Universität zu Köln

Zhang, Xichao ORCID: 0000-0001-9656-9696, Mueller, Jan, Xia, Jing, Garst, Markus ORCID: 0000-0001-5390-3316, Liu, Xiaoxi ORCID: 0000-0001-5917-5495 and Zhou, Yan ORCID: 0000-0001-5641-9191 (2017). Motion of skyrmions in nanowires driven by magnonic momentumtransfer forces. New J. Phys., 19. BRISTOL: IOP PUBLISHING LTD. ISSN 1367-2630

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Abstract

Westudy 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. Weconsider 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 similar to J/alpha where v is the skyrmion velocity and a 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhang, Xichao UNSPECIFIED orcid.org/0000-0001-9656-9696 UNSPECIFIED Mueller, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Xia, Jing UNSPECIFIED UNSPECIFIED UNSPECIFIED Garst, Markus UNSPECIFIED orcid.org/0000-0001-5390-3316 UNSPECIFIED Liu, Xiaoxi UNSPECIFIED orcid.org/0000-0001-5917-5495 UNSPECIFIED Zhou, Yan UNSPECIFIED orcid.org/0000-0001-5641-9191 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-230150
DOI:	10.1088/1367-2630/aa6b70
Journal or Publication Title:	New J. Phys.
Volume:	19
Date:	2017
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1367-2630
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MAGNETIC SKYRMIONS; DYNAMICS; RACETRACK; MEMORY; NANOSTRUCTURES; CONVERSION; GEOMETRY; CRYSTAL; LATTICE Multiple languages Physics, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23015