Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study

Ferromagnetic domain patterns and three-dimensional domain-wall configurations in thin CoCrPt films with perpendicular magnetic anisotropy were studied in detail by combining magnetic force microscopy and polarized neutron reflectometry with micromagnetic simulations. With the first method, lateral...

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Autores: Navas, David, Redondo, Carolina, Badini-Confalonieri, G. A., Batallán, Francisco J., Devishvili, Antón, Iglesias-Freire, Óscar, Asenjo Barahona, Agustina, Ross, Caroline A., Toperverg, Boris P.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/181143
Acceso en línea:http://hdl.handle.net/10261/181143
Access Level:acceso abierto
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spelling Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry studyNavas, DavidRedondo, CarolinaBadini-Confalonieri, G. A.Batallán, Francisco J.Devishvili, AntónIglesias-Freire, ÓscarAsenjo Barahona, AgustinaRoss, Caroline A.Toperverg, Boris P.Ferromagnetic domain patterns and three-dimensional domain-wall configurations in thin CoCrPt films with perpendicular magnetic anisotropy were studied in detail by combining magnetic force microscopy and polarized neutron reflectometry with micromagnetic simulations. With the first method, lateral dimension of domains with alternative magnetization directions normal to the surface and separated by domain walls in 20-nm-thick CoCrPt films were determined in good agreement with micromagnetic simulations. Quantitative analysis of data on reflectometry shows that domain walls consist of a Bloch wall in the center of the thin film, which is gradually transformed into a pair of Néel caps at the surfaces. The width and in-depth thickness of the Bloch wall element, transition region, and Néel caps are found consistent with micromagnetic calculations. A complex structure of domain walls serves to compromise a competition between exchange interactions, keeping spins parallel, magnetic anisotropy orienting magnetization normal to the surface, and demagnetizing fields, promoting in-plane magnetization. It is shown that the result of such competition strongly depends on the film thickness, and in the thinner CoCrPt film (10 nm thick), simple Bloch walls separate domains. Their lateral dimensions estimated from neutron scattering experiments agree with micromagnetic simulations.D.N. thanks the Ministerio de Economia y Competitividad (MAT2010-20798-C05-02) and Fundaçao para a Ciência e Tecnologia (Grant No. SFRH/BPD/89808/2012) for financial support and the Institut Laue-Langevin for providing beam time for the PNR experiment and technical support. C.A.R. acknowledges support of C-SPIN, one of six STARnet centers of Microelectronics Advanced Research Corporation (MARCO) and Defense Advanced Research Projects Agency (DARPA).Peer reviewedAmerican Physical SocietyMinisterio de Economía y Competitividad (España)Defense Advanced Research Projects Agency (US)Microelectronics Advanced Research CorporationConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920142019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/181143reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1103/PhysRevB.90.054425Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1811432026-05-22T06:33:51Z
dc.title.none.fl_str_mv Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
title Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
spellingShingle Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
Navas, David
title_short Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
title_full Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
title_fullStr Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
title_full_unstemmed Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
title_sort Domain-wall structure in thin films with perpendicular anisotropy: Magnetic force microscopy and polarized neutron reflectometry study
dc.creator.none.fl_str_mv Navas, David
Redondo, Carolina
Badini-Confalonieri, G. A.
Batallán, Francisco J.
Devishvili, Antón
Iglesias-Freire, Óscar
Asenjo Barahona, Agustina
Ross, Caroline A.
Toperverg, Boris P.
author Navas, David
author_facet Navas, David
Redondo, Carolina
Badini-Confalonieri, G. A.
Batallán, Francisco J.
Devishvili, Antón
Iglesias-Freire, Óscar
Asenjo Barahona, Agustina
Ross, Caroline A.
Toperverg, Boris P.
author_role author
author2 Redondo, Carolina
Badini-Confalonieri, G. A.
Batallán, Francisco J.
Devishvili, Antón
Iglesias-Freire, Óscar
Asenjo Barahona, Agustina
Ross, Caroline A.
Toperverg, Boris P.
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Defense Advanced Research Projects Agency (US)
Microelectronics Advanced Research Corporation
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Ferromagnetic domain patterns and three-dimensional domain-wall configurations in thin CoCrPt films with perpendicular magnetic anisotropy were studied in detail by combining magnetic force microscopy and polarized neutron reflectometry with micromagnetic simulations. With the first method, lateral dimension of domains with alternative magnetization directions normal to the surface and separated by domain walls in 20-nm-thick CoCrPt films were determined in good agreement with micromagnetic simulations. Quantitative analysis of data on reflectometry shows that domain walls consist of a Bloch wall in the center of the thin film, which is gradually transformed into a pair of Néel caps at the surfaces. The width and in-depth thickness of the Bloch wall element, transition region, and Néel caps are found consistent with micromagnetic calculations. A complex structure of domain walls serves to compromise a competition between exchange interactions, keeping spins parallel, magnetic anisotropy orienting magnetization normal to the surface, and demagnetizing fields, promoting in-plane magnetization. It is shown that the result of such competition strongly depends on the film thickness, and in the thinner CoCrPt film (10 nm thick), simple Bloch walls separate domains. Their lateral dimensions estimated from neutron scattering experiments agree with micromagnetic simulations.
publishDate 2014
dc.date.none.fl_str_mv 2014
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/181143
url http://hdl.handle.net/10261/181143
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1103/PhysRevB.90.054425
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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