Abstract
This paper deals with the eddy current-induced magnetoelectric (ME) effect in a bi-layered structure consisting of a piezoelectric ceramic and a thermoplastic polyurethane (PU) film with three different values of Young’s modulus. It is observed a great effect of the elastic properties of the polymer on the magnetoelectric characteristics of the laminate samples.To study the influence of the elastic modulus (c) and damping coefficient (η) of the bilayers on the DC direct current magnetic induction (Bdc) induced piezomagnetic coefficient (λ) and magnetoelectric current magnitude (I), a model based on a forced damped elastic system has been developed to calculate c, η, the first and second complex magnetoelectric coefficient αp and βp for different samples. The effect of the polymer elastic modulus on the magnetoelectric response is presented and discussed. The calculated values of the I(Bdc) and S(Bdc) obtained with this model are in good agreement with experimental data. The optimal value of the effective ME voltage coefficient (αE t) was obtained for the stiffest polyurethane grade.
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