The Study Of Bias Magnetic Field Induced Anisotropic Magnetoelectric Response And Phase Shift Effect

The bias magnetic field induced anisotripic magnetoelectric(ME)response and phase shift effect were studied,conbined with investigating it's origin,which is to enhance ME effect,to explore it's underlying mechanism and to facilitate the ME composite into the application of magnetic vector sensors.It can promote the realization of the undistorted 180°ME phase shiftIn this work,the ME heterostructure were prepared with PMN-PT/NZFO and PZT-8/NZFO.The dynamic magneto-mechanical/mechanical-electric conversion process for two type of ME heterostructure were investigated by changing the orientation of bias magnetic field.The result show that the ME voltage coefficient(MEVC)in PMN-PT/NZFO is twice higher than that of PZT-8/NZFO?When the bias magnetic field HDC?460e,the maximum MEVC of 133.38V/cmOe were obtained at 0=0°,while under HDC>46Oe,the maximum MEVC were measured at ?=75°,with 115.3 V/cmOeFurthermore,the results demonstrate the HDC orientation induced dynamic piezomagnetic coefficient of NZFO can be responsible for the/HDC-orientation-dependent anisotropic ME response.Meanwhile,the effect of the anisotropic crystalline axial on a rectangular piezoelectric component due to dynamic strain can be neglected.Moreover,we investigated the HDC orientations control of ME response in bi-layered NZFO/PZT-8 laminate and dynamic piezomagnetic effect of NZFO,respectively,and the experiment data was analyzed with complex.Under the optimum bias magnetic field HDC=46Oe,the ME voltage coefficient with constant amplitude and but the disparate sign were obtained on Cole-Cole plot in the HDC direction angle of ?=0° and 180°,respectively,with+51.72V/cm Oe and-51.93V/cm Oe.the dynamic piezomagnetic coefficient variation is responsible for a undistorted 1800 phase reversal of ME voltage at resonance.These results can provide great possibilities in practical applications in magnetic field vector sensors,ME phase shifters and inverters.