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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/2512.22726 |
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| _version_ | 1866908861028368384 |
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| author | Abdizadeh, Sachli Maizel, Rachel E. Haymore, Dylan L. Zhao, Jing Michel, F. Marc Emori, Satoru |
| author_facet | Abdizadeh, Sachli Maizel, Rachel E. Haymore, Dylan L. Zhao, Jing Michel, F. Marc Emori, Satoru |
| contents | Emerging spin-orbit-torque devices based on spin valves require a thin magnetic free layer to maximize the torque per moment. However, reducing the free-layer thickness to $\lesssim 2$ nm deteriorates the giant magnetoresistance (GMR) signal for electrical readout. Here, we demonstrate that the addition of a 1-nm Cu seed layer promotes sharp interfaces in simple polycrystalline Co-based spin valves, enabling high GMR ratios of 5-7% at sub-2-nm free-layer thicknesses. Our work offers a pathway for engineering high-signal GMR readout in spin-orbit-torque digital memories and neuromorphic computers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_22726 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Enabling high giant magnetoresistance in simple spin valves with ultrathin seed and free layers Abdizadeh, Sachli Maizel, Rachel E. Haymore, Dylan L. Zhao, Jing Michel, F. Marc Emori, Satoru Materials Science Emerging spin-orbit-torque devices based on spin valves require a thin magnetic free layer to maximize the torque per moment. However, reducing the free-layer thickness to $\lesssim 2$ nm deteriorates the giant magnetoresistance (GMR) signal for electrical readout. Here, we demonstrate that the addition of a 1-nm Cu seed layer promotes sharp interfaces in simple polycrystalline Co-based spin valves, enabling high GMR ratios of 5-7% at sub-2-nm free-layer thicknesses. Our work offers a pathway for engineering high-signal GMR readout in spin-orbit-torque digital memories and neuromorphic computers. |
| title | Enabling high giant magnetoresistance in simple spin valves with ultrathin seed and free layers |
| topic | Materials Science |
| url | https://arxiv.org/abs/2512.22726 |