层间有反铁磁交换相互作用的磁性超晶格的推迟模式  

THE RETARDED MODES OF MAGNETIC SUPERLATTICES WITH ANTIFERROMAGNETIC INTERLAYER COUPLING

作　　者：高红[1] 杜梅芳[2] 王选章[1] 

机构地区：[1]哈尔滨师范大学 [2]上海理工大学

出　　处：《哈尔滨师范大学自然科学学报》2001年第4期96-100,共5页Natural Science Journal of Harbin Normal University

摘　　要：我们用等效介质理论计算了层间有反铁磁交换的侧向超晶格 .当外场垂直于磁性或非磁性层时 ,在这种超晶格中存在两种磁序 :反转自旋 ( flop)和平行自旋磁序 .我们发现 ,这两种磁序的表面模的频率随外场和层间耦合的变化情况很不同 .前一种磁序中 ,模式的频率对层间耦合非常敏感 。We calculate retarded modes of lateral-magnetic superlattices with antiferromagnetic interlayer coupling,which are described with and effective medium theory.There can be two magnetic orderings in these superlattices the flop spin and parallel spin orderings in an external magnetic field normal to magnetic or nonmagnetic layers.We find that in the voigt geometry the frequency of surface modes versus the external magnetic field and the interlayer coupling is very different in these two different magnetic orderings.The mode frequency,in the first ordering,is rather sensitive to the interlayer coupling.We also find two critical values of the external field for the presence of the surface mode.

关 键 词：磁性超晶格 推迟模式 反铁磁交换相互作用 等效介质理论 磁性多层膜 

分 类 号：O484.43[理学—固体物理]