Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets
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Author(s)
Litzius, Kai
Krüger, Benjamin
Im, Mi-Young
Richter, Kornel
Krone, Andrea
Reeve, Robert M.
Weigand, Markus
Lemesh, Ivan
Mawass, Mohamad-Assaad
Fischer, Peter
Date Issued
February 2016
Journal
Nature Materials
Publisher
Springer Nature
Citation
Woo, Seonghoon et al. “Observation of Room-Temperature Magnetic Skyrmions and Their Current-Driven Dynamics in Ultrathin Metallic Ferromagnets.” Nature Materials 15, 5 (February 2016): 501–506 © 2016 Macmillan Publishers Limited
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Author's final manuscript
Abstract
Magnetic skyrmions are topologically protected spin textures that exhibit fascinating physical behaviours and large potential in highly energy-efficient spintronic device applications. The main obstacles so far are that skyrmions have been observed in only a few exotic materials and at low temperatures, and fast current-driven motion of individual skyrmions has not yet been achieved. Here, we report the observation of stable magnetic skyrmions at room temperature in ultrathin transition metal ferromagnets with magnetic transmission soft X-ray microscopy. We demonstrate the ability to generate stable skyrmion lattices and drive trains of individual skyrmions by short current pulses along a magnetic racetrack at speeds exceeding 100 m s-1as required for applications. Our findings provide experimental evidence of recent predictions and open the door to room-temperature skyrmion spintronics in robust thin-film heterostructures.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/NMAT4593
