Observation of Orbit-Orbit Torques: Highly Efficient Torques on Orbital Moments Induced by Orbital Currents
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arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866910269929684992 |
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| author | Chen, Hongyu Yan, Han Zhou, Xiaorong Wang, Xiaoning Meng, Ziang Liu, Li Zhao, Guojian Duan, Zhiyuan Jiang, Sixu Li, Jingyu Tan, Xiaoyang Qin, Peixin Liu, Zhiqi |
| author_facet | Chen, Hongyu Yan, Han Zhou, Xiaorong Wang, Xiaoning Meng, Ziang Liu, Li Zhao, Guojian Duan, Zhiyuan Jiang, Sixu Li, Jingyu Tan, Xiaoyang Qin, Peixin Liu, Zhiqi |
| contents | We study the current-induced torques in bilayers composed of a light 3d metal, chromium, and a rare-earth ferromagnet with finite orbital moments, terbium, utilizing second-harmonic Hall-response measurements. The dampinglike torque efficiency of chromium is found to be positive and reaches ~3.66 in this system, in sharp contrast to the negative and subtle dampinglike torque efficiency in general Cr/ferromagnet heterostructures with quenched orbital moment. We suggest that the orbital currents generated by the orbital Hall effect in Cr can be injected into Tb with negligible loss at the interface and then efficiently interact with the orbital moments. We term such an exotic effect as the orbit-orbit torque (OOT). Our work implies that orbital currents could be harnessed to manipulate the orbital magnetization of materials, which would advance the development of orbitronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_04151 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Observation of Orbit-Orbit Torques: Highly Efficient Torques on Orbital Moments Induced by Orbital Currents Chen, Hongyu Yan, Han Zhou, Xiaorong Wang, Xiaoning Meng, Ziang Liu, Li Zhao, Guojian Duan, Zhiyuan Jiang, Sixu Li, Jingyu Tan, Xiaoyang Qin, Peixin Liu, Zhiqi Mesoscale and Nanoscale Physics Materials Science Applied Physics We study the current-induced torques in bilayers composed of a light 3d metal, chromium, and a rare-earth ferromagnet with finite orbital moments, terbium, utilizing second-harmonic Hall-response measurements. The dampinglike torque efficiency of chromium is found to be positive and reaches ~3.66 in this system, in sharp contrast to the negative and subtle dampinglike torque efficiency in general Cr/ferromagnet heterostructures with quenched orbital moment. We suggest that the orbital currents generated by the orbital Hall effect in Cr can be injected into Tb with negligible loss at the interface and then efficiently interact with the orbital moments. We term such an exotic effect as the orbit-orbit torque (OOT). Our work implies that orbital currents could be harnessed to manipulate the orbital magnetization of materials, which would advance the development of orbitronics. |
| title | Observation of Orbit-Orbit Torques: Highly Efficient Torques on Orbital Moments Induced by Orbital Currents |
| topic | Mesoscale and Nanoscale Physics Materials Science Applied Physics |
| url | https://arxiv.org/abs/2602.04151 |