Creating and Deleting a Single Dipolar Skyrmion by Surface Spin Twists
We report deterministic operations on single dipolar skyrmions confined in nanostructured cuboids by using in-plane currents. We achieve highly reversible writing and deleting of skyrmions in a simple cuboid without any artificial defects or pinning sites. The current-induced creation of skyrmions is well-understood through the spin-transfer torque acting on surface spin twists of the spontaneous 3D ferromagnetic state, caused by the magnetic dipole-dipole interaction of the uniaxial Fe<sub>3</sub>Sn<sub>2</sub> magnet with a low-quality factor. Current-induced deletions of skyrmions result from the combined effects of magnetic hysteresis and Joule thermal heating. Our results are replicated consistently through 3D micromagnetic simulations. Our approach offers a viable method for achieving reliable single-bit operations in skyrmionic devices for applications such as random-access memories.
Authors
- Shouguo Wang (ORCID: https://orcid.org/0000-0002-4488-2645)
- Jin Tang (ORCID: https://orcid.org/0000-0001-7680-8231)
- Haifeng Du (ORCID: https://orcid.org/0000-0003-4263-5023)
- Lingyao Kong (ORCID: https://orcid.org/0000-0002-3047-4966)
- Yihao Wang (ORCID: https://orcid.org/0000-0002-4025-7551)
- Jialiang Jiang (ORCID: https://orcid.org/0000-0001-9636-3495)
- Yeong‐Ah Soh
- Yaodong Wu (ORCID: https://orcid.org/0000-0001-5952-7040)
- Yimin Xiong (ORCID: https://orcid.org/0000-0003-2736-8334)
- Mingliang Tian (ORCID: https://orcid.org/0000-0002-0870-995X)
- Junbo Li (ORCID: https://orcid.org/0000-0002-1566-0306)
Institutions
- Anhui University (CN)
- Hefei Normal University (CN)
- Chinese Academy of Sciences (CN)
- Paul Scherrer Institute (CH)
- Hefei Institutes of Physical Science (CN)
- High Magnetic Field Laboratory (CN)
- Advanced Materials and Devices (United States) (US)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-12-27
- DOI
- https://doi.org/10.1021/acs.nanolett.4c04606
- Citations
- 8
- Primary Topic
- Magnetic properties of thin films
- Type
- article
- Field-Weighted Citation Impact
- 2.70
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- China Postdoctoral Science Foundation
- Natural Science Fund for Distinguished Young Scholars of Shandong Province
- Natural Science Foundation of Anhui Province
- Young Scientists Fund
- National Key Research and Development Program of China