Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films

[EN]Domain wall dynamics in a perpendicularly magnetized system is studied by means of micromagnetic simulations in which disorder is introduced as a dispersion of both the easy-axis orientation and the anisotropy constant over regions reproducing a granular structure of the material. High field dyn...

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Detalles Bibliográficos
Autores: Voto, Michele, López Díaz, Luis, Torres Rincón, Luis, Moretti, Simone
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/138210
Acceso en línea:http://hdl.handle.net/10366/138210
Access Level:acceso abierto
Palabra clave:Magnetism
Micromagnetism
Domain wall
Computational physics
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spelling Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin filmsVoto, MicheleLópez Díaz, LuisTorres Rincón, LuisMoretti, SimoneMagnetismMicromagnetismDomain wallComputational physics[EN]Domain wall dynamics in a perpendicularly magnetized system is studied by means of micromagnetic simulations in which disorder is introduced as a dispersion of both the easy-axis orientation and the anisotropy constant over regions reproducing a granular structure of the material. High field dynamics show a linear velocity-field relationship and an additional grain size dependent velocity shift, weakly dependent on both applied field and intrinsic Gilbert’s damping parameter. We find the origin of this velocity shift in the nonhomogeneous in-plane effective field generated by the tilting of anisotropy easy axis introduced by disorder. We show that a one-dimensional analytical approach cannot predict the observed velocities and we augment it with the additional dissipation of energy arising from internal domain wall dynamics triggered by disorder. This way we prove that the main cause of higher velocity is the ability of the domain wall to irradiate energy into the domains, acquired with a precise feature of disorder.Comisión Europea (P7-PEOPLE-2013-ITN 608031) Gobierno de España (MAT2014-52477-C5-4-P) Junta de Castilla y León (SA282U14 y SA090U16)American Physical Society (Nueva York, Estados Unidos)201820182016info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10366/138210reponame: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:10366/1382102026-06-07T06:28:51Z
dc.title.none.fl_str_mv Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
title Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
spellingShingle Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
Voto, Michele
Magnetism
Micromagnetism
Domain wall
Computational physics
title_short Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
title_full Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
title_fullStr Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
title_full_unstemmed Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
title_sort Disorder-induced domain wall velocity shift at high fields in perpendicularly magnetized thin films
dc.creator.none.fl_str_mv Voto, Michele
López Díaz, Luis
Torres Rincón, Luis
Moretti, Simone
author Voto, Michele
author_facet Voto, Michele
López Díaz, Luis
Torres Rincón, Luis
Moretti, Simone
author_role author
author2 López Díaz, Luis
Torres Rincón, Luis
Moretti, Simone
author2_role author
author
author
dc.subject.none.fl_str_mv Magnetism
Micromagnetism
Domain wall
Computational physics
topic Magnetism
Micromagnetism
Domain wall
Computational physics
description [EN]Domain wall dynamics in a perpendicularly magnetized system is studied by means of micromagnetic simulations in which disorder is introduced as a dispersion of both the easy-axis orientation and the anisotropy constant over regions reproducing a granular structure of the material. High field dynamics show a linear velocity-field relationship and an additional grain size dependent velocity shift, weakly dependent on both applied field and intrinsic Gilbert’s damping parameter. We find the origin of this velocity shift in the nonhomogeneous in-plane effective field generated by the tilting of anisotropy easy axis introduced by disorder. We show that a one-dimensional analytical approach cannot predict the observed velocities and we augment it with the additional dissipation of energy arising from internal domain wall dynamics triggered by disorder. This way we prove that the main cause of higher velocity is the ability of the domain wall to irradiate energy into the domains, acquired with a precise feature of disorder.
publishDate 2016
dc.date.none.fl_str_mv 2016
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/10366/138210
url http://hdl.handle.net/10366/138210
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 (Nueva York, Estados Unidos)
publisher.none.fl_str_mv American Physical Society (Nueva York, Estados Unidos)
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
_version_ 1869418269638656000
score 15.300724

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