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Edge instabilities and skyrmion creation in magnetic layers

Müller, Jan; Rosch, Achim; Garst, Markus

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.

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Originalveröffentlichung
DOI: 10.1088/1367-2630/18/6/065006
Scopus
Zitationen: 49
Web of Science
Zitationen: 48
Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1367-2630
KITopen-ID: 1000128943
Erschienen in New journal of physics
Verlag IOP Publishing
Band 18
Heft 6
Seiten Art.-Nr.: 065006
Vorab online veröffentlicht am 13.06.2016
Nachgewiesen in Web of Science
Scopus
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