Mirroring Skyrmions in Synthetic Antiferromagnets via Modular Design
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AbstractSkyrmions are promising for the next generation of spintronic devices, which involves the production and transfer of skyrmions. The creation of skyrmions can be realized by a magnetic field, electric field, or electric current while the controllable transfer of skyrmions is hindered by the skyrmion Hall effect. Here, we propose utilizing the interlayer exchange coupling induced by the Ruderman–Kittel–Kasuya–Yoshida interactions to create skyrmions through hybrid ferromagnet/synthetic antiferromagnet structures. An initial skyrmion in ferromagnetic regions could create a mirroring skyrmion with an opposite topological charge in antiferromagnetic regions driven by the current. Furthermore, the created skyrmions could be transferred in synthetic antiferromagnets without deviations away from the main trajectories due to the suppression of the skyrmion Hall effect in comparison to the transfer of the skyrmion in ferromagnets. The interlayer exchange coupling can be tuned, and the mirrored skyrmions can be separated when they reach the desired locations. Using this approach, the antiferromagnetic coupled skyrmions can be repeatedly created in hybrid ferromagnet/synthetic antiferromagnet structures. Our work not only supplies a highly efficient approach to create isolated skyrmions and correct the errors in the process of skyrmion transport, but also paves the way to a vital information writing technique based on the motion of skyrmions for skyrmion-based data storage and logic devices.
CitationDeng, P., Zhuo, F., Li, H., & Cheng, Z. (2023). Mirroring Skyrmions in Synthetic Antiferromagnets via Modular Design. Nanomaterials, 13(5), 859. https://doi.org/10.3390/nano13050859
SponsorsThis research was funded by the National Natural Science Foundation of China (grant number 11804078), the Postdoctoral International Exchange Program of China, Grant No. YJ20220302 and the Australian Research Council (ARC) (grant number DP190100150). Hang Li and Panluo Deng were supported by National Natural Science Foundation of China (grant number 11804078). Fengjun Zhuo was supported by the Postdoctoral International Exchange Program of China (Grant No. YJ20220302) and the Double First-class Initiative Fund of ShanghaiTech University and acknowledges support from the Postdoctoral International Exchange Program of China (No. YJ20220302) and King Abdullah University of Science and Technology (KAUST). Hang Li acknowledges support from KAUST at the beginning of his career. Zhenxiang Cheng was supported by the Australian Research Council (ARC) (grant number DP190100150). The authors thank Tania Silver (University of Wollongong) for reading the manuscript and polishing the English in this paper.
PubMed Central IDPMC10004772