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arXiv · 2106.11114

Local non-linear excitation of sub-100 nm bulk-type spin waves by edge-localized spin waves in magnetic films

Pawel Gruszecki·Igor L. Lyubchanskii·Konstantin Y. Guslienko·Maciej Krawczyk
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Abstract

The excitation of high-frequency short-wavelength spin waves is a challenge limiting the application of these propagating magnetization disturbances in information processing systems. We propose a method of local excitation of the high-frequency spin waves using the non-linear nature of magnetization dynamics. We demonstrate with numeric simulations that an edge-localized spin wave can be used to excite plane waves propagating obliquely from the film's edge at a doubled frequency and over twice shorter in wavelength. The excitation mechanism is a direct result of the ellipticity of the magnetic moments precession that is related to the edge-mode propagation. As a consequence, the magnetization component tangential to the equilibrium orientation oscillates with doubled temporal and spatial frequencies, which leads to efficient excitation of the plane spin waves. Threshold-less non-linear process of short-wavelength spin-wave excitation proposed in our study is promising for integration with an inductive or point-like spin-torque source of edge spin waves.

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Pawel Gruszecki, Igor L. Lyubchanskii, Konstantin Y. Guslienko, Maciej Krawczyk. 2021-06-21. Local non-linear excitation of sub-100 nm bulk-type spin waves by edge-localized spin waves in magnetic films. https://doi.org/10.1063/5.0041030

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