Double-peaked resonance in harmonic-free acoustically driven ferromagnetic resonance

The resonant interaction between surface acoustic waves and ferromagnetic thin films, a phenomenon known as acoustically driven ferromagnetic resonance (ADFMR), provides a way to control magnetic resonance with purely voltage excitation. However, devices have historically been operated at harmonic frequencies, leading to large insertion losses. In this work, we demonstrate a harmonic-free drive of ADFMR devices where the strain reaches very high...