摘要
计入外磁场、体和界面单轴各向异性后，详细研究了铁磁或反铁磁层间耦合的自旋双链系统中的光学界面自旋波及其存在的充要条件．结果发现：对于不同的界面各向异性，该系统可以存在０、１和２个光学界面自旋波，其能量随铁磁层间耦合强度的增大而升高，却随反铁磁层间耦合强度的增大而降低．
The model of a ferromagnetic bichain,described by a Heisenberg Hamiltonian involving interactions between nearest neighbors,is investigated.Our theory holds for arbitrary exteral magnetic field,ferromagnetic or antiferromagnetic interface exchange coupling,and arbitrary easy axis unaxial volume and interface anisotropy.Exact conditions for the existence of Optical interface spin waves (OISW) are obtained.It has been found that under certain circumstances either 0,1 or 2 OISW may exist.The stronger the ferromagnetic interface coupling,the higher the energy of OISW,but the stronger the antiferromagnetic interface coupling,the lower the energy of OISW.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1997年第4期472-479,共8页
Journal of Inner Mongolia University：Natural Science Edition
基金
霍英东青年教师基金
内蒙古自然科学基金
关键词
光学界面自旋波
界面各向异性
多层膜
磁性
optical interface spin wave existence condition interface anisotropy interface coupling
