Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles

Autores
Lavorato, Gabriel Carlos; Peddis, Davide; Lima, Enio Junior; Troiani, Horacio Esteban; Agostinelli, Elisabetta; Fiorani, Dino; Zysler, Roberto Daniel; Winkler, Elin Lilian
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, we studied the dynamic and static magnetic properties of ZnO-core/CoFe2O4-shell and CoO-core/CoFe2O4-shell nanoparticles. Both systems are formed by a core of ∼4 nm of diameter encapsulated in a shell of ∼2 nm of thickness. The mean blocking temperature changes from 106(7) to 276(5) K when the core is diamagnetic or antiferromagnetic, respectively. Magnetic remanence studies revealed the presence of weak dipolar interparticle interactions, where Hint is approximately -0.1 kOe for ZnO/CoFe2O4 and -0.9 kOe for CoO/CoFe2O4, playing a minor role in the magnetic behavior of the materials. Relaxation experiments provided evidence that the magnetization reversal process of CoFe2O4 is strongly dependent on the magnetic order of the core. At 10 K, activation volumes of ∼46(6) and ∼69(5) nm3 were found for CoO/CoFe2O4 and ZnO/CoFe2O4 nanoparticles, respectively, corresponding to one-third and one-fifth of the total shell volume. While the magnetic behavior of ZnO/CoFe2O4 nanoparticles is strongly affected by the surface disorder, the exchange coupling at the CoO/CoFe2O4 interface rules the magnetization reversal and the nanoparticles' thermal stability by inducing a larger energy barrier and promoting smaller switching volume.
Fil: Lavorato, Gabriel Carlos. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Peddis, Davide. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Lima, Enio Junior. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; 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 Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Agostinelli, Elisabetta. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Fiorani, Dino. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Zysler, Roberto Daniel. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Winkler, Elin Lilian. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Materia
MAGNETIC NANOPARTICLES
EXCHANGE-COUPLING
MAGNETIC ANISOTROPY
INTERPARTICLE INTERACTIONS
INTRAPARTICLE INTERACTIONS
COBALT FERRITE
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:11336/127364
Acceder
id CONICETDig_c164b9133b67e50f16afe41e802a95d3
oai_identifier_str oai:ri.conicet.gov.ar:11336/127364
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic NanoparticlesLavorato, Gabriel CarlosPeddis, DavideLima, Enio JuniorTroiani, Horacio EstebanAgostinelli, ElisabettaFiorani, DinoZysler, Roberto DanielWinkler, Elin LilianMAGNETIC NANOPARTICLESEXCHANGE-COUPLINGMAGNETIC ANISOTROPYINTERPARTICLE INTERACTIONSINTRAPARTICLE INTERACTIONSCOBALT FERRITEhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In this work, we studied the dynamic and static magnetic properties of ZnO-core/CoFe2O4-shell and CoO-core/CoFe2O4-shell nanoparticles. Both systems are formed by a core of ∼4 nm of diameter encapsulated in a shell of ∼2 nm of thickness. The mean blocking temperature changes from 106(7) to 276(5) K when the core is diamagnetic or antiferromagnetic, respectively. Magnetic remanence studies revealed the presence of weak dipolar interparticle interactions, where Hint is approximately -0.1 kOe for ZnO/CoFe2O4 and -0.9 kOe for CoO/CoFe2O4, playing a minor role in the magnetic behavior of the materials. Relaxation experiments provided evidence that the magnetization reversal process of CoFe2O4 is strongly dependent on the magnetic order of the core. At 10 K, activation volumes of ∼46(6) and ∼69(5) nm3 were found for CoO/CoFe2O4 and ZnO/CoFe2O4 nanoparticles, respectively, corresponding to one-third and one-fifth of the total shell volume. While the magnetic behavior of ZnO/CoFe2O4 nanoparticles is strongly affected by the surface disorder, the exchange coupling at the CoO/CoFe2O4 interface rules the magnetization reversal and the nanoparticles' thermal stability by inducing a larger energy barrier and promoting smaller switching volume.Fil: Lavorato, Gabriel Carlos. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Consiglio Nazionale delle Ricerche; ItaliaFil: Peddis, Davide. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; ItaliaFil: Lima, Enio Junior. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; 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 Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Agostinelli, Elisabetta. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; ItaliaFil: Fiorani, Dino. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; ItaliaFil: Zysler, Roberto Daniel. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Winkler, Elin Lilian. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaAmerican Chemical Society2015-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/127364Lavorato, Gabriel Carlos; Peddis, Davide; Lima, Enio Junior; Troiani, Horacio Esteban; Agostinelli, Elisabetta; et al.; Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles; American Chemical Society; Journal of Physical Chemistry C; 119; 27; 7-2015; 15755-157621932-7447CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.5b04448info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/acs.jpcc.5b04448info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:53:33Zoai:ri.conicet.gov.ar:11336/127364instacron: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 09:53:34.187CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
title Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
spellingShingle Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
Lavorato, Gabriel Carlos
MAGNETIC NANOPARTICLES
EXCHANGE-COUPLING
MAGNETIC ANISOTROPY
INTERPARTICLE INTERACTIONS
INTRAPARTICLE INTERACTIONS
COBALT FERRITE
title_short Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
title_full Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
title_fullStr Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
title_full_unstemmed Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
title_sort Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles
dc.creator.none.fl_str_mv Lavorato, Gabriel Carlos
Peddis, Davide
Lima, Enio Junior
Troiani, Horacio Esteban
Agostinelli, Elisabetta
Fiorani, Dino
Zysler, Roberto Daniel
Winkler, Elin Lilian
author Lavorato, Gabriel Carlos
author_facet Lavorato, Gabriel Carlos
Peddis, Davide
Lima, Enio Junior
Troiani, Horacio Esteban
Agostinelli, Elisabetta
Fiorani, Dino
Zysler, Roberto Daniel
Winkler, Elin Lilian
author_role author
author2 Peddis, Davide
Lima, Enio Junior
Troiani, Horacio Esteban
Agostinelli, Elisabetta
Fiorani, Dino
Zysler, Roberto Daniel
Winkler, Elin Lilian
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv MAGNETIC NANOPARTICLES
EXCHANGE-COUPLING
MAGNETIC ANISOTROPY
INTERPARTICLE INTERACTIONS
INTRAPARTICLE INTERACTIONS
COBALT FERRITE
topic MAGNETIC NANOPARTICLES
EXCHANGE-COUPLING
MAGNETIC ANISOTROPY
INTERPARTICLE INTERACTIONS
INTRAPARTICLE INTERACTIONS
COBALT FERRITE
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 studied the dynamic and static magnetic properties of ZnO-core/CoFe2O4-shell and CoO-core/CoFe2O4-shell nanoparticles. Both systems are formed by a core of ∼4 nm of diameter encapsulated in a shell of ∼2 nm of thickness. The mean blocking temperature changes from 106(7) to 276(5) K when the core is diamagnetic or antiferromagnetic, respectively. Magnetic remanence studies revealed the presence of weak dipolar interparticle interactions, where Hint is approximately -0.1 kOe for ZnO/CoFe2O4 and -0.9 kOe for CoO/CoFe2O4, playing a minor role in the magnetic behavior of the materials. Relaxation experiments provided evidence that the magnetization reversal process of CoFe2O4 is strongly dependent on the magnetic order of the core. At 10 K, activation volumes of ∼46(6) and ∼69(5) nm3 were found for CoO/CoFe2O4 and ZnO/CoFe2O4 nanoparticles, respectively, corresponding to one-third and one-fifth of the total shell volume. While the magnetic behavior of ZnO/CoFe2O4 nanoparticles is strongly affected by the surface disorder, the exchange coupling at the CoO/CoFe2O4 interface rules the magnetization reversal and the nanoparticles' thermal stability by inducing a larger energy barrier and promoting smaller switching volume.
Fil: Lavorato, Gabriel Carlos. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Peddis, Davide. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Lima, Enio Junior. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; 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 Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Agostinelli, Elisabetta. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Fiorani, Dino. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consiglio Nazionale delle Ricerche; Italia
Fil: Zysler, Roberto Daniel. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Winkler, Elin Lilian. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Argentine Italian Joint Laboratory of Nanomagnetism; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
description In this work, we studied the dynamic and static magnetic properties of ZnO-core/CoFe2O4-shell and CoO-core/CoFe2O4-shell nanoparticles. Both systems are formed by a core of ∼4 nm of diameter encapsulated in a shell of ∼2 nm of thickness. The mean blocking temperature changes from 106(7) to 276(5) K when the core is diamagnetic or antiferromagnetic, respectively. Magnetic remanence studies revealed the presence of weak dipolar interparticle interactions, where Hint is approximately -0.1 kOe for ZnO/CoFe2O4 and -0.9 kOe for CoO/CoFe2O4, playing a minor role in the magnetic behavior of the materials. Relaxation experiments provided evidence that the magnetization reversal process of CoFe2O4 is strongly dependent on the magnetic order of the core. At 10 K, activation volumes of ∼46(6) and ∼69(5) nm3 were found for CoO/CoFe2O4 and ZnO/CoFe2O4 nanoparticles, respectively, corresponding to one-third and one-fifth of the total shell volume. While the magnetic behavior of ZnO/CoFe2O4 nanoparticles is strongly affected by the surface disorder, the exchange coupling at the CoO/CoFe2O4 interface rules the magnetization reversal and the nanoparticles' thermal stability by inducing a larger energy barrier and promoting smaller switching volume.
publishDate 2015
dc.date.none.fl_str_mv 2015-07
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/11336/127364
Lavorato, Gabriel Carlos; Peddis, Davide; Lima, Enio Junior; Troiani, Horacio Esteban; Agostinelli, Elisabetta; et al.; Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles; American Chemical Society; Journal of Physical Chemistry C; 119; 27; 7-2015; 15755-15762
1932-7447
CONICET Digital
CONICET
url http://hdl.handle.net/11336/127364
identifier_str_mv Lavorato, Gabriel Carlos; Peddis, Davide; Lima, Enio Junior; Troiani, Horacio Esteban; Agostinelli, Elisabetta; et al.; Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles; American Chemical Society; Journal of Physical Chemistry C; 119; 27; 7-2015; 15755-15762
1932-7447
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.5b04448
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/acs.jpcc.5b04448
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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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score 13.13397

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