# Motion of skyrmions in nanowires driven by magnonic momentum-transfer forces

Zhang, Xichao; Müller, Jan; Xia, Jing; Garst, Markus; Liu, Xiaoxi; Zhou, Yan

##### Abstract:
We study the motion of magnetic skyrmions in a nanowire induced by a spin-wave current J flowing out of a driving layer close to the edge of the wire. By applying micromagnetic simulation and an analysis of the effective Thiele equation, we find that the skyrmion trajectory is governed by an interplay of both forces due to the magnon current and the wire boundary. The skyrmion is attracted to the driving layer and is accelerated by the repulsive force due to the wire boundary. We consider both cases of longitudinal and transverse driving to the nanowire, but a steady-state motion of the skyrmion is only obtained for a transverse magnon current. For the latter case, we find in the limit of low current densities J the velocity–current relation $v\sim J/\alpha$ where v is the skyrmion velocity and α is the Gilbert damping. For large J, in case of strong driving, the skyrmion is pushed into the driving layer, resulting in a drop in skyrmion velocity and, eventually, the destruction of the skyrmion.

 Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP) Publikationstyp Zeitschriftenaufsatz Publikationsjahr 2017 Sprache Englisch Identifikator ISSN: 1367-2630 KITopen-ID: 1000128934 Erschienen in New journal of physics Verlag IOP Publishing Band 19 Heft 6 Seiten Art.-Nr.: 065001 Vorab online veröffentlicht am 05.06.2017 Nachgewiesen in ScopusWeb of ScienceDimensions
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