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Resonant magneto-acoustic switching: influence of Rayleigh wave frequency and wavevector

Abstract : We show on in-plane magnetized thin films that magnetization can be switched efficiently by 180 degrees using large amplitude Rayleigh waves travelling along the hard or easy magnetic axis. Large characteristic filament-like domains are formed in the latter case. Micromagnetic simulations clearly confirm that this multi-domain configuration is compatible with a resonant precessional mechanism. The reversed domains are in both geometries several hundreds of , much larger than has been shown using spin transfer torque- or field-driven precessional switching. We show that surface acoustic waves can travel at least 1 mm before addressing a given area, and can interfere to create magnetic stripes that can be positioned with a sub-micronic precision.
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Submitted on : Monday, June 11, 2018 - 4:06:40 PM
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P Kuszewski, I.S. Camara, N Biarrotte, L. Becerra, J. von Bardeleben, et al.. Resonant magneto-acoustic switching: influence of Rayleigh wave frequency and wavevector. Journal of Physics: Condensed Matter, IOP Publishing, 2018, 30 (24), pp.244003. ⟨10.1088/1361-648X/aac152⟩. ⟨hal-01812621⟩

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