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Stability and dynamics of magnetic skyrmions in FM/AFM heterostructures
School of Science and Technology, Örebro University, SE-701 82, Örebro, Sweden.
KTH, School of Engineering Sciences (SCI), Applied Physics, Light and Matter Physics.ORCID iD: 0000-0003-1661-9572
Department of Physics and Astronomy, Uppsala University, SE-75120, Uppsala, Sweden.
KTH, School of Engineering Sciences (SCI), Applied Physics. KTH, Centres, SeRC - Swedish e-Science Research Centre. (Wallenberg Initiative Materials Science for Sustainability (WISE))ORCID iD: 0000-0001-7788-6127
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2024 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 110, no 10, article id 104430Article in journal (Refereed) Published
Abstract [en]

Magnetic skyrmions have garnered attention for their potential roles in spintronic applications, such as information carriers in computation, data storage, and nano-oscillators due to their small size, topological stability, and the requirement of small electric currents to manipulate them. Two key challenges in harnessing skyrmions are the stabilization requirement through a strong out-of-plane field, and the skyrmion Hall effect (SkHE). Here, we present a systematic model study of skyrmions in ferromagnetic/antiferromagnetic (FM/AFM) multilayer structures by employing both atomistic Monte Carlo and atomistic spin dynamics simulations. We demonstrate that skyrmions stabilized by exchange bias have superior stability to field-stabilized skyrmions due to the formation of a magnetic imprint within the AFM layer. Additionally, stacking two skyrmion hosting FM layers between two AFM layers suppresses the SkHE and enables the transport of AFM-coupled skyrmions with high velocity in the order of a few km/s. This proposed multilayer configuration could serve as a pathway to overcome existing limitations in the development of skyrmion-based devices, and the insights obtained through this study contribute significantly to the broader understanding of topological spin textures in magnetic materials.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2024. Vol. 110, no 10, article id 104430
National Category
Condensed Matter Physics
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URN: urn:nbn:se:kth:diva-354638DOI: 10.1103/PhysRevB.110.104430ISI: 001327335800002Scopus ID: 2-s2.0-85205291603OAI: oai:DiVA.org:kth-354638DiVA, id: diva2:1904534
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QC 20241024

Available from: 2024-10-09 Created: 2024-10-09 Last updated: 2024-10-24Bibliographically approved

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Lu, ZhiweiDelin, Anna

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