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Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition

We report on an environmentally friendly and versatile aqueous chemical solution deposition route to epitaxial K(0.5)Na(0.5)NbO(3) (KNN) thin films. The route is based on the spin coating of an aqueous solution of soluble precursors on SrTiO(3) single crystal substrates followed by pyrolysis at 400°...

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Autores principales: Pham, Ky-Nam, Gaukås, Nikolai Helth, Morozov, Maxim, Tybell, Thomas, Vullum, Per Erik, Grande, Tor, Einarsrud, Mari-Ann
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6366202/
https://www.ncbi.nlm.nih.gov/pubmed/30800353
http://dx.doi.org/10.1098/rsos.180989
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author Pham, Ky-Nam
Gaukås, Nikolai Helth
Morozov, Maxim
Tybell, Thomas
Vullum, Per Erik
Grande, Tor
Einarsrud, Mari-Ann
author_facet Pham, Ky-Nam
Gaukås, Nikolai Helth
Morozov, Maxim
Tybell, Thomas
Vullum, Per Erik
Grande, Tor
Einarsrud, Mari-Ann
author_sort Pham, Ky-Nam
collection PubMed
description We report on an environmentally friendly and versatile aqueous chemical solution deposition route to epitaxial K(0.5)Na(0.5)NbO(3) (KNN) thin films. The route is based on the spin coating of an aqueous solution of soluble precursors on SrTiO(3) single crystal substrates followed by pyrolysis at 400°C and annealing at 800°C using rapid thermal processing. Strongly textured films with homogeneous thickness were obtained on three different crystallographic orientations of SrTiO(3). Epitaxial films were obtained on (111) SrTiO(3) substrates, while films consisting of an epitaxial layer close to the substrate followed by an oriented polycrystalline layer were obtained on (100) and (110) SrTiO(3) substrates. A K(2)Nb(4)O(11) secondary phase was observed on the surface of the thin films due to the evaporation of alkali species, while the use of an NaCl/KCl flux reduced the amount of the secondary phase. Ferroelectric behaviour of the films was investigated by PFM, and almost no dependence on the film crystallographic orientation was observed. The permittivity and loss tangent of the films with the NaCl/KCl flux were 870 and 0.04 (100-orientation) and 2250 and 0.025 (110-orientation), respectively, at 1 kHz.
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spelling pubmed-63662022019-02-22 Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition Pham, Ky-Nam Gaukås, Nikolai Helth Morozov, Maxim Tybell, Thomas Vullum, Per Erik Grande, Tor Einarsrud, Mari-Ann R Soc Open Sci Chemistry We report on an environmentally friendly and versatile aqueous chemical solution deposition route to epitaxial K(0.5)Na(0.5)NbO(3) (KNN) thin films. The route is based on the spin coating of an aqueous solution of soluble precursors on SrTiO(3) single crystal substrates followed by pyrolysis at 400°C and annealing at 800°C using rapid thermal processing. Strongly textured films with homogeneous thickness were obtained on three different crystallographic orientations of SrTiO(3). Epitaxial films were obtained on (111) SrTiO(3) substrates, while films consisting of an epitaxial layer close to the substrate followed by an oriented polycrystalline layer were obtained on (100) and (110) SrTiO(3) substrates. A K(2)Nb(4)O(11) secondary phase was observed on the surface of the thin films due to the evaporation of alkali species, while the use of an NaCl/KCl flux reduced the amount of the secondary phase. Ferroelectric behaviour of the films was investigated by PFM, and almost no dependence on the film crystallographic orientation was observed. The permittivity and loss tangent of the films with the NaCl/KCl flux were 870 and 0.04 (100-orientation) and 2250 and 0.025 (110-orientation), respectively, at 1 kHz. The Royal Society 2019-01-02 /pmc/articles/PMC6366202/ /pubmed/30800353 http://dx.doi.org/10.1098/rsos.180989 Text en © 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Pham, Ky-Nam
Gaukås, Nikolai Helth
Morozov, Maxim
Tybell, Thomas
Vullum, Per Erik
Grande, Tor
Einarsrud, Mari-Ann
Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition
title Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition
title_full Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition
title_fullStr Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition
title_full_unstemmed Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition
title_short Epitaxial K(0.5)Na(0.5)NbO(3) thin films by aqueous chemical solution deposition
title_sort epitaxial k(0.5)na(0.5)nbo(3) thin films by aqueous chemical solution deposition
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6366202/
https://www.ncbi.nlm.nih.gov/pubmed/30800353
http://dx.doi.org/10.1098/rsos.180989
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