Spin-orbit torques and magnetization switching in Gd/Fe multilayers generated by current injection in NiCu alloys
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866914624716144640 |
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| author | Nasr, Federica Binda, Federico Lambert, Charles-Henri Sala, Giacomo Noël, Paul Gambardella, Pietro |
| author_facet | Nasr, Federica Binda, Federico Lambert, Charles-Henri Sala, Giacomo Noël, Paul Gambardella, Pietro |
| contents | Light transition metals have recently emerged as a sustainable material class for efficient spin-charge interconversion. We report measurements of current-induced spin-orbit torques generated by Ni$_{1-x}$Cu$_{x}$ alloys in perpendicularly magnetized ferrimagnetic Gd/Fe multilayers. We show that the spin-orbit torque efficiency of Ni$_{1-x}$Cu$_{x}$ increases with the Ni/Cu atomic ratio, reaching values comparable to those of Pt for Ni$_{55}$Cu$_{45}$. Furthermore, we demonstrate magnetization switching of a 20-nm-thick Gd/Fe multilayer with a threshold current that decreases with increasing Ni concentration, similar to the spin-orbit torque efficiency. Our findings show that Ni$_{1-x}$Cu$_{x}$$-$based magnetic heterostructures allow for efficient control of the magnetization by electric currents. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_17652 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Spin-orbit torques and magnetization switching in Gd/Fe multilayers generated by current injection in NiCu alloys Nasr, Federica Binda, Federico Lambert, Charles-Henri Sala, Giacomo Noël, Paul Gambardella, Pietro Materials Science Applied Physics Light transition metals have recently emerged as a sustainable material class for efficient spin-charge interconversion. We report measurements of current-induced spin-orbit torques generated by Ni$_{1-x}$Cu$_{x}$ alloys in perpendicularly magnetized ferrimagnetic Gd/Fe multilayers. We show that the spin-orbit torque efficiency of Ni$_{1-x}$Cu$_{x}$ increases with the Ni/Cu atomic ratio, reaching values comparable to those of Pt for Ni$_{55}$Cu$_{45}$. Furthermore, we demonstrate magnetization switching of a 20-nm-thick Gd/Fe multilayer with a threshold current that decreases with increasing Ni concentration, similar to the spin-orbit torque efficiency. Our findings show that Ni$_{1-x}$Cu$_{x}$$-$based magnetic heterostructures allow for efficient control of the magnetization by electric currents. |
| title | Spin-orbit torques and magnetization switching in Gd/Fe multilayers generated by current injection in NiCu alloys |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2312.17652 |