Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films

Lead-free (K,Na)NbO3 (KNN) and La doped (K,Na)NbO3 (KNN-La) thin films were grown on SrTiO3 substrates by chemical solution deposition method. The effect of adding different amounts of Na and K excess (0-20 mol%) has been investigated. The results confirm the necessity to add 20 mol% excess amounts...

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Autores: Vendrell, Xavier, Raymond, Oscar, Ochoa Guerrero, Diego A., García García, José Eduardo, Mestres i Vila, Ma. Lourdes
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/127946
Acesso em linha:https://hdl.handle.net/2445/127946
Access Level:acceso abierto
Palavra-chave:Ferroelectricitat
Histèresi
Pel·lícules fines
Piezoelectricitat
Ciència dels materials
Ferroelectricity
Hysteresis
Thin films
Piezoelectricity
Materials science
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spelling Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin filmsVendrell, XavierRaymond, OscarOchoa Guerrero, Diego A.García García, José EduardoMestres i Vila, Ma. LourdesFerroelectricitatHistèresiPel·lícules finesPiezoelectricitatCiència dels materialsFerroelectricityHysteresisThin filmsPiezoelectricityMaterials scienceLead-free (K,Na)NbO3 (KNN) and La doped (K,Na)NbO3 (KNN-La) thin films were grown on SrTiO3 substrates by chemical solution deposition method. The effect of adding different amounts of Na and K excess (0-20 mol%) has been investigated. The results confirm the necessity to add 20 mol% excess amounts of Na and K precursor solutions in order to avoid the formation of the secondary phase, K4Nb6O17, as is confirmed by X-ray diffraction and Raman spectroscopy. Moreover, when adding a 20 mol% of alkaline metal excess the thin films are highly textured with out-of-plane preferential orientation in the [100] direction following the [100] orientation of the substrate. Doping with lanthanum resulted in the decrease in the leakage current density at low electric field, and an increase in the dielectric permittivity across all the temperatures range (80-380 K). Although the (100)-oriented KNN and KNN-La films exhibited rounded hysteresis loops, at low temperature the films showed the typical ferroelectric hysteresis loops.Elsevier B.V.2019201920152019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion7 p.application/pdfhttps://hdl.handle.net/2445/127946Articles publicats en revistes (Química Inorgànica i Orgànica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.tsf.2015.01.038Thin Solid Films, 2015, vol. 577, p. 35-41https://doi.org/10.1016/j.tsf.2015.01.038(c) Elsevier B.V., 2015info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1279462026-05-29T05:05:01Z
dc.title.none.fl_str_mv Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
title Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
spellingShingle Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
Vendrell, Xavier
Ferroelectricitat
Histèresi
Pel·lícules fines
Piezoelectricitat
Ciència dels materials
Ferroelectricity
Hysteresis
Thin films
Piezoelectricity
Materials science
title_short Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
title_full Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
title_fullStr Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
title_full_unstemmed Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
title_sort Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films
dc.creator.none.fl_str_mv Vendrell, Xavier
Raymond, Oscar
Ochoa Guerrero, Diego A.
García García, José Eduardo
Mestres i Vila, Ma. Lourdes
author Vendrell, Xavier
author_facet Vendrell, Xavier
Raymond, Oscar
Ochoa Guerrero, Diego A.
García García, José Eduardo
Mestres i Vila, Ma. Lourdes
author_role author
author2 Raymond, Oscar
Ochoa Guerrero, Diego A.
García García, José Eduardo
Mestres i Vila, Ma. Lourdes
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ferroelectricitat
Histèresi
Pel·lícules fines
Piezoelectricitat
Ciència dels materials
Ferroelectricity
Hysteresis
Thin films
Piezoelectricity
Materials science
topic Ferroelectricitat
Histèresi
Pel·lícules fines
Piezoelectricitat
Ciència dels materials
Ferroelectricity
Hysteresis
Thin films
Piezoelectricity
Materials science
description Lead-free (K,Na)NbO3 (KNN) and La doped (K,Na)NbO3 (KNN-La) thin films were grown on SrTiO3 substrates by chemical solution deposition method. The effect of adding different amounts of Na and K excess (0-20 mol%) has been investigated. The results confirm the necessity to add 20 mol% excess amounts of Na and K precursor solutions in order to avoid the formation of the secondary phase, K4Nb6O17, as is confirmed by X-ray diffraction and Raman spectroscopy. Moreover, when adding a 20 mol% of alkaline metal excess the thin films are highly textured with out-of-plane preferential orientation in the [100] direction following the [100] orientation of the substrate. Doping with lanthanum resulted in the decrease in the leakage current density at low electric field, and an increase in the dielectric permittivity across all the temperatures range (80-380 K). Although the (100)-oriented KNN and KNN-La films exhibited rounded hysteresis loops, at low temperature the films showed the typical ferroelectric hysteresis loops.
publishDate 2015
dc.date.none.fl_str_mv 2015
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/127946
url https://hdl.handle.net/2445/127946
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.tsf.2015.01.038
Thin Solid Films, 2015, vol. 577, p. 35-41
https://doi.org/10.1016/j.tsf.2015.01.038
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2015
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2015
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 7 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Química Inorgànica i Orgànica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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