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Nanoscale structural analysis of Pb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$

Pb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$のナノスケール構造解析

米田 安宏   ; 谷口 博基*; 野口 祐二*

Yoneda, Yasuhiro; Taniguchi, Hiroki*; Noguchi, Yuji*

放射光高エネルギーX線回折実験を用いて、リラクサーPb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$ (PMN)のナノスケール構造解析を行った。PMNはよく知られたリラクサー強誘電体であるが、平均構造が立方晶構造であることから、強誘電性のミクロ構造を説明するために種々のモデルが提案されてきた。我々は2体相関分布関数法(pair distribution function, PDF)を使って20nmまでの広いレンジの局所構造解析を行った。

Nanoscale structural analysis of relaxor Pb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$ (PMN) was performed using synchrotron high-energy X-ray diffraction measurements. Although PMN is a well-known relaxor ferroelectric material, the average structure is a cubic structure, and various models have been proposed to explain the ferroelectric microstructure. We performed a wide-range local structure analysis up to 20 nm using the pair distribution function (PDF). As a result, it was found that the structure of PMN changed depending on the distance and it was a glass-like structure.

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パーセンタイル:26.67

分野:Physics, Condensed Matter

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