Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet
©2022 American Physical Society It is demonstrated by means of the optimal control theory that the energy cost of the spin-orbit torque induced reversal of a nanomagnet with perpendicular anisotropy can be strongly reduced by proper shaping of both in-plane components of the current pulse. The time...
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Online Access: | https://hdl.handle.net/20.500.11815/3064 https://doi.org/10.1103/PhysRevB.105.134404 |
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ftopinvisindi:oai:opinvisindi.is:20.500.11815/3064 2023-05-15T16:50:04+02:00 Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet Vlasov, Sergei M. Kwiatkowski, Grzegorz J. Lobanov, Igor S. Uzdin, Valery M. Bessarab, Pavel Raunvísindastofnun (HÍ) Science Institute (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland 2022-04-07 134404 https://hdl.handle.net/20.500.11815/3064 https://doi.org/10.1103/PhysRevB.105.134404 en eng American Physical Society (APS) Physical Review B;105(13) S. M. Vlasov, G. J. Kwiatkowski, I. S. Lobanov, V. M. Uzdin, & P. F. Bessarab. Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet. Physical Review B 105, 134404 (2022) 2469-9950 2469-9969 (eISSN) https://hdl.handle.net/20.500.11815/3064 Physical Review B doi:10.1103/PhysRevB.105.134404 info:eu-repo/semantics/openAccess Stærðfræðileg eðlisfræði spin dynamics spintronics magnetization switching magnetic nanoparticles Landau-Lifshitz-Gilbert equation Mathematical physics methods info:eu-repo/semantics/article 2022 ftopinvisindi https://doi.org/20.500.11815/3064 https://doi.org/10.1103/PhysRevB.105.134404 2022-11-18T06:52:18Z ©2022 American Physical Society It is demonstrated by means of the optimal control theory that the energy cost of the spin-orbit torque induced reversal of a nanomagnet with perpendicular anisotropy can be strongly reduced by proper shaping of both in-plane components of the current pulse. The time dependence of the optimal switching pulse that minimizes the energy cost associated with joule heating is derived analytically in terms of the required reversal time and material properties. The optimal reversal time providing a tradeoff between the switching speed and energy efficiency is obtained. A sweet-spot balance between the fieldlike and dampinglike components of the spin-orbit torque is discovered; it permits for a particularly efficient switching by a down-chirped rotating current pulse whose duration does not need to be adjusted precisely. Funded by the Russian Science Foundation (Grant No.19-72-10138), the Icelandic Research Fund (Grant No. 184949), the University of Iceland Research Fund (Grant No. 15673), and the Swedish Research Council (Grant No. 2020-05110). Peer Reviewed Article in Journal/Newspaper Iceland Opin vísindi (Iceland) Physical Review B 105 13 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Stærðfræðileg eðlisfræði spin dynamics spintronics magnetization switching magnetic nanoparticles Landau-Lifshitz-Gilbert equation Mathematical physics methods |
spellingShingle |
Stærðfræðileg eðlisfræði spin dynamics spintronics magnetization switching magnetic nanoparticles Landau-Lifshitz-Gilbert equation Mathematical physics methods Vlasov, Sergei M. Kwiatkowski, Grzegorz J. Lobanov, Igor S. Uzdin, Valery M. Bessarab, Pavel Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet |
topic_facet |
Stærðfræðileg eðlisfræði spin dynamics spintronics magnetization switching magnetic nanoparticles Landau-Lifshitz-Gilbert equation Mathematical physics methods |
description |
©2022 American Physical Society It is demonstrated by means of the optimal control theory that the energy cost of the spin-orbit torque induced reversal of a nanomagnet with perpendicular anisotropy can be strongly reduced by proper shaping of both in-plane components of the current pulse. The time dependence of the optimal switching pulse that minimizes the energy cost associated with joule heating is derived analytically in terms of the required reversal time and material properties. The optimal reversal time providing a tradeoff between the switching speed and energy efficiency is obtained. A sweet-spot balance between the fieldlike and dampinglike components of the spin-orbit torque is discovered; it permits for a particularly efficient switching by a down-chirped rotating current pulse whose duration does not need to be adjusted precisely. Funded by the Russian Science Foundation (Grant No.19-72-10138), the Icelandic Research Fund (Grant No. 184949), the University of Iceland Research Fund (Grant No. 15673), and the Swedish Research Council (Grant No. 2020-05110). Peer Reviewed |
author2 |
Raunvísindastofnun (HÍ) Science Institute (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland |
format |
Article in Journal/Newspaper |
author |
Vlasov, Sergei M. Kwiatkowski, Grzegorz J. Lobanov, Igor S. Uzdin, Valery M. Bessarab, Pavel |
author_facet |
Vlasov, Sergei M. Kwiatkowski, Grzegorz J. Lobanov, Igor S. Uzdin, Valery M. Bessarab, Pavel |
author_sort |
Vlasov, Sergei M. |
title |
Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet |
title_short |
Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet |
title_full |
Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet |
title_fullStr |
Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet |
title_full_unstemmed |
Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet |
title_sort |
optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet |
publisher |
American Physical Society (APS) |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.11815/3064 https://doi.org/10.1103/PhysRevB.105.134404 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
Physical Review B;105(13) S. M. Vlasov, G. J. Kwiatkowski, I. S. Lobanov, V. M. Uzdin, & P. F. Bessarab. Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet. Physical Review B 105, 134404 (2022) 2469-9950 2469-9969 (eISSN) https://hdl.handle.net/20.500.11815/3064 Physical Review B doi:10.1103/PhysRevB.105.134404 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/3064 https://doi.org/10.1103/PhysRevB.105.134404 |
container_title |
Physical Review B |
container_volume |
105 |
container_issue |
13 |
_version_ |
1766040250820329472 |