Dynamical depinning of chiral domain walls

[EN] The domain wall depinning field represents the minimum magnetic field needed to move a domain wall, typically pinned by samples' disorder or patterned constrictions. Conventionally, such a field is considered independent on the Gilbert damping since it is assumed to be the field at which t...

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Detalles Bibliográficos
Autores: Moretti, Simone, Voto, Michele, Martínez Vecino, Eduardo
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/138227
Acceso en línea:http://hdl.handle.net/10366/138227
Access Level:acceso abierto
Palabra clave:Domain wall motion
Magnetism
Chiral domain wall
Computational physics
Depinning
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spelling Dynamical depinning of chiral domain wallsMoretti, SimoneVoto, MicheleMartínez Vecino, EduardoDomain wall motionMagnetismChiral domain wallComputational physicsDepinning[EN] The domain wall depinning field represents the minimum magnetic field needed to move a domain wall, typically pinned by samples' disorder or patterned constrictions. Conventionally, such a field is considered independent on the Gilbert damping since it is assumed to be the field at which the Zeeman energy equals the pinning energy barrier (both damping independent). Here we analyze numerically the domain wall depinning field as a function of the Gilbert damping in a system with perpendicular magnetic anisotropy and Dzyaloshinskii-Moriya interaction. Contrary to expectations, we find that the depinning field depends on the Gilbert damping and that it strongly decreases for small damping parameters. We explain this dependence with a simple one-dimensional model and we show that the reduction of the depinning field is related to the finite size of the pinning barriers and to the domain wall internal dynamics, connected to the Dzyaloshinskii-Moriya interaction and the shape anisotropy.Comisión Europea (P7-PEOPLE-2013-ITN 608031) Gobierno de España (MAT2014-52477-C5-4-P) Junta de Castilla y Leon (SA282U14, SA090U16)American Physical Society201820182017info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10366/138227reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésP7-PEOPLE-2013-ITN 608031MAT2014-52477-C5-4-PSA282U14SA090U16Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1382272026-06-07T06:28:51Z
dc.title.none.fl_str_mv Dynamical depinning of chiral domain walls
title Dynamical depinning of chiral domain walls
spellingShingle Dynamical depinning of chiral domain walls
Moretti, Simone
Domain wall motion
Magnetism
Chiral domain wall
Computational physics
Depinning
title_short Dynamical depinning of chiral domain walls
title_full Dynamical depinning of chiral domain walls
title_fullStr Dynamical depinning of chiral domain walls
title_full_unstemmed Dynamical depinning of chiral domain walls
title_sort Dynamical depinning of chiral domain walls
dc.creator.none.fl_str_mv Moretti, Simone
Voto, Michele
Martínez Vecino, Eduardo
author Moretti, Simone
author_facet Moretti, Simone
Voto, Michele
Martínez Vecino, Eduardo
author_role author
author2 Voto, Michele
Martínez Vecino, Eduardo
author2_role author
author
dc.subject.none.fl_str_mv Domain wall motion
Magnetism
Chiral domain wall
Computational physics
Depinning
topic Domain wall motion
Magnetism
Chiral domain wall
Computational physics
Depinning
description [EN] The domain wall depinning field represents the minimum magnetic field needed to move a domain wall, typically pinned by samples' disorder or patterned constrictions. Conventionally, such a field is considered independent on the Gilbert damping since it is assumed to be the field at which the Zeeman energy equals the pinning energy barrier (both damping independent). Here we analyze numerically the domain wall depinning field as a function of the Gilbert damping in a system with perpendicular magnetic anisotropy and Dzyaloshinskii-Moriya interaction. Contrary to expectations, we find that the depinning field depends on the Gilbert damping and that it strongly decreases for small damping parameters. We explain this dependence with a simple one-dimensional model and we show that the reduction of the depinning field is related to the finite size of the pinning barriers and to the domain wall internal dynamics, connected to the Dzyaloshinskii-Moriya interaction and the shape anisotropy.
publishDate 2017
dc.date.none.fl_str_mv 2017
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/138227
url http://hdl.handle.net/10366/138227
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv P7-PEOPLE-2013-ITN 608031
MAT2014-52477-C5-4-P
SA282U14
SA090U16
dc.rights.none.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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