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Observation of Skyrmions at Room Temperature in Co2FeAl Heusler Alloy Ultrathin Film Heterostructures
Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India.
Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India.
SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Block JD,Sect 3, Kolkata 700106, India.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 1085Article in journal (Refereed) Published
Abstract [en]

Magnetic skyrmions are topological spin-textures having immense potential for energy efficient spintronic devices. Here, we report the observation of stable skyrmions in unpatterned Ta/Co2FeAl(CFA)/MgO thin film heterostructures at room temperature in remnant state employing magnetic force microscopy. It is shown that these skyrmions consisting of ultrathin ferromagnetic CFA Heusler alloy result from strong interfacial Dzyaloshinskii-Moriya interaction (i-DMI) as evidenced by Brillouin light scattering measurements, in agreement with the results of micromagnetic simulations. We also emphasize on room temperature observation of multiple skyrmions which can be stabilized for suitable combinations of CFA layer thickness, perpendicular magnetic anisotropy, and i-DMI. These results provide a significant step towards designing of room temperature spintronic devices based on skyrmions in full Heusler alloy based thin films.

Place, publisher, year, edition, pages
2019. Vol. 9, article id 1085
National Category
Condensed Matter Physics
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URN: urn:nbn:se:uu:diva-377339DOI: 10.1038/s41598-018-35832-3ISI: 000457287000073PubMedID: 30705297OAI: oai:DiVA.org:uu-377339DiVA, id: diva2:1291072
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Knut and Alice Wallenberg Foundation, KAW 2012.0031Available from: 2019-02-22 Created: 2019-02-22 Last updated: 2019-02-22Bibliographically approved

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