Excitation of the Gyrotropic Mode in a Magnetic Vortex by Time-Varying Strain

2023/11/30 by Vadym Iurchuk, Jürgen Lindner, Iurchuk, Vadym +5 · 1 citation
Engineering · Materials Science · #Applied Physics (physics.app-ph) #Electromagnetic Effects on Materials #FOS: Physical sciences #Magnetic Properties and Applications #Magneto-Optical Properties and Applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

paper · pdf · doi:10.48550/arxiv.2311.18517

openalex publication_date 2023/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate excitation of the gyrotropic mode in a magnetostrictive vortex by time-varying strain. The vortex dynamics is driven by a time-varying voltage applied to the piezoelectric substrate and detected electrically by spin rectification at subthreshold values of rf current. When the frequency of the time-varying strain matches the gyrotropic frequency at given in-plane magnetic field, the strain-induced in-plane magnetic anisotropy leads to a resonant excitation of the gyration dynamics in a magnetic vortex. We show that nonlinear gyrotropic dynamics can be excited already for moderate amplitudes of the time-varying strain.

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