Chen, L. and Zollner, K. and Parzefall, S. and Schmitt, J. and Kronseder, M. and Fabian, Jaroslav and Weiss, Dieter and Back, Christian H. (2022) Connections between spin-orbit torques and unidirectional magnetoresistance in ferromagnetic-metal-heavy-metal heterostructures. PHYSICAL REVIEW B, 105 (2): L020406. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We investigate the connections between current-induced spin-orbit torques and unidirectional magnetoresistance (UMR) by performing second harmonic longitudinal resistance measurements on Co/Pt bilayer with magnetic-field mu 0H up to 10 T and temperature T down to 2 K. The fieldlike torque hFL changes sign with varying Co thickness tCo, which indicates that competing mechanisms, i.e., the spin Hall effect (SHE) and the inverse spin galvanic effect (iSGE), are responsible for the generation of hFL. The sign of hFL coincides with the sign of UMR induced by spin-dependent scattering. However, the dampinglike torque hDL is proportional to the inverse Co thickness, with no sign reversal for all measured temperatures and tCo, indicating that hDL originates solely from the SHE. The generation of hDL via iSGE can be further excluded because of the observation of an H-linear dependence of UMR, which, in turn, indicates the negligible exchange coupling between spin accumulation and ferromagnetic metal.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DRIVEN; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Nov 2023 16:21 |
| Last Modified: | 21 Nov 2023 16:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56778 |
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