X-ray-absorption spectroscopy and x-ray diffraction in discontinuous Co/sub x/Fe/sub 1-x//Ag multilayers
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , , , , |
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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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 InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar: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 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/104251 |
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1098-0121 |
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000269716 |
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http://hdl.handle.net/10183/104251 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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