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arXiv · 1706.02709

Equations of Motion and Frequency Dependence of Magnon-Induced Domain Wall Motion

Vetle Risinggård·Erlend Grytli Tveten·Arne Brataas·Jacob Linder
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Abstract

Spin waves can induce domain wall motion in ferromagnets. We derive the equations of motion for a transverse domain wall driven by spin waves. Our calculations show that the magnonic spin-transfer torque does not cause rotation-induced Walker breakdown. The amplitude of spin waves that are excited by a localized microwave field depends on the spatial profile of the field and the excitation frequency. By taking this frequency dependence into account, we show that a simple one-dimensional model may reproduce much of the puzzling frequency dependence observed in early numerical studies.

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Vetle Risinggård, Erlend Grytli Tveten, Arne Brataas, Jacob Linder. 2017-12-01. Equations of Motion and Frequency Dependence of Magnon-Induced Domain Wall Motion. https://doi.org/10.1103/physrevb.96.174441

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