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Crystal structure analysis of manganese and gallium doped hexagonal BaTiO3 by synchrotron radiation powder diffraction

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7 Author(s)
Hidesada Natsui ; Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, Japan ; Chikako Moriyoshi ; Fumiko Yoshida ; Yoshihiro Kuroiwa
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Crystal structures of manganese doped and gallium doped metastable hexagonal barium titanate were investigated by high energy synchrotron radiation powder diffraction at BL02B2 in SPring-8. The Rietveld analyses reveal that the lattice of gallium doped sample is expanded along the c-axis, while the lattice is not changed in the manganese doped sample, although the ionic radius of gallium is almost same as that of titanium, and besides, that of manganese is fairly smaller. These results imply that the lattice is essentially expanding by the doping. It is considered that the lattice expanding is significant in the stabilization of the hexagonal phase.

Published in:

2010 IEEE International Symposium on the Applications of Ferroelectrics (ISAF)

Date of Conference:

9-12 Aug. 2010