Phase Transition in (CH3NH3)3Bi2Br9 Single Crystal

Makoto Iwata; Masahito Eguchi; Yoshihiro Ishibashi; Shigeo Sasaki; Hiroyasu Shimizu; Taketoshi Kawai; Shigetaka Shimanuki

doi:10.1143/JPSJ.62.3315

Phase Transition in (CH₃NH₃)₃Bi₂Br₉ Single Crystal

Makoto Iwata, Masahito Eguchi, Yoshihiro Ishibashi, Shigeo Sasaki, Hiroyasu Shimizu, Taketoshi Kawai, Shigetaka Shimanuki

著者情報

キーワード: (CH₃NH₃)₃Bi₂Br₉, ferroelectricity, ferroelasticity, dielectric constant, elastic constant, phase transition, Landau condition, Landau theory

ジャーナル認証あり

1993 年 62 巻 9 号 p. 3315-3326

DOI https://doi.org/10.1143/JPSJ.62.3315

詳細

抄録

The successive phase transitions in (CH₃NH₃)₃Bi₂Br₉ (MABB) single crystal have been investigated by measuring of dielectric and elastic dispersion and Brillouin and Raman scattering. Softening of the elastic constant c₆₆ and critical slowing down of the order parameter, which belongs to the E_g representation, have been found in the phase I. No optical soft mode has been observed. The phase transition from the phase I to the phase II has been discussed by the Landau theory.

責任著者(Corresponding author)

訂正情報

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