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An alternative chemical route for synthesis of SrBi2Ta2O9 thin films

Published online by Cambridge University Press:  31 January 2011

S. M. Zanetti
Affiliation:
Departamento de Química—Universidade Federal de São Carlos, P.O. Box 676, 13560–905 São Carlos, SP, Brazil
E. R. Leite
Affiliation:
Departamento de Química—Universidade Federal de São Carlos, P.O. Box 676, 13560–905 São Carlos, SP, Brazil
E. Longo
Affiliation:
Departamento de Química—Universidade Federal de São Carlos, P.O. Box 676, 13560–905 São Carlos, SP, Brazil
E. B. Araújo
Affiliation:
Departamento de Física—Universidade Federal de São Carlos, P.O. Box 676, 13560–905 São Carlos, SP, Brazil
A. J. Chiquito
Affiliation:
Departamento de Física—Universidade Federal de São Carlos, P.O. Box 676, 13560–905 São Carlos, SP, Brazil
J. A. Eiras
Affiliation:
Departamento de Física—Universidade Federal de São Carlos, P.O. Box 676, 13560–905 São Carlos, SP, Brazil
J. A. Varela
Affiliation:
Instituto de Química—Universidade Estadual de São Paulo, P.O. Box 355, 14801–970 Araraquara, SP, Brazil
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Abstract

SrBi2Ta2O9 was synthesized by the modified polymeric precursor method using precursor reagents such as carbonate, nitrate, or oxide. The films were deposited onto Pt/Ti/SiO2/Si(100) substrates by spin coating and crystallized at temperatures ranging from 700 to 800 °C in air. Microstructural and phase evaluation were followed by grazing incidence x-ray diffraction, scanning electron microscopy, and atomic force microscopy. The films displayed rounded grain structures with a superficial roughness of approximately 10 nm. The dielectric constant values were 362 and 617 for films treated at 700 and 800 °C, respectively. The remanent polarization and coercive field were 12.3 μC/cm2 and 61 kV/cm and 18.48 μC/cm2 and 47 kV/cm for the film treated at 700 and 800 °C, respectively. This method generally allows for the use of readily available reagents such as oxides, carbonates, or nitrate as cation sources, with the added advantage that it requires no special apparatus or atmosphere control.

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Articles
Copyright
Copyright © Materials Research Society 2000

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An alternative chemical route for synthesis of SrBi2Ta2O9 thin films
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