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.Comment: 39 pages, 9 figures. This project has received funding from the
European Union's Horizon 2020 research and innovation program under grant
agreement No. 801055 "Spin Wave Computing for Ultimately-Scaled Hybrid
Low-Power Electronics" - CHIRO