Universität zu Köln

Mueller, Jan, Rosch, Achim ORCID: 0000-0002-6586-5721 and Garst, Markus ORCID: 0000-0001-5390-3316 (2016). Edge instabilities and skyrmion creation in magnetic layers. New J. Phys., 18. BRISTOL: IOP PUBLISHING LTD. ISSN 1367-2630

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Abstract

We study both analytically and numerically the edge of two-dimensional ferromagnets with Dzyaloshinskii-Moriya (DM) interactions, considering both chiral magnets and magnets with interface-induced DM interactions. We show that in the field-polarized (FP) ferromagnetic phase magnon states exist which are bound to the edge, and we calculate their spectra within a continuum field theory. Upon lowering an external magnetic field, these bound magnons condense at a finite momentum and the edge becomes locally unstable. Micromagnetic simulations demonstrate that this edge instability triggers the creation of a helical phase which penetrates the FP state within the bulk. A subsequent increase of the magnetic field allows to create skyrmions close to the edge in a controlled manner.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Mueller, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosch, Achim UNSPECIFIED orcid.org/0000-0002-6586-5721 UNSPECIFIED Garst, Markus UNSPECIFIED orcid.org/0000-0001-5390-3316 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-272285
DOI:	10.1088/1367-2630/18/6/065006
Journal or Publication Title:	New J. Phys.
Volume:	18
Date:	2016
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1367-2630
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ROOM-TEMPERATURE; CHIRAL MAGNET; DYNAMICS; LATTICE; STABILITY; CRYSTALS; GEOMETRY; CHAIN; MNSI Multiple languages Physics, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27228