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|Title:||Efficient skyrmion transport mediated by a voltage controlled magnetic anisotropy gradient||Authors:||Wang, Xuan
Gan, Wei Liang
Martinez, J. C.
Tan, Fu Nan
Jalil, M. B. A.
Lew, Wen Siang
|Keywords:||Science::Physics||Issue Date:||2017||Source:||Wang, X., Gan, W. L., Martinez, J. C., Tan, F. N., Jalil, M. B. A., & Lew, W. S. (2018). Efficient skyrmion transport mediated by a voltage controlled magnetic anisotropy gradient. Nanoscale, 10(2), 733-740. doi:10.1039/c7nr06482a||Journal:||Nanoscale||Abstract:||Despite the inefficiencies associated with current-induced spin torques, they remain the predominant mode of skyrmion propulsion. In this work, we demonstrate numerically that skyrmions can be transported much more efficiently with a voltage-controlled magnetic anisotropy (VCMA) gradient. An analytical model was developed to understand the underlying skyrmion dynamics on a track under the VCMA conditions. Our calculations reveal that the repulsive skyrmion-edge interaction not only prevents the skyrmion from annihilating but also generates most of the skyrmion propulsion. A multiplexed array of gate electrodes can be used to create discrete anisotropy gradients over a long distance, leading to the formation of a series of translatable skyrmion potential wells. Due to the strong confining potentials, skyrmions are transported at a 70% higher packing density. Finally, we demonstrated that this form of skyrmion propulsion can also be implemented on almost any 2D geometry, providing improved versatility over current-induced methods.||URI:||https://hdl.handle.net/10356/141073||ISSN:||2040-3364||DOI:||10.1039/c7nr06482a||Rights:||© 2018 The Royal Society of Chemistry. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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