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Title: Visualizing the strongly reshaped skyrmion Hall effect in multilayer wire devices
Authors: Tan, Anthony K. C.
Ho, Pin
Lourembam, James
Huang, Lisen
Tan, Hang Khume
Reichhardt, Cynthia J. O.
Reichhardt, Charles
Soumyanarayanan, Anjan 
Issue Date: 12-Jul-2021
Publisher: Nature Research
Citation: Tan, Anthony K. C., Ho, Pin, Lourembam, James, Huang, Lisen, Tan, Hang Khume, Reichhardt, Cynthia J. O., Reichhardt, Charles, Soumyanarayanan, Anjan (2021-07-12). Visualizing the strongly reshaped skyrmion Hall effect in multilayer wire devices. Nature Communications 12 (1) : 4252. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Magnetic skyrmions are nanoscale spin textures touted as next-generation computing elements. When subjected to lateral currents, skyrmions move at considerable speeds. Their topological charge results in an additional transverse deflection known as the skyrmion Hall effect (SkHE). While promising, their dynamic phenomenology with current, skyrmion size, geometric effects and disorder remain to be established. Here we report on the ensemble dynamics of individual skyrmions forming dense arrays in Pt/Co/MgO wires by examining over 20,000 instances of motion across currents and fields. The skyrmion speed reaches 24 m/s in the plastic flow regime and is surprisingly robust to positional and size variations. Meanwhile, the SkHE saturates at ?22?, is substantially reshaped by the wire edge, and crucially increases weakly with skyrmion size. Particle model simulations suggest that the SkHE size dependence — contrary to analytical predictions — arises from the interplay of intrinsic and pinning-driven effects. These results establish a robust framework to harness SkHE and achieve high-throughput skyrmion motion in wire devices. © 2021, The Author(s).
Source Title: Nature Communications
ISSN: 2041-1723
DOI: 10.1038/s41467-021-24114-8
Rights: Attribution 4.0 International
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