反铁磁-反铁磁超晶格和铁磁-铁磁超晶格之间的异同.An effective-field treatment for the two di mensional Ising antiferro-antiferromagnetic su-perlattice (AFAFS) without external field has been presented. The critical temperature dependence of the number of layers of superlattice cell and temperature dependence of magnetisation and the initial susceptibility were investigated. We have deduced that the anomalous peaks appeared in susceptibility. The similarity and the difference of the properties between AFAFS and that of ferro-ferromagnedc superlattice were also discussed from the symetry of the super-lattice.

关 键 词：AFAFS 临界温度 磁化率 磁化强度 

分 类 号：O737[理学—晶体学]