Journal
ADVANCED MATERIALS
Volume 29, Issue 21, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201606178
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A magnetic skyrmion is a nanometer-scale magnetic vortex carrying an integer topological charge. Skyrmions show a promise for potential application in low-power-consumption and high-density memory devices. To promote their use in applications, it is attempted to control the existence of skyrmions using low electric currents at room temperature (RT). This study presents real-space observations for the current-induced formation and annihilation of a skyrmion lattice (SkL) as well as isolated skyrmions in a microdevice composed of a thin chiral magnet Co8Zn9Mn3 with a Curie temperature, T-C approximate to 325 K, above RT. It is found that the critical current for the manipulation of Bloch-type skyrmions is on the order of 10(8) A m(-2), approximately three orders of magnitude lower than that needed for the creation and drive of ferromagnetic (FM) domain walls in thin FM films. The in situ real-space imaging also demonstrates the dynamical topological transition from a helical or conical structure to a SkL induced by the flow of DC current, thus paving the way for the electrical control of magnetic skyrmions.
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