Spin-motive force induced by standing spin waves under nonlinear magnon scattering in a permalloy strip is investigated numerically. When the power of an applied microwave field is increased above a threshold under ferromagnetic resonance, spin waves with finite wave numbers are excited via four-magnon scattering, leading to standing spin waves in real space. We calculate the spin-motive force induced by the spin waves with finite wave numbers in a permalloy strip and estimate the electric voltage due to the spin-motive force. We demonstrate the increase of electric voltage as a result of steep magnetization modulation of the nonlinearly excited spin waves and the nonlinear spin waves produced.

• Received 11 February 2024
• Revised 1 May 2024
• Accepted 17 May 2024

DOI:https://doi.org/10.1103/PhysRevApplied.21.064057