Lifetime of racetrack skyrmions

Research output: Contribution to journalArticle

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Lifetime of racetrack skyrmions. / Bessarab, Pavel F.; Müller, Gideon P.; Lobanov, Igor S.; Rybakov, Filipp N.; Kiselev, Nikolai S.; Jónsson, Hannes; Uzdin, Valery M.; Blügel, Stefan; Bergqvist, Lars; Delin, Anna.

In: Scientific Reports, Vol. 8, No. 1, 3433, 01.12.2018, p. 1-10.

Research output: Contribution to journalArticle

Harvard

Bessarab, PF, Müller, GP, Lobanov, IS, Rybakov, FN, Kiselev, NS, Jónsson, H, Uzdin, VM, Blügel, S, Bergqvist, L & Delin, A 2018, 'Lifetime of racetrack skyrmions', Scientific Reports, vol. 8, no. 1, 3433, pp. 1-10. https://doi.org/10.1038/s41598-018-21623-3

APA

Bessarab, P. F., Müller, G. P., Lobanov, I. S., Rybakov, F. N., Kiselev, N. S., Jónsson, H., ... Delin, A. (2018). Lifetime of racetrack skyrmions. Scientific Reports, 8(1), 1-10. [3433]. https://doi.org/10.1038/s41598-018-21623-3

Vancouver

Bessarab PF, Müller GP, Lobanov IS, Rybakov FN, Kiselev NS, Jónsson H et al. Lifetime of racetrack skyrmions. Scientific Reports. 2018 Dec 1;8(1):1-10. 3433. https://doi.org/10.1038/s41598-018-21623-3

Author

Bessarab, Pavel F. ; Müller, Gideon P. ; Lobanov, Igor S. ; Rybakov, Filipp N. ; Kiselev, Nikolai S. ; Jónsson, Hannes ; Uzdin, Valery M. ; Blügel, Stefan ; Bergqvist, Lars ; Delin, Anna. / Lifetime of racetrack skyrmions. In: Scientific Reports. 2018 ; Vol. 8, No. 1. pp. 1-10.

Bibtex - Download

@article{2890afaae4614ebfa600f6cdda49bb3f,
title = "Lifetime of racetrack skyrmions",
abstract = "The skyrmion racetrack is a promising concept for future information technology. There, binary bits are carried by nanoscale spin swirls-skyrmions-driven along magnetic strips. Stability of the skyrmions is a critical issue for realising this technology. Here we demonstrate that the racetrack skyrmion lifetime can be calculated from first principles as a function of temperature, magnetic field and track width. Our method combines harmonic transition state theory extended to include Goldstone modes, with an atomistic spin Hamiltonian parametrized from density functional theory calculations. We demonstrate that two annihilation mechanisms contribute to the skyrmion stability: At low external magnetic field, escape through the track boundary prevails, but a crossover field exists, above which the collapse in the interior becomes dominant. Considering a Pd/Fe bilayer on an Ir(111) substrate as a well-established model system, the calculated skyrmion lifetime is found to be consistent with reported experimental measurements. Our simulations also show that the Arrhenius pre-exponential factor of escape depends only weakly on the external magnetic field, whereas the pre-exponential factor for collapse is strongly field dependent. Our results open the door for predictive simulations, free from empirical parameters, to aid the design of skyrmion-based information technology.",
author = "Bessarab, {Pavel F.} and M{\"u}ller, {Gideon P.} and Lobanov, {Igor S.} and Rybakov, {Filipp N.} and Kiselev, {Nikolai S.} and Hannes J{\'o}nsson and Uzdin, {Valery M.} and Stefan Bl{\"u}gel and Lars Bergqvist and Anna Delin",
year = "2018",
month = "12",
day = "1",
doi = "10.1038/s41598-018-21623-3",
language = "English",
volume = "8",
pages = "1--10",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",

}

RIS - Download

TY - JOUR

T1 - Lifetime of racetrack skyrmions

AU - Bessarab, Pavel F.

AU - Müller, Gideon P.

AU - Lobanov, Igor S.

AU - Rybakov, Filipp N.

AU - Kiselev, Nikolai S.

AU - Jónsson, Hannes

AU - Uzdin, Valery M.

AU - Blügel, Stefan

AU - Bergqvist, Lars

AU - Delin, Anna

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The skyrmion racetrack is a promising concept for future information technology. There, binary bits are carried by nanoscale spin swirls-skyrmions-driven along magnetic strips. Stability of the skyrmions is a critical issue for realising this technology. Here we demonstrate that the racetrack skyrmion lifetime can be calculated from first principles as a function of temperature, magnetic field and track width. Our method combines harmonic transition state theory extended to include Goldstone modes, with an atomistic spin Hamiltonian parametrized from density functional theory calculations. We demonstrate that two annihilation mechanisms contribute to the skyrmion stability: At low external magnetic field, escape through the track boundary prevails, but a crossover field exists, above which the collapse in the interior becomes dominant. Considering a Pd/Fe bilayer on an Ir(111) substrate as a well-established model system, the calculated skyrmion lifetime is found to be consistent with reported experimental measurements. Our simulations also show that the Arrhenius pre-exponential factor of escape depends only weakly on the external magnetic field, whereas the pre-exponential factor for collapse is strongly field dependent. Our results open the door for predictive simulations, free from empirical parameters, to aid the design of skyrmion-based information technology.

AB - The skyrmion racetrack is a promising concept for future information technology. There, binary bits are carried by nanoscale spin swirls-skyrmions-driven along magnetic strips. Stability of the skyrmions is a critical issue for realising this technology. Here we demonstrate that the racetrack skyrmion lifetime can be calculated from first principles as a function of temperature, magnetic field and track width. Our method combines harmonic transition state theory extended to include Goldstone modes, with an atomistic spin Hamiltonian parametrized from density functional theory calculations. We demonstrate that two annihilation mechanisms contribute to the skyrmion stability: At low external magnetic field, escape through the track boundary prevails, but a crossover field exists, above which the collapse in the interior becomes dominant. Considering a Pd/Fe bilayer on an Ir(111) substrate as a well-established model system, the calculated skyrmion lifetime is found to be consistent with reported experimental measurements. Our simulations also show that the Arrhenius pre-exponential factor of escape depends only weakly on the external magnetic field, whereas the pre-exponential factor for collapse is strongly field dependent. Our results open the door for predictive simulations, free from empirical parameters, to aid the design of skyrmion-based information technology.

UR - http://www.scopus.com/inward/record.url?scp=85042361199&partnerID=8YFLogxK

U2 - 10.1038/s41598-018-21623-3

DO - 10.1038/s41598-018-21623-3

M3 - Article

VL - 8

SP - 1

EP - 10

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 3433

ER -

ID: 18143749