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Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers

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Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers. / Belashchenko, K. D.; Kovalev, Alexey A.; Van Schilfgaarde, M.

In: Physical Review B, Vol. 101, No. 2, 020407, 17.01.2020.

Research output: Contribution to journalArticle

Harvard

Belashchenko, KD, Kovalev, AA & Van Schilfgaarde, M 2020, 'Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers', Physical Review B, vol. 101, no. 2, 020407. https://doi.org/10.1103/PhysRevB.101.020407

APA

Belashchenko, K. D., Kovalev, A. A., & Van Schilfgaarde, M. (2020). Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers. Physical Review B, 101(2), [020407]. https://doi.org/10.1103/PhysRevB.101.020407

Vancouver

Belashchenko KD, Kovalev AA, Van Schilfgaarde M. Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers. Physical Review B. 2020 Jan 17;101(2). 020407. https://doi.org/10.1103/PhysRevB.101.020407

Author

Belashchenko, K. D. ; Kovalev, Alexey A. ; Van Schilfgaarde, M. / Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers. In: Physical Review B. 2020 ; Vol. 101, No. 2.

Bibtex Download

@article{5c4796136ab347b78fb4ffbc749e3c93,
title = "Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers",
abstract = "The thickness dependence of spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers is studied using the first-principles nonequilibrium Green's function formalism combined with the Anderson disorder model. A systematic expansion in orthogonal vector spherical harmonics is used for the angular dependence of the torque. The dampinglike torque in Co/Pt and Co/Au bilayers can be described as a sum of the spin-Hall contribution, which increases with thickness in agreement with the spin-diffusion model, and a comparable interfacial contribution. The magnetoconductance in the plane perpendicular to the current in Co/Pt bilayers is of the order of a conductance quantum per interfacial atom, exceeding the prediction of the spin-Hall model by more than an order of magnitude. This suggests that the {"}spin-Hall magnetoresistance,{"} similarly to the dampinglike torque, has a large interfacial contribution unrelated to the spin-Hall effect.",
author = "Belashchenko, {K. D.} and Kovalev, {Alexey A.} and {Van Schilfgaarde}, M.",
year = "2020",
month = jan,
day = "17",
doi = "10.1103/PhysRevB.101.020407",
language = "English",
volume = "101",
journal = "Physical Review B (Condensed Matter and Materials Physics)",
issn = "1098-0121",
publisher = "American Physical Society",
number = "2",

}

RIS (suitable for import to EndNote) Download

TY - JOUR

T1 - Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers

AU - Belashchenko, K. D.

AU - Kovalev, Alexey A.

AU - Van Schilfgaarde, M.

PY - 2020/1/17

Y1 - 2020/1/17

N2 - The thickness dependence of spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers is studied using the first-principles nonequilibrium Green's function formalism combined with the Anderson disorder model. A systematic expansion in orthogonal vector spherical harmonics is used for the angular dependence of the torque. The dampinglike torque in Co/Pt and Co/Au bilayers can be described as a sum of the spin-Hall contribution, which increases with thickness in agreement with the spin-diffusion model, and a comparable interfacial contribution. The magnetoconductance in the plane perpendicular to the current in Co/Pt bilayers is of the order of a conductance quantum per interfacial atom, exceeding the prediction of the spin-Hall model by more than an order of magnitude. This suggests that the "spin-Hall magnetoresistance," similarly to the dampinglike torque, has a large interfacial contribution unrelated to the spin-Hall effect.

AB - The thickness dependence of spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers is studied using the first-principles nonequilibrium Green's function formalism combined with the Anderson disorder model. A systematic expansion in orthogonal vector spherical harmonics is used for the angular dependence of the torque. The dampinglike torque in Co/Pt and Co/Au bilayers can be described as a sum of the spin-Hall contribution, which increases with thickness in agreement with the spin-diffusion model, and a comparable interfacial contribution. The magnetoconductance in the plane perpendicular to the current in Co/Pt bilayers is of the order of a conductance quantum per interfacial atom, exceeding the prediction of the spin-Hall model by more than an order of magnitude. This suggests that the "spin-Hall magnetoresistance," similarly to the dampinglike torque, has a large interfacial contribution unrelated to the spin-Hall effect.

UR - http://www.scopus.com/inward/record.url?scp=85078334132&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.101.020407

DO - 10.1103/PhysRevB.101.020407

M3 - Article

AN - SCOPUS:85078334132

VL - 101

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

SN - 1098-0121

IS - 2

M1 - 020407

ER -

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