Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies

The magnetization reversal processes are discussed for exchange-coupled ferromagnetic hard/soft bilayers made from Co0.66Cr 0.22Pt0.12 (10 and 20 nm)/Ni (from 0 to 40 nm) films with out-of-plane and in-plane magnetic easy axes respectively, based on room temperature hysteresis loops and first-order...

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Autores: Navas, David, Torrejon, J., Béron, F., Redondo, C., Batallán, Francisco J., Toperverg, B.P., Devishvili, A., Sierra, B., Castaño, F., Pirota, K.R., Ross, Caroline A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/377236
Acceso en línea:http://hdl.handle.net/10261/377236
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870407093&doi=10.1088%2f1367-2630%2f14%2f11%2f113001&partnerID=40&md5=2a1d21a4e591576168faaefd263c8374
Access Level:acceso abierto
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spelling Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropiesNavas, DavidTorrejon, J.Béron, F.Redondo, C.Batallán, Francisco J.Toperverg, B.P.Devishvili, A.Sierra, B.Castaño, F.Pirota, K.R.Ross, Caroline A.The magnetization reversal processes are discussed for exchange-coupled ferromagnetic hard/soft bilayers made from Co0.66Cr 0.22Pt0.12 (10 and 20 nm)/Ni (from 0 to 40 nm) films with out-of-plane and in-plane magnetic easy axes respectively, based on room temperature hysteresis loops and first-order reversal curve analysis. On increasing the Ni layer thicknesses, the easy axis of the bilayer reorients from out-of-plane to in-plane. An exchange bias effect, consisting of a shift of the in-plane minor hysteresis loops along the field axis, was observed at room temperature after in-plane saturation. This effect was associated with specific ferromagnetic domain configurations experimentally determined by polarized neutron reflectivity. On the other hand, perpendicular exchange bias effect was revealed from the out-of-plane hysteresis loops and it was attributed to residual domains in the magnetically hard layer. © IOP Publishing and Deutsche Physikalische Gesellschaft.CAR and DN gratefully acknowledge the support of the National Science Foundation and the MIT-Spain/La Cambra de Barcelona Seed Fund. CR and DN thank the Ministerio de Economia y Competitividad for financial support (MAT2010-20798-C05-02).Peer reviewedIOP PublishingConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/377236https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870407093&doi=10.1088%2f1367-2630%2f14%2f11%2f113001&partnerID=40&md5=2a1d21a4e591576168faaefd263c8374reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésNew Journal of Physicshttps://doi.org/0.1088/1367-2630/14/11/113001Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3772362026-05-22T06:33:51Z
dc.title.none.fl_str_mv Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
title Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
spellingShingle Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
Navas, David
title_short Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
title_full Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
title_fullStr Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
title_full_unstemmed Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
title_sort Magnetization reversal and exchange bias effects in hard/soft ferromagnetic bilayers with orthogonal anisotropies
dc.creator.none.fl_str_mv Navas, David
Torrejon, J.
Béron, F.
Redondo, C.
Batallán, Francisco J.
Toperverg, B.P.
Devishvili, A.
Sierra, B.
Castaño, F.
Pirota, K.R.
Ross, Caroline A.
author Navas, David
author_facet Navas, David
Torrejon, J.
Béron, F.
Redondo, C.
Batallán, Francisco J.
Toperverg, B.P.
Devishvili, A.
Sierra, B.
Castaño, F.
Pirota, K.R.
Ross, Caroline A.
author_role author
author2 Torrejon, J.
Béron, F.
Redondo, C.
Batallán, Francisco J.
Toperverg, B.P.
Devishvili, A.
Sierra, B.
Castaño, F.
Pirota, K.R.
Ross, Caroline A.
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description The magnetization reversal processes are discussed for exchange-coupled ferromagnetic hard/soft bilayers made from Co0.66Cr 0.22Pt0.12 (10 and 20 nm)/Ni (from 0 to 40 nm) films with out-of-plane and in-plane magnetic easy axes respectively, based on room temperature hysteresis loops and first-order reversal curve analysis. On increasing the Ni layer thicknesses, the easy axis of the bilayer reorients from out-of-plane to in-plane. An exchange bias effect, consisting of a shift of the in-plane minor hysteresis loops along the field axis, was observed at room temperature after in-plane saturation. This effect was associated with specific ferromagnetic domain configurations experimentally determined by polarized neutron reflectivity. On the other hand, perpendicular exchange bias effect was revealed from the out-of-plane hysteresis loops and it was attributed to residual domains in the magnetically hard layer. © IOP Publishing and Deutsche Physikalische Gesellschaft.
publishDate 2012
dc.date.none.fl_str_mv 2012
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/377236
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870407093&doi=10.1088%2f1367-2630%2f14%2f11%2f113001&partnerID=40&md5=2a1d21a4e591576168faaefd263c8374
url http://hdl.handle.net/10261/377236
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870407093&doi=10.1088%2f1367-2630%2f14%2f11%2f113001&partnerID=40&md5=2a1d21a4e591576168faaefd263c8374
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv New Journal of Physics
https://doi.org/0.1088/1367-2630/14/11/113001
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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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