Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.apmt.2020.100740 http://hdl.handle.net/11449/209767 |
Resumo: | Charge transport across the interfaces in complex oxides attracts a lot of attention because it allows creating novel functionalities useful for device applications. It has been observed that movable domain walls in epitaxial BiFeO3 films possess enhanced conductivity that can be used for reading out in ferroelectricbased memories. In this work, the relation between the polarization, strain and conductivity in sol-gel BiFeO3 films with special emphasis on grain boundaries as natural interfaces in polycrystalline ferroelectrics is investigated. The interaction between polarization and grain boundaries occuring at elevated temperatures during or after material sintering stage leads to the formation of branched network of highly conductive grain boundaries with the electrical conductivity about two orders higher than in the bulk. At room temperature, these conductive traces stabilized by the defects remain and do not change upon polarization switching. These collective states provide further insight into the physics of complex oxide ferroelectrics and may strongly affect their practical applications, because reveal an additional mechanism of the leakage current in such systems. (c) 2020 Elsevier Ltd. All rights reserved. |
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Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin filmsbismuth ferritegrain boundariesconductivityinterfacesdomain structureCharge transport across the interfaces in complex oxides attracts a lot of attention because it allows creating novel functionalities useful for device applications. It has been observed that movable domain walls in epitaxial BiFeO3 films possess enhanced conductivity that can be used for reading out in ferroelectricbased memories. In this work, the relation between the polarization, strain and conductivity in sol-gel BiFeO3 films with special emphasis on grain boundaries as natural interfaces in polycrystalline ferroelectrics is investigated. The interaction between polarization and grain boundaries occuring at elevated temperatures during or after material sintering stage leads to the formation of branched network of highly conductive grain boundaries with the electrical conductivity about two orders higher than in the bulk. At room temperature, these conductive traces stabilized by the defects remain and do not change upon polarization switching. These collective states provide further insight into the physics of complex oxide ferroelectrics and may strongly affect their practical applications, because reveal an additional mechanism of the leakage current in such systems. (c) 2020 Elsevier Ltd. All rights reserved.Russian Science FoundationFCT/MECFEDERFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Marie Sklodowska-Curie Research and Innovation StaffExchange programDOE BES scientific user facility divisionUral Fed Univ, Sch Nat Sci & Math, Ekaterinburg 620100, RussiaCharles Univ Prague, Fac Math & Phys, Prague 18000 8, Czech RepublicSao Paulo State Univ, Dept Chem & Phys, Ilha Solteira, SP, BrazilFed Inst Educ Sci & Technol Sao Paulo, BR-15503110 Votuporanga, BrazilNatl Acad Sci Ukraine, Inst Problems Mat Sci, UA-03142 Kiev, UkraineOak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USANatl Acad Sci Ukraine, Inst Phys, UA-03028 Kiev, UkraineUniv Aveiro, Dept Phys, P-3810193 Aveiro, PortugalUniv Aveiro, CICECO Aveiro Inst Mat, P-3810193 Aveiro, PortugalSao Paulo State Univ, Dept Chem & Phys, Ilha Solteira, SP, BrazilRussian Science Foundation: 19-72-10076FCT/MEC: UIDB/50011/2020FCT/MEC: UIDP/50011/2020FAPESP: 2017/13769-1CNPq: 304604/2015-1CNPq: 400677/2014-8CAPES: 88881.310513/2018-01Marie Sklodowska-Curie Research and Innovation StaffExchange program: 778070Elsevier B.V.Ural Fed UnivCharles Univ PragueUniversidade Estadual Paulista (Unesp)Fed Inst Educ Sci & Technol Sao PauloNatl Acad Sci UkraineOak Ridge Natl LabUniv AveiroAlikin, DenisFomichov, YevhenReis, Saulo Portes [UNESP]Abramov, AlexanderChezganov, DmitryShur, VladimirEliseev, EugeneKalinin, Sergei V.Morozovska, AnnaAraujo, Eudes B. [UNESP]Kholkin, Andrei2021-06-25T12:28:35Z2021-06-25T12:28:35Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article7http://dx.doi.org/10.1016/j.apmt.2020.100740Applied Materials Today. Amsterdam: Elsevier, v. 20, 7 p., 2020.2352-9407http://hdl.handle.net/11449/20976710.1016/j.apmt.2020.100740WOS:000598355700004Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengApplied Materials Todayinfo:eu-repo/semantics/openAccess2024-07-10T14:07:40Zoai:repositorio.unesp.br:11449/209767Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:35:38.669393Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films |
title |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films |
spellingShingle |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films Alikin, Denis bismuth ferrite grain boundaries conductivity interfaces domain structure |
title_short |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films |
title_full |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films |
title_fullStr |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films |
title_full_unstemmed |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films |
title_sort |
Strain-polarization coupling mechanism of enhanced conductivity at the grain boundaries in BiFeO3 thin films |
author |
Alikin, Denis |
author_facet |
Alikin, Denis Fomichov, Yevhen Reis, Saulo Portes [UNESP] Abramov, Alexander Chezganov, Dmitry Shur, Vladimir Eliseev, Eugene Kalinin, Sergei V. Morozovska, Anna Araujo, Eudes B. [UNESP] Kholkin, Andrei |
author_role |
author |
author2 |
Fomichov, Yevhen Reis, Saulo Portes [UNESP] Abramov, Alexander Chezganov, Dmitry Shur, Vladimir Eliseev, Eugene Kalinin, Sergei V. Morozovska, Anna Araujo, Eudes B. [UNESP] Kholkin, Andrei |
author2_role |
author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Ural Fed Univ Charles Univ Prague Universidade Estadual Paulista (Unesp) Fed Inst Educ Sci & Technol Sao Paulo Natl Acad Sci Ukraine Oak Ridge Natl Lab Univ Aveiro |
dc.contributor.author.fl_str_mv |
Alikin, Denis Fomichov, Yevhen Reis, Saulo Portes [UNESP] Abramov, Alexander Chezganov, Dmitry Shur, Vladimir Eliseev, Eugene Kalinin, Sergei V. Morozovska, Anna Araujo, Eudes B. [UNESP] Kholkin, Andrei |
dc.subject.por.fl_str_mv |
bismuth ferrite grain boundaries conductivity interfaces domain structure |
topic |
bismuth ferrite grain boundaries conductivity interfaces domain structure |
description |
Charge transport across the interfaces in complex oxides attracts a lot of attention because it allows creating novel functionalities useful for device applications. It has been observed that movable domain walls in epitaxial BiFeO3 films possess enhanced conductivity that can be used for reading out in ferroelectricbased memories. In this work, the relation between the polarization, strain and conductivity in sol-gel BiFeO3 films with special emphasis on grain boundaries as natural interfaces in polycrystalline ferroelectrics is investigated. The interaction between polarization and grain boundaries occuring at elevated temperatures during or after material sintering stage leads to the formation of branched network of highly conductive grain boundaries with the electrical conductivity about two orders higher than in the bulk. At room temperature, these conductive traces stabilized by the defects remain and do not change upon polarization switching. These collective states provide further insight into the physics of complex oxide ferroelectrics and may strongly affect their practical applications, because reveal an additional mechanism of the leakage current in such systems. (c) 2020 Elsevier Ltd. All rights reserved. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-01 2021-06-25T12:28:35Z 2021-06-25T12:28:35Z |
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/10.1016/j.apmt.2020.100740 Applied Materials Today. Amsterdam: Elsevier, v. 20, 7 p., 2020. 2352-9407 http://hdl.handle.net/11449/209767 10.1016/j.apmt.2020.100740 WOS:000598355700004 |
url |
http://dx.doi.org/10.1016/j.apmt.2020.100740 http://hdl.handle.net/11449/209767 |
identifier_str_mv |
Applied Materials Today. Amsterdam: Elsevier, v. 20, 7 p., 2020. 2352-9407 10.1016/j.apmt.2020.100740 WOS:000598355700004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Applied Materials Today |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
7 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
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_ |
1808128953256247296 |