Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source
We study the W/Cu multilayers as a spin current source and the coherent spin-orbit torques in a Fe layer using the spin-torque ferromagnetic resonance (STFMR) technique. With increasing numbers of layers, the line shape of the STFMR signals changes from predominantly antisymmetric to predominantly s...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/169154 |
| _version_ | 1826122768293298176 |
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| author | Coester, Birte Lim, Gerard Joseph Tan, Funan Poh, Hanyin Lew, Wen Siang |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Coester, Birte Lim, Gerard Joseph Tan, Funan Poh, Hanyin Lew, Wen Siang |
| author_sort | Coester, Birte |
| collection | NTU |
| description | We study the W/Cu multilayers as a spin current source and the coherent spin-orbit torques in a Fe layer using the spin-torque ferromagnetic resonance (STFMR) technique. With increasing numbers of layers, the line shape of the STFMR signals changes from predominantly antisymmetric to predominantly symmetric. When using [W(0.5)/Cu(0.5)]5 as a spin current source, the symmetric amplitude increases by a factor of 5 compared to a single W layer. Simultaneously, the effective damping parameter also increases slightly due to enhanced spin pumping. Along with an increasing trend in the damping-like torque efficiency, this suggests that the extrinsic spin Hall effect is enhanced. Concurrently, the antisymmetric amplitude decreases significantly by a factor of 27, which indicates an increase in the field-like torque when multilayers are used as a spin current source. |
| first_indexed | 2024-10-01T05:53:54Z |
| format | Journal Article |
| id | ntu-10356/169154 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:53:54Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1691542023-07-10T15:34:33Z Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source Coester, Birte Lim, Gerard Joseph Tan, Funan Poh, Hanyin Lew, Wen Siang School of Physical and Mathematical Sciences Science::Physics Spin Orbits Resonance Technique We study the W/Cu multilayers as a spin current source and the coherent spin-orbit torques in a Fe layer using the spin-torque ferromagnetic resonance (STFMR) technique. With increasing numbers of layers, the line shape of the STFMR signals changes from predominantly antisymmetric to predominantly symmetric. When using [W(0.5)/Cu(0.5)]5 as a spin current source, the symmetric amplitude increases by a factor of 5 compared to a single W layer. Simultaneously, the effective damping parameter also increases slightly due to enhanced spin pumping. Along with an increasing trend in the damping-like torque efficiency, this suggests that the extrinsic spin Hall effect is enhanced. Concurrently, the antisymmetric amplitude decreases significantly by a factor of 27, which indicates an increase in the field-like torque when multilayers are used as a spin current source. Agency for Science, Technology and Research (A*STAR) Published version This work was supported by the RIE2020 ASTAR AME IAF-ICP grant via Grant No. I1801E0030. 2023-07-04T01:19:33Z 2023-07-04T01:19:33Z 2023 Journal Article Coester, B., Lim, G. J., Tan, F., Poh, H. & Lew, W. S. (2023). Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source. Journal of Applied Physics, 133(22), 223904-1-223904-11. https://dx.doi.org/10.1063/5.0139212 0021-8979 https://hdl.handle.net/10356/169154 10.1063/5.0139212 2-s2.0-85161920282 22 133 223904-1 223904-11 en I1801E0030 Journal of Applied Physics © 2023 Author(s). Published under an exclusive license by AIP Publishing. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the author(s) and AIP Publishing. This article appeared in Coester, B., Lim, G. J., Tan, F., Poh, H. & Lew, W. S. (2023). Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source. Journal of Applied Physics, 133(22), 223904-1 - 223904-11 and may be found at https://doi.org/10.1063/5.0139212 application/pdf |
| spellingShingle | Science::Physics Spin Orbits Resonance Technique Coester, Birte Lim, Gerard Joseph Tan, Funan Poh, Hanyin Lew, Wen Siang Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source |
| title | Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source |
| title_full | Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source |
| title_fullStr | Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source |
| title_full_unstemmed | Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source |
| title_short | Investigation of spin-orbit torque performance with W/Cu-multilayers as spin current source |
| title_sort | investigation of spin orbit torque performance with w cu multilayers as spin current source |
| topic | Science::Physics Spin Orbits Resonance Technique |
| url | https://hdl.handle.net/10356/169154 |
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