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論文

Acute and obtuse rhombohedrons in the local structures of relaxor ferroelectric Pb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$

Hu, W.*; 林 好一*; 大和田 謙二; Chen, J.*; 八方 直久*; 細川 伸也*; 高橋 正光; Bokov, A.*; Ye, Z.-G*

Physical Review B, 89(14), p.140103_1 - 140103_5, 2014/04

 被引用回数:33 パーセンタイル:14.55(Materials Science, Multidisciplinary)

The local structures around Nb and Pb in the relaxor ferroelectric Pb(Mg$$_{1/3}$$Nb$$_{2/3}$$)O$$_3$$ were investigated by X-ray fluorescence holography. The Pb atomic images around Nb showed a rhombohedral distortion of the crystal unit cells. The Pb-Pb correlated images showed a local structure of body-center-like $$2a_0times 2a_0 times 2a_0$$ superlattice, proving a rigid three-dimensional network structural model combining the two kinds of rhombohedrons. This superstructure and the fluctuating Pb and Nb atoms play an important role in the relaxor behavior of this material.

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