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Synthesis of Ferroelectric Strontium Bismuth Tantalate Films from Metal Alkoxide Precursors

Published online by Cambridge University Press:  15 February 2011

Wei-Wei Zhuang ,
Lumei Liu ,
Naijuan Wu ,
Zhidong Hao ,
David M. Hoffman ,
Alex Ignatiev ,
Allan J. Jacobson  and
Scott S. Perry
Wei-Wei Zhuang
Affiliation:
Department of Chemistry, University of Houston, Houston, TX 77204
Lumei Liu
Affiliation:
Department of Chemistry, University of Houston, Houston, TX 77204
Naijuan Wu
Affiliation:
Texas Center for Superconductivity and Space Vacuum Epitaxy Center, University of Houston, Houston, TX 77204
Zhidong Hao
Affiliation:
Texas Center for Superconductivity and Space Vacuum Epitaxy Center, University of Houston, Houston, TX 77204
David M. Hoffman
Affiliation:
Department of Chemistry, University of Houston, Houston, TX 77204
Alex Ignatiev
Affiliation:
Texas Center for Superconductivity and Space Vacuum Epitaxy Center, University of Houston, Houston, TX 77204
Allan J. Jacobson
Affiliation:
Department of Chemistry, University of Houston, Houston, TX 77204
Scott S. Perry
Affiliation:
Department of Chemistry, University of Houston, Houston, TX 77204
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Abstract

Ferroelectric SrBi2Ta2O9 (SBT) films were prepared by the spin coating technique on platinum, quartz and YBa2Cu3O7-x/LaA1O3 substrates from a methoxyethanol solution of bismuth isopropoxide (Bi(OCH(CH3)2)3) and strontium tantalum isopropoxide (SrTa2(OCH(CH3)2)12). X-Ray diffraction studies showed some crystallization occurred after annealing the films under oxygen flow at 600 °C and excellent crystallinity was achieved after annealing at 750 °C for 0.5 h. Electron microprobe analysis gave a composition close to that expected for SBT, and atomic force microscopy gave a root mean square surface roughness of 101 A. An hysteresis measurement (1 kHz) gave remnant polarization (2Pr), saturation polarization (Ps) and coercive field (Ec) values of 14.5 μC/cm2, 14.5 μ/cm2 and 59 kV/cm, respectively.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 513
Copyright
Copyright © Materials Research Society 1997

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References

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