含有衬底的双层复合薄膜的磁电效应  

Magnetoelectric Effect in Bilayer Composite Thin Films with Substrate

作　　者：郭红力[1] 李雪冬[1] 李海敏[1] 刘果[1] 肖定全[1] 朱建国[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610064

出　　处：《四川大学学报（工程科学版）》2011年第5期224-227,246,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(60771016)

摘　　要：建立了含有衬底的层状复合磁电薄膜的弹性力学模型,并简要推导了非理想耦合状态下的磁电双层膜的横向和纵向的磁电(ME)电压系数公式。计算了PMN-PT/CFO层状复合薄膜的磁电电压系数随压电相体积分数v、衬底的体积分数vs以及界面耦合系数k之间的变化关系。结果表明,衬底对磁电薄膜有着强烈的夹持效应。衬底的厚度、薄膜界面之间的耦合强度的大小以及合适的压磁/压电相体积比都对薄膜的磁电转换效应有一定的影响。A elasticity mechanical theory model for magnetoelectric bilayer laminated films with substrate was established.Using this model,the transverse and longitudinal magnetoelectric voltage coefficient formula of magnetoelectric films were derived in non-ideal interface coupling state simply.The magnetoelectric voltage coefficient of PMN-PT/CFO bilayer laminated films was calculated as the function of the volume fraction v of piezoelectrics,volume fraction vs of substrates and interface coupling coefficient k.It was found that the substrate has strong clamping effect to the magnetoelectric thin films.The thickness of substrate,quality of interface coupling and appropriated volume ratio of piezoelectrics/piezomagnetics have much effect on the magnetoelectric conversion in a certain extent.

关 键 词：磁电效应 磁电薄膜 耦合系数 

分 类 号：TM2[一般工业技术—材料科学与工程]