Local structure analysis of Bi $_{0.5}$ Na $_{0.5}$ TiO

Yoneda, Yasuhiro ; Nagamoto, Takeru*; Nagata, Hajime*; Kobune, Masafumi*

Bi $_{0.5}$ Na $_{0.5}$ TiO (BNT) is a candidate for lead-free piezoelectric material having a perovskite-type structure. The crystal structure of BNT was believed to be rhombohedral. Recently, BNT grown by high-temperature synthesis was reported to be monoclinic. We have synthesized Bi $_ {0.5}$ Na $_ {0.5}$ TiO crystal in the high temperature condition so as to apply the Rietveld method for average structure refinement and the atomic pair-distribution function (PDF) technique for local structure refinement. The Bragg peaks can be reproduced by assuming a monoclinic structure, while the local structure can be reproduced by assuming a rhombohedral crystal structure.

Language	:	Japanese
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Meeting title	:	日本物理学会第70回年次大会
Held date	:	2015/03
Location (city)	:	東京
Location (country)	:	日本
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Keywords	:	no keyword
Research Facility	:	SPring-8(大型放射光施設)
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Registration No. : BB20143281
JAEA Abstracts No. :
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Local structure analysis of BiNaTiO

Local structure analysis of Bi $_{0.5}$ Na $_{0.5}$ TiO