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    Steady motion of skyrmions and domains walls under diffusive spin torques

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    PhysRevB.95.104406.pdf
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    Type
    Article
    Authors
    Elías, Ricardo Gabriel
    Vidal-Silva, Nicolas
    Manchon, Aurelien cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Spintronics Theory Group
    Date
    2017-03-08
    Permanent link to this record
    http://hdl.handle.net/10754/623108
    
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    Abstract
    We explore the role of the spin diffusion of conducting electrons in two-dimensional magnetic textures (domain walls and skyrmions) with spatial variation of the order of the spin precession length λex. The effect of diffusion reflects in four additional torques that are third order in spatial derivatives of magnetization and bilinear in λex and in the nonadiabatic parameter β′. In order to study the dynamics of the solitons when these diffusive torques are present, we derive the Thiele equation in the limit of steady motion and we compare the results with the nondiffusive limit. When considering a homogenous current these torques increase the longitudinal velocity of transverse domain walls of width Δ by a factor (λex/Δ)2(α/3), α being the magnetic damping constant. In the case of single skyrmions with core radius r0 these new contributions tend to increase the Magnus effect in an amount proportional to (λex/r0)2(1+2αβ′).
    Citation
    Elías RG, Vidal-Silva N, Manchon A (2017) Steady motion of skyrmions and domains walls under diffusive spin torques. Physical Review B 95. Available: http://dx.doi.org/10.1103/PhysRevB.95.104406.
    Sponsors
    R.G.E. thanks Conicyt Pai/Concurso Nacional de Apoyo al Retorno de Investigadores/as desde el Extranjero Folio 821320024. N.V.-S. thanks CONICYT-PCHA/Doctorado Nacional/2014-21140141. A.M. was supported by the King Abdullah University of Science and Technology (KAUST).
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/PhysRevB.95.104406
    Additional Links
    http://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.104406
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevB.95.104406
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Spintronics Theory Group; Material Science and Engineering Program

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