Domain wall pinning at an interface step defect

We study the magnetization of a thin uniaxial ferromagnetic film on a two-sublattice uniaxial antiferromagnetic substrate near an interface step defect. The step defect produces two distinct regions where opposite sublattices of the antiferromagnet adjoin the interface. We show that the proximity in...

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Authors: Carriço, Artur da Silva, Dantas, Ana Lucia
Format: article
Status:Published version
Publication Date:1999
Country:Brasil
Institution:Universidade Federal do Rio Grande do Norte (UFRN)
Repository:Repositório Institucional da UFRN
Language:English
OAI Identifier:oai:repositorio.ufrn.br:123456789/28755
Online Access:https://repositorio.ufrn.br/jspui/handle/123456789/28755
https://doi.org/10.1088/0953-8984/11/13/008
Access Level:Open access
Keyword:Domain wall
Pinning
Interface
Step defect
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spelling Domain wall pinning at an interface step defectDomain wallPinningInterfaceStep defectWe study the magnetization of a thin uniaxial ferromagnetic film on a two-sublattice uniaxial antiferromagnetic substrate near an interface step defect. The step defect produces two distinct regions where opposite sublattices of the antiferromagnet adjoin the interface. We show that the proximity interaction with the substrate leads to the formation and pinning of a Neel domain ́ wall centred at the step edge. The equilibrium pattern is obtained using a numerical procedure which allows for rearrangement of the magnetization of the ferromagnet, which adjusts itself under the effect of the interface field. Our results indicate that the wall profile is rather close to a free- wall pattern; however, the proximity interaction may lead to considerable reduction of the domain wall width. We find that the interface coupling controls the magnetization for weak fields applied along the easy axis. In this case the magnetization results from rigid displacement of the wall, favouring the growth of the domain magnetized in the field direction. The wall detaches from the defect, and the magnetization saturates, when the applied-field strength reaches the value of the interface exchange field associated with the proximity interaction. For a weak external field applied perpendicular to the step edge direction, the magnetization is due to the orientation of the domains in the field direction. In this case saturation occurs for much larger applied-field strength.We study the magnetization of a thin uniaxial ferromagnetic film on a two-sublattice uniaxial antiferromagnetic substrate near an interface step defect. The step defect produces two distinct regions where opposite sublattices of the antiferromagnet adjoin the interface. We show that the proximity interaction with the substrate leads to the formation and pinning of a Neel domain ́ wall centred at the step edge. The equilibrium pattern is obtained using a numerical procedure which allows for rearrangement of the magnetization of the ferromagnet, which adjusts itself under the effect of the interface field. Our results indicate that the wall profile is rather close to a free- wall pattern; however, the proximity interaction may lead to considerable reduction of the domain wall width. We find that the interface coupling controls the magnetization for weak fields applied along the easy axis. In this case the magnetization results from rigid displacement of the wall, favouring the growth of the domain magnetized in the field direction. The wall detaches from the defect, and the magnetization saturates, when the applied-field strength reaches the value of the interface exchange field associated with the proximity interaction. For a weak external field applied perpendicular to the step edge direction, the magnetization is due to the orientation of the domains in the field direction. In this case saturation occurs for much larger applied-field strength.IOP Publishing Ltda2020-04-06T19:18:48Z2020-04-06T19:18:48Z1999info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleCARRIÇO, Artur da Silva; Dantas, Ana Lucia. Journal of Physics. Condensed Matter (Print), v. 11, p. 2707-2717, 1999. ISSN 0953-8984. DOI https://doi.org/10.1088/0953-8984/11/13/008. Disponivel em: https://iopscience.iop.org/article/10.1088/0953-8984/11/13/008. Acesso em: 06 abr 2020.0953-8984https://repositorio.ufrn.br/jspui/handle/123456789/28755https://doi.org/10.1088/0953-8984/11/13/008ark:/41046/001300000901qengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessCarriço, Artur da SilvaDantas, Ana Lucia2022-10-20T19:21:15Zoai:repositorio.ufrn.br:123456789/28755Repositório InstitucionalPUBhttp://repositorio.ufrn.br/oai/repositorio@bczm.ufrn.bropendoar:2022-10-20T19:21:15Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.none.fl_str_mv Domain wall pinning at an interface step defect
title Domain wall pinning at an interface step defect
spellingShingle Domain wall pinning at an interface step defect
Carriço, Artur da Silva
Domain wall
Pinning
Interface
Step defect
title_short Domain wall pinning at an interface step defect
title_full Domain wall pinning at an interface step defect
title_fullStr Domain wall pinning at an interface step defect
title_full_unstemmed Domain wall pinning at an interface step defect
title_sort Domain wall pinning at an interface step defect
dc.creator.none.fl_str_mv Carriço, Artur da Silva
Dantas, Ana Lucia
author Carriço, Artur da Silva
author_facet Carriço, Artur da Silva
Dantas, Ana Lucia
author_role author
author2 Dantas, Ana Lucia
author2_role author
dc.subject.por.fl_str_mv Domain wall
Pinning
Interface
Step defect
topic Domain wall
Pinning
Interface
Step defect
description We study the magnetization of a thin uniaxial ferromagnetic film on a two-sublattice uniaxial antiferromagnetic substrate near an interface step defect. The step defect produces two distinct regions where opposite sublattices of the antiferromagnet adjoin the interface. We show that the proximity interaction with the substrate leads to the formation and pinning of a Neel domain ́ wall centred at the step edge. The equilibrium pattern is obtained using a numerical procedure which allows for rearrangement of the magnetization of the ferromagnet, which adjusts itself under the effect of the interface field. Our results indicate that the wall profile is rather close to a free- wall pattern; however, the proximity interaction may lead to considerable reduction of the domain wall width. We find that the interface coupling controls the magnetization for weak fields applied along the easy axis. In this case the magnetization results from rigid displacement of the wall, favouring the growth of the domain magnetized in the field direction. The wall detaches from the defect, and the magnetization saturates, when the applied-field strength reaches the value of the interface exchange field associated with the proximity interaction. For a weak external field applied perpendicular to the step edge direction, the magnetization is due to the orientation of the domains in the field direction. In this case saturation occurs for much larger applied-field strength.
publishDate 1999
dc.date.none.fl_str_mv 1999
2020-04-06T19:18:48Z
2020-04-06T19:18:48Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv CARRIÇO, Artur da Silva; Dantas, Ana Lucia. Journal of Physics. Condensed Matter (Print), v. 11, p. 2707-2717, 1999. ISSN 0953-8984. DOI https://doi.org/10.1088/0953-8984/11/13/008. Disponivel em: https://iopscience.iop.org/article/10.1088/0953-8984/11/13/008. Acesso em: 06 abr 2020.
0953-8984
https://repositorio.ufrn.br/jspui/handle/123456789/28755
https://doi.org/10.1088/0953-8984/11/13/008
dc.identifier.dark.fl_str_mv ark:/41046/001300000901q
identifier_str_mv CARRIÇO, Artur da Silva; Dantas, Ana Lucia. Journal of Physics. Condensed Matter (Print), v. 11, p. 2707-2717, 1999. ISSN 0953-8984. DOI https://doi.org/10.1088/0953-8984/11/13/008. Disponivel em: https://iopscience.iop.org/article/10.1088/0953-8984/11/13/008. Acesso em: 06 abr 2020.
0953-8984
ark:/41046/001300000901q
url https://repositorio.ufrn.br/jspui/handle/123456789/28755
https://doi.org/10.1088/0953-8984/11/13/008
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IOP Publishing Ltda
publisher.none.fl_str_mv IOP Publishing Ltda
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Repositório Institucional da UFRN
collection Repositório Institucional da UFRN
repository.name.fl_str_mv Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)
repository.mail.fl_str_mv repositorio@bczm.ufrn.br
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score 15.300724

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