%0 Journal Article
%T Effect of optical phonon on magnetic excitation of two-dimensional Heisenberg ferromagnetic system<br>光频支声子对二维Heisenberg铁磁系统磁激发的影响
%A Cheng Tai-Min
%A Xianyu Ze
%A Gang Tie-Chen
%A <br>成泰民
%A 鲜于泽
%A 江铁臣
%J 物理学报
%D 2006
%I 
%X A magnon-phonon interaction model is built in the two-dimensional double square ferromagnetic system. By using Matsubara Green function theory, we study magnetic excitation of the system, and calculate the magnon dispersion curve on the main symmetric points and lines in the Brillouin zone. The influences of optical phonon and acoustic phonon on the magnetic excitation of the system are compared, and the influences of the parameter change on the magnon softening are also studied. It is concluded that the coupling of the optical phonon and magnon has predominant effect on the magnon softening, especially the longitudinal optical phonon has the greatest effect on the magnon softening, and the effect of nonmagnetic ion on magnon softening is stronger than that of magnetic ion.
%K magnon-phonon interaction
%K magnon softening
%K magnetic excitation
%K optical phonon
%K ferromagnetic system<br>磁振子-声子相互作用
%K 磁振子软化
%K 磁激发
%K 光频支声子
%K 铁磁系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=1868700C29E787C2&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=B31275AF3241DB2D&sid=17981ADD469CC23A&eid=EE8AB80B3B3CC3AC&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=16