X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field

Detalhes bibliográficos
Autor(a) principal: Remédios,Claudio Marcio Rocha
Data de Publicação: 2003
Outros Autores: Miranda,Marcus Aurélio Ribeiro, Sasaki,José Marcos, Mendes-Filho,Josué, Freire,Paulo de Tarso Cavalcante, Melo,Francisco Erivan de Abreu
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=S1516-14392003000400011
Resumo: Potassium dihydrogen phosphate presents a ferroelectric phase below 122 K and a paraelectric phase for T > 122 K. X-ray scattering measurements were performed in order to verify the mechanism of the phase transition from point group C2v19 to C2v¹19 at 119 K induced by DC electric field; in other words, a change of the local site symmetries of the phosphate group occurs from C2 site in the C2v19 point group to Cs in the C2v¹19 point group. This phenomenon was shown by analyzing the behavior of the integrated intensity of the (800), (080), (1600), (0160), (400) and (040) reflections. The curve fitting of these reflections showed the occurrence of a rotation of the phosphate group around the [010] crystallographic direction during the phase transition. This study confirms the observation of this metastable phase obtained by Raman spectroscopy.
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spelling X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric fieldKDPmetastable phaseX-rayPotassium dihydrogen phosphate presents a ferroelectric phase below 122 K and a paraelectric phase for T > 122 K. X-ray scattering measurements were performed in order to verify the mechanism of the phase transition from point group C2v19 to C2v¹19 at 119 K induced by DC electric field; in other words, a change of the local site symmetries of the phosphate group occurs from C2 site in the C2v19 point group to Cs in the C2v¹19 point group. This phenomenon was shown by analyzing the behavior of the integrated intensity of the (800), (080), (1600), (0160), (400) and (040) reflections. The curve fitting of these reflections showed the occurrence of a rotation of the phosphate group around the [010] crystallographic direction during the phase transition. This study confirms the observation of this metastable phase obtained by Raman spectroscopy.ABM, ABC, ABPol2003-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400011Materials Research v.6 n.4 2003reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392003000400011info:eu-repo/semantics/openAccessRemédios,Claudio Marcio RochaMiranda,Marcus Aurélio RibeiroSasaki,José MarcosMendes-Filho,JosuéFreire,Paulo de Tarso CavalcanteMelo,Francisco Erivan de Abreueng2004-01-20T00:00:00Zoai:scielo:S1516-14392003000400011Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2004-01-20T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
title X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
spellingShingle X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
Remédios,Claudio Marcio Rocha
KDP
metastable phase
X-ray
title_short X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
title_full X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
title_fullStr X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
title_full_unstemmed X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
title_sort X-ray scattering studies of the metastable ferroelectric phase in KDP induced by static electric field
author Remédios,Claudio Marcio Rocha
author_facet Remédios,Claudio Marcio Rocha
Miranda,Marcus Aurélio Ribeiro
Sasaki,José Marcos
Mendes-Filho,Josué
Freire,Paulo de Tarso Cavalcante
Melo,Francisco Erivan de Abreu
author_role author
author2 Miranda,Marcus Aurélio Ribeiro
Sasaki,José Marcos
Mendes-Filho,Josué
Freire,Paulo de Tarso Cavalcante
Melo,Francisco Erivan de Abreu
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Remédios,Claudio Marcio Rocha
Miranda,Marcus Aurélio Ribeiro
Sasaki,José Marcos
Mendes-Filho,Josué
Freire,Paulo de Tarso Cavalcante
Melo,Francisco Erivan de Abreu
dc.subject.por.fl_str_mv KDP
metastable phase
X-ray
topic KDP
metastable phase
X-ray
description Potassium dihydrogen phosphate presents a ferroelectric phase below 122 K and a paraelectric phase for T > 122 K. X-ray scattering measurements were performed in order to verify the mechanism of the phase transition from point group C2v19 to C2v¹19 at 119 K induced by DC electric field; in other words, a change of the local site symmetries of the phosphate group occurs from C2 site in the C2v19 point group to Cs in the C2v¹19 point group. This phenomenon was shown by analyzing the behavior of the integrated intensity of the (800), (080), (1600), (0160), (400) and (040) reflections. The curve fitting of these reflections showed the occurrence of a rotation of the phosphate group around the [010] crystallographic direction during the phase transition. This study confirms the observation of this metastable phase obtained by Raman spectroscopy.
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=S1516-14392003000400011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000400011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392003000400011
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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