The phenomenon of even bulk mode variance in a ferromagnetic A-A bilayer system  

作　　者：周文平 云国宏 梁希侠 

机构地区：[1]Laboratory of Solid State Physics,Department of Physics,Inner Mongolia University [2]Department of Physics,Inner Mongolia Normal University

出　　处：《Chinese Physics B》2009年第12期5496-5500,共5页中国物理B（英文版）

基　　金：Project supported by the Foundation for Key Program of Ministry of Education,China (Grant No 206024);National Natural Science Foundation of China (Grant No 10762001);Program for New Century Excellent Talents in University of China (Grant NoNCET-05-0272);the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No 20040126003);Natural Science Foundation of Inner Mongolia Autonomous Region,China (Grant No 200711020109)

摘　　要：The eigenprobtems of spin waves in a symmetrical ferromagnetic bilayered system with periodic boundary conditions are solved using the interface-rescaling approach （IRA）. The results show that interface coupling between two sublayers would not change the excitation energy of odd bulk modes, but change excitation energy of even bulk modes. We call this peculiar phenomenon the phenomenon of even bulk mode variance （PEBMV）. There are two kinds of mechanisms which cause PEBMV： phase reversal and phase translation of the magnon at the interface, corresponding, respectively, to the antiferromagnetic and ferromagnetic interface coupling cases. PEBMV embodies the selective effect of the interface on different bulk magnons.The eigenprobtems of spin waves in a symmetrical ferromagnetic bilayered system with periodic boundary conditions are solved using the interface-rescaling approach （IRA）. The results show that interface coupling between two sublayers would not change the excitation energy of odd bulk modes, but change excitation energy of even bulk modes. We call this peculiar phenomenon the phenomenon of even bulk mode variance （PEBMV）. There are two kinds of mechanisms which cause PEBMV： phase reversal and phase translation of the magnon at the interface, corresponding, respectively, to the antiferromagnetic and ferromagnetic interface coupling cases. PEBMV embodies the selective effect of the interface on different bulk magnons.

关 键 词：spin waves magnetic multilayer MAGNON 

分 类 号：O482.5[理学—固体物理] TG111.92[理学—物理]