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Oriented films of LaNiO3 and other members of the Lan+1NinO3n+1 series, LaCuO3−δ and Pb(Zr0.52Ti0.48)O3, obtained by nebulized spray pyrolysis

Raju, AR and Aiyer, HN and Rao, CNR (1995) Oriented films of LaNiO3 and other members of the Lan+1NinO3n+1 series, LaCuO3−δ and Pb(Zr0.52Ti0.48)O3, obtained by nebulized spray pyrolysis. In: Chemistry of Materials, 7 (1). pp. 225-231.

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The technique of nebulized spray pyrolysis has been explored to find out whether oriented films of certain important oxides can be produced on single-crystal substrates by this relatively gentle method. Starting with acetylacetonate precursors, oriented films of metallic LaNiO3 containing nearly spherical grains (30 nm) have been obtained. Films of near-stoichiometric La4Ni3O10 and La3Ni2O7 showing metallic conductivity have been obtained by this method. This is indeed gratifying since it is difficult to prepare monophasic and stoichiometric bulk samples of these materials. Films of La2NiO4 show the expected semiconducting behavior. In the La-Cu-O system, starting with acetylacetonates, we have obtained films mainly comprising semiconducting La2Cu2O5, which is generally difficult to prepare in bulk form. More interestingly, nebulized spray pyrolysis gives excellent stoichiometric films of Pb(Zr0.52Ti0.48)O-3 consisting of nearly spherical grains (30 nm) which show ferroelectric behavior. The present investigation demonstrates that nebulized spray pyrolysis provides a useful and desirable route to deposite oriented films of complex oxide materials on single-crystal substrates.

Item Type: Journal Article
Publication: Chemistry of Materials
Publisher: American Chemical Society
Additional Information: Copyright of this article belongs to American Chemical Society.
Keywords: Experimental study;Crystal growth from solutions;Crystal growth methods;Nebulization;Pyrolysis;Spray coating;Thin films;Preferred orientation;Crystal orientation;Ternary compounds;Lanthanum oxides;Nickel oxides;Copper oxides;Lead zirconates;Lead titanates;Quaternary compounds; Microstructure;Characterization;Nebulized spray pyrolysis; Inorganic compounds;Transition element compounds;Rare earth compounds
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 24 May 2011 04:58
Last Modified: 24 May 2011 04:58
URI: http://eprints.iisc.ac.in/id/eprint/37836

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