磁电薄膜与微波作用研究  

Magnetoelectric film under interaction of microwave

作　　者：郑鸿[1] 杨成韬[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《物理学报》2010年第7期5055-5060,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:61363Z)资助的课题~~

摘　　要：建立了双层磁电复合薄膜模型,当磁电材料尺寸可以与微波波长相比拟时,微波在传播方向上的偏导不为零,得到了微波与磁电材料作用的非齐次偏微分方程,并在谐振条件下对该方程进行了解析求解.推导出磁电系数和材料等效电学参数的解析表达式,结果表明磁电材料的磁电系数多出相关的耦合项,其大小不但与材料本身参数有关,还与微波在材料中的波速有关;等效导纳多出的耦合项与微波的频率有关.The bilayered magnetoelectric composite model has been analyzed.The non-homogeneous partial differential equation of the magnetoelectric material interacting with the microwave has been obtained in the condition that the partial derivative of the microwave is non-zero along the transmitting direction when the size of the magnetoelectric material is comparable with the wavelength.The analytic solution is solved for the equation at resonant condition,and then the analytic expressions of the magnetoelectric coefficient and the equivalent electric parameters are calculated.The results show that there is a correlative coupling term in excess in the magnetoelectric coefficient,the magnitude of which is related not only to the material parameters,but also to the microwave＇s velocity in the material,and the equivalent admittance is related to the microwave＇s frequency.

关 键 词：磁电薄膜 微波 非齐次偏微分方程 

分 类 号：O484.43[理学—固体物理]