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Antiskyrmions stabilized at interfaces by anisotropic Dzyaloshinskii-Moriya interactions

Antiskyrmions stabilized at interfaces by anisotropic Dzyaloshinskii-Moriya interactions


Titill: Antiskyrmions stabilized at interfaces by anisotropic Dzyaloshinskii-Moriya interactions
Höfundur: Hoffmann, Markus
Zimmermann, Bernd
Müller, Gideon Philipp   orcid.org/0000-0001-8684-9627
Schürhoff, Daniel
Kiselev, Nikolai S.
Melcher, Christof
Blügel, Stefan
Útgáfa: 2017-08-21
Tungumál: Enska
Umfang: 308
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Raunvísindastofnun (HÍ)
Science Institute (UI)
Birtist í: Nature Communications;8(1)
ISSN: 2041-1723
DOI: 10.1038/s41467-017-00313-0
Efnisorð: Magnetic properties and materials; Spintronics; Surfaces, interfaces and thin films; Segulmagn; Hreyfifræði
URI: https://hdl.handle.net/20.500.11815/564

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Tilvitnun:

Hoffmann, M., Zimmermann, B., Müller, G. P., Schürhoff, D., Kiselev, N. S., Melcher, C., & Blügel, S. (2017). Antiskyrmions stabilized at interfaces by anisotropic Dzyaloshinskii-Moriya interactions. Nature Communications, 8(1), 308. doi:10.1038/s41467-017-00313-0

Útdráttur:

Chiral magnets are an emerging class of topological matter harboring localized and topologically protected vortex-like magnetic textures called skyrmions, which are currently under intense scrutiny as an entity for information storage and processing. Here, on the level of micromagnetics we rigorously show that chiral magnets can not only host skyrmions but also antiskyrmions as least energy configurations over all non-trivial homotopy classes. We derive practical criteria for their occurrence and coexistence with skyrmions that can be fulfilled by (110)-oriented interfaces depending on the electronic structure. Relating the electronic structure to an atomistic spin-lattice model by means of density functional calculations and minimizing the energy on a mesoscopic scale by applying spin-relaxation methods, we propose a double layer of Fe grown on a W(110) substrate as a practical example. We conjecture that ultra-thin magnetic films grown on semiconductor or heavy metal substrates with C2v symmetry are prototype classes of materials hosting magnetic antiskyrmions.

Leyfi:

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