Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet

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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.

In: Physical Review B, Vol. 105, No. 13, 134404, 01.04.2022.

Research output: Contribution to journal › Article › peer-review

Author

Vlasov, Sergei M. ; Kwiatkowski, Grzegorz J. ; Lobanov, Igor S. ; Uzdin, Valery M. ; Bessarab, Pavel F. / Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet. In: Physical Review B. 2022 ; Vol. 105, No. 13.

BibTeX

@article{adee54aeb066496ab23453f17a730977,

title = "Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet",

abstract = "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. ",

author = "Vlasov, {Sergei M.} and Kwiatkowski, {Grzegorz J.} and Lobanov, {Igor S.} and Uzdin, {Valery M.} and Bessarab, {Pavel F.}",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = apr,

day = "1",

doi = "10.1103/PhysRevB.105.134404",

language = "English",

volume = "105",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "13",

}

RIS

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.

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