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Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets
- Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets
- Woo, Seonghoon; Litzius, Kai; Krueger, Benjamin; Im, Mi Young; Caretta, Lucas; Richter, Kornel; Mann, Maxwell; Krone, Andrea; Reeve, Robert M.; Weigand, Markus; Agrawal, Parnika; Lemesh, Ivan; Mawass, Mohamad-Assaad; Fischer, Peter; Klaeui, Mathias; Beach, Geo Rey S. D.
- Issue Date
- Nature Materials, 15(5), 501-+
- Article Type
- Energy Efficiency; Experimental Evidence; Ferromagnetic Materials; Ferromagnetism; Magnetic Levitation Vehicles; Magnetic Transmissions; Magnetism; Magnetoelectronics; Magnets; Metallic Ferromagnets; Motion of Individual; Skyrmion Lattices; Soft X-Ray Microscopy; Spintronic Device; Transition-Metal Ferromagnets; Transition-Metalss
- 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-1 as 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. © 2016 Macmillan Publishers Limited. All rights reserved.
- Nature Publishing Group
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