Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics

Detalhes bibliográficos
Autor(a) principal: Fraygola,B.
Data de Publicação: 2013
Outros Autores: Coelho,Adelino A., Eiras,J. A.
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=S1516-14392013000500025
Resumo: Multiferroic ceramic solid solutions between the ferroelectric relaxor Pb(Fe2/3W1/3)O3 (PFW) and "normal" ferroelectric PbTiO3 (PT) - PFW-PT have been synthesized by a modified B-site precursor method and characterized by microwave dielectric measurements. A dielectric dispersion occurring in the frequency range of 100MHz-3GHz and in a broad range of temperatures showed to be a powerful tool to detect electrostrictive and magnetostrictive effects. Anomalies in the temperature dependence of the dielectric parameters (fR (characteristic frequency) and the dielectric strength Δε (characteristic of the dispersion)) have been observed at T N and T C for all samples, indicating that the coupling between the ferroelectric and antiferromagnetic orders occurs "via strain" and confirming the high sensitivity of microwave dielectric measurements to probe weak transitions in bulk ceramics.
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spelling Dielectric study at microwave frequencies of phase transitions in multiferroic ceramicsmultiferroiclead iron tungstatemicrowave dielectric spectroscopyphase transitionsMultiferroic ceramic solid solutions between the ferroelectric relaxor Pb(Fe2/3W1/3)O3 (PFW) and "normal" ferroelectric PbTiO3 (PT) - PFW-PT have been synthesized by a modified B-site precursor method and characterized by microwave dielectric measurements. A dielectric dispersion occurring in the frequency range of 100MHz-3GHz and in a broad range of temperatures showed to be a powerful tool to detect electrostrictive and magnetostrictive effects. Anomalies in the temperature dependence of the dielectric parameters (fR (characteristic frequency) and the dielectric strength Δε (characteristic of the dispersion)) have been observed at T N and T C for all samples, indicating that the coupling between the ferroelectric and antiferromagnetic orders occurs "via strain" and confirming the high sensitivity of microwave dielectric measurements to probe weak transitions in bulk ceramics.ABM, ABC, ABPol2013-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000500025Materials Research v.16 n.5 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000113info:eu-repo/semantics/openAccessFraygola,B.Coelho,Adelino A.Eiras,J. A.eng2013-10-18T00:00:00Zoai:scielo:S1516-14392013000500025Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-10-18T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
title Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
spellingShingle Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
Fraygola,B.
multiferroic
lead iron tungstate
microwave dielectric spectroscopy
phase transitions
title_short Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
title_full Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
title_fullStr Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
title_full_unstemmed Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
title_sort Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
author Fraygola,B.
author_facet Fraygola,B.
Coelho,Adelino A.
Eiras,J. A.
author_role author
author2 Coelho,Adelino A.
Eiras,J. A.
author2_role author
author
dc.contributor.author.fl_str_mv Fraygola,B.
Coelho,Adelino A.
Eiras,J. A.
dc.subject.por.fl_str_mv multiferroic
lead iron tungstate
microwave dielectric spectroscopy
phase transitions
topic multiferroic
lead iron tungstate
microwave dielectric spectroscopy
phase transitions
description Multiferroic ceramic solid solutions between the ferroelectric relaxor Pb(Fe2/3W1/3)O3 (PFW) and "normal" ferroelectric PbTiO3 (PT) - PFW-PT have been synthesized by a modified B-site precursor method and characterized by microwave dielectric measurements. A dielectric dispersion occurring in the frequency range of 100MHz-3GHz and in a broad range of temperatures showed to be a powerful tool to detect electrostrictive and magnetostrictive effects. Anomalies in the temperature dependence of the dielectric parameters (fR (characteristic frequency) and the dielectric strength Δε (characteristic of the dispersion)) have been observed at T N and T C for all samples, indicating that the coupling between the ferroelectric and antiferromagnetic orders occurs "via strain" and confirming the high sensitivity of microwave dielectric measurements to probe weak transitions in bulk ceramics.
publishDate 2013
dc.date.none.fl_str_mv 2013-10-01
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=S1516-14392013000500025
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000500025
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392013005000113
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.16 n.5 2013
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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