Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies

Co-based nanostructures ranging from core/shell to hollow nanoparticles were prepared by varying the reaction time and the chemical environment during the thermal decomposition of Co2(CO)8. Both structural characterization and kinetic model simulation illustrate that the diffusivities of cobalt and...

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Autores: Simeonidis, Konstantinos, Martínez Boubeta, José Carlos, Iglesias, Òscar, Cabot i Codina, Andreu, Angelakeris, Makis, Mourdikoudis, S., Tsiaoussis, I., Delimitis, A., Dendrinou Samara, C., Kalogirou, O.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/122840
Acceso en línea:https://hdl.handle.net/2445/122840
Access Level:acceso abierto
Palabra clave:Nanopartícules
Magnetisme
Nanoparticles
Magnetism
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spelling Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studiesSimeonidis, KonstantinosMartínez Boubeta, José CarlosIglesias, ÒscarCabot i Codina, AndreuAngelakeris, MakisMourdikoudis, S.Tsiaoussis, I.Delimitis, A.Dendrinou Samara, C.Kalogirou, O.NanopartículesMagnetismeNanoparticlesMagnetismCo-based nanostructures ranging from core/shell to hollow nanoparticles were prepared by varying the reaction time and the chemical environment during the thermal decomposition of Co2(CO)8. Both structural characterization and kinetic model simulation illustrate that the diffusivities of cobalt and oxygen determine the growth ratio and the final morphology of the nanoparticles. Exchange coupling between Co and Co-oxide in core/shell nanoparticles induced a shift of field-cooled hysteresis loops that is proportional to the shell thickness, as verified by numerical studies. The increasing nanocomplexity,when passing from core/shell to hollowparticles, also leads to the appearance of hysteresis above 300 K due to an enhancement of the surface anisotropy resulting from the additional spin-disordered surfaces.American Physical Society2018201820112018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion1 p.application/pdfhttps://hdl.handle.net/2445/122840Articles publicats en revistes (Física de la Matèria Condensada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1103/PHYSRevB.84.144430Physical Review B, 2011, vol. 84, p. 144430-1-144430-10https://doi.org/10.1103/PHYSRevB.84.144430(c) American Physical Society, 2011info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1228402026-05-29T05:05:01Z
dc.title.none.fl_str_mv Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
title Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
spellingShingle Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
Simeonidis, Konstantinos
Nanopartícules
Magnetisme
Nanoparticles
Magnetism
title_short Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
title_full Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
title_fullStr Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
title_full_unstemmed Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
title_sort Conditions determining the morphology and nanoscale magnetism of Co nanoparticles: Experimental and numerical studies
dc.creator.none.fl_str_mv Simeonidis, Konstantinos
Martínez Boubeta, José Carlos
Iglesias, Òscar
Cabot i Codina, Andreu
Angelakeris, Makis
Mourdikoudis, S.
Tsiaoussis, I.
Delimitis, A.
Dendrinou Samara, C.
Kalogirou, O.
author Simeonidis, Konstantinos
author_facet Simeonidis, Konstantinos
Martínez Boubeta, José Carlos
Iglesias, Òscar
Cabot i Codina, Andreu
Angelakeris, Makis
Mourdikoudis, S.
Tsiaoussis, I.
Delimitis, A.
Dendrinou Samara, C.
Kalogirou, O.
author_role author
author2 Martínez Boubeta, José Carlos
Iglesias, Òscar
Cabot i Codina, Andreu
Angelakeris, Makis
Mourdikoudis, S.
Tsiaoussis, I.
Delimitis, A.
Dendrinou Samara, C.
Kalogirou, O.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Nanopartícules
Magnetisme
Nanoparticles
Magnetism
topic Nanopartícules
Magnetisme
Nanoparticles
Magnetism
description Co-based nanostructures ranging from core/shell to hollow nanoparticles were prepared by varying the reaction time and the chemical environment during the thermal decomposition of Co2(CO)8. Both structural characterization and kinetic model simulation illustrate that the diffusivities of cobalt and oxygen determine the growth ratio and the final morphology of the nanoparticles. Exchange coupling between Co and Co-oxide in core/shell nanoparticles induced a shift of field-cooled hysteresis loops that is proportional to the shell thickness, as verified by numerical studies. The increasing nanocomplexity,when passing from core/shell to hollowparticles, also leads to the appearance of hysteresis above 300 K due to an enhancement of the surface anisotropy resulting from the additional spin-disordered surfaces.
publishDate 2011
dc.date.none.fl_str_mv 2011
2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/122840
url https://hdl.handle.net/2445/122840
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1103/PHYSRevB.84.144430
Physical Review B, 2011, vol. 84, p. 144430-1-144430-10
https://doi.org/10.1103/PHYSRevB.84.144430
dc.rights.none.fl_str_mv (c) American Physical Society, 2011
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2011
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1 p.
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física de la Matèria Condensada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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