Controlling magnetic skyrmion nucleation with Ga+ ion irradiation
| Autor: | Mark C. H. de Jong, Bennert H. M. Smit, Mariëlle J. Meijer, Juriaan Lucassen, Henk J. M. Swagten, Bert Koopmans, Reinoud Lavrijsen |
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| Přispěvatelé: | Physics of Nanostructures, Applied Physics and Science Education, EIRES, ICMS Affiliated, Center for Care & Cure Technology Eindhoven, Eindhoven Hendrik Casimir institute |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Physical Review B, 107(9):094429. American Physical Society |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/PhysRevB.107.094429 |
| Popis: | In this paper, we show that magnetic skyrmion nucleation can be controlled using Ga+ ion irradiation, which manipulates the magnetic interface effects (in particular the magnetic anisotropy and Dzyaloshinskii-Moriya interaction) that govern the stability and energy cost of skyrmions in thin film systems. We systematically and quantitatively investigated what effect these changes have on the nucleation of magnetic skyrmions. Our results indicate that the energy cost of skyrmion nucleation can be reduced up to 26% in the studied dose range and that it scales approximately linearly with the square root of the domain-wall energy density. Moreover, the total number of nucleated skyrmions in irradiated devices after nucleation was found to depend linearly on the ion dose and could be doubled compared to nonirradiated devices. These results show that ion irradiation cannot only be used to enable local nucleation of skyrmions, but that it also allows for fine control of the threshold and efficiency of the nucleation process. Comment: Main: 17 pages, 3 figures; Supplemental Material: 7 pages, 5 figures |
| Databáze: | OpenAIRE |
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