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Phase evolution in solution deposited Pb-deficient PLZT thin films

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Abstract

Initial crystallization of Pb-deficient, lanthanum modified lead zirconate titanate (PLZT) layers followed by post-crystallization phase conversion can be used to obtain high quality PLZT thin films. However, phase evolution in Pb-deficient PLZT thin films is not well understood. To characterize phase evolution in these films, we developed a new in situ, high-temperature X-ray diffraction (XRD) measurement approach for slow heating rates. The well-characterized Pb-excess PLZT composition was used for comparison and to validate the new XRD setup described herein. During crystallization of Pb-deficient thin films, a Pb-rich/La-poor perovskite phase and Pb-poor/La-rich fluorite phase were observed to form simultaneously. The fluorite phase was observed to partially transform into a secondary perovskite phase at higher temperatures. The results obtained are discussed in view of the current understanding of phase evolution in these materials. The details of the new in situ XRD technique are also presented.

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Acknowledgements

This work was supported by the National Institute for NanoEngineering (NINE) and the Laboratory Directed Research and Development program at Sandia National Laboratories. Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Company, for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000. JLJ acknowledges NSF for funding through award number DMR-0746902. The authors would also like to thank Dr. Valentin Craciun and MAIC at University of Florida for access to the Philips X’Pert XRD and Pat Mahoney at Sandia National Laboratories for help in preparation of samples.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL, 32611, USA

    Krishna Nittala & Jacob L. Jones

  2. Materials Science and Engineering Center, Sandia National Laboratories, Albuquerque, NM, USA

    Geoff L. Brennecka & Bruce A. Tuttle

Authors
  1. Krishna Nittala
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  2. Geoff L. Brennecka
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  3. Bruce A. Tuttle
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  4. Jacob L. Jones
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Correspondence to Jacob L. Jones.

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Nittala, K., Brennecka, G.L., Tuttle, B.A. et al. Phase evolution in solution deposited Pb-deficient PLZT thin films. J Mater Sci 46, 2148–2154 (2011). https://doi.org/10.1007/s10853-010-5051-x

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  • DOI: https://doi.org/10.1007/s10853-010-5051-x

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