Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency
Current-induced magnetization switching by spin-orbit torque generated through heavy metals offers an enticing realm for energy-efficient memory and logic devices. Since the first demonstration of the spin Hall effect, many research revolves about understanding and enhancing its efficiency. However,...
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| Format: | Thesis-Doctor of Philosophy |
| Language: | English |
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Nanyang Technological University
2022
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| Online Access: | https://hdl.handle.net/10356/155644 |
| _version_ | 1826116875059200000 |
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| author | Wong, Grayson Dao Hwee |
| author2 | Lew Wen Siang |
| author_facet | Lew Wen Siang Wong, Grayson Dao Hwee |
| author_sort | Wong, Grayson Dao Hwee |
| collection | NTU |
| description | Current-induced magnetization switching by spin-orbit torque generated through heavy metals offers an enticing realm for energy-efficient memory and logic devices. Since the first demonstration of the spin Hall effect, many research revolves about understanding and enhancing its efficiency. However, even with the accumulated development over the past decades, the techniques to enhance the spin current generation are limited while the manipulation of current-induced spin-orbit torques remains elusive and challenging. In our work, we explored the thermal behaviors of spin current generation in PtxCu1-x alloys in search for robustness even at elevated temperature. Next, we investigated the effects of strain on spin current generation and discovered that the enhancement can be retained. This enhancement can then be controlled using a combination of annealing and strain treatment. Our findings help deepen our understanding of the different techniques to manipulate the spin-current generation. |
| first_indexed | 2024-10-01T04:18:34Z |
| format | Thesis-Doctor of Philosophy |
| id | ntu-10356/155644 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:18:34Z |
| publishDate | 2022 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1556442023-02-28T23:40:18Z Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency Wong, Grayson Dao Hwee Lew Wen Siang School of Physical and Mathematical Sciences Globalfoundries Singapore WenSiang@ntu.edu.sg Science::Physics::Electricity and magnetism Current-induced magnetization switching by spin-orbit torque generated through heavy metals offers an enticing realm for energy-efficient memory and logic devices. Since the first demonstration of the spin Hall effect, many research revolves about understanding and enhancing its efficiency. However, even with the accumulated development over the past decades, the techniques to enhance the spin current generation are limited while the manipulation of current-induced spin-orbit torques remains elusive and challenging. In our work, we explored the thermal behaviors of spin current generation in PtxCu1-x alloys in search for robustness even at elevated temperature. Next, we investigated the effects of strain on spin current generation and discovered that the enhancement can be retained. This enhancement can then be controlled using a combination of annealing and strain treatment. Our findings help deepen our understanding of the different techniques to manipulate the spin-current generation. Doctor of Philosophy 2022-03-09T06:37:18Z 2022-03-09T06:37:18Z 2021 Thesis-Doctor of Philosophy Wong, G. D. H. (2021). Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/155644 https://hdl.handle.net/10356/155644 10.32657/10356/155644 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University |
| spellingShingle | Science::Physics::Electricity and magnetism Wong, Grayson Dao Hwee Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency |
| title | Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency |
| title_full | Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency |
| title_fullStr | Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency |
| title_full_unstemmed | Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency |
| title_short | Spin-torque ferromagnetic resonance investigation for enhancement of spin-orbit torque efficiency |
| title_sort | spin torque ferromagnetic resonance investigation for enhancement of spin orbit torque efficiency |
| topic | Science::Physics::Electricity and magnetism |
| url | https://hdl.handle.net/10356/155644 |
| work_keys_str_mv | AT wonggraysondaohwee spintorqueferromagneticresonanceinvestigationforenhancementofspinorbittorqueefficiency |