Magnetoelectric effect in thin film composites FeCoV/Pb(Mg1/3Nb2/3)O3-PbTiO3/Ni
FU Zhong-ze1, DU Zhao-fu2，DING Hui2,WANG Lei2, ZHANG Hong-ping2, ZHAO Dong-liang2
1.Tianjin Navigation Instrument Research Institute, Tianjin 300131, China 2.Functional Materials Research Institute, Central Iron & Steel Research Institute, Beijing 100081, China
Abstract：To improve the magnetoelectric (ME) property of piezoelectric thin film systems, Ni and FeCoV magnetic films are used to sandwich piezoelectric foil Pb(Mg1/3Nb2/3)O3-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. 8×10-3 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 voltage 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.
2015, Vol. 22 
