Preparation of highly c-axis-oriented Bi4Ti3O12 thin films and their crystallographic, dielectric and optical properties

Masaki Yamaguchi, Takao Nagamoto, Osamu Omoto

研究成果: Article査読

63 被引用数 (Scopus)


Bismuth titanate (Bi4Ti3O12) thin films with a high c-axis orientation up to 99% were prepared on (100)-oriented silicon wafers by r.f. planar magnetron sputtering using a Bi2TiO5 ceramic target at a substrate temperature of 600°C. From the Auger electron spectroscopy depth profile of the film, there is no evidence of interdiffusion of a specific element between the film and the substrate. Relative dielectric constant of these films depends on film thickness. The behavior was explained assuming a low-dielectric-constant interface layer. Using this assumption, the relative dielectric constant of Bi4Ti3O12 film was estimated to be approximately 140. This value is close to that along the c axis in a bulk form. The remanent polarization and the coercive field were 0.8 μC cm-2 and 20 kV cm-1, respectively.

ジャーナルThin Solid Films
出版ステータスPublished - 1997 5 28

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 表面および界面
  • 表面、皮膜および薄膜
  • 金属および合金
  • 材料化学


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