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Synthesis of Ferroelectric Strontium Bismuth Tantalate Films from Metal Alkoxide Precursors

  • Wei-Wei Zhuang (a1), Lumei Liu (a1), Naijuan Wu (a2), Zhidong Hao (a2), David M. Hoffman (a1), Alex Ignatiev (a2), Allan J. Jacobson (a1) and Scott S. Perry (a1)...

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.

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Synthesis of Ferroelectric Strontium Bismuth Tantalate Films from Metal Alkoxide Precursors

  • Wei-Wei Zhuang (a1), Lumei Liu (a1), Naijuan Wu (a2), Zhidong Hao (a2), David M. Hoffman (a1), Alex Ignatiev (a2), Allan J. Jacobson (a1) and Scott S. Perry (a1)...

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