摘要
为了适应器件的小型化、提高薄膜两相复合磁电材料的磁电效应,采用磁控溅射方法在Pb(Mg1/3Nb2/3)O3-PbTiO3(PMN-PT)衬底上生长FeCoV薄膜和Ni薄膜,形成FeCoV/PMN-PT/Ni薄膜复合结构。采用动态磁电系数测量系统对复合结构的磁电性能和共振频率进行了研究。结果表明:复合结构的磁电系数随直流偏置场的增加呈现先增加后减小的趋势,在约39.8kA/m附近达到峰值17.8×10-3 mV·cm-1·A·m-1,在31.84kA/m的直流偏置场下,磁电电压随着交流激励场强度的增加呈线性增加。复合结构在85.5kHz下具有一个明显的共振峰,在共振频率下,磁电性能提高5倍以上。
To improve the magnetoelectric （ME） property of piezoelectric thin film systems, Ni and FeCoV magnetic films are used to sandwich piezoelectric foil Pb（Mgl/3 Nbz/3 ）03-PbTiO3 （PMN-PT） in the middle. The ME voltages and coefficients have been characterized under a static magnetic field superimposed with an alternating magnetic field. The influences of the static and the alternating field strength are discussed. The peak ME coefficient obtained at 39.8 kA/m in the sandwiched structure reached 17.8 ~ 10-~ mV ~ cm-1 ~ A ~ m-1 , which is about five times greater than the Ni film-sandwiched counterpart. A linear relationship is observed between the magnetoelectric volt- age and the alternating field strength under a static field of 31.84 kA/m. Near the natural resonant frequency （ 85.5 kHz） of laminate, the ME effect were found to be dramatically increased, 5 times larger than the properties in low frequency.
出处
《金属功能材料》
CAS
2015年第3期1-5,共5页
Metallic Functional Materials
基金
国家自然科学基金资助项目(No.51301041)
关键词
磁电效应
磁致伸缩
共振频率
复合材料
magnetoelectric effect
magnetostrictive
resonant frequency
composites
