Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s10854-017-7973-4 http://hdl.handle.net/11449/179288 |
Resumo: | Pure and calcium modified CaxBi(1−x)FeO3 (x = 0.0, 0.1, 0.2, 0.30) thin films were fabricated on Pt(111)/Ti/SiO2/Si substrates by the soft chemical method. The crystal structure and physical properties of polycrystalline Ca2+-doped BiFeO3 samples have been investigated. Structural studies by XRD reveal the co-existence of distorted rhombohedral and tetragonal phases in the highest doped BiFeO3 where enhanced piezoelectric properties are produced by internal strain. XPS results show that the oxidation state of Fe was purely 3+, which is beneficial for producing a piezoelectric film with low leakage current. Piezoelectric properties are improved in the highest Ca-doped sample due to the coexistence in the crystal structure of BFO with a primitive cubic perovskite lattice with four-fold symmetry and a large tetragonal distortion within the crystal domain. This observation introduces piezoelectronics at room temperature by combining electronic conduction with electric and magnetic degrees of freedom which are already present in the multiferroic BiFeO3. |
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Repositório Institucional da UNESP |
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Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric propertiesPure and calcium modified CaxBi(1−x)FeO3 (x = 0.0, 0.1, 0.2, 0.30) thin films were fabricated on Pt(111)/Ti/SiO2/Si substrates by the soft chemical method. The crystal structure and physical properties of polycrystalline Ca2+-doped BiFeO3 samples have been investigated. Structural studies by XRD reveal the co-existence of distorted rhombohedral and tetragonal phases in the highest doped BiFeO3 where enhanced piezoelectric properties are produced by internal strain. XPS results show that the oxidation state of Fe was purely 3+, which is beneficial for producing a piezoelectric film with low leakage current. Piezoelectric properties are improved in the highest Ca-doped sample due to the coexistence in the crystal structure of BFO with a primitive cubic perovskite lattice with four-fold symmetry and a large tetragonal distortion within the crystal domain. This observation introduces piezoelectronics at room temperature by combining electronic conduction with electric and magnetic degrees of freedom which are already present in the multiferroic BiFeO3.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)School of Engineering Sao Paulo State University (Unesp)Institute of Chemistry Sao Paulo State University (Unesp)School of Engineering Sao Paulo State University (Unesp)Institute of Chemistry Sao Paulo State University (Unesp)FAPESP: 2013/07296-2Universidade Estadual Paulista (Unesp)Goncalves, L. F. [UNESP]Rocha, L. S.R. [UNESP]Longo, E. [UNESP]Simões, A. Z. [UNESP]2018-12-11T17:34:34Z2018-12-11T17:34:34Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article784-793application/pdfhttp://dx.doi.org/10.1007/s10854-017-7973-4Journal of Materials Science: Materials in Electronics, v. 29, n. 1, p. 784-793, 2018.1573-482X0957-4522http://hdl.handle.net/11449/17928810.1007/s10854-017-7973-42-s2.0-850319286822-s2.0-85031928682.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Materials Science: Materials in Electronics0,503info:eu-repo/semantics/openAccess2023-12-21T06:25:05Zoai:repositorio.unesp.br:11449/179288Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-21T06:25:05Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties |
title |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties |
spellingShingle |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties Goncalves, L. F. [UNESP] |
title_short |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties |
title_full |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties |
title_fullStr |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties |
title_full_unstemmed |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties |
title_sort |
Calcium doped BiFeO3 films: Rietveld analysis and piezoelectric properties |
author |
Goncalves, L. F. [UNESP] |
author_facet |
Goncalves, L. F. [UNESP] Rocha, L. S.R. [UNESP] Longo, E. [UNESP] Simões, A. Z. [UNESP] |
author_role |
author |
author2 |
Rocha, L. S.R. [UNESP] Longo, E. [UNESP] Simões, A. Z. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Goncalves, L. F. [UNESP] Rocha, L. S.R. [UNESP] Longo, E. [UNESP] Simões, A. Z. [UNESP] |
description |
Pure and calcium modified CaxBi(1−x)FeO3 (x = 0.0, 0.1, 0.2, 0.30) thin films were fabricated on Pt(111)/Ti/SiO2/Si substrates by the soft chemical method. The crystal structure and physical properties of polycrystalline Ca2+-doped BiFeO3 samples have been investigated. Structural studies by XRD reveal the co-existence of distorted rhombohedral and tetragonal phases in the highest doped BiFeO3 where enhanced piezoelectric properties are produced by internal strain. XPS results show that the oxidation state of Fe was purely 3+, which is beneficial for producing a piezoelectric film with low leakage current. Piezoelectric properties are improved in the highest Ca-doped sample due to the coexistence in the crystal structure of BFO with a primitive cubic perovskite lattice with four-fold symmetry and a large tetragonal distortion within the crystal domain. This observation introduces piezoelectronics at room temperature by combining electronic conduction with electric and magnetic degrees of freedom which are already present in the multiferroic BiFeO3. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T17:34:34Z 2018-12-11T17:34:34Z 2018-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s10854-017-7973-4 Journal of Materials Science: Materials in Electronics, v. 29, n. 1, p. 784-793, 2018. 1573-482X 0957-4522 http://hdl.handle.net/11449/179288 10.1007/s10854-017-7973-4 2-s2.0-85031928682 2-s2.0-85031928682.pdf |
url |
http://dx.doi.org/10.1007/s10854-017-7973-4 http://hdl.handle.net/11449/179288 |
identifier_str_mv |
Journal of Materials Science: Materials in Electronics, v. 29, n. 1, p. 784-793, 2018. 1573-482X 0957-4522 10.1007/s10854-017-7973-4 2-s2.0-85031928682 2-s2.0-85031928682.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Materials Science: Materials in Electronics 0,503 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
784-793 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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_ |
1799965361593909248 |