Impact of trace amounts of interfacial oxidation on the spin–orbit torque in the Co/Pt heterostructures
| Autor: | Desheng Xue, Jiguang Yao, Yongwei Cui, Peng Zhang, Li Xi, Xiaolong Fan, Xiaoyu Feng, Qiaoning Bai, Jiangwei Cao |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Trace Amounts Condensed matter physics Magnetoresistance Bilayer Heterojunction 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ferromagnetic resonance Condensed Matter::Materials Science Magnetization 0103 physical sciences Perpendicular Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Spin (physics) |
| Zdroj: | Applied Physics Letters. 118:132410 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | We found that the exposure of a Co/Pt bilayer to air will result in a trace amount of oxidation at the Co/Pt interface, while the Pt layer is immune to oxidation. The appearance of CoOx results in a negative spin Hall magnetoresistance and unconventional spin–orbit torques (SOTs), which are observed through temperature-dependent transport and spin-torque ferromagnetic resonance measurements. These results can be understood by considering CoOx as an individual magnetic layer between Pt and Co, with two important characteristics: (1) its magnetization is aligned in the plane that is perpendicular to the magnetization of Co and (2) the spin transparency of CoOx increases with increasing temperature. These results help us understand the features of spin transport at the interface when oxidation occurs and further indicate that trace amounts of oxidation can be a highly effective method to control SOT in magnetic heterostructures. |
| Databáze: | OpenAIRE |
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