Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions

Detalhes bibliográficos
Autor(a) principal: Sá, Artur Domingues Tavares de, 1985-
Data de Publicação: 2013
Tipo de documento: Artigo
Título da fonte: Repositório da Produção Científica e Intelectual da Unicamp
Texto Completo: https://hdl.handle.net/20.500.12733/5645
Resumo: Agradecimentos: The authors acknowledge technical support by C. Clavier, C. Albin, and G. Suteau of the "Plateforme LYonnaise de Recherche sur les Agregats" and by R. Checa of the "Centre Lyonnais de Magnetometrie." A. D. T. S. acknowledges a Grant from the Brazilian CAPES foundation
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spelling Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactionsMagnetoresistênciaNanoestruturaNanomagnetismoSpintrônicaTransporte de spinMagnetoresistanceNanostructuresNanomagnetismSpintronicsSpin transportGiant magnetoresistanceClusterSpin-dependent transportArtigo de pesquisaAgradecimentos: The authors acknowledge technical support by C. Clavier, C. Albin, and G. Suteau of the "Plateforme LYonnaise de Recherche sur les Agregats" and by R. Checa of the "Centre Lyonnais de Magnetometrie." A. D. T. S. acknowledges a Grant from the Brazilian CAPES foundationAbstract: The giant magnetoresistance response of granular systems has since its discovery been described by a simple model based on the geometric orientation of the magnetic moments of adjacent nanoparticles. This model has been proven quite successful in many cases but its being based on decoupled neighboring grains has never been verified as all available studies rely on samples with too high concentration. Here we report on magnetic and magnetotransport measurements of cluster-assembled nanostructures with cobalt clusters around 2.3 nm diameter embedded in copper matrices at different concentrations. The thorough magnetic characterization based on the recently developed "triple fit" method allows the detection of measurable inter-particle interactions and thus assures true superparamagnetic behavior in the most dilute sample. The spintronic response is compared to theory and we show that only at low concentration (0.5 at.% Co) all experiments are consistent and the common theoretical description is appropriate. Increasing the concentration to 2.5 and 5 at.% implies deviations between magnetometry and magnetotransportCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFechadoUNIVERSIDADE ESTADUAL DE CAMPINASSá, Artur Domingues Tavares de, 1985-2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.12733/5645SÁ, Artur Domingues Tavares de. Giant magnetoresistance in cluster-assembled nanostructures: on the influence of inter-particle interactions. Journal of nanoparticle research. Dordrecht : Springer, 2013. Vol. 15, n. 9 (Sept., 2013), n. art. 1968, p. 1-7. Disponível em: https://hdl.handle.net/20.500.12733/5645. Acesso em: 24 mai. 2023.Inglêshttps://repositorio.unicamp.br/acervo/detalhe/1248016reponame:Repositório da Produção Científica e Intelectual da Unicampinstname:Universidade Estadual de Campinas (UNICAMP)instacron:UNICAMPinfo:eu-repo/semantics/openAccess2022-09-22T09:48:37Zoai:https://www.repositorio.unicamp.br/:1248016Repositório InstitucionalPUBhttp://repositorio.unicamp.br/oai/requestreposip@unicamp.bropendoar:2022-09-22T09:48:37Repositório da Produção Científica e Intelectual da Unicamp - Universidade Estadual de Campinas (UNICAMP)false
dc.title.none.fl_str_mv Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
title Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
spellingShingle Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
Sá, Artur Domingues Tavares de, 1985-
Magnetoresistência
Nanoestrutura
Nanomagnetismo
Spintrônica
Transporte de spin
Magnetoresistance
Nanostructures
Nanomagnetism
Spintronics
Spin transport
Giant magnetoresistance
Cluster
Spin-dependent transport
Artigo de pesquisa
title_short Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
title_full Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
title_fullStr Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
title_full_unstemmed Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
title_sort Giant magnetoresistance in cluster-assembled nanostructures : on the influence of inter-particle interactions
author Sá, Artur Domingues Tavares de, 1985-
author_facet Sá, Artur Domingues Tavares de, 1985-
author_role author
dc.contributor.none.fl_str_mv UNIVERSIDADE ESTADUAL DE CAMPINAS
dc.contributor.author.fl_str_mv Sá, Artur Domingues Tavares de, 1985-
dc.subject.por.fl_str_mv Magnetoresistência
Nanoestrutura
Nanomagnetismo
Spintrônica
Transporte de spin
Magnetoresistance
Nanostructures
Nanomagnetism
Spintronics
Spin transport
Giant magnetoresistance
Cluster
Spin-dependent transport
Artigo de pesquisa
topic Magnetoresistência
Nanoestrutura
Nanomagnetismo
Spintrônica
Transporte de spin
Magnetoresistance
Nanostructures
Nanomagnetism
Spintronics
Spin transport
Giant magnetoresistance
Cluster
Spin-dependent transport
Artigo de pesquisa
description Agradecimentos: The authors acknowledge technical support by C. Clavier, C. Albin, and G. Suteau of the "Plateforme LYonnaise de Recherche sur les Agregats" and by R. Checa of the "Centre Lyonnais de Magnetometrie." A. D. T. S. acknowledges a Grant from the Brazilian CAPES foundation
publishDate 2013
dc.date.none.fl_str_mv 2013
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.uri.fl_str_mv https://hdl.handle.net/20.500.12733/5645
SÁ, Artur Domingues Tavares de. Giant magnetoresistance in cluster-assembled nanostructures: on the influence of inter-particle interactions. Journal of nanoparticle research. Dordrecht : Springer, 2013. Vol. 15, n. 9 (Sept., 2013), n. art. 1968, p. 1-7. Disponível em: https://hdl.handle.net/20.500.12733/5645. Acesso em: 24 mai. 2023.
url https://hdl.handle.net/20.500.12733/5645
identifier_str_mv SÁ, Artur Domingues Tavares de. Giant magnetoresistance in cluster-assembled nanostructures: on the influence of inter-particle interactions. Journal of nanoparticle research. Dordrecht : Springer, 2013. Vol. 15, n. 9 (Sept., 2013), n. art. 1968, p. 1-7. Disponível em: https://hdl.handle.net/20.500.12733/5645. Acesso em: 24 mai. 2023.
dc.language.iso.fl_str_mv Inglês
language_invalid_str_mv Inglês
dc.relation.none.fl_str_mv https://repositorio.unicamp.br/acervo/detalhe/1248016
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório da Produção Científica e Intelectual da Unicamp
instname:Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
instname_str Universidade Estadual de Campinas (UNICAMP)
instacron_str UNICAMP
institution UNICAMP
reponame_str Repositório da Produção Científica e Intelectual da Unicamp
collection Repositório da Produção Científica e Intelectual da Unicamp
repository.name.fl_str_mv Repositório da Produção Científica e Intelectual da Unicamp - Universidade Estadual de Campinas (UNICAMP)
repository.mail.fl_str_mv reposip@unicamp.br
_version_ 1766887328642498560

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