Driving an electron spin vortex "Skyrmion" with a microcurrent

RIKEN and the National Institute for Materials Science (NIMS) have succeeded in forming a skyrmion crystal in which electron spin is aligned in a vortex shape in a microdevice using the helimagnet FeGe. The skyrmion crystal is driven with an ultra-low current density less than 1/100,000 that of the current necessary to drive magnetic domain walls in ferromagnets. This research lays the groudwork for technology that manipulates the states of magnetic information media with extremely low power consumption.

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