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Phase and Microstructural Development of Sol-gel-derived Strontium Barium Niobate Thin Films

Published online by Cambridge University Press:  31 January 2011

A. Y. Oral  and
M. L. Mecartney
A. Y. Oral
Affiliation:
Department of Chemical and Biochemical Engineering and Materials Science, University of California—Irvine, Irvine, California 92697-2575
M. L. Mecartney
Affiliation:
Department of Chemical and Biochemical Engineering and Materials Science, University of California—Irvine, Irvine, California 92697-2575
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Abstract

Microstructural changes in sol-gel-derived SrxBa1−xNb2O6 (SBN) thin films were monitored as a function of Ba-to-Sr ratio (from x = 0 to x = 1), choice of substrate (Si or MgO), and processing variations. Sols were created using Ba, Sr, and Nb alkoxides dissolved in acetic acid. The relatively high decomposition temperature for the organics led to a tendency to form defects, but careful control of thermal process parameters could be used to produce a uniform film microstructure. An unexpected phase, interpreted as a hexagonal (pseudo-orthorhombic) variant of hexagonal BaNb2O6, was encountered in Ba-rich sol-gel-derived SBN powders and thin films annealed at 750 °C. Increased (001) orientation was observed for SBN thin films deposited on (100) MgO when fast thermal processing was used.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 6 , June 2000 , pp. 1417 - 1423
Copyright
Copyright © Materials Research Society 2000

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References

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