Steady motion of skyrmions and domains walls under diffusive spin torques

Handle URI:
http://hdl.handle.net/10754/623108
Title:
Steady motion of skyrmions and domains walls under diffusive spin torques
Authors:
Elías, Ricardo Gabriel; Vidal-Silva, Nicolas; Manchon, Aurelien ( 0000-0002-4768-293X )
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′).
KAUST Department:
Physical Sciences and Engineering (PSE) Division
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.
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
9-Mar-2017
DOI:
10.1103/PhysRevB.95.104406
Type:
Article
ISSN:
2469-9950; 2469-9969
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).
Additional Links:
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.104406
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorElías, Ricardo Gabrielen
dc.contributor.authorVidal-Silva, Nicolasen
dc.contributor.authorManchon, Aurelienen
dc.date.accessioned2017-04-10T07:49:52Z-
dc.date.available2017-04-10T07:49:52Z-
dc.date.issued2017-03-09en
dc.identifier.citationElías 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.en
dc.identifier.issn2469-9950en
dc.identifier.issn2469-9969en
dc.identifier.doi10.1103/PhysRevB.95.104406en
dc.identifier.urihttp://hdl.handle.net/10754/623108-
dc.description.abstractWe 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′).en
dc.description.sponsorshipR.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).en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.104406en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleSteady motion of skyrmions and domains walls under diffusive spin torquesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartamento de Física, CEDENNA, Universidad de Santiago de Chile, Avda. Ecuador 3493, Santiago, , Chileen
kaust.authorManchon, Aurelienen
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