Bloch chirality induced by an interlayer Dzyaloshinskii-Moriya interaction in ferromagnetic multilayers

Title
Bloch chirality induced by an interlayer Dzyaloshinskii-Moriya interaction in ferromagnetic multilayers
Authors
김경환Shawn D. PollardJoseph A. GarlowShaobo ChengKaiming CaiYimei ZhuHyunsoo Yang
Keywords
Dzyaloshinskii-Moriya interaction
Issue Date
2020-11
Publisher
Physical review letters
Citation
VOL 125, NO 22-227203
Abstract
Chiral spin textures stabilized by the interfacial Dzyaloshinkii-Moriya interaction, such as skyrmions and homochiral domain walls, have been shown to exhibit qualities that make them attractive for their incorporation in a variety of spintronic devices. However, for thicker multilayer films, mixed textures occur in which an achiral Bloch component coexists with a chiral N?el component of the domain wall to reduce the demagnetization field at the film surface. We show that an interlayer Dzyaloshinkii-Moriya interaction can break the degeneracy between Bloch chiralities. We further find large population asymmetries and chiral branching in the Bloch component of the domain walls in well-ordered Co/Pd multilayers. This asymmetry is a result of the combined effect of the demagnetization field and an interlayer Dzyaloshinkii-Moriya interaction, and is strongly related to film thickness and structural ordering. This work paves the way toward the utilization of this effect toward controlling Bloch chirality in magnetic multilayers.
URI
http://pubs.kist.re.kr/handle/201004/72332
ISSN
0031-9007
Appears in Collections:
KIST Publication > Article
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