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Local structure analysis of (Na$$_{0.5}$$K$$_{0.45}$$Li$$_{0.05}$$)NbO$$_3$$ synthesized by malic acid complex solution method

錯体重合法で作製した(Na$$_{0.5}$$K$$_{0.45}$$Li$$_{0.05}$$)NbO$$_3$$の局所構造解析

米田 安宏; 高田 愛梨*; 長井 遥*; 菊池 丈幸*; 森下 正夫*; 小舟 正文*

Yoneda, Yasuhiro; Takada, Eri*; Nagai, Haruka*; Kikuchi, Takeyuki*; Morishita, Masao*; Kobune, Masafumi*

錯体重合法を用いて作製した(Na$$_{0.5}$$K$$_{0.45}$$Li$$_{0.05}$$)NbO$$_3$$の単射晶相を放射光を用いて構造解析した。(Na$$_{0.5}$$K$$_{0.45}$$Li$$_{0.05}$$)NbO$$_3$$の平均構造は単射晶構造であるが、局所構造はKNbO$$_3$$と同じ菱面体晶構造モデルで再現することができた。この結果から平均構造の単射晶構造は菱面体晶がdisorderして変調されて観測されたと考えられる。

A monoclinic phase was discovered in (Na$$_{0.5}$$K$$_{0.45}$$Li$$_{0.05}$$)NbO$$_3$$ solid solution ceramics grown by a malic acid complex solution method. The average and local structures of this monoclinic phase were analyzed by synchrotron X-ray measurements. The local structure can be reproduced by assuming a rhombohedral model, that is the same local structure of KNbO$$_3$$. The results demonstrate that the monoclinic average structure is observed as a disordered rhombohedral structure.

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パーセンタイル:82.22

分野:Physics, Applied

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