Growth of Epitaxial SrBi2Ta2O9 Thin Films by Metalorganic Chemical Vapor Deposition

Abstract
Epitaxially grown SrBi2Ta2O9(SBT) thin films were deposited on various types of substrates at temperatures ranging from 620 to 910°C by metalorganic chemical vapor deposition. Epitaxial SBT films with (001) orientation were easily grown on perovskite- and rocksalt-structured substrates. The films tended to grow at lower deposition temperatures on the substrates, which had a lower mismatch with the film. When the film was deposited on a fluorite-structured substrate, yttria-stabilized zirconia (YSZ), it had a fluorite phase at a wide deposition temperature range. Epitaxially grown SBT film with (116) orientation was prepared on (110) SrTiO3 substrate at 820°C. This film exhibited twinning.