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Control of morphology and formation of highly geometrically confined magnetic skyrmions
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2017 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, 15569Article in journal (Refereed) Published
Abstract [en]

The ability to controllably manipulate magnetic skyrmions, small magnetic whirls with particle-like properties, in nanostructured elements is a prerequisite for incorporating them into spintronic devices. Here, we use state-of-the-art electron holographic imaging to directly visualize the morphology and nucleation of magnetic skyrmions in a wedge-shaped FeGe nanostripe that has a width in the range of 45-150 nm. We find that geometrically-confined skyrmions are able to adopt a wide range of sizes and ellipticities in a nanostripe that are absent in both thin films and bulk materials and can be created from a helical magnetic state with a distorted edge twist in a simple and efficient manner. We perform a theoretical analysis based on a three-dimensional general model of isotropic chiral magnets to confirm our experimental results. The flexibility and ease of formation of geometrically confined magnetic skyrmions may help to optimize the design of skyrmion-based memory devices.

Place, publisher, year, edition, pages
Nature Publishing Group, 2017. Vol. 8, 15569
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-209297DOI: 10.1038/ncomms15569ISI: 000402751000001PubMedID: 28580935OAI: oai:DiVA.org:kth-209297DiVA: diva2:1111808
Funder
EU, European Research Council, 320832
Note

QC 20170619

Available from: 2017-06-19 Created: 2017-06-19 Last updated: 2017-06-19Bibliographically approved

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