Giant magnetoresistance and remanence in granular cocu codeposited films

Detalhes bibliográficos
Autor(a) principal: Viegas, Alexandre da Cas
Data de Publicação: 1998
Outros Autores: Geshev, Julian Penkov, Schmidt, Joao Edgar, Ferrari, Edson Fernando
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/95408
Resumo: We present experimental magnetoresistance, magnetization, and remanence data for CoCu granular films obtained by electron beam codeposition, subsequently submitted to a thermal treatment. The magnetization measurements show coexistence of superparamagnetic and ferromagnetic (or blocked superparamagnetic) Co grains. By modeling the experimental magnetization curves, the distribution function of the superparamagnetic particle size, the volume fraction of the blocked part of the Co particles, and their saturation magnetization are obtained. M plots are constructed using the remanence curves. A correlation between the changes of the M parameters and those of the giant magnetoresistance, caused by the annealing, is discussed.
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spelling Viegas, Alexandre da CasGeshev, Julian PenkovSchmidt, Joao EdgarFerrari, Edson Fernando2014-05-20T02:04:50Z19980021-8979http://hdl.handle.net/10183/95408000216699We present experimental magnetoresistance, magnetization, and remanence data for CoCu granular films obtained by electron beam codeposition, subsequently submitted to a thermal treatment. The magnetization measurements show coexistence of superparamagnetic and ferromagnetic (or blocked superparamagnetic) Co grains. By modeling the experimental magnetization curves, the distribution function of the superparamagnetic particle size, the volume fraction of the blocked part of the Co particles, and their saturation magnetization are obtained. M plots are constructed using the remanence curves. A correlation between the changes of the M parameters and those of the giant magnetoresistance, caused by the annealing, is discussed.application/pdfengJournal of Applied Physics. Woodbury. Vol. 83, no. 11 (June 1998), p. 7007-7009Áreas clássicas de fenomenologia e suas aplicaçõesMagnetorresistênciaMagnetismoFilmes finosGiant magnetoresistance and remanence in granular cocu codeposited filmsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000216699.pdf000216699.pdfTexto completo (inglês)application/pdf219717http://www.lume.ufrgs.br/bitstream/10183/95408/1/000216699.pdf44642e911e6976c8e8ca540b52ac15d1MD51TEXT000216699.pdf.txt000216699.pdf.txtExtracted Texttext/plain15077http://www.lume.ufrgs.br/bitstream/10183/95408/2/000216699.pdf.txtac1d47b31823a2ab227f3e8ec97715a6MD52THUMBNAIL000216699.pdf.jpg000216699.pdf.jpgGenerated Thumbnailimage/jpeg1551http://www.lume.ufrgs.br/bitstream/10183/95408/3/000216699.pdf.jpg867787e53cc475522856ac6a06a90434MD5310183/954082024-05-18 06:24:25.068538oai:www.lume.ufrgs.br:10183/95408Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-05-18T09:24:25Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Giant magnetoresistance and remanence in granular cocu codeposited films
title Giant magnetoresistance and remanence in granular cocu codeposited films
spellingShingle Giant magnetoresistance and remanence in granular cocu codeposited films
Viegas, Alexandre da Cas
Áreas clássicas de fenomenologia e suas aplicações
Magnetorresistência
Magnetismo
Filmes finos
title_short Giant magnetoresistance and remanence in granular cocu codeposited films
title_full Giant magnetoresistance and remanence in granular cocu codeposited films
title_fullStr Giant magnetoresistance and remanence in granular cocu codeposited films
title_full_unstemmed Giant magnetoresistance and remanence in granular cocu codeposited films
title_sort Giant magnetoresistance and remanence in granular cocu codeposited films
author Viegas, Alexandre da Cas
author_facet Viegas, Alexandre da Cas
Geshev, Julian Penkov
Schmidt, Joao Edgar
Ferrari, Edson Fernando
author_role author
author2 Geshev, Julian Penkov
Schmidt, Joao Edgar
Ferrari, Edson Fernando
author2_role author
author
author
dc.contributor.author.fl_str_mv Viegas, Alexandre da Cas
Geshev, Julian Penkov
Schmidt, Joao Edgar
Ferrari, Edson Fernando
dc.subject.por.fl_str_mv Áreas clássicas de fenomenologia e suas aplicações
Magnetorresistência
Magnetismo
Filmes finos
topic Áreas clássicas de fenomenologia e suas aplicações
Magnetorresistência
Magnetismo
Filmes finos
description We present experimental magnetoresistance, magnetization, and remanence data for CoCu granular films obtained by electron beam codeposition, subsequently submitted to a thermal treatment. The magnetization measurements show coexistence of superparamagnetic and ferromagnetic (or blocked superparamagnetic) Co grains. By modeling the experimental magnetization curves, the distribution function of the superparamagnetic particle size, the volume fraction of the blocked part of the Co particles, and their saturation magnetization are obtained. M plots are constructed using the remanence curves. A correlation between the changes of the M parameters and those of the giant magnetoresistance, caused by the annealing, is discussed.
publishDate 1998
dc.date.issued.fl_str_mv 1998
dc.date.accessioned.fl_str_mv 2014-05-20T02:04:50Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/95408
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dc.identifier.nrb.pt_BR.fl_str_mv 000216699
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Journal of Applied Physics. Woodbury. Vol. 83, no. 11 (June 1998), p. 7007-7009
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