Enhancement of resonant and non-resonant magnetoelectric coupling in multiferroic laminates with anisotropic piezoelectric properties

摘要

Giant transverse magnetoelectric voltage coefficients |α~_E| = 751 and 305 V/cmOe at two electromechanical antiresonance frequencies are found in the symmetric metglas/[011]-oriented 0.7Pb(Mg_1/3Nb_2/3)O₃–0.3PbTiO₃ crystal/metglas laminate. Unique torsional and diagonal vibration modes are identified to be responsible for those giant |α~_E| values. Moreover, α~_E is found to be anisotropic depending on the in-plane magnetic field directions, making the piezoelectrics with anisotropic planar piezoelectricity potentially useful base materials for multi-frequency, phase-sensitive magnetoelectric devices.