Presentation Information

[20a-A309-8]Heat treatment effect of (Bi, K)TiO3 based thin film prepared by hydrothermal method

〇Taichi Murashita1, Yuma Takahashi1, Rurika Kubota1, Yoshiharu Ito2, Yasuhiro Fujii3, Akitoshi Koreeda3, Kazuki Okamoto1, Hiroshi Funakubo1 (1.Tokyo Tech., 2.Nihon Univ, 3.Ritsumeikan Univ.)

Keywords:

Ferroelectric material,Hydrothermal method,(Bi,K)TiO3

Our group successfully prepared high-quality (Bi, K)TiO3 thin films with polar oriented axis by hydrothermal method in 2022. The tetragonality (c/a) of the obtained films was much larger than previously reported values. DFT calculations by Jiang et al. showed that the tetragonality of (Bi, K)TiO3 increases when Bi and K are ordered in a specific orientation. In this study, we report on our investigation of the effect of heat treatment on (Bi, K)TiO3 prepared by hydrothermal method.