Steady motion of 80-nm-size skyrmions in a 100-nm-wide track

Dongsheng Song (), Weiwei Wang, Shuisen Zhang, Yizhou Liu, Ning Wang, Fengshan Zheng, Mingliang Tian, Rafal E. Dunin-Borkowski, Jiadong Zang and Haifeng Du ()
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Dongsheng Song: Anhui University
Weiwei Wang: Anhui University
Shuisen Zhang: Chinese Academy of Sciences
Yizhou Liu: Chinese Academy of Sciences
Ning Wang: Chinese Academy of Sciences
Fengshan Zheng: Forschungszentrum Jülich
Mingliang Tian: Chinese Academy of Sciences
Rafal E. Dunin-Borkowski: Forschungszentrum Jülich
Jiadong Zang: University of New Hampshire
Haifeng Du: Anhui University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract The current-driven movement of magnetic skyrmions along a nanostripe is essential for the advancement and functionality of a new category of spintronic devices resembling racetracks. Despite extensive research into skyrmion dynamics, experimental verification of current-induced motion of ultra-small skyrmions within an ultrathin nanostripe is still pending. Here, we unveil the motion of individual 80 nm-size skyrmions in an FeGe track with an ultrathin width of 100 nm. The skyrmions can move steadily along the track over a broad range of current densities by using controlled pulse durations of as low as 2 ns. The potential landscape, arising from the magnetic edge twists in such a geometrically confined system, introduces skyrmion inertia and ensures efficient motion with a vanishing skyrmion Hall angle. Our results showcase the steady motion of skyrmions in an ultrathin track, offering a practical pathway for implementing skyrmion-based spintronic devices.

Date: 2024
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DOI: 10.1038/s41467-024-49976-6

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