Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles

Magnetite nanostructured powder samples were synthesized by aging chemical method. Phase, structural, and magnetic properties were characterized. X-ray diffraction patterns showed cubic magnetite pure phase, with average crystallite size, < D >, equal to 40 nm. Susceptibility measurements show...

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Autores: Lopez Maldonado, K. L., Presa Muñoz De Toro, Patricia Marcela De La, Flores Tavizon, E., Farias Mancilla, J: R:, Matutes Aquino, J. A., Hernando Grande, Antonio, Elizalde Galindo, J. T.
Formato: artículo
Fecha de publicación:2013
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/35545
Acesso em linha:https://hdl.handle.net/20.500.14352/35545
Access Level:acceso abierto
Palavra-chave:538.9
Nanocrystalline magnetite
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
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oai_identifier_str oai:docta.ucm.es:20.500.14352/35545
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spelling Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticlesLopez Maldonado, K. L.Presa Muñoz De Toro, Patricia Marcela De LaFlores Tavizon, E.Farias Mancilla, J: R:Matutes Aquino, J. A.Hernando Grande, AntonioElizalde Galindo, J. T.538.9Nanocrystalline magnetiteFísica de materialesFísica del estado sólido2211 Física del Estado SólidoMagnetite nanostructured powder samples were synthesized by aging chemical method. Phase, structural, and magnetic properties were characterized. X-ray diffraction patterns showed cubic magnetite pure phase, with average crystallite size, < D >, equal to 40 nm. Susceptibility measurements showed the well-known Verwey transition at a temperature of 90 K. The decrease of Verwey transition temperature, with respect to the one reported in literature (125 K) was attributed to the low average crystallite size. Moreover, the spin-glass like transition was observed at 35 K. Activation energy calculated from susceptibility curves, with values ranging from 6.26 to 6.93 meV, showed a dependence of spin-glass transition on frequency. Finally, hysteresis loops showed that there is not an effect of Verwey transition on magnetic properties. On the other hand, a large increase of coercivity and remanent magnetization at a temperature between 5 and 50 K confirmed the presence of a magnetic transition at low temperatures.American Institute of PhysicsUniversidad Complutense de Madrid20132013-05-0720132013-05-07journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/35545reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/355452026-06-02T12:44:21Z
dc.title.none.fl_str_mv Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
title Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
spellingShingle Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
Lopez Maldonado, K. L.
538.9
Nanocrystalline magnetite
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
title_short Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
title_full Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
title_fullStr Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
title_full_unstemmed Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
title_sort Magnetic susceptibility studies of the spin-glass and Verwey transitions in magnetite nanoparticles
dc.creator.none.fl_str_mv Lopez Maldonado, K. L.
Presa Muñoz De Toro, Patricia Marcela De La
Flores Tavizon, E.
Farias Mancilla, J: R:
Matutes Aquino, J. A.
Hernando Grande, Antonio
Elizalde Galindo, J. T.
author Lopez Maldonado, K. L.
author_facet Lopez Maldonado, K. L.
Presa Muñoz De Toro, Patricia Marcela De La
Flores Tavizon, E.
Farias Mancilla, J: R:
Matutes Aquino, J. A.
Hernando Grande, Antonio
Elizalde Galindo, J. T.
author_role author
author2 Presa Muñoz De Toro, Patricia Marcela De La
Flores Tavizon, E.
Farias Mancilla, J: R:
Matutes Aquino, J. A.
Hernando Grande, Antonio
Elizalde Galindo, J. T.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Nanocrystalline magnetite
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
topic 538.9
Nanocrystalline magnetite
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
description Magnetite nanostructured powder samples were synthesized by aging chemical method. Phase, structural, and magnetic properties were characterized. X-ray diffraction patterns showed cubic magnetite pure phase, with average crystallite size, < D >, equal to 40 nm. Susceptibility measurements showed the well-known Verwey transition at a temperature of 90 K. The decrease of Verwey transition temperature, with respect to the one reported in literature (125 K) was attributed to the low average crystallite size. Moreover, the spin-glass like transition was observed at 35 K. Activation energy calculated from susceptibility curves, with values ranging from 6.26 to 6.93 meV, showed a dependence of spin-glass transition on frequency. Finally, hysteresis loops showed that there is not an effect of Verwey transition on magnetic properties. On the other hand, a large increase of coercivity and remanent magnetization at a temperature between 5 and 50 K confirmed the presence of a magnetic transition at low temperatures.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-05-07
2013
2013-05-07
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/20.500.14352/35545
url https://hdl.handle.net/20.500.14352/35545
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 American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
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
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score 15,298079

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