Orbital torque and efficient magnetization switching using ultrathin Co|Al light-metal interfaces: Experiments and modeling
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909972492713984 |
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| author | Sebe, N. Pezo, A. Krishnia, S. Collin, S. George, J. -M. Fert, A. Cros, V. Jaffrès, H. |
| author_facet | Sebe, N. Pezo, A. Krishnia, S. Collin, S. George, J. -M. Fert, A. Cros, V. Jaffrès, H. |
| contents | The emergence of the orbital degree of freedom in modern orbitronics offers a promising alternative to heavy metals for the efficient control of magnetization. In this context, identifying interfaces that exhibit orbital-momentum locking and an orbital Rashba-Edelstein response to an external electric field is of primary importance. In this work, we experimentally investigate the Co/Al system and extend the study to Co/Pt/Al structures. We show that inserting ultrathin Pt layers between Co and Al can significantly modify the orbital properties, highlighting the critical role of Co/Al orbital bonding in generating orbital polarization. We further model the orbital response of these systems using semi-phenomenological approaches and linear-response theory within the framework of density-functional theory. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_18419 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Orbital torque and efficient magnetization switching using ultrathin Co|Al light-metal interfaces: Experiments and modeling Sebe, N. Pezo, A. Krishnia, S. Collin, S. George, J. -M. Fert, A. Cros, V. Jaffrès, H. Materials Science Mesoscale and Nanoscale Physics The emergence of the orbital degree of freedom in modern orbitronics offers a promising alternative to heavy metals for the efficient control of magnetization. In this context, identifying interfaces that exhibit orbital-momentum locking and an orbital Rashba-Edelstein response to an external electric field is of primary importance. In this work, we experimentally investigate the Co/Al system and extend the study to Co/Pt/Al structures. We show that inserting ultrathin Pt layers between Co and Al can significantly modify the orbital properties, highlighting the critical role of Co/Al orbital bonding in generating orbital polarization. We further model the orbital response of these systems using semi-phenomenological approaches and linear-response theory within the framework of density-functional theory. |
| title | Orbital torque and efficient magnetization switching using ultrathin Co|Al light-metal interfaces: Experiments and modeling |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.18419 |