Power transfer in magnetoelectric resonators

TL;DR

This paper develops an analytical model to understand power transfer in magnetoelectric resonators, accounting for magnetostrictive effects and enabling calculation of energy efficiency in such devices.

Contribution

It introduces a novel analytical model that captures the magnetostrictive influence on elastodynamics in magnetoelectric resonators, facilitating power and efficiency calculations.

Findings

Model accurately predicts power absorption in resonators.

Application to specific material systems demonstrates practical relevance.

Provides insights into optimizing magnetoelectric transducer performance.

Abstract

We derive an analytical model for the power transfer in a magnetoelectric film bulk acoustic resonator consisting of a piezoelectric--magnetostrictive bilayer. The model describes the dynamic magnetostrictive influence on the elastodynamics via an effective frequency-dependent stiffness constant. This allows for the calculation of both the magnetic and elastic power absorption in the resonator as well as of its energy efficiency when such a resonator is considered as a magnetic transducer. The model is then applied to example systems consisting of piezoelectric ScAlN and magnetostrictive CoFeB, Ni, or Terfenol-D layers.