We present an analytical model for power transfer in a magnetoelectric-film bulk-acoustic resonator (FBAR) comprising a piezoelectric-magnetostrictive bilayer. The model describes the power flow between the elastic and magnetic systems, quantifying the transduction efficiency when the FBAR operates as a magnetic transducer. By applying the model to example systems using piezoelectric $\mathrm{Sc}\mathrm{Al}\mathrm{N}$ and magnetostrictive $\mathrm{Co}\mathrm{Fe}\mathrm{B}$, $\mathrm{Ni}$, or Terfenol-D layers, we demonstrate the potential for achieving high efficiencies in magnetoelectric transducers, rendering them ideal for efficient ferromagnetic resonance excitation. The validity of the model’s assumptions is confirmed through comparison with a numerical finite-element resonator model in comsol. The finite-element model further enables a comprehensive study of the resonator’s dynamic behavior, including transient and steady-state regimes, and the identification of resonant frequencies within the system.

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• Magnetization dynamics
• Magnetoacoustic effect
• Magnetoelastic effect
• Magnetoelectric effect
• Magnetostriction
• Spintronics
• Magnetic multilayers
• Transducers