Epitaxial films of Li1-xNb1-xWxO3 prepared by chemical solution deposition
C.D.E. Lakeman, Y. Xia, J-H. Kim, X. Wu, H.G. Eckert, F.F. Lange
(University of California-Santa Barbara)
The growth of epitaxial thin films of Li1-xNb1-xWxO3 from solution precursors on single crystal LiNbO3 substrates is reported. An all-alkoxide solution readily gave single phase powders after simply mixing the constituent components, whereas an acetate-alkoxide system required additional solution processing stages to give phase pure powders. Heat treatment of films on single crystal, basal plane LiNbO3 substrates at 600¡C formed a nanocrystalline, porous film which was converted to an epitaxial film after heating to 800¡C. Measurements of second harmonic generation in powders indicate an increase in SHG efficiency with increasing tungsten content. Optical absorption data for films were calculated using reflectance and transmittance spectroscopy data, and indicate a decrease in band gap with increasing tungsten.
Keywords: ceramics; optical materials; thin film
Order No.: JA806-022 © 1998 MRS
Go to June 1998 Table of Contents
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