Spin Wave Emission in Field-Driven Domain Wall Motion
arXiv:1409.3286 · doi:10.1103/PhysRevB.90.184415
Abstract
A domain wall (DW) in a nanowire can propagate under a longitudinal magnetic field by emitting spin waves (SWs). We numerically investigated the properties of SWs emitted by the DW motion, such as frequency and wavenumber, and their relation with the DW motion. For a wire with a low transverse anisotropy and in a field above a critical value, a DW emits SWs to both sides (bow and stern), while it oscillates and propagates at a low average speed. For a wire with a high transverse anisotropy and in a weak field, the DW emits mostly stern waves, while the DW distorts itself and DW center propagates forward like a drill at a relative high speed.
6 pages, 5 figures
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- On the speed of domain walls in thin nanotubes: the transition from the linear to the magnonic regime
- Current-induced instability of domain walls in cylindrical nanowires
- Spin wave resonance in yttrium iron garnet stripe domains
- Domain wall dynamics for an in-plane magnetized thin film with large perpendicular hard axis anisotropy including Dzyaloshinskii-Moriya interaction