准2-2型磁电多层复合材料的磁电性能  

Magnetoelectric properties of multiferroic composites with pseudo 2-2 type multilayered structure

作　　者：马静[1] 施展[1] 林元华[1] 南策文[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《物理学报》2009年第8期5852-5856,共5页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2006AA03Z101);国家重点基础研究发展计划(批准号:2009CB623303);国家自然科学基金(批准号:50621201)资助的课题~~

摘　　要：用带底座的Pb(Zr,Ti)O3薄片阵列作为压电相,Terfenol-D粉末与树脂的混合物作为磁致伸缩相,灌注复合得到准2-2型磁电多层三相复合材料.研究了这种准2-2型多层结构在不同偏置磁场和不同角度下的磁电效应.其面内相互垂直的两个方向磁电电压系数分别在0.15和0.225T磁场下达到峰值,低频下分别为1.62×105V.m-1T-1和1.75×105V.m-1T-1;而在垂直于面内方向,低频下磁电系数仅有1.3×104V.m-1T-1,体现出显著的磁电各向异性.这种准2-2型磁电多层复合材料具有较好的交流磁场灵敏度,在谐振频率下可以探测到10-9T的交流磁场的变化.进行合适的设计和排列,可以探测空间磁场的大小和方向,有望应用于磁场传感器等领域.A pseudo 2-2 type multilayered magnetoelectric composite of Pb（Zr, Ti）O3 slice array （with base） and Terfenol-D/epoxy medium was prepared by the dice-and-fill technique. Obvious magnetoelectric anisotropy was observed in the pseudo 2-2 type composite, e. g., the magnetoelectric coefficients at low frequency were about （ 1.62×10^5V·m^-1T^-1 in the in-plane directions, but only 1.3× 10^4 V·m^-1T- 1 in the out-of-plane direction. The pseudo 2-2 type composite can detect AC magnetic field as small as 10-9 T under resonance drive. The magnetoelectric anisotropy and high magnetic field sensitivity make such pseudo 2-2 type multilayered magnetoelectric composites detect both direction and magnitude of magnetic field, which is of technological importance for applications as magnetic sensors.

关 键 词：磁电效应 多铁性 多层复合材料 

分 类 号：O482.5[理学—固体物理]