Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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 F.
в: Physical Review B, Том 105, № 13, 134404, 01.04.2022.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet
AU - Vlasov, Sergei M.
AU - Kwiatkowski, Grzegorz J.
AU - Lobanov, Igor S.
AU - Uzdin, Valery M.
AU - Bessarab, Pavel F.
N1 - Publisher Copyright: © 2022 American Physical Society.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85128364171&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.105.134404
DO - 10.1103/PhysRevB.105.134404
M3 - Article
AN - SCOPUS:85128364171
VL - 105
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 13
M1 - 134404
ER -
ID: 95277923