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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.16060 |
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| _version_ | 1866929683626459136 |
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| author | Mukherjee, Tamali Murthy, V Satya Narayana |
| author_facet | Mukherjee, Tamali Murthy, V Satya Narayana |
| contents | Skyrmions, which are topologically stable magnetic structures, have manifested promising features to be used as an information carrier in new-age, non-volatile data storage devices. In this article, Co/Pt square nano-structure with Co-free layer thickness in the range of 1 nm to 5 nm is taken to study the controlled creation of skyrmions. The magnetization dynamics controlled by the current-induced spin transfer torque help to nucleate skyrmions by transforming the perpendicularly magnetized ground state. This process leads to a stable state of isolated skyrmions via a complex transformation of the Neel wall following its image inversion. Skyrmion numbers vary with increasing thickness as the current density gradually increases. The impact of higher-order anisotropy constants (up to the second order) on the relaxed state of a system, compared to first-order anisotropy alone, has been examined. Additionally, the effect of temperature on the formation of skyrmions has been analyzed for all thicknesses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16060 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Role of magnetic anisotropy constant orders and thermal noise on skyrmion formation in the Co/Pt square nanostructure Mukherjee, Tamali Murthy, V Satya Narayana Materials Science Skyrmions, which are topologically stable magnetic structures, have manifested promising features to be used as an information carrier in new-age, non-volatile data storage devices. In this article, Co/Pt square nano-structure with Co-free layer thickness in the range of 1 nm to 5 nm is taken to study the controlled creation of skyrmions. The magnetization dynamics controlled by the current-induced spin transfer torque help to nucleate skyrmions by transforming the perpendicularly magnetized ground state. This process leads to a stable state of isolated skyrmions via a complex transformation of the Neel wall following its image inversion. Skyrmion numbers vary with increasing thickness as the current density gradually increases. The impact of higher-order anisotropy constants (up to the second order) on the relaxed state of a system, compared to first-order anisotropy alone, has been examined. Additionally, the effect of temperature on the formation of skyrmions has been analyzed for all thicknesses. |
| title | Role of magnetic anisotropy constant orders and thermal noise on skyrmion formation in the Co/Pt square nanostructure |
| topic | Materials Science |
| url | https://arxiv.org/abs/2402.16060 |