Equations of motion and frequency dependence of magnon-induced domain wall motion
Journal article, Peer reviewed
Published version
Permanent lenke
http://hdl.handle.net/11250/2475676Utgivelsesdato
2017Metadata
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- Institutt for fysikk [2701]
- Publikasjoner fra CRIStin - NTNU [38525]
Originalversjon
10.1103/PhysRevB.96.174441Sammendrag
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.