Reversible strain-induced spin-orbit torque on flexible substrate
We propose the use of mechanical strain and mild annealing to achieve reversible modulation of spin-orbit torque (SOT) and Gilbert damping parameter. X-ray diffraction results show that the residual spin-orbit torque enhancement and Gilbert damping reduction, due to the post-mechanical strain treatm...
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sg-ntu-dr.10356-1535432023-02-28T19:55:19Z Reversible strain-induced spin-orbit torque on flexible substrate Wong, Grayson Dao Hwee Ang, Calvin Ching Ian Gan, Weiliang Law, Wai Cheung Xu, Zhan Xu, Feng Seet, Chim Seng Lew, Wen Siang School of Physical and Mathematical Sciences Science::Physics Spin-Orbit Torque Ferromagnetic Resonance We propose the use of mechanical strain and mild annealing to achieve reversible modulation of spin-orbit torque (SOT) and Gilbert damping parameter. X-ray diffraction results show that the residual spin-orbit torque enhancement and Gilbert damping reduction, due to the post-mechanical strain treatment, can be reset using mild annealing to alleviate the internal strain. The spin Hall efficiency of the heat- and strain-treated Pt/Co bilayer was characterized through spin-torque ferromagnetic resonance, and it was found that the device could switch between the strain enhanced SOT and the pristine state. The Gilbert damping parameter behaves inversely with the spin Hall efficiency, and therefore, strain can be used to easily tune the device switching current density by a factor of ∼2 from its pristine state. Furthermore, the resonance frequency of the Pt/Co bilayer could be tuned using purely mechanical strain, and from the endurance test, the Pt/Co device can be reversibly manipulated over 104 cycles demonstrating its robustness as a flexible device. Agency for Science, Technology and Research (A*STAR) Economic Development Board (EDB) Published version This work was supported by an Industry-IHL Partnership Program (No. NRF2015-IIP001-001) and an EDB-IPP (Grant No. RCA-17/284). This work was also supported by the RIE2020 ASTAR AME IAF-ICP Grant No. I1801E0030. 2021-12-07T04:43:23Z 2021-12-07T04:43:23Z 2021 Journal Article Wong, G. D. H., Ang, C. C. I., Gan, W., Law, W. C., Xu, Z., Xu, F., Seet, C. S. & Lew, W. S. (2021). Reversible strain-induced spin-orbit torque on flexible substrate. Applied Physics Letters, 119(4), 042402-. https://dx.doi.org/10.1063/5.0056995 0003-6951 https://hdl.handle.net/10356/153543 10.1063/5.0056995 2-s2.0-85111702750 4 119 042402 en NRF2015-IIP001-001 I1801E0030 RCA-17/284 Applied Physics Letters © 2021 Author(s). All rights reserved. This paper was published by AIP Publishing in Applied Physics Letters and is made available with permission of Author(s). application/pdf |
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Science::Physics Spin-Orbit Torque Ferromagnetic Resonance Wong, Grayson Dao Hwee Ang, Calvin Ching Ian Gan, Weiliang Law, Wai Cheung Xu, Zhan Xu, Feng Seet, Chim Seng Lew, Wen Siang Reversible strain-induced spin-orbit torque on flexible substrate |
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We propose the use of mechanical strain and mild annealing to achieve reversible modulation of spin-orbit torque (SOT) and Gilbert damping parameter. X-ray diffraction results show that the residual spin-orbit torque enhancement and Gilbert damping reduction, due to the post-mechanical strain treatment, can be reset using mild annealing to alleviate the internal strain. The spin Hall efficiency of the heat- and strain-treated Pt/Co bilayer was characterized through spin-torque ferromagnetic resonance, and it was found that the device could switch between the strain enhanced SOT and the pristine state. The Gilbert damping parameter behaves inversely with the spin Hall efficiency, and therefore, strain can be used to easily tune the device switching current density by a factor of ∼2 from its pristine state. Furthermore, the resonance frequency of the Pt/Co bilayer could be tuned using purely mechanical strain, and from the endurance test, the Pt/Co device can be reversibly manipulated over 104 cycles demonstrating its robustness as a flexible device. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Wong, Grayson Dao Hwee Ang, Calvin Ching Ian Gan, Weiliang Law, Wai Cheung Xu, Zhan Xu, Feng Seet, Chim Seng Lew, Wen Siang |
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Article |
author |
Wong, Grayson Dao Hwee Ang, Calvin Ching Ian Gan, Weiliang Law, Wai Cheung Xu, Zhan Xu, Feng Seet, Chim Seng Lew, Wen Siang |
author_sort |
Wong, Grayson Dao Hwee |
title |
Reversible strain-induced spin-orbit torque on flexible substrate |
title_short |
Reversible strain-induced spin-orbit torque on flexible substrate |
title_full |
Reversible strain-induced spin-orbit torque on flexible substrate |
title_fullStr |
Reversible strain-induced spin-orbit torque on flexible substrate |
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Reversible strain-induced spin-orbit torque on flexible substrate |
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reversible strain-induced spin-orbit torque on flexible substrate |
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2021 |
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https://hdl.handle.net/10356/153543 |
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