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arXiv · 2311.18517

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

Vadym Iurchuk·Jürgen Lindner·Jürgen Fassbender·Attila Kákay
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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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Vadym Iurchuk, Jürgen Lindner, Jürgen Fassbender, Attila Kákay. 2023-11-30. Excitation of the Gyrotropic Mode in a Magnetic Vortex by Time-Varying Strain. https://arxiv.org/abs/2311.18517

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