Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling

We analyze the magnetic properties of mechanically ground nanosized Ni particles dispersed in a SiO_2 matrix. Our magnetic characterization of the as-milled samples show the occurrence of two blocking processes and that of non-monotonic milling time evolutions of the magnetic-order temperature, the...

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Detalhes bibliográficos
Autores: González Herrera, Elvira María, Montero, M. I., Cebollada, F., De Julián Fernández, C, Vicent López, José Luis, González, J. M.
Tipo de documento: artigo
Data de publicação:1998
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositório:Docta Complutense
Idioma:inglês
OAI Identifier:oai:docta.ucm.es:20.500.14352/60180
Acesso em linha:https://hdl.handle.net/20.500.14352/60180
Access Level:Acceso aberto
Palavra-chave:538.9
Metal-films
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
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oai_identifier_str oai:docta.ucm.es:20.500.14352/60180
network_acronym_str ES
network_name_str España
repository_id_str
spelling Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball millingGonzález Herrera, Elvira MaríaMontero, M. I.Cebollada, F.De Julián Fernández, CVicent López, José LuisGonzález, J. M.538.9Metal-filmsFísica de materialesFísica del estado sólido2211 Física del Estado SólidoWe analyze the magnetic properties of mechanically ground nanosized Ni particles dispersed in a SiO_2 matrix. Our magnetic characterization of the as-milled samples show the occurrence of two blocking processes and that of non-monotonic milling time evolutions of the magnetic-order temperature, the high-field magnetization and the saturation coercivity. The measured coercivities exhibit giant values and a uniaxial- type temperature dependence. Thermal treatment carried out in the as-prepared samples result in a remarkable coercivity reduction and in an increase of the high-field magnetization. We conclude, on the basis of the consideration of a core (pure Ni) and shell (Ni-Si inhomogeneous alloy) particle structure, that the magnetoelastic anisotropy plays the dominant role in determining the magnetic properties of our particles.E D P SciencesUniversidad Complutense de Madrid19981998-04-0119981998-04-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/60180reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/601802026-06-02T12:44:21Z
dc.title.none.fl_str_mv Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
title Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
spellingShingle Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
González Herrera, Elvira María
538.9
Metal-films
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
title_short Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
title_full Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
title_fullStr Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
title_full_unstemmed Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
title_sort Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball milling
dc.creator.none.fl_str_mv González Herrera, Elvira María
Montero, M. I.
Cebollada, F.
De Julián Fernández, C
Vicent López, José Luis
González, J. M.
author González Herrera, Elvira María
author_facet González Herrera, Elvira María
Montero, M. I.
Cebollada, F.
De Julián Fernández, C
Vicent López, José Luis
González, J. M.
author_role author
author2 Montero, M. I.
Cebollada, F.
De Julián Fernández, C
Vicent López, José Luis
González, J. M.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Metal-films
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
topic 538.9
Metal-films
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
description We analyze the magnetic properties of mechanically ground nanosized Ni particles dispersed in a SiO_2 matrix. Our magnetic characterization of the as-milled samples show the occurrence of two blocking processes and that of non-monotonic milling time evolutions of the magnetic-order temperature, the high-field magnetization and the saturation coercivity. The measured coercivities exhibit giant values and a uniaxial- type temperature dependence. Thermal treatment carried out in the as-prepared samples result in a remarkable coercivity reduction and in an increase of the high-field magnetization. We conclude, on the basis of the consideration of a core (pure Ni) and shell (Ni-Si inhomogeneous alloy) particle structure, that the magnetoelastic anisotropy plays the dominant role in determining the magnetic properties of our particles.
publishDate 1998
dc.date.none.fl_str_mv 1998
1998-04-01
1998
1998-04-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/60180
url https://hdl.handle.net/20.500.14352/60180
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv E D P Sciences
publisher.none.fl_str_mv E D P Sciences
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869408381892034560
score 15.298079

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