Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy

[EN]The dynamics of magnetic domain walls along ferromagnetic strips with spatially modulated perpendicular magnetic anisotropy are theoretically studied by means of micromagnetic simulations. Ferromagnetic layers with a periodic sawtooth profile of the anisotropy depict a well-defined set of energy...

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Autores: Sánchez-Tejerina, Luis, Alejos Ducal, Óscar, Raposo Funcia, Víctor Javier, Martínez Vecino, Eduardo
Formato: artículo
Fecha de publicación:2018
País:España
Recursos:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/138239
Acesso em linha:http://hdl.handle.net/10366/138239
Access Level:acceso abierto
Palavra-chave:Magnetism
Domain wall
Computational physics
Spin-orbit torque
Magnetic memory
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spelling Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropySánchez-Tejerina, LuisAlejos Ducal, ÓscarRaposo Funcia, Víctor JavierMartínez Vecino, EduardoMagnetismDomain wallComputational physicsSpin-orbit torqueMagnetic memory[EN]The dynamics of magnetic domain walls along ferromagnetic strips with spatially modulated perpendicular magnetic anisotropy are theoretically studied by means of micromagnetic simulations. Ferromagnetic layers with a periodic sawtooth profile of the anisotropy depict a well-defined set of energy minima where the walls are pinned in the absence of external stimuli, and favor the unidirectional propagation of domain walls. The performance of the current-driven domain wall motion along these ratchet-like systems is compared to the field-driven case. Our study indicates that the current-driven domain wall motion exhibits significant improvements with respect to the field-driven case in terms of bit shifting speed and storage density, and therefore, it is suggested for the development of novel devices. The feasibility of these current-driven ratchet devices is studied by means of realistic micromagnetic simulations and supported by a one-dimensional model updated to take into account the periodic sawthooth anisotropy profile. Finally, the current-driven domain wall motion is also evaluated in systems with a triangular modulation of the anisotropy designed to promote the bidirectional shifting of a series of walls, a functionality that cannot be achieved by magnetic fields.Comisión Europea (P7-PEOPLE-2013-ITN 608031) Gobierno de España (MAT2014-52477-C5-4-P, MAT2017-87072-C4-1-P) Junta de Castilla y Leon (SA090U16)American Institute of Physics (College Park, Estados Unidos)201820182018info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10366/138239reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésP7-PEOPLE-2013-ITN 608031MAT2017-87072-C4-1-PMAT2014-52477-C5-4-PSA090U16SA282U14Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1382392026-06-07T06:28:51Z
dc.title.none.fl_str_mv Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
title Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
spellingShingle Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
Sánchez-Tejerina, Luis
Magnetism
Domain wall
Computational physics
Spin-orbit torque
Magnetic memory
title_short Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
title_full Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
title_fullStr Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
title_full_unstemmed Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
title_sort Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
dc.creator.none.fl_str_mv Sánchez-Tejerina, Luis
Alejos Ducal, Óscar
Raposo Funcia, Víctor Javier
Martínez Vecino, Eduardo
author Sánchez-Tejerina, Luis
author_facet Sánchez-Tejerina, Luis
Alejos Ducal, Óscar
Raposo Funcia, Víctor Javier
Martínez Vecino, Eduardo
author_role author
author2 Alejos Ducal, Óscar
Raposo Funcia, Víctor Javier
Martínez Vecino, Eduardo
author2_role author
author
author
dc.subject.none.fl_str_mv Magnetism
Domain wall
Computational physics
Spin-orbit torque
Magnetic memory
topic Magnetism
Domain wall
Computational physics
Spin-orbit torque
Magnetic memory
description [EN]The dynamics of magnetic domain walls along ferromagnetic strips with spatially modulated perpendicular magnetic anisotropy are theoretically studied by means of micromagnetic simulations. Ferromagnetic layers with a periodic sawtooth profile of the anisotropy depict a well-defined set of energy minima where the walls are pinned in the absence of external stimuli, and favor the unidirectional propagation of domain walls. The performance of the current-driven domain wall motion along these ratchet-like systems is compared to the field-driven case. Our study indicates that the current-driven domain wall motion exhibits significant improvements with respect to the field-driven case in terms of bit shifting speed and storage density, and therefore, it is suggested for the development of novel devices. The feasibility of these current-driven ratchet devices is studied by means of realistic micromagnetic simulations and supported by a one-dimensional model updated to take into account the periodic sawthooth anisotropy profile. Finally, the current-driven domain wall motion is also evaluated in systems with a triangular modulation of the anisotropy designed to promote the bidirectional shifting of a series of walls, a functionality that cannot be achieved by magnetic fields.
publishDate 2018
dc.date.none.fl_str_mv 2018
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/10366/138239
url http://hdl.handle.net/10366/138239
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv P7-PEOPLE-2013-ITN 608031
MAT2017-87072-C4-1-P
MAT2014-52477-C5-4-P
SA090U16
SA282U14
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 Institute of Physics (College Park, Estados Unidos)
publisher.none.fl_str_mv American Institute of Physics (College Park, 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_ 1869409103027109888
score 15.300719

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