High-pressure phase above 40 GPa in ferroelectric KNbO3

被引：25
|
作者：
Kobayashi, Y [1 ]
Endo, S
Ashida, T
Ming, LC
Kikegawa, T
机构：
[1] Osaka Univ, Res Ctr Mat Sci Extreme Condit, Toyonaka, Osaka 5608531, Japan
[2] Kinki Univ, Dept Chem & Environm Technol, Higashihiroshima, Hiroshima 7292115, Japan
[3] Univ Hawaii Manoa, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA
[4] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
来源：
PHYSICAL REVIEW B | 2000年 / 61卷 / 09期
关键词：
D O I：
10.1103/PhysRevB.61.5819
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A ferroelectric KNbO3 of the barium titanate family has been investigated to 69 GPa at room temperature by angle-dispersive powder diffraction using synchrotron radiation and an imaging plate. A phase transition was observed to take place at around 40 GPa, and the Rietveld analysis showed that the high-pressure phase has GdFeO3-type orthorhombic structure, which is also one of the distorted perovskite structures.
引用
收藏
页码：5819 / 5822
页数：4
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