TbDyFe/PZT层状复合材料的磁电效应研究  

Magnetoelectric effect of the TbDyFe/PZT laminated composite

作　　者：万红[1] 谢立强[2] 吴学忠[2] 刘希从[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073 [2]国防科学技术大学机电工程与自动化学院,长沙410073

出　　处：《物理学报》2005年第8期3872-3877,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50375154)资助的课题.~~

摘　　要：磁致伸缩/压电复合材料通过磁致伸缩和压电效应的乘积而可以获得大的磁电效应.用磁控溅射方法制备了TbDyFe/PZT层状复合材料,实验测试了TbDyFe/PZT两层及TbDyFe/PZT/TbDyFe三层复合材料的磁电电压系数随周期磁场频率的变化关系,并采用有限元数值计算方法对两种材料的磁电电压系数进行了计算.研究结果表明,实验测试曲线与数值计算结果符合很好,所制备的层状复合材料在共振频率处存在最大的磁电电压系数值,由于两层板与三层板的振动模式不同,三层复合板的共振频率远高于两层复合板的共振频率.在非共振频率下,三层复合板的磁电转换效应高于两层复合板.有限元计算结果还显示,磁电层状复合材料的磁电电压系数随磁致伸缩层厚度的增加而增大.The great magnetoelectric (ME) effect is a product property of the composite consisting of individual piezoelectric and magnetostrictive phases. The TbDyFe/PZT laminate composites were prepared by magnetron sputtering, and the ME coefficients alpha(E) were examined experimentally and calculated by using a finite element analysis software. Results showed that the experimental data were in agreement with the calculated results and the value of alpha(E) reached the maximum at the resonance frequency, and aE increased with the increase of the magnetostricive thickness.

关 键 词：层状复合材料 TbDyFe PZT 效应研究 三层复合板 共振频率 磁致伸缩 压电复合材料 电压系数 三层复合材料 数值计算方法 计算结果 磁控溅射 磁电效应 压电效应 变化关系 实验测试 研究结果 测试曲线 振动模式 转换效应 有限元 

分 类 号：TB33[一般工业技术—材料科学与工程]