Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd

Detalhes bibliográficos
Autor(a) principal: Alves,Cleber Santiago
Data de Publicação: 2004
Outros Autores: Gama,Sergio, Coelho,Adelino de Aguiar, Plaza,Edson Jesus Ramirez, Carvalho,Alexandre Magnus Gomes, Cardoso,Lisandro Pavie, Persiano,Aba Cohen
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=S1516-14392004000400005
Resumo: Gd5(Ge1-xSi x), x < 4 based alloys are potential candidates for magnetic refrigeration in the range ~20 - ~290 K. However, one of the greatest obstacles for the use of that technology in large scale is the utilization of high pure Gd metal (99.99 wt. (%)) to produce the GdGeSi alloys, since the impurity elements decrease the intensity of the magnetocaloric effect (EMC)¹. In this work, we prove that annealing of the Gd5Ge2Si2 can promote remarkable values for the EMC in comparison to those obtained for the alloy with high pure Gd. Also, the as cast alloy and the annealed alloy are not monophasic, but have at least two crystalline phases in their microstructure. Results for X-ray analysis, optical and electronic microscopy and magnetization measurements are reported.
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spelling Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gdmagnetocaloric effectmagnetic materialsGdGeSiGd5(Ge1-xSi x), x < 4 based alloys are potential candidates for magnetic refrigeration in the range ~20 - ~290 K. However, one of the greatest obstacles for the use of that technology in large scale is the utilization of high pure Gd metal (99.99 wt. (%)) to produce the GdGeSi alloys, since the impurity elements decrease the intensity of the magnetocaloric effect (EMC)¹. In this work, we prove that annealing of the Gd5Ge2Si2 can promote remarkable values for the EMC in comparison to those obtained for the alloy with high pure Gd. Also, the as cast alloy and the annealed alloy are not monophasic, but have at least two crystalline phases in their microstructure. Results for X-ray analysis, optical and electronic microscopy and magnetization measurements are reported.ABM, ABC, ABPol2004-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000400005Materials Research v.7 n.4 2004reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392004000400005info:eu-repo/semantics/openAccessAlves,Cleber SantiagoGama,SergioCoelho,Adelino de AguiarPlaza,Edson Jesus RamirezCarvalho,Alexandre Magnus GomesCardoso,Lisandro PaviePersiano,Aba Coheneng2005-11-08T00:00:00Zoai:scielo:S1516-14392004000400005Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2005-11-08T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
title Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
spellingShingle Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
Alves,Cleber Santiago
magnetocaloric effect
magnetic materials
GdGeSi
title_short Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
title_full Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
title_fullStr Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
title_full_unstemmed Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
title_sort Giant magnetocaloric effect in Gd5(Si2Ge2) alloy with low purity Gd
author Alves,Cleber Santiago
author_facet Alves,Cleber Santiago
Gama,Sergio
Coelho,Adelino de Aguiar
Plaza,Edson Jesus Ramirez
Carvalho,Alexandre Magnus Gomes
Cardoso,Lisandro Pavie
Persiano,Aba Cohen
author_role author
author2 Gama,Sergio
Coelho,Adelino de Aguiar
Plaza,Edson Jesus Ramirez
Carvalho,Alexandre Magnus Gomes
Cardoso,Lisandro Pavie
Persiano,Aba Cohen
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Alves,Cleber Santiago
Gama,Sergio
Coelho,Adelino de Aguiar
Plaza,Edson Jesus Ramirez
Carvalho,Alexandre Magnus Gomes
Cardoso,Lisandro Pavie
Persiano,Aba Cohen
dc.subject.por.fl_str_mv magnetocaloric effect
magnetic materials
GdGeSi
topic magnetocaloric effect
magnetic materials
GdGeSi
description Gd5(Ge1-xSi x), x < 4 based alloys are potential candidates for magnetic refrigeration in the range ~20 - ~290 K. However, one of the greatest obstacles for the use of that technology in large scale is the utilization of high pure Gd metal (99.99 wt. (%)) to produce the GdGeSi alloys, since the impurity elements decrease the intensity of the magnetocaloric effect (EMC)¹. In this work, we prove that annealing of the Gd5Ge2Si2 can promote remarkable values for the EMC in comparison to those obtained for the alloy with high pure Gd. Also, the as cast alloy and the annealed alloy are not monophasic, but have at least two crystalline phases in their microstructure. Results for X-ray analysis, optical and electronic microscopy and magnetization measurements are reported.
publishDate 2004
dc.date.none.fl_str_mv 2004-12-01
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=S1516-14392004000400005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000400005
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392004000400005
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.7 n.4 2004
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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