Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence

Arrays of Ni100-xCux nanowires ranging in composition 0¿=¿x¿=¿75, diameter from 35 to 80¿nm, and length from 150¿nm to 28¿µm have been fabricated by electrochemical co-deposition of Ni and Cu into self-ordered anodic aluminum oxide membranes. As determined by X-ray diffraction and Transmission Elect...

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Detalhes bibliográficos
Autores: Palmero, E.M., Bran, C., Del Real, R.P., Magen, C., Vazquez, M.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:España
Recursos:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:71007
Acesso em linha:http://zaguan.unizar.es/record/71007
Access Level:acceso abierto
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spelling Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependencePalmero, E.M.Bran, C.Del Real, R.P.Magen, C.Vazquez, M.Arrays of Ni100-xCux nanowires ranging in composition 0¿=¿x¿=¿75, diameter from 35 to 80¿nm, and length from 150¿nm to 28¿µm have been fabricated by electrochemical co-deposition of Ni and Cu into self-ordered anodic aluminum oxide membranes. As determined by X-ray diffraction and Transmission Electron Microscopy, the crystalline structure shows fcc cubic symmetry with [111] preferred texture and preferential Ni or Cu lattice depending on the composition. Their magnetic properties such as coercivity and squareness have been determined as a function of composition and geometry in a Vibrating Sample Magnetometer in the temperature range from 10 to 290¿K for applied magnetic fields parallel and perpendicular to the nanowires axis. Addition of Cu into the NiCu alloy up to 50% enhances both parallel coercivity and squareness. For the higher Cu content, these properties decrease and the magnetization easy axis becomes oriented perpendicular to the wires. In addition, coercivity and squareness increase by decreasing the diameter of nanowires which is ascribed to the increase of shape anisotropy. The temperature dependent measurements reflect a complex behavior of the magnetic anisotropy as a result of energy contributions with different evolution with temperature.2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://zaguan.unizar.es/record/71007reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/MINECO/MAT2010-20798-C05-01info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:710072026-05-29T13:59:51Z
dc.title.none.fl_str_mv Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
title Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
spellingShingle Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
Palmero, E.M.
title_short Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
title_full Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
title_fullStr Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
title_full_unstemmed Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
title_sort Magnetic behavior of NiCu nanowire arrays: Compositional, geometry and temperature dependence
dc.creator.none.fl_str_mv Palmero, E.M.
Bran, C.
Del Real, R.P.
Magen, C.
Vazquez, M.
author Palmero, E.M.
author_facet Palmero, E.M.
Bran, C.
Del Real, R.P.
Magen, C.
Vazquez, M.
author_role author
author2 Bran, C.
Del Real, R.P.
Magen, C.
Vazquez, M.
author2_role author
author
author
author
description Arrays of Ni100-xCux nanowires ranging in composition 0¿=¿x¿=¿75, diameter from 35 to 80¿nm, and length from 150¿nm to 28¿µm have been fabricated by electrochemical co-deposition of Ni and Cu into self-ordered anodic aluminum oxide membranes. As determined by X-ray diffraction and Transmission Electron Microscopy, the crystalline structure shows fcc cubic symmetry with [111] preferred texture and preferential Ni or Cu lattice depending on the composition. Their magnetic properties such as coercivity and squareness have been determined as a function of composition and geometry in a Vibrating Sample Magnetometer in the temperature range from 10 to 290¿K for applied magnetic fields parallel and perpendicular to the nanowires axis. Addition of Cu into the NiCu alloy up to 50% enhances both parallel coercivity and squareness. For the higher Cu content, these properties decrease and the magnetization easy axis becomes oriented perpendicular to the wires. In addition, coercivity and squareness increase by decreasing the diameter of nanowires which is ascribed to the increase of shape anisotropy. The temperature dependent measurements reflect a complex behavior of the magnetic anisotropy as a result of energy contributions with different evolution with temperature.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/71007
url http://zaguan.unizar.es/record/71007
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/MINECO/MAT2010-20798-C05-01
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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