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Role of Pb excess in the crystallization of lead zirconate titanate films derived via sol-gel processing

Published online by Cambridge University Press:  31 January 2011

L. Salamanca-Riba
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, Maryland 20742
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Abstract

Sol-gel spin coating of lead-titanate films differs from most processing routes, such as metalorganic chemical vapor deposition and pulsed laser deposition, in that crystallization cannot occur without a postdeposition annealing step. This work focuses on the annealing of sol-gel-derived PbZrTiO3 films on LaAlO3 substrates in attempts to identify the precise conditions necessary to grow films of quality similar to that obtained through other techniques. In particular, the effects of Pb excess (in precursor solutions), annealing times, and temperature were investigated through transmission electron microscopy and four-circle x-ray diffraction. The significance of this work is in the direct observation of the correlation between Pb excess and film crystallization. It is shown that the effects of Pb excess on the completeness of film crystallization become more dramatic at lower annealing temperatures, even while epitaxial quality is maintained.

Type
Articles
Copyright
Copyright © Materials Research Society 2003

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