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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.17328 |
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| _version_ | 1866908500217561088 |
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| author | Yin, Xiaomiao Li, Zhengxiao Kang, Jun Xiong, Changmin Zhu, Lijun |
| author_facet | Yin, Xiaomiao Li, Zhengxiao Kang, Jun Xiong, Changmin Zhu, Lijun |
| contents | We report the development of the [Pt0.75Ti0.25/Co-Ni multilayer/Ta]n superlattice with strong spin-orbit torque, large perpendicular magnetic anisotropy, and low switching current density. We demonstrate that the efficiency of the spin-orbit torque increases linearly with the repetition number n, which is in good agreement with the spin Hall effect of the Pt0.75Ti0.25 being the only source of the spin-orbit torque. Meanwhile, the perpendicular magnetic anisotropy field is also enhanced by more than a factor of 2 as n increases from 1 to 6. The [Pt0.75Ti0.25/(Co/Ni)3/Ta]n superlattice also exhibits deterministic, low-current-density magnetization switching despite the very large layer thicknesses. The combination of the strong spin-orbit torque, perpendicular magnetic anisotropy, and low-current-density switching makes the [Pt0.75Ti0.25/Co-Ni multilayer/Ta]n superlattice a compelling material candidate for ultrafast, energy-efficient, long-data-retention spintronic technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_17328 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Strong Enhancement of Spin-Orbit Torques and Perpendicular Magnetic Anisotropy in [Pt0.75Ti0.25/Co-Ni multilayer/Ta]n Superlattices Yin, Xiaomiao Li, Zhengxiao Kang, Jun Xiong, Changmin Zhu, Lijun Materials Science We report the development of the [Pt0.75Ti0.25/Co-Ni multilayer/Ta]n superlattice with strong spin-orbit torque, large perpendicular magnetic anisotropy, and low switching current density. We demonstrate that the efficiency of the spin-orbit torque increases linearly with the repetition number n, which is in good agreement with the spin Hall effect of the Pt0.75Ti0.25 being the only source of the spin-orbit torque. Meanwhile, the perpendicular magnetic anisotropy field is also enhanced by more than a factor of 2 as n increases from 1 to 6. The [Pt0.75Ti0.25/(Co/Ni)3/Ta]n superlattice also exhibits deterministic, low-current-density magnetization switching despite the very large layer thicknesses. The combination of the strong spin-orbit torque, perpendicular magnetic anisotropy, and low-current-density switching makes the [Pt0.75Ti0.25/Co-Ni multilayer/Ta]n superlattice a compelling material candidate for ultrafast, energy-efficient, long-data-retention spintronic technologies. |
| title | Strong Enhancement of Spin-Orbit Torques and Perpendicular Magnetic Anisotropy in [Pt0.75Ti0.25/Co-Ni multilayer/Ta]n Superlattices |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.17328 |