تقرير
Enhanced torque efficiency in ferromagnetic multilayers by introducing naturally oxidized Cu
| العنوان: | Enhanced torque efficiency in ferromagnetic multilayers by introducing naturally oxidized Cu |
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| المؤلفون: | Zheng, Kun, Cao, Cuimei, Lu, Yingying, Meng, Jing, Pan, Junpeng, Zhao, Zhenjie, Xu, Yang, Shang, Tian, Zhan, Qingfeng |
| المصدر: | Appl. Phys. Lett. 124, 192408 (2024) |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Spin-orbit torque (SOT) in the heavy elements with a large spin-orbit coupling (SOC) has been frequently used to manipulate the magnetic states in spintronic devices. Recent theoretical works have predicted that the surface oxidized light elements with a negligible SOC can yield a sizable orbital torque (OT), which plays an important role in switching the magnetization. Here, we report anomalous-Hall-resistance and harmonic-Hall-voltage measurements on perpendicularly magnetized Ta/Cu/[Ni/Co]$_5$/Cu-CuO$_x$ multilayers. Both torque efficiency and spin-Hall angle of these multilayers are largely enhanced by introducing a naturally oxidized Cu-CuO$_x$ layer, where the SOC is negligible. Such an enhancement is mainly due to the collaborative driven of the SOT from the Ta layer and the OT from the Cu/CuO$_x$ interface, and can be tuned by controlling the thickness of Cu-CuO$_x$ layer. Compared to the Cu-CuO$_x$-free multilayers, the maximum torque efficiency and spin-Hall angle were enhanced by a factor of ten, larger than most of the reported values in the other heterostructures. Comment: 10 pages, 5 figures, accepted by Appl. Phys. Lett |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/5.0190257 |
| URL الوصول: | http://arxiv.org/abs/2404.18055 |
| رقم الأكسشن: | edsarx.2404.18055 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/5.0190257 |
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