Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation

Detalhes bibliográficos
Autor(a) principal: Caffarena,Valeska da Rocha
Data de Publicação: 2003
Outros Autores: Ogasawara,Tsuneharu
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400025
Resumo: An investigation was made into the synthesis and magnetic properties of Sm(3-x)Ho xFe5O12 (samarium-holmium-iron) garnet ferrite, as yet absent from the literature. The material in question was synthesized by co-precipitation, starting from hydrated chlorides of rare-earth elements and ferrous sulfate, and the mixed hydroxide co-precipitate was calcined at 1000 °C. Using PVA as a binder, rectangular cross section-shaped compacts were produced by means of steel-die pressing, drying and sintering from 1200 to 1450 °C. The main conclusions of this study were that the coercive force decreases as the sintering temperature increases, and that the effect of substituting holmium for samarium in SmIG is entirely different from that provided by replacing yttrium by gadolinium in YIG, which is the most important result of this work. An in-depth investigation will be necessary to determine the correlation between microstructure/magnetic properties and ceramic processing variables.
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spelling Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitationceramicschemical synthesiselectron microscopymagnetic propertiesgarnet ferriteAn investigation was made into the synthesis and magnetic properties of Sm(3-x)Ho xFe5O12 (samarium-holmium-iron) garnet ferrite, as yet absent from the literature. The material in question was synthesized by co-precipitation, starting from hydrated chlorides of rare-earth elements and ferrous sulfate, and the mixed hydroxide co-precipitate was calcined at 1000 °C. Using PVA as a binder, rectangular cross section-shaped compacts were produced by means of steel-die pressing, drying and sintering from 1200 to 1450 °C. The main conclusions of this study were that the coercive force decreases as the sintering temperature increases, and that the effect of substituting holmium for samarium in SmIG is entirely different from that provided by replacing yttrium by gadolinium in YIG, which is the most important result of this work. An in-depth investigation will be necessary to determine the correlation between microstructure/magnetic properties and ceramic processing variables.ABM, ABC, ABPol2003-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400025Materials Research v.6 n.4 2003reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392003000400025info:eu-repo/semantics/openAccessCaffarena,Valeska da RochaOgasawara,Tsuneharueng2004-01-19T00:00:00Zoai:scielo:S1516-14392003000400025Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2004-01-19T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
title Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
spellingShingle Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
Caffarena,Valeska da Rocha
ceramics
chemical synthesis
electron microscopy
magnetic properties
garnet ferrite
title_short Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
title_full Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
title_fullStr Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
title_full_unstemmed Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
title_sort Microstructure and hysteresis curves of samarium-holmium-iron garnet synthesized by coprecipitation
author Caffarena,Valeska da Rocha
author_facet Caffarena,Valeska da Rocha
Ogasawara,Tsuneharu
author_role author
author2 Ogasawara,Tsuneharu
author2_role author
dc.contributor.author.fl_str_mv Caffarena,Valeska da Rocha
Ogasawara,Tsuneharu
dc.subject.por.fl_str_mv ceramics
chemical synthesis
electron microscopy
magnetic properties
garnet ferrite
topic ceramics
chemical synthesis
electron microscopy
magnetic properties
garnet ferrite
description An investigation was made into the synthesis and magnetic properties of Sm(3-x)Ho xFe5O12 (samarium-holmium-iron) garnet ferrite, as yet absent from the literature. The material in question was synthesized by co-precipitation, starting from hydrated chlorides of rare-earth elements and ferrous sulfate, and the mixed hydroxide co-precipitate was calcined at 1000 °C. Using PVA as a binder, rectangular cross section-shaped compacts were produced by means of steel-die pressing, drying and sintering from 1200 to 1450 °C. The main conclusions of this study were that the coercive force decreases as the sintering temperature increases, and that the effect of substituting holmium for samarium in SmIG is entirely different from that provided by replacing yttrium by gadolinium in YIG, which is the most important result of this work. An in-depth investigation will be necessary to determine the correlation between microstructure/magnetic properties and ceramic processing variables.
publishDate 2003
dc.date.none.fl_str_mv 2003-12-01
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=S1516-14392003000400025
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400025
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392003000400025
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 ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.6 n.4 2003
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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