具有磁电效应的A类反铁磁系统的自旋波理论  

The spin wave in the A-type antiferromagnet with magnetoelectric effect

作　　者：仲崇贵[1] 陈新义[1] 蒋青 

机构地区：[1]苏州大学理学院物理系

出　　处：《苏州大学学报（自然科学版）》2002年第1期74-78,共5页Journal of Soochow University(Natural Science Edition)

摘　　要：自旋波理论通常用来研究低温下各类铁磁、反铁磁的磁性质 .运用自旋波理论 ,考虑外电场作用下产生的磁电效应 ,研究了A类反铁磁系统在主要高对称性方向的自旋波频谱以及由于磁电效应而发生的改变 .发现磁电效应电场的作用相当于一个虚构的磁场 。Spin-wave theory based on Heisenberg model is used to investigate the magnetic and magnetoelectric properties at a finite temperature in the A-type antiferromagnetic lattice,in which we consider that an applied electric field can generate a bulk magnetic moment. We have calculated the dispersion of the spin waves propagating in the highest symmetry direction andthose change because of the magnetoelectric effect with the external electric field. we found that the electric field is analogous to a fictitious magnetic field, and caused to split of the spin wave spectrum.

关 键 词：磁电效应 A类反铁磁体 自旋波 

分 类 号：O482.525[理学—固体物理]