Crystal structure of the high-temperature paraelectric phase in barium titanate BaTi2O5

作者: Masatomo Yashima , Rong Tu , Takashi Goto , Hisanori Yamane , None

DOI: 10.1063/1.2042636

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摘要: Crystal structure of a ferroelectric barium titanate BaTi2O5 was investigated by the Rietveld analysis neutron powder diffraction data measured at 706°C. The crystal 706°C refined assuming centrosymmetric monoclinic A2∕m space group. structures high-temperature and low-temperature A2 phases are similar. displacement atoms along b axis is accompanied paraelectric to phase transformation. A2∕m‐A2 transition not reconstructive but displacive.

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