Resonance enhancement of piezoelectric, dielectric, and magnetoelectric characteristics of inhomogeneous multiferroics in alternating electric field

摘要

A resonance piezoelectric effect in a multilayer ceramic composite has been studied. Expressions for the effective dielectric permittivity and piezoelectric coefficient of the layered composite are obtained. It is shown that, in the vicinity of the piezoelectric resonance frequency, the effective response of the composite to an external action can be significantly enhanced. The behavior of the ferromagnet-piezoelectric composite is described with allowance for spatial oscillations of the electric and magnetic field. Transversal piezomodulus, magnetoelectric susceptibility, and dielectric permittivity of layered multiferroics are considered.