title: A ferroelectric barium titanate, BaTi2O5.
abstract: The crystal structure of monobarium dititanium pentaoxide, BaTi(2)O(5), synthesized by a floating-zone method, was studied by X-ray diffraction. Previous reports describe the structure as being in the monoclinic centrosymmetric space group C2/m. We have recently found that this material exhibits ferroelectricity, and therefore BaTi(2)O(5) should have lower symmetry. The crystal structure of BaTi(2)O(5) was refined in space group C2, revealing a displacement of the Ti atoms along the b axis. This result is consistent with the fact that the ferroelectricity of BaTi(2)O(5) was only observed along the b axis.
authors.affiliation: Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan. tei@imr.edu
authors.forename: Teiichi
authors.initials: T
authors.lastname: Kimura
authors.forename: Takashi
authors.initials: T
authors.lastname: Goto
authors.forename: Hisanori
authors.initials: H
authors.lastname: Yamane
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Iwata
authors.forename: Takashi
authors.initials: T
authors.lastname: Kajiwara
authors.forename: Takaya
authors.initials: T
authors.lastname: Akashi