• DOI:10.1143/JJAP.47.7586
• Corpus ID: 122860155

Composition Dependence in BiFeO3 Film Capacitor with Suppressed Leakage Current by Nd and Mn Cosubstitution and Their Ferroelectric Properties

@article{Kawae2008CompositionDI,
  title={Composition Dependence in BiFeO3 Film Capacitor with Suppressed Leakage Current by Nd and Mn Cosubstitution and Their Ferroelectric Properties},
  author={Takeshi Kawae and Hisashi Tsuda and Hiroshi Naganuma and Satoru Yamada and Minoru Kumeda and Soichiro Okamura and Akiharu Morimoto},
  journal={Japanese Journal of Applied Physics},
  year={2008},
  volume={47},
  pages={7586}
}

• T. Kawae, H. Tsuda, +4 authors A. Morimoto
• Published 19 September 2008
• Materials Science
• Japanese Journal of Applied Physics

(Nd,Mn)-cosubstituted BiFeO3 (BFO) films with various Nd and Mn compositions were fabricated on a Pt/SrTiO3(100) substrate by pulsed laser deposition. X-ray diffraction patterns and atomic force microscopy images indicated that the suppression of impurity phases and a smooth surface morphology were realized by Nd substitution in the BFO films. Furthermore, by combining with Nd substitution, a small amount of Mn substitution in BFO films is effective for reducing the leakage current density by three orders of magnitude compared with that of a BFO film capacitor. The polarization vs electric field (P–E) curves showed a strong dependence of measurement frequency in the range of 0.1–2 kHz, and well-saturated P–E hysteresis loops were observed at 20 kHz at room temperature. The remanent polarization and coercive field at a maximum electric field of 1.9 MV/cm were approximately 70 µC/cm2 and 0.32 MV/cm, respectively.