2-2型PMNT/NFO复合磁电效应模拟  

Simulation on 2-2 Type PMNT /NFO Composite Magnetoelectric Effect

作　　者：杨焕银[1] 樊冬梅[1] 郭红力[1] 

机构地区：[1]长江师范学院凝聚态物理研究所,重庆涪陵408100

出　　处：《计算物理》2014年第5期587-592,共6页Chinese Journal of Computational Physics

基　　金：重庆市教委项目基金(KJ121317);长江师范学院科技项目基金(2012XJYB065)资助

摘　　要：利用弹性力学模型,基于铁电相与铁磁相的本构方程,建立磁电复合材料的本构方程,推导2-2型非理想耦合的磁电双层、三层复合薄膜的纵向、横向磁电(ME)电压系数.研究铁磁相材料铁酸镍(NFO)和铁电相材料铌镁酸铅-钛酸铅(PMNT)复合的磁电效应,分析复合材料的磁电电压系数与PMNT体积分数、界面耦合参数、两相体积比及复合总层数的关系.结果表明两相材料的性能、体积分数以及耦合系数、复合层数都影响磁电电压系数.In an elastic mechanics model,a magnetoelectric composites constitutive equation was established. Longitudinal and transverse ME voltage coefficient formulas of double-layer and three-layer composited thin films of 2-2 type in non-ideal condition were deduced with ferroelectric and magnetic constitutive equation. Composite ME voltage coefficient of ferromagnetic phase material nickel ferrite（ NFO） and ferroelectric phase material lead magnesium niobate-lead titanate（ PMNT） are studied. Relations between ME voltage coefficient and PMNT volume fraction,interface coupling parameters,two phase volume ratio and total number of layers are analyzed. It shows that performance of two phase material,appropriate volume fraction,coupling coefficient and total layer number are key to ME voltage coefficient.

关 键 词：磁电效应 耦合 复合材料 本构方程 

分 类 号：O482.5[理学—固体物理]