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Lifetime of racetra...
Lifetime of racetrack skyrmions
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- Bessarab, Pavel F. (author)
- University of Iceland, Iceland;ITMO University, Russia,Univ Iceland, Sci Inst, IS-107 Reykjavik, Iceland.;ITMO Univ, St Petersburg 197101, Russia.
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- Müller, Gideon P (author)
- University of Iceland, Iceland;Forschungszentrum Jülich, Germany,Univ Iceland, Sci Inst, IS-107 Reykjavik, Iceland.;Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany.;Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany.;JARA, D-52425 Julich, Germany.
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- Lobanov, Igor S (author)
- ITMO University, Russia,ITMO Univ, St Petersburg 197101, Russia.
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- Rybakov, Filipp N. (author)
- KTH,Statistisk fysik,KTH Royal Institute of Technology, Sweden,KTH Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden.
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- Kiselev, Nikolai S (author)
- Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany.;Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany.;JARA, D-52425 Julich, Germany.
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- Jonsson, Hannes (author)
- University of Iceland, Iceland;Aalto University, Finland,Univ Iceland, Sci Inst, IS-107 Reykjavik, Iceland.;Aalto Univ, FI-00076 Espoo, Finland.
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- Uzdin, Valery M (author)
- ITMO University, Russia; St. Petersburg State University, Russia,ITMO Univ, St Petersburg 197101, Russia.;St Petersburg State Univ, Dept Phys, St Petersburg 198504, Russia.;ITMO Univ, St Petersburg 197101, Russia.
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- Blügel, Stefan (author)
- Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany.;Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany.;JARA, D-52425 Julich, Germany.
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- Bergqvist, Lars, 1976- (author)
- KTH,Tillämpad materialfysik,SeRC - Swedish e-Science Research Centre,KTH Royal Institute of Technology, Sweden,KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, Electrum 229, SE-16440 Kista, Sweden.;KTH Royal Inst Technol, SeRC Swedish E Sci Res Ctr, SE-10044 Stockholm, Sweden.
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- Delin, Anna, 1966- (author)
- Uppsala universitet,KTH,Tillämpad materialfysik,SeRC - Swedish e-Science Research Centre,KTH Royal Institute of Technology, Sweden;Uppsala University, Sweden,Materialteori,KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, Electrum 229, SE-16440 Kista, Sweden.;KTH Royal Inst Technol, SeRC Swedish E Sci Res Ctr, SE-10044 Stockholm, Sweden.
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University of Iceland, Iceland;ITMO University, Russia Univ Iceland, Sci Inst, IS-107 Reykjavik, Iceland;ITMO Univ, St Petersburg 197101, Russia. (creator_code:org_t)
- 2018-02-21
- 2018
- English.
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In: Scientific Reports. - : Springer. - 2045-2322. ; 8
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Condensed Matter Physics
- Kondenserade materians fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Bessarab, Pavel ...
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Müller, Gideon P
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Lobanov, Igor S
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Rybakov, Filipp ...
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Kiselev, Nikolai ...
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Jonsson, Hannes
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Uzdin, Valery M
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Blügel, Stefan
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Bergqvist, Lars, ...
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Delin, Anna, 196 ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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Scientific Repor ...
- By the university
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Linnaeus University
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Royal Institute of Technology
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Uppsala University