Resonance magnetoelectric effect in radially polarized long cylindrical composite structures

Abstract

We proposed a theoretical model describing frequency response of magnetoelectric (ME) voltage coefficients in long cylindrical piezoelectric-magnetostrictive composite structures. Using constitutive equations of the materials and equation of motion, an expression for the ME voltage coefficient is derived in terms of material parameters characterizing piezoelectric and magnetostrictive phases and as a function of applied ac magnetic field frequency. It is shown that there is a considerable enhancement in ME voltage coefficient in the region of electromechanical resonance. The resonance frequency equation is obtained as a function of material parameters and geometry sizes. The relationship between resonance frequency and resonance ME effect with geometry size under different boundary mechanical conditions is investigated in trilayered and bilayered cylindrical composites using the derived model. This theoretical work is of some significance for designing ME devices and understanding the resonance vibration mode in cylindrical ME composite structures.