Ferroelectric property of a-/b-axis-oriented epitaxial Sr0.8Bi2.2Ta2O9 thin films grown by metalorganic chemical vapor deposition

Takayuki Watanabe, Tomohiro Sakai, Hiroshi Funakubo, Keisuke Saito, Minoru Osada, Mamoru Yoshimoto, Atsushi Sasaki, Jin Liu, Masato Kakihana

研究成果: Article

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In this study, a-/b-axis-oriented epitaxial Sr0.8Bi2.2Ta2O9 (SBT) thin films were grown on (101)TiO2 and (101)RuO2//(110)Al2O3 substrates by metalorganic chemical vapor deposition (MOCVD). By several X-ray diffraction techniques, the a-/b-axis-oriented epitaxial growth on the substrate with a rutile structure was confirmed. The leakage current density of SBT was characterized along the a-/b-axis and c-axis, and the lower defect density in the pseudoperovskite layer was revealed by comparison with Bi4Ti3O12. The saturation polarization (Ps), remanent polarization (Pr), and coercive field (Ec) were 6.0μC/cm2, 3.1μC/cm2 and 54 kV/cm, respectively. The estimated spontaneous polarization along the a-axis corrected by the a-/b-domain volume ratio was 20μC/cm2, which is identical to previously estimated values. The switching charge versus the repetitive 1.2×1010 switching cycles remained almost constant, indicating a superior fatigue endurance along the direction parallel to the (Bi2O2)2+ layer.

元の言語English
ページ(範囲)L1478-L1481
ジャーナルJapanese Journal of Applied Physics
41
発行部数12B
DOI
出版物ステータスPublished - 2002 12 1
外部発表Yes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

フィンガープリント Ferroelectric property of a-/b-axis-oriented epitaxial Sr<sub>0.8</sub>Bi<sub>2.2</sub>Ta<sub>2</sub>O<sub>9</sub> thin films grown by metalorganic chemical vapor deposition' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Watanabe, T., Sakai, T., Funakubo, H., Saito, K., Osada, M., Yoshimoto, M., Sasaki, A., Liu, J., & Kakihana, M. (2002). Ferroelectric property of a-/b-axis-oriented epitaxial Sr0.8Bi2.2Ta2O9 thin films grown by metalorganic chemical vapor deposition. Japanese Journal of Applied Physics, 41(12B), L1478-L1481. https://doi.org/10.1143/JJAP.41.L1478