Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2

Detalhes bibliográficos
Autor(a) principal: Araújo, José Humberto de
Data de Publicação: 2011
Outros Autores: Cabral, F. A. O., Soares, João Medeiros, Machado, F. L. A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/29313
Resumo: The nature of the magnetic interactions among core-shell nanoparticles of CoFe2O4–CoFe2 having an average particle size of 32 nm were investigated by δm plots. It was found that the interactions are mainly demagnetizing in nature for nanoparticles with core diameters larger than 26 nm. For smaller values of core diameters, the exchange-spring phenomenon takes place due to the exchange-coupling at the core-shell interface. The critical thickness of the shell was estimated to be 7.8 nm. The overall results are in excellent agreement with current theoretical models
id UFRN_30a0a086d2ebd323bf266f1ad48f543d
oai_identifier_str oai:https://repositorio.ufrn.br:123456789/29313
network_acronym_str UFRN
network_name_str Repositório Institucional da UFRN
repository_id_str
spelling Araújo, José Humberto deCabral, F. A. O.Soares, João MedeirosMachado, F. L. A.2020-06-22T14:18:01Z2020-06-22T14:18:01Z2011-02-15SOARES, J.M.; CABRAL, F.A.O.; ARAÚJO, J. H.; MACHADO, F.L A.. Exchange-spring behavior in nanopowders of CoFe2O4?CoFe2. Applied Physics Letters, v. 98, p. 072502-1, 2011. Disponível em: https://aip.scitation.org/doi/10.1063/1.3552677 Acesso em: 18 jun 2020. https://doi.org/10.1063/1.3552677.1077-3118https://repositorio.ufrn.br/jspui/handle/123456789/2931310.1063/1.3552677AIP PublishingExchange-springNanopowdersExchange-spring behavior in nanopowders of CoFe2O4–CoFe2info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleThe nature of the magnetic interactions among core-shell nanoparticles of CoFe2O4–CoFe2 having an average particle size of 32 nm were investigated by δm plots. It was found that the interactions are mainly demagnetizing in nature for nanoparticles with core diameters larger than 26 nm. For smaller values of core diameters, the exchange-spring phenomenon takes place due to the exchange-coupling at the core-shell interface. The critical thickness of the shell was estimated to be 7.8 nm. The overall results are in excellent agreement with current theoretical modelsengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/29313/2/license.txte9597aa2854d128fd968be5edc8a28d9MD52ORIGINALExchange-springBehavior_Araujo_2011.pdfExchange-springBehavior_Araujo_2011.pdfapplication/pdf620277https://repositorio.ufrn.br/bitstream/123456789/29313/1/Exchange-springBehavior_Araujo_2011.pdfa8fef5fe3328b779efe3310e3903de1cMD51TEXTExchange-springBehavior_Araujo_2011.pdf.txtExchange-springBehavior_Araujo_2011.pdf.txtExtracted texttext/plain16308https://repositorio.ufrn.br/bitstream/123456789/29313/3/Exchange-springBehavior_Araujo_2011.pdf.txt27801d11d5a5987662916e12bda5d852MD53THUMBNAILExchange-springBehavior_Araujo_2011.pdf.jpgExchange-springBehavior_Araujo_2011.pdf.jpgGenerated Thumbnailimage/jpeg1752https://repositorio.ufrn.br/bitstream/123456789/29313/4/Exchange-springBehavior_Araujo_2011.pdf.jpg6e8cd2c2109e460b2699b0cfd1d8d45dMD54123456789/293132020-06-28 04:40:52.469oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-06-28T07:40:52Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
spellingShingle Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
Araújo, José Humberto de
Exchange-spring
Nanopowders
title_short Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_full Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_fullStr Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_full_unstemmed Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
title_sort Exchange-spring behavior in nanopowders of CoFe2O4–CoFe2
author Araújo, José Humberto de
author_facet Araújo, José Humberto de
Cabral, F. A. O.
Soares, João Medeiros
Machado, F. L. A.
author_role author
author2 Cabral, F. A. O.
Soares, João Medeiros
Machado, F. L. A.
author2_role author
author
author
dc.contributor.author.fl_str_mv Araújo, José Humberto de
Cabral, F. A. O.
Soares, João Medeiros
Machado, F. L. A.
dc.subject.por.fl_str_mv Exchange-spring
Nanopowders
topic Exchange-spring
Nanopowders
description The nature of the magnetic interactions among core-shell nanoparticles of CoFe2O4–CoFe2 having an average particle size of 32 nm were investigated by δm plots. It was found that the interactions are mainly demagnetizing in nature for nanoparticles with core diameters larger than 26 nm. For smaller values of core diameters, the exchange-spring phenomenon takes place due to the exchange-coupling at the core-shell interface. The critical thickness of the shell was estimated to be 7.8 nm. The overall results are in excellent agreement with current theoretical models
publishDate 2011
dc.date.issued.fl_str_mv 2011-02-15
dc.date.accessioned.fl_str_mv 2020-06-22T14:18:01Z
dc.date.available.fl_str_mv 2020-06-22T14:18:01Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.citation.fl_str_mv SOARES, J.M.; CABRAL, F.A.O.; ARAÚJO, J. H.; MACHADO, F.L A.. Exchange-spring behavior in nanopowders of CoFe2O4?CoFe2. Applied Physics Letters, v. 98, p. 072502-1, 2011. Disponível em: https://aip.scitation.org/doi/10.1063/1.3552677 Acesso em: 18 jun 2020. https://doi.org/10.1063/1.3552677.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/jspui/handle/123456789/29313
dc.identifier.issn.none.fl_str_mv 1077-3118
dc.identifier.doi.none.fl_str_mv 10.1063/1.3552677
identifier_str_mv SOARES, J.M.; CABRAL, F.A.O.; ARAÚJO, J. H.; MACHADO, F.L A.. Exchange-spring behavior in nanopowders of CoFe2O4?CoFe2. Applied Physics Letters, v. 98, p. 072502-1, 2011. Disponível em: https://aip.scitation.org/doi/10.1063/1.3552677 Acesso em: 18 jun 2020. https://doi.org/10.1063/1.3552677.
1077-3118
10.1063/1.3552677
url https://repositorio.ufrn.br/jspui/handle/123456789/29313
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv AIP Publishing
publisher.none.fl_str_mv AIP Publishing
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Repositório Institucional da UFRN
collection Repositório Institucional da UFRN
bitstream.url.fl_str_mv https://repositorio.ufrn.br/bitstream/123456789/29313/2/license.txt
https://repositorio.ufrn.br/bitstream/123456789/29313/1/Exchange-springBehavior_Araujo_2011.pdf
https://repositorio.ufrn.br/bitstream/123456789/29313/3/Exchange-springBehavior_Araujo_2011.pdf.txt
https://repositorio.ufrn.br/bitstream/123456789/29313/4/Exchange-springBehavior_Araujo_2011.pdf.jpg
bitstream.checksum.fl_str_mv e9597aa2854d128fd968be5edc8a28d9
a8fef5fe3328b779efe3310e3903de1c
27801d11d5a5987662916e12bda5d852
6e8cd2c2109e460b2699b0cfd1d8d45d
bitstream.checksumAlgorithm.fl_str_mv MD5
MD5
MD5
MD5
repository.name.fl_str_mv Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)
repository.mail.fl_str_mv
_version_ 1814833021994401792

Registros relacionados