INFLUENCE OF THE BONDING LAYER ON THE MAGNETOELECTRIC EFFECT IN MAGNETOSTRICTIVE-PIEZOELECTRIC STRUCTURES
The theory of the magnetoelectric effect in bilayer magnetostrictive-piezoelectric structure is presented considering the interlayer bonding material. Bilayer structure on the basis of nickel – lead zirconate-titanate bonded with epoxy glue is taken as a subject of research. Theoretical dependencies of the displacement in magnetostrictive and piezoelectric phases are presented over the thickness of the sample for different values of glue thickness. These dependencies have a nonlinear character, and their accounting leads to a noticeable contribution to the magnitude of the effect. The equation for frequency dependence of the magnetoelectric effect in the region of the electromechanical resonance is obtained, using the simultaneous solution of elastodynamic and electrostatic equations for the magnetostrictive, bonding and piezoelectric phases. The obtained expressions transform to the expressions for ideal connection between the layers in the passage to the limits, when the thickness of the glue tends to zero.