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BiScO3:  Centrosymmetric BiMnO3-type Oxide

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journal contribution
posted on 25.01.2006, 00:00 by Alexei A. Belik, Satoshi Iikubo, Katsuaki Kodama, Naoki Igawa, Shin-ichi Shamoto, Makoto Maie, Takuro Nagai, Yoshio Matsui, Sergey Yu. Stefanovich, Bogdan I. Lazoryak, Eiji Takayama-Muromachi
With neutron powder diffraction, electron diffraction, and second-harmonic generation, we have shown that BiScO3 has a structure closely related to that of multiferroic BiMnO3, but BiScO3 crystallizes in the centrosymmetric space group of C2/c. These results bring up a question about the origin of ferroelectricity in BiMnO3. BiScO3 may serve as a model system to understand the role of Mn3+ ions in the ferroelectricity of BiMnO3.