Structural evolution of PZTN thin films produced by pulsed laser ablation deposition |
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Authors: | M Pereira MJM Gomes |
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Affiliation: | Department of Physics, FMNC-CFUM, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal |
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Abstract: | The study of highly oriented Nb-doped PZT thin films deposited by laser ablation on n-type (111) Si substrates is reported. Sintered ceramics based on the nominal composition Pb0.995(Zr0.65Ti0.35)0.99Nb0.01O3 (PZTN) with an excess of PbO were used as targets. The films were deposited using the 3rd harmonic (355 nm) of a pulsed Nd:YAG laser (7 ns pulse duration) with 7 J/cm2 fluence, at different oxygen pressures (from 10−1 to 10−4 mbar) and at a vacuum of 10−6 mbar. The substrate temperature was varied in the range of 500-600 °C. In optimized conditions, the as-deposited PZT-based films show perovskite structure oriented along the (110) direction with minor impurities (PbO), as revealed from X-ray diffraction spectra. Further, microstructural analysis of the as-grown including chemical composition is also presented. The relationship between composition of the target, deposition conditions and film properties are then discussed. |
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Keywords: | Pulsed laser ablation Deposition process X-ray diffraction Crystallization PZTN |
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