Structural fluctuation of Pb(Mg1/3Nb2/3)O3 in the cubic phase

被引：6
|
作者：
Noda, Shota [1 ]
Yokoi, Yuto [1 ]
Nakahira, Yuki [1 ]
Abe, Tomohiro [1 ]
Fujii, Ichiro [2 ]
Wada, Takahiro [3 ]
Moriyoshi, Chikako [1 ]
Kuroiwa, Yoshihiro [1 ]
机构：
[1] Hiroshima Univ, Dept Phys Sci, Higashihiroshima, Hiroshima 7398526, Japan
[2] Univ Yamanashi, Grad Fac Interdisciplinary Res, Kofu, Yamanashi 4008510, Japan
[3] Ryukoku Univ, Dept Mat Chem, Otsu, Shiga 5202194, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2019年 / 58卷 / SL期
关键词：
EFFECTIVE IONIC-RADII; RELAXOR FERROELECTRICS; POWDER DIFFRACTION; CHARGE-DENSITY; PB ATOM; DISORDER; PBMG1/3NB2/3O3; TRANSITION;
D O I：
10.7567/1347-4065/ab389e
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
To investigate the structural fluctuations of relaxor Pb(Mg1/3Nb2/3)O-3 (PMN) in the cubic phase, the probability density function of each atom was determined by high-energy synchrotron radiation X-ray powder diffraction measurements and a Rietveld analysis with anharmonic temperature factors. A rotator-like behavior of the Pb ion was observed in the cubic phase. The off-center behavior along the < 1 1 1 > directions became pronounced with decreasing temperature. The ferroelectricity of PMN was attributed to a combination of the freezing of the < 1 1 1 >-preferred rotator-like disorder and the ferroelectric distortion of the B-O-6 octahedron. (C) 2019 The Japan Society of Applied Physics
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页数：5
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