X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers

Detalhes bibliográficos
Autor(a) principal: Flores, Wladimir Hernandez
Data de Publicação: 2000
Outros Autores: Teixeira, Sergio Ribeiro, Cunha, Joao Batista Marimon da, Alves, Maria do Carmo Martins, Tolentino, Hélio Cesar Nogueira, Traverse, Agnes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/104251
Resumo: This paper reports on the structural properties of CoxFe12x /Ag discontinuous multilayers with x 50, 0.3, 0.7, and 1. The evolution of the structural properties has been investigated by x-ray diffraction and x-ray-absorption spectroscopy ~XAS!. Thermal treatments for 10 min at temperatures ranging between 200 and 800°C, lead to breakup of the layers forming a heterogeneous alloy with magnetic clusters embedded in a metallic Ag matrix. The as-deposited Co/Ag presents a high compressive stress, while a slight tensile stress is observed in every other composition. After annealing there is a relaxation of the stress as well as a crystallographic ordering of the magnetic clusters. It is found from XAS measurements that, for the alloys with x 50.3 and 0.7, there is a better-ordered structure around Co than Fe absorbing atoms. We conclude that Co atoms are within the core of the magnetic clusters, while Fe atoms occupy preferentially the interfacial positions near Ag. Co atoms in Co/Ag multilayers have a fcc structure.
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spelling Flores, Wladimir HernandezTeixeira, Sergio RibeiroCunha, Joao Batista Marimon daAlves, Maria do Carmo MartinsTolentino, Hélio Cesar NogueiraTraverse, Agnes2014-10-08T02:11:02Z20001098-0121http://hdl.handle.net/10183/104251000269716This paper reports on the structural properties of CoxFe12x /Ag discontinuous multilayers with x 50, 0.3, 0.7, and 1. The evolution of the structural properties has been investigated by x-ray diffraction and x-ray-absorption spectroscopy ~XAS!. Thermal treatments for 10 min at temperatures ranging between 200 and 800°C, lead to breakup of the layers forming a heterogeneous alloy with magnetic clusters embedded in a metallic Ag matrix. The as-deposited Co/Ag presents a high compressive stress, while a slight tensile stress is observed in every other composition. After annealing there is a relaxation of the stress as well as a crystallographic ordering of the magnetic clusters. It is found from XAS measurements that, for the alloys with x 50.3 and 0.7, there is a better-ordered structure around Co than Fe absorbing atoms. We conclude that Co atoms are within the core of the magnetic clusters, while Fe atoms occupy preferentially the interfacial positions near Ag. Co atoms in Co/Ag multilayers have a fcc structure.application/pdfengPhysical review. B, Condensed matter and materials physics. New York. Vol. 61, no. 5 (Feb. 2000), p. 3286-3296Difração de raios XMulticamadasRecozimentoEspectros de absorção de raios-xRelaxação de tensãoFilmes finos metalicosCobaltoFerroPrataX-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayersEstrangeiroinfo: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:UFRGSORIGINAL000269716.pdf000269716.pdfTexto completo (inglês)application/pdf236007http://www.lume.ufrgs.br/bitstream/10183/104251/1/000269716.pdfb0b9eebe4e66316792e3b58c278408dcMD51TEXT000269716.pdf.txt000269716.pdf.txtExtracted Texttext/plain39309http://www.lume.ufrgs.br/bitstream/10183/104251/2/000269716.pdf.txtbad5ce98d8f9c2090bae70ba1407e00cMD52THUMBNAIL000269716.pdf.jpg000269716.pdf.jpgGenerated Thumbnailimage/jpeg1884http://www.lume.ufrgs.br/bitstream/10183/104251/3/000269716.pdf.jpg015776961fc7d574db9a8bbb453c3441MD5310183/1042512018-10-09 08:11:39.193oai:www.lume.ufrgs.br:10183/104251Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-09T11:11:39Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
title X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
spellingShingle X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
Flores, Wladimir Hernandez
Difração de raios X
Multicamadas
Recozimento
Espectros de absorção de raios-x
Relaxação de tensão
Filmes finos metalicos
Cobalto
Ferro
Prata
title_short X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
title_full X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
title_fullStr X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
title_full_unstemmed X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
title_sort X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
author Flores, Wladimir Hernandez
author_facet Flores, Wladimir Hernandez
Teixeira, Sergio Ribeiro
Cunha, Joao Batista Marimon da
Alves, Maria do Carmo Martins
Tolentino, Hélio Cesar Nogueira
Traverse, Agnes
author_role author
author2 Teixeira, Sergio Ribeiro
Cunha, Joao Batista Marimon da
Alves, Maria do Carmo Martins
Tolentino, Hélio Cesar Nogueira
Traverse, Agnes
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Flores, Wladimir Hernandez
Teixeira, Sergio Ribeiro
Cunha, Joao Batista Marimon da
Alves, Maria do Carmo Martins
Tolentino, Hélio Cesar Nogueira
Traverse, Agnes
dc.subject.por.fl_str_mv Difração de raios X
Multicamadas
Recozimento
Espectros de absorção de raios-x
Relaxação de tensão
Filmes finos metalicos
Cobalto
Ferro
Prata
topic Difração de raios X
Multicamadas
Recozimento
Espectros de absorção de raios-x
Relaxação de tensão
Filmes finos metalicos
Cobalto
Ferro
Prata
description This paper reports on the structural properties of CoxFe12x /Ag discontinuous multilayers with x 50, 0.3, 0.7, and 1. The evolution of the structural properties has been investigated by x-ray diffraction and x-ray-absorption spectroscopy ~XAS!. Thermal treatments for 10 min at temperatures ranging between 200 and 800°C, lead to breakup of the layers forming a heterogeneous alloy with magnetic clusters embedded in a metallic Ag matrix. The as-deposited Co/Ag presents a high compressive stress, while a slight tensile stress is observed in every other composition. After annealing there is a relaxation of the stress as well as a crystallographic ordering of the magnetic clusters. It is found from XAS measurements that, for the alloys with x 50.3 and 0.7, there is a better-ordered structure around Co than Fe absorbing atoms. We conclude that Co atoms are within the core of the magnetic clusters, while Fe atoms occupy preferentially the interfacial positions near Ag. Co atoms in Co/Ag multilayers have a fcc structure.
publishDate 2000
dc.date.issued.fl_str_mv 2000
dc.date.accessioned.fl_str_mv 2014-10-08T02:11:02Z
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review. B, Condensed matter and materials physics. New York. Vol. 61, no. 5 (Feb. 2000), p. 3286-3296
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