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

Masatomo Yashima; Rong Tu; Takashi Goto; Hisanori Yamane

doi:10.14853/pcersj.2005F.0.165.0

18th Fall Meeting of The Ceramic Society of Japan & 1st Asia-Oceania Ceramic Federation (AOCF) Conference

Session ID : 1K22

DOI https://doi.org/10.14853/pcersj.2005F.0.165.0

Conference information

Host: The Ceramic Society of Japan

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

*Masatomo Yashima, Rong Tu, Takashi Goto, Hisanori Yamane

Author information

Keywords: Rietveld analysis, neutron diffraction, barium titanate, phase transition, ferroelectricity

CONFERENCE PROCEEDINGS FREE ACCESS

Details

Abstract

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

Corresponding author

Register with J-STAGE for free!