Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route

Autores
Mercante, L. A.; Melo, W .W. M.; Granada, Mara; Troiani, Horacio Esteban; Macedo, W .A. A.; Ardison, J. D.; Vaz, M. G. F.; Novak, M. A.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work we describe the synthesis and characterization of maghemite nanoparticles obtained by a new synthetic route. The material was synthesized using triethylamine as a coprecipitation agent in the presence of the organic ligand N,N0-bis(3,5-di-tert-butyl-catechol)-2,4-diaminotoluene (LCH3). Mössbauer spectrum at 4 K shows typical hyperfine parameters of maghemite and Transmission Electron Microscopy images reveal that the nanoparticles have a mean diameter of 3.9 nm and a narrow size distribution. AC magnetic susceptibility in zero field presents an Arrhenius behavior with unreasonable relaxation parameters due to the strong influence of dipolar interaction. In contrast when the measurements are performed in a 1kOe field, the effect of dipolar interactions becomes negligible and the obtained parameters are in good agreement with the static magnetic properties. The dynamic energy barrier obtained from the AC susceptibility results is larger than the expected from the average size observed by HRTEM results, evidencing the strong influence of the surface contribution to the anisotropy.
Fil: Mercante, L. A.. Universidade Federal Fluminense; Brasil
Fil: Melo, W .W. M.. Universidade Federal do Rio de Janeiro; Brasil
Fil: Granada, Mara. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Macedo, W .A. A.. No especifíca;
Fil: Ardison, J. D.. No especifíca;
Fil: Vaz, M. G. F.. Universidade Federal Fluminense; Brasil
Fil: Novak, M. A.. Universidade Federal do Rio de Janeiro; Brasil
Materia
magnetism
maghemite
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/273066
Acceder
id CONICETDig_70f03c991f72d6e9f10d02a4c786414c
oai_identifier_str oai:ri.conicet.gov.ar:11336/273066
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic routeMercante, L. A.Melo, W .W. M.Granada, MaraTroiani, Horacio EstebanMacedo, W .A. A.Ardison, J. D.Vaz, M. G. F.Novak, M. A.magnetismmaghemitehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In this work we describe the synthesis and characterization of maghemite nanoparticles obtained by a new synthetic route. The material was synthesized using triethylamine as a coprecipitation agent in the presence of the organic ligand N,N0-bis(3,5-di-tert-butyl-catechol)-2,4-diaminotoluene (LCH3). Mössbauer spectrum at 4 K shows typical hyperfine parameters of maghemite and Transmission Electron Microscopy images reveal that the nanoparticles have a mean diameter of 3.9 nm and a narrow size distribution. AC magnetic susceptibility in zero field presents an Arrhenius behavior with unreasonable relaxation parameters due to the strong influence of dipolar interaction. In contrast when the measurements are performed in a 1kOe field, the effect of dipolar interactions becomes negligible and the obtained parameters are in good agreement with the static magnetic properties. The dynamic energy barrier obtained from the AC susceptibility results is larger than the expected from the average size observed by HRTEM results, evidencing the strong influence of the surface contribution to the anisotropy.Fil: Mercante, L. A.. Universidade Federal Fluminense; BrasilFil: Melo, W .W. M.. Universidade Federal do Rio de Janeiro; BrasilFil: Granada, Mara. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Macedo, W .A. A.. No especifíca;Fil: Ardison, J. D.. No especifíca;Fil: Vaz, M. G. F.. Universidade Federal Fluminense; BrasilFil: Novak, M. A.. Universidade Federal do Rio de Janeiro; BrasilElsevier Science2012-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/273066Mercante, L. A.; Melo, W .W. M.; Granada, Mara; Troiani, Horacio Esteban; Macedo, W .A. A.; et al.; Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route; Elsevier Science; Journal of Magnetism and Magnetic Materials; 324; 19; 9-2012; 3029-30330304-8853CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmmm.2012.04.049info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304885312003964info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:09:58Zoai:ri.conicet.gov.ar:11336/273066instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:09:58.289CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
title Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
spellingShingle Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
Mercante, L. A.
magnetism
maghemite
title_short Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
title_full Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
title_fullStr Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
title_full_unstemmed Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
title_sort Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route
dc.creator.none.fl_str_mv Mercante, L. A.
Melo, W .W. M.
Granada, Mara
Troiani, Horacio Esteban
Macedo, W .A. A.
Ardison, J. D.
Vaz, M. G. F.
Novak, M. A.
author Mercante, L. A.
author_facet Mercante, L. A.
Melo, W .W. M.
Granada, Mara
Troiani, Horacio Esteban
Macedo, W .A. A.
Ardison, J. D.
Vaz, M. G. F.
Novak, M. A.
author_role author
author2 Melo, W .W. M.
Granada, Mara
Troiani, Horacio Esteban
Macedo, W .A. A.
Ardison, J. D.
Vaz, M. G. F.
Novak, M. A.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv magnetism
maghemite
topic magnetism
maghemite
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In this work we describe the synthesis and characterization of maghemite nanoparticles obtained by a new synthetic route. The material was synthesized using triethylamine as a coprecipitation agent in the presence of the organic ligand N,N0-bis(3,5-di-tert-butyl-catechol)-2,4-diaminotoluene (LCH3). Mössbauer spectrum at 4 K shows typical hyperfine parameters of maghemite and Transmission Electron Microscopy images reveal that the nanoparticles have a mean diameter of 3.9 nm and a narrow size distribution. AC magnetic susceptibility in zero field presents an Arrhenius behavior with unreasonable relaxation parameters due to the strong influence of dipolar interaction. In contrast when the measurements are performed in a 1kOe field, the effect of dipolar interactions becomes negligible and the obtained parameters are in good agreement with the static magnetic properties. The dynamic energy barrier obtained from the AC susceptibility results is larger than the expected from the average size observed by HRTEM results, evidencing the strong influence of the surface contribution to the anisotropy.
Fil: Mercante, L. A.. Universidade Federal Fluminense; Brasil
Fil: Melo, W .W. M.. Universidade Federal do Rio de Janeiro; Brasil
Fil: Granada, Mara. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Macedo, W .A. A.. No especifíca;
Fil: Ardison, J. D.. No especifíca;
Fil: Vaz, M. G. F.. Universidade Federal Fluminense; Brasil
Fil: Novak, M. A.. Universidade Federal do Rio de Janeiro; Brasil
description In this work we describe the synthesis and characterization of maghemite nanoparticles obtained by a new synthetic route. The material was synthesized using triethylamine as a coprecipitation agent in the presence of the organic ligand N,N0-bis(3,5-di-tert-butyl-catechol)-2,4-diaminotoluene (LCH3). Mössbauer spectrum at 4 K shows typical hyperfine parameters of maghemite and Transmission Electron Microscopy images reveal that the nanoparticles have a mean diameter of 3.9 nm and a narrow size distribution. AC magnetic susceptibility in zero field presents an Arrhenius behavior with unreasonable relaxation parameters due to the strong influence of dipolar interaction. In contrast when the measurements are performed in a 1kOe field, the effect of dipolar interactions becomes negligible and the obtained parameters are in good agreement with the static magnetic properties. The dynamic energy barrier obtained from the AC susceptibility results is larger than the expected from the average size observed by HRTEM results, evidencing the strong influence of the surface contribution to the anisotropy.
publishDate 2012
dc.date.none.fl_str_mv 2012-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/273066
Mercante, L. A.; Melo, W .W. M.; Granada, Mara; Troiani, Horacio Esteban; Macedo, W .A. A.; et al.; Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route; Elsevier Science; Journal of Magnetism and Magnetic Materials; 324; 19; 9-2012; 3029-3033
0304-8853
CONICET Digital
CONICET
url http://hdl.handle.net/11336/273066
identifier_str_mv Mercante, L. A.; Melo, W .W. M.; Granada, Mara; Troiani, Horacio Esteban; Macedo, W .A. A.; et al.; Magnetic properties of nanoscale crystalline maghemite obtained by a new synthetic route; Elsevier Science; Journal of Magnetism and Magnetic Materials; 324; 19; 9-2012; 3029-3033
0304-8853
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmmm.2012.04.049
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304885312003964
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846083247581167616
score 13.22299

Publicaciones similares