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PGI-1 Seminar: Dr. Bertrand Dupé

Skyrmion à la carte: Engineering magnetic skyrmions at transition-metal multilayers

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09 Dec 2015 11:30
venue
PGI Lecture Hall

Institute of Theoretical Physics and Astrophysics, Christian-Albrechts-Universität zu Kiel

Abstract:

Due to their unique topological and dynamical properties skyrmions in magnetic materials offer attractive perspectives for future spintronic applications. Recently, it has been discovered that magnetic skyrmions can also occur in ultra-thin transition metal films at surfaces. However, so far only skyrmions at interfaces with a single atomic layer of a magnetic material were reported, which greatly limits their potential for application in devices.

Here, we predict the emergence of skyrmions in [4d/Fe2/5d]n multilayers, i.e. structures composed of Fe biatomic layers sandwiched between 4d - and 5d -transition-metal layers. In these composite structures, the exchange and the Dzyaloshinskii- Moriya interactions, which control skyrmion formation, can be tuned separately by the two interfaces. This allows engineering skyrmions as shown by density functional theory and spin dynamics simulations.

Contact

Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Fax: +49 2461 61-2850
email: s.bluegel@fz-juelich.de