Propriedades estruturais e microestruturais de manganitas dopadas com cobre

Detalhes bibliográficos
Autor(a) principal: Victor,Rodolfo Araujo
Data de Publicação: 2007
Outros Autores: Orlando,Marcos Tadeu D'Azeredo, Freitas,Jair C. C.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000700004
Resumo: We report a structural study on polycrystalline La0.86Sr0.14Mn1-y Cu yO3+delta samples (y = 0, 0.05, 0.10, 0.15, 0.20) using refinement of powder X-ray diffraction data and analysis of scanning electron microscopy images. It is found that the structure remains rhombohedral through the whole series, with a decrease in the average Mn-Mn bond distances, slight variations in Mn-O-Mn angle and reduction in the unit cell volume with increasing Cu amounts. The values of Mn-Mn distances suggest compact structures with d within ±1%. Scanning electron microscopy images reveal homogeneous microstructure in all samples, besides a trend for smaller grains and larger porosity with increasing Cu content.
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spelling Propriedades estruturais e microestruturais de manganitas dopadas com cobremanganitesX-ray diffractionscanning electron microscopyWe report a structural study on polycrystalline La0.86Sr0.14Mn1-y Cu yO3+delta samples (y = 0, 0.05, 0.10, 0.15, 0.20) using refinement of powder X-ray diffraction data and analysis of scanning electron microscopy images. It is found that the structure remains rhombohedral through the whole series, with a decrease in the average Mn-Mn bond distances, slight variations in Mn-O-Mn angle and reduction in the unit cell volume with increasing Cu amounts. The values of Mn-Mn distances suggest compact structures with d within ±1%. Scanning electron microscopy images reveal homogeneous microstructure in all samples, besides a trend for smaller grains and larger porosity with increasing Cu content.Sociedade Brasileira de Química2007-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000700004Química Nova v.30 n.7 2007reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422007000700004info:eu-repo/semantics/openAccessVictor,Rodolfo AraujoOrlando,Marcos Tadeu D'AzeredoFreitas,Jair C. C.por2007-12-11T00:00:00Zoai:scielo:S0100-40422007000700004Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2007-12-11T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Propriedades estruturais e microestruturais de manganitas dopadas com cobre
title Propriedades estruturais e microestruturais de manganitas dopadas com cobre
spellingShingle Propriedades estruturais e microestruturais de manganitas dopadas com cobre
Victor,Rodolfo Araujo
manganites
X-ray diffraction
scanning electron microscopy
title_short Propriedades estruturais e microestruturais de manganitas dopadas com cobre
title_full Propriedades estruturais e microestruturais de manganitas dopadas com cobre
title_fullStr Propriedades estruturais e microestruturais de manganitas dopadas com cobre
title_full_unstemmed Propriedades estruturais e microestruturais de manganitas dopadas com cobre
title_sort Propriedades estruturais e microestruturais de manganitas dopadas com cobre
author Victor,Rodolfo Araujo
author_facet Victor,Rodolfo Araujo
Orlando,Marcos Tadeu D'Azeredo
Freitas,Jair C. C.
author_role author
author2 Orlando,Marcos Tadeu D'Azeredo
Freitas,Jair C. C.
author2_role author
author
dc.contributor.author.fl_str_mv Victor,Rodolfo Araujo
Orlando,Marcos Tadeu D'Azeredo
Freitas,Jair C. C.
dc.subject.por.fl_str_mv manganites
X-ray diffraction
scanning electron microscopy
topic manganites
X-ray diffraction
scanning electron microscopy
description We report a structural study on polycrystalline La0.86Sr0.14Mn1-y Cu yO3+delta samples (y = 0, 0.05, 0.10, 0.15, 0.20) using refinement of powder X-ray diffraction data and analysis of scanning electron microscopy images. It is found that the structure remains rhombohedral through the whole series, with a decrease in the average Mn-Mn bond distances, slight variations in Mn-O-Mn angle and reduction in the unit cell volume with increasing Cu amounts. The values of Mn-Mn distances suggest compact structures with d within ±1%. Scanning electron microscopy images reveal homogeneous microstructure in all samples, besides a trend for smaller grains and larger porosity with increasing Cu content.
publishDate 2007
dc.date.none.fl_str_mv 2007-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000700004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000700004
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422007000700004
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.30 n.7 2007
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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