Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity
- Autores
- Antonel, Paula Soledad; Berhó, F. M.; Jorge, Guillermo Antonio; Molina, Fernando Víctor
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Magnetic composites of cobalt ferrite nanoparticles and poly(aniline) have been synthesized in acid media and characterized by X-ray diffraction studies, scanning and transmission electron microscopy observation, thermogravimetric analysis, conductivity and infrared spectroscopy measurements. The magnetic behavior was studied through DC magnetization measurements; hysteresis loops were observed, showing ferromagnetic behavior for particles and composites. The remanence ratio increases as the polymer contents increases, the coercivity decreases first and then increases, and the saturation magnetization does not follow the ferrite mass fraction in the composite. It is proposed that an indirect exchange mechanism (RKKY-like) between the nanoparticles and PANI localized spins mediated by the conduction electrons is responsible for the observed magnetic behavior. The results suggest the presence of particle-matrix interactions related to the amount of polymer present, thus, in turn suggesting that the material magnetic properties could be controlled through the nanoparticles to polymer ratio.
Fil: Antonel, Paula Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Berhó, F. M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Jorge, Guillermo Antonio. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina
Fil: Molina, Fernando Víctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina - Materia
-
Magnetic Properties
Nanostructures
Oxides - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/38541
Ver los metadatos del registro completo
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Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivityAntonel, Paula SoledadBerhó, F. M.Jorge, Guillermo AntonioMolina, Fernando VíctorMagnetic PropertiesNanostructuresOxideshttps://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2Magnetic composites of cobalt ferrite nanoparticles and poly(aniline) have been synthesized in acid media and characterized by X-ray diffraction studies, scanning and transmission electron microscopy observation, thermogravimetric analysis, conductivity and infrared spectroscopy measurements. The magnetic behavior was studied through DC magnetization measurements; hysteresis loops were observed, showing ferromagnetic behavior for particles and composites. The remanence ratio increases as the polymer contents increases, the coercivity decreases first and then increases, and the saturation magnetization does not follow the ferrite mass fraction in the composite. It is proposed that an indirect exchange mechanism (RKKY-like) between the nanoparticles and PANI localized spins mediated by the conduction electrons is responsible for the observed magnetic behavior. The results suggest the presence of particle-matrix interactions related to the amount of polymer present, thus, in turn suggesting that the material magnetic properties could be controlled through the nanoparticles to polymer ratio.Fil: Antonel, Paula Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Berhó, F. M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Jorge, Guillermo Antonio. Universidad Nacional de General Sarmiento. Instituto de Ciencias; ArgentinaFil: Molina, Fernando Víctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaElsevier Science Sa2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/38541Antonel, Paula Soledad; Berhó, F. M.; Jorge, Guillermo Antonio; Molina, Fernando Víctor; Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity; Elsevier Science Sa; Synthetic Metals; 199; 1-2015; 292-3020379-6779CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0379677914004378info:eu-repo/semantics/altIdentifier/doi/10.1016/j.synthmet.2014.12.003info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:14Zoai:ri.conicet.gov.ar:11336/38541instacron: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:34982025-09-03 10:06:14.443CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity |
title |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity |
spellingShingle |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity Antonel, Paula Soledad Magnetic Properties Nanostructures Oxides |
title_short |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity |
title_full |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity |
title_fullStr |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity |
title_full_unstemmed |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity |
title_sort |
Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity |
dc.creator.none.fl_str_mv |
Antonel, Paula Soledad Berhó, F. M. Jorge, Guillermo Antonio Molina, Fernando Víctor |
author |
Antonel, Paula Soledad |
author_facet |
Antonel, Paula Soledad Berhó, F. M. Jorge, Guillermo Antonio Molina, Fernando Víctor |
author_role |
author |
author2 |
Berhó, F. M. Jorge, Guillermo Antonio Molina, Fernando Víctor |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Magnetic Properties Nanostructures Oxides |
topic |
Magnetic Properties Nanostructures Oxides |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
Magnetic composites of cobalt ferrite nanoparticles and poly(aniline) have been synthesized in acid media and characterized by X-ray diffraction studies, scanning and transmission electron microscopy observation, thermogravimetric analysis, conductivity and infrared spectroscopy measurements. The magnetic behavior was studied through DC magnetization measurements; hysteresis loops were observed, showing ferromagnetic behavior for particles and composites. The remanence ratio increases as the polymer contents increases, the coercivity decreases first and then increases, and the saturation magnetization does not follow the ferrite mass fraction in the composite. It is proposed that an indirect exchange mechanism (RKKY-like) between the nanoparticles and PANI localized spins mediated by the conduction electrons is responsible for the observed magnetic behavior. The results suggest the presence of particle-matrix interactions related to the amount of polymer present, thus, in turn suggesting that the material magnetic properties could be controlled through the nanoparticles to polymer ratio. Fil: Antonel, Paula Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Berhó, F. M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Jorge, Guillermo Antonio. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina Fil: Molina, Fernando Víctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina |
description |
Magnetic composites of cobalt ferrite nanoparticles and poly(aniline) have been synthesized in acid media and characterized by X-ray diffraction studies, scanning and transmission electron microscopy observation, thermogravimetric analysis, conductivity and infrared spectroscopy measurements. The magnetic behavior was studied through DC magnetization measurements; hysteresis loops were observed, showing ferromagnetic behavior for particles and composites. The remanence ratio increases as the polymer contents increases, the coercivity decreases first and then increases, and the saturation magnetization does not follow the ferrite mass fraction in the composite. It is proposed that an indirect exchange mechanism (RKKY-like) between the nanoparticles and PANI localized spins mediated by the conduction electrons is responsible for the observed magnetic behavior. The results suggest the presence of particle-matrix interactions related to the amount of polymer present, thus, in turn suggesting that the material magnetic properties could be controlled through the nanoparticles to polymer ratio. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01 |
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/11336/38541 Antonel, Paula Soledad; Berhó, F. M.; Jorge, Guillermo Antonio; Molina, Fernando Víctor; Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity; Elsevier Science Sa; Synthetic Metals; 199; 1-2015; 292-302 0379-6779 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/38541 |
identifier_str_mv |
Antonel, Paula Soledad; Berhó, F. M.; Jorge, Guillermo Antonio; Molina, Fernando Víctor; Magnetic composites of CoFe2O4 nanoparticles in a poly(aniline) matrix: Enhancement of remanence ratio and coercivity; Elsevier Science Sa; Synthetic Metals; 199; 1-2015; 292-302 0379-6779 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0379677914004378 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.synthmet.2014.12.003 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science Sa |
publisher.none.fl_str_mv |
Elsevier Science Sa |
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 |
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1842269948194324480 |
score |
13.13397 |