Electrical manipulation of skyrmions in a chiral magnet

Weiwei Wang, Dongsheng Song (), Wensen Wei, Pengfei Nan, Shilei Zhang, Binghui Ge, Mingliang Tian, Jiadong Zang () and Haifeng Du ()
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Weiwei Wang: Anhui University
Dongsheng Song: Anhui University
Wensen Wei: Chinese Academy of Sciences
Pengfei Nan: Anhui University
Shilei Zhang: ShanghaiTech University
Binghui Ge: Anhui University
Mingliang Tian: Chinese Academy of Sciences
Jiadong Zang: University of New Hampshire
Haifeng Du: Anhui University

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract Writing, erasing and computing are three fundamental operations required by any working electronic device. Magnetic skyrmions could be essential bits in promising in emerging topological spintronic devices. In particular, skyrmions in chiral magnets have outstanding properties like compact texture, uniform size, and high mobility. However, creating, deleting, and driving isolated skyrmions, as prototypes of aforementioned basic operations, have been a grand challenge in chiral magnets ever since the discovery of skyrmions, and achieving all these three operations in a single device is even more challenging. Here, by engineering chiral magnet Co8Zn10Mn2 into the customized micro-devices for in-situ Lorentz transmission electron microscopy observations, we implement these three operations of skyrmions using nanosecond current pulses with a low current density of about 1010 A·m−2 at room temperature. A notched structure can create or delete magnetic skyrmions depending on the direction and magnitude of current pulses. We further show that the magnetic skyrmions can be deterministically shifted step-by-step by current pulses, allowing the establishment of the universal current-velocity relationship. These experimental results have immediate significance towards the skyrmion-based memory or logic devices.

Date: 2022
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DOI: 10.1038/s41467-022-29217-4

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