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Epitaxial growth and control of the sodium content in NaxCoO2 thin films

Hildebrandt, Sandra and Komissinskiy, Philipp and Major, Marton and Donner, Wolfgang and Alff, Lambert (2013):
Epitaxial growth and control of the sodium content in NaxCoO2 thin films.
In: Thin Solid Films, Elsevier Science Publishing, pp. 291-295, 545, ISSN 00406090,
[Online-Edition: http://dx.doi.org/10.1016/j.tsf.2013.08.072],
[Article]

Abstract

Single-phase c-axis oriented NaxCoO2 thin films were grown on (001) SrTiO3 single-crystal substrates, using pulsed laser deposition. X-ray diffraction analysis indicates the epitaxial growth of NaxCoO2 thin films in two domains, rotated in-plane by 15 and 45 degrees relative to [100] SrTiO3. The sodium stoichiometry x of the films can be controlled in a range of 0.38 < x < 0.84 by in-situ post-deposition annealing the NaxCoO2 films at 720 – 760 °C in oxygen for 10 – 30 min. γ - NaxCoO2 films are obtained with a full width at half maximum of the (002) NaxCoO2 rocking curve below 0.2 degrees. The post-deposition annealing can substitute commonly used chemical deintercalation of Na which is typically associated with a loss in crystallinity.

Item Type: Article
Erschienen: 2013
Creators: Hildebrandt, Sandra and Komissinskiy, Philipp and Major, Marton and Donner, Wolfgang and Alff, Lambert
Title: Epitaxial growth and control of the sodium content in NaxCoO2 thin films
Language: English
Abstract:

Single-phase c-axis oriented NaxCoO2 thin films were grown on (001) SrTiO3 single-crystal substrates, using pulsed laser deposition. X-ray diffraction analysis indicates the epitaxial growth of NaxCoO2 thin films in two domains, rotated in-plane by 15 and 45 degrees relative to [100] SrTiO3. The sodium stoichiometry x of the films can be controlled in a range of 0.38 < x < 0.84 by in-situ post-deposition annealing the NaxCoO2 films at 720 – 760 °C in oxygen for 10 – 30 min. γ - NaxCoO2 films are obtained with a full width at half maximum of the (002) NaxCoO2 rocking curve below 0.2 degrees. The post-deposition annealing can substitute commonly used chemical deintercalation of Na which is typically associated with a loss in crystallinity.

Journal or Publication Title: Thin Solid Films
Volume: 545
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: NaxCoO2 thin films, Epitaxial relation on (001) SrTiO3, Control of sodium content, Pulsed laser deposition
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Structure Research
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 09 Jan 2014 09:09
Official URL: http://dx.doi.org/10.1016/j.tsf.2013.08.072
Identification Number: doi:10.1016/j.tsf.2013.08.072
Funders: This study was supported by the AL560/6-1 project of the Deutsche Forschungsgemeinschaft.
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