Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films

25 Feb 2015  ·  Woo Seonghoon, Litzius Kai, Krüger Benjamin, Im Mi-Young, Caretta Lucas, Richter Kornel, Mann Maxwell, Krone Andrea, Reeve Robert, Weigand Markus, Agrawal Parnika, Fischer Peter, Kläui Mathias, Beach Geoffrey S. D. ·

Magnetic skyrmions are topologically-protected spin textures that exhibit fascinating physical behaviors 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 manipulation 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. Our findings provide experimental evidence of recent predictions and open the door to room-temperature skyrmion spintronics in robust thin-film heterostructures. read more

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Materials Science