High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics

Detalhes bibliográficos
Autor(a) principal: Guerra,José de los Santos
Data de Publicação: 2004
Outros Autores: Eiras,José Antonio
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=S1516-14392004000200017
Resumo: Dielectric measurements of lanthanum modified lead titanate ceramics were carried out in a frequency and temperature range of 70 ´ 10(6)Hz - 2 ´ 10(9)Hz and 300 K - 420 K, respectively. Dielectric relaxation appears around 7 ´ 10(8)Hz at room temperature, and the maximum of the dielectric relaxation was around 393 K, the transition temperature (Tc). The relaxation frequency passes through a minimum at Tc and the dielectric relaxation exists in both paraelectric and ferroelectric phases. A fitting of the experimental data with the Debye relations gives some keys for understanding the dielectric behavior of such materials.
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spelling High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramicsdielectric relaxationferroelectric ceramicsmicrowave dispersionDielectric measurements of lanthanum modified lead titanate ceramics were carried out in a frequency and temperature range of 70 ´ 10(6)Hz - 2 ´ 10(9)Hz and 300 K - 420 K, respectively. Dielectric relaxation appears around 7 ´ 10(8)Hz at room temperature, and the maximum of the dielectric relaxation was around 393 K, the transition temperature (Tc). The relaxation frequency passes through a minimum at Tc and the dielectric relaxation exists in both paraelectric and ferroelectric phases. A fitting of the experimental data with the Debye relations gives some keys for understanding the dielectric behavior of such materials.ABM, ABC, ABPol2004-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000200017Materials Research v.7 n.2 2004reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392004000200017info:eu-repo/semantics/openAccessGuerra,José de los SantosEiras,José Antonioeng2004-06-29T00:00:00Zoai:scielo:S1516-14392004000200017Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2004-06-29T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
title High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
spellingShingle High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
Guerra,José de los Santos
dielectric relaxation
ferroelectric ceramics
microwave dispersion
title_short High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
title_full High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
title_fullStr High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
title_full_unstemmed High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
title_sort High frequency dielectric relaxation in lanthanum modified PbTiO3 ferroelectric ceramics
author Guerra,José de los Santos
author_facet Guerra,José de los Santos
Eiras,José Antonio
author_role author
author2 Eiras,José Antonio
author2_role author
dc.contributor.author.fl_str_mv Guerra,José de los Santos
Eiras,José Antonio
dc.subject.por.fl_str_mv dielectric relaxation
ferroelectric ceramics
microwave dispersion
topic dielectric relaxation
ferroelectric ceramics
microwave dispersion
description Dielectric measurements of lanthanum modified lead titanate ceramics were carried out in a frequency and temperature range of 70 ´ 10(6)Hz - 2 ´ 10(9)Hz and 300 K - 420 K, respectively. Dielectric relaxation appears around 7 ´ 10(8)Hz at room temperature, and the maximum of the dielectric relaxation was around 393 K, the transition temperature (Tc). The relaxation frequency passes through a minimum at Tc and the dielectric relaxation exists in both paraelectric and ferroelectric phases. A fitting of the experimental data with the Debye relations gives some keys for understanding the dielectric behavior of such materials.
publishDate 2004
dc.date.none.fl_str_mv 2004-06-01
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=S1516-14392004000200017
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000200017
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392004000200017
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.2 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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