Shape demagnetization effect on layered magnetoelectric composites  

作　　者：PAN DeAn LU Jun BAI Yang CHU WuYang QIAO LiJie 

机构地区：[1]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Chinese Science Bulletin》2008年第14期2124-2128,共5页

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 50572006);the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT 0509)

摘　　要：Magnetoelectric (ME) voltage coefficient of plate layered magnetostrictive-piezoelectric composites was always considered independent of the in-plane size due to the oversimplification in ME theoretical models. Here we report that the ME voltage coefficient depends on the in-plane size owing to shape demagnetization effect on magnetostriction. Both theoretical analysis and experimental results indicate that ME voltage coefficient of layered ME composites changes with the variation in in-plane sizes (length and width). ME coefficient increases with a rise in in-plane sizes, and different aspect ratio also results in different ME coefficients. Proper design of in-plane shape will greatly promote the develop- ment of ME devices.Magnetoelectric （ME） voltage coefficient of plate layered magnetostricUve-piezoelectric composites was always considered independent of the in-plane size due to the oversimplification in ME theoretical models. Here we report that the ME voltage coefficient depends on the in-plane size owing to shape demagnetization effect on magnetostriction. Both theoretical analysis and experimental results indicate that ME voltage coefficient of layered ME composites changes with the variation in in-plane sizes （length and width）. ME coefficient increases with a rise in in-plane sizes, and different aspect ratio also results in different ME coefficients. Proper design of in-plane shape will greatly promote the development of ME devices.

关 键 词：型状退磁 磁致伸缩 磁电效应 电磁复合材料 

分 类 号：TB33[一般工业技术—材料科学与工程]