Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics

Detalhes bibliográficos
Autor(a) principal: Mesquita, Alexandre [UNESP]
Data de Publicação: 2014
Outros Autores: Estrada, Flávia Regina, Mastelaro, Valmor Roberto, Eiras, José Antonio, Garcia, Ducinei
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://www.scientific.net/AMR.975.29
http://hdl.handle.net/11449/130058
Resumo: In order to characterize the local structure of Pb1-xCaxTiO3 (PCT) samples, Ti K-edge XANES measurements were performed and showed that Ca incorporation to PbTiO3 structure leads to a decreasing of local distortion of Ti atoms in relation to oxygen atoms at the TiO6 octahedra. Moreover, according to EXAFS measurements, the local structure around Ti atoms exhibits tetragonal symmetry with P4mm space group for samples with x <= 0.475, whereas orthorhombic symmetry with Pbnm space group was observed for x equals to 0.50 and 0.55.
id UNSP_5d2b774d030ad88a2ea6fbc3ff4452ad
oai_identifier_str oai:repositorio.unesp.br:11449/130058
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
spelling Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramicsPb1-xCaxTiO3Structural phase transitionXANESEXAFSIn order to characterize the local structure of Pb1-xCaxTiO3 (PCT) samples, Ti K-edge XANES measurements were performed and showed that Ca incorporation to PbTiO3 structure leads to a decreasing of local distortion of Ti atoms in relation to oxygen atoms at the TiO6 octahedra. Moreover, according to EXAFS measurements, the local structure around Ti atoms exhibits tetragonal symmetry with P4mm space group for samples with x <= 0.475, whereas orthorhombic symmetry with Pbnm space group was observed for x equals to 0.50 and 0.55.Universidade Federal de São Carlos, Departamento de FísicaUniversidade de São Paulo, Instituto de Física de São CarlosUniversidade Estadual Paulista, Departamento de Física, Instituto de Geociências e Ciêncas Exatas de Rio ClaroTrans Tech Publications LtdUniversidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Universidade de São Paulo (USP)Mesquita, Alexandre [UNESP]Estrada, Flávia ReginaMastelaro, Valmor RobertoEiras, José AntonioGarcia, Ducinei2015-11-03T15:28:56Z2015-11-03T15:28:56Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject29-35http://www.scientific.net/AMR.975.29Electroceramics Vi. Stafa-zurich: Trans Tech Publications Ltd, v. 975, p. 29-35, 2014.1022-6680http://hdl.handle.net/11449/13005810.4028/www.scientific.net/AMR.975.29WOS:000348023200005Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengElectroceramics Vi0,121info:eu-repo/semantics/openAccess2021-10-23T22:04:35Zoai:repositorio.unesp.br:11449/130058Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:47:32.167777Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
title Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
spellingShingle Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
Mesquita, Alexandre [UNESP]
Pb1-xCaxTiO3
Structural phase transition
XANES
EXAFS
title_short Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
title_full Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
title_fullStr Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
title_full_unstemmed Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
title_sort Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
author Mesquita, Alexandre [UNESP]
author_facet Mesquita, Alexandre [UNESP]
Estrada, Flávia Regina
Mastelaro, Valmor Roberto
Eiras, José Antonio
Garcia, Ducinei
author_role author
author2 Estrada, Flávia Regina
Mastelaro, Valmor Roberto
Eiras, José Antonio
Garcia, Ducinei
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade Federal de São Carlos (UFSCar)
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Mesquita, Alexandre [UNESP]
Estrada, Flávia Regina
Mastelaro, Valmor Roberto
Eiras, José Antonio
Garcia, Ducinei
dc.subject.por.fl_str_mv Pb1-xCaxTiO3
Structural phase transition
XANES
EXAFS
topic Pb1-xCaxTiO3
Structural phase transition
XANES
EXAFS
description In order to characterize the local structure of Pb1-xCaxTiO3 (PCT) samples, Ti K-edge XANES measurements were performed and showed that Ca incorporation to PbTiO3 structure leads to a decreasing of local distortion of Ti atoms in relation to oxygen atoms at the TiO6 octahedra. Moreover, according to EXAFS measurements, the local structure around Ti atoms exhibits tetragonal symmetry with P4mm space group for samples with x <= 0.475, whereas orthorhombic symmetry with Pbnm space group was observed for x equals to 0.50 and 0.55.
publishDate 2014
dc.date.none.fl_str_mv 2014-01-01
2015-11-03T15:28:56Z
2015-11-03T15:28:56Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.scientific.net/AMR.975.29
Electroceramics Vi. Stafa-zurich: Trans Tech Publications Ltd, v. 975, p. 29-35, 2014.
1022-6680
http://hdl.handle.net/11449/130058
10.4028/www.scientific.net/AMR.975.29
WOS:000348023200005
url http://www.scientific.net/AMR.975.29
http://hdl.handle.net/11449/130058
identifier_str_mv Electroceramics Vi. Stafa-zurich: Trans Tech Publications Ltd, v. 975, p. 29-35, 2014.
1022-6680
10.4028/www.scientific.net/AMR.975.29
WOS:000348023200005
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Electroceramics Vi
0,121
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 29-35
dc.publisher.none.fl_str_mv Trans Tech Publications Ltd
publisher.none.fl_str_mv Trans Tech Publications Ltd
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129462380789760

Registros relacionados