Antiskyrmions stabilized at interfaces by anisotropic Dzyaloshinskii-Moriya interactions

Markus Hoffmann (), Bernd Zimmermann, Gideon P. Müller, Daniel Schürhoff, Nikolai S. Kiselev, Christof Melcher and Stefan Blügel
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Markus Hoffmann: Forschungszentrum Jülich and JARA
Bernd Zimmermann: Forschungszentrum Jülich and JARA
Gideon P. Müller: Forschungszentrum Jülich and JARA
Daniel Schürhoff: Forschungszentrum Jülich and JARA
Nikolai S. Kiselev: Forschungszentrum Jülich and JARA
Christof Melcher: RWTH Aachen University
Stefan Blügel: Forschungszentrum Jülich and JARA

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract 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 C 2v symmetry are prototype classes of materials hosting magnetic antiskyrmions.

Date: 2017
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DOI: 10.1038/s41467-017-00313-0

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