Structural transformations in cubic Dy2O3 at high pressures

	Structural transformations in cubic Dy2O3 at high pressures
	Jiang, S; 刘景;林传龙;; Liu, J; Lin, CL; Bai, LG; Zhang, YF; Li, XD; Li, YC; Tang, LY; Wang, H
刊名	SOLID STATE COMMUNICATIONS
	2013
卷号	169 页码:37-41
关键词	Rare-earth sesquioxides Phase transition High pressure Synchrotron radiation
英文摘要	The structural stability of cubic Dy2O3 under high pressure has been investigated using synchrotron radiation in a diamond anvil cell up to 49.0 GPa. The diffraction data reveals the cubic phase undergoes two successive phase transitions on compression. The phase transition from a cubic to a monoclinic structure starts at 7.7 GPa and is complete at 18.8 GPa with a similar to 7.9% volume collapse. The monoclinic phase further transforms to a hexagonal phase starting at similar to 10.9 GPa and the hexagonal phase becomes dominant at 26.6 GPa. This high-pressure hexagonal phase with a small amount of retained monoclinic phase is stable up to the highest pressure of 49.0 GPa in this study. After pressure release, Dy2O3 is a monoclinic structure. A third-order Birch-Murnaghan fit yields zero pressure bulk moduli (B-0) of 191(4), 179(9) and 231(22) GPa and their pressure derivatives (B'(0)) of 2.8(7), 42(6), 3.5(6) for the cubic, monoclinic and hexagonal phases, respectively. Comparing with other rare-earth sesquioxides, we confirm that the transition pressure from cubic to monoclinic phase, as well as the bulk modulus of the cubic phase, increases with the decreasing of the cation radius of rare-earth sesquioxides. (C) 2013 Elsevier Ltd. All rights reserved.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000324452400009
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/223780]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Jiang, S,刘景；林传龙；,Liu, J,et al. Structural transformations in cubic Dy2O3 at high pressures[J]. SOLID STATE COMMUNICATIONS,2013,169:37-41.
APA	Jiang, S.,刘景；林传龙；.,Liu, J.,Lin, CL.,Bai, LG.,...&白利刚；张玉峰；李晓东；李延春；唐玲云；.(2013).Structural transformations in cubic Dy2O3 at high pressures.SOLID STATE COMMUNICATIONS,169,37-41.
MLA	Jiang, S,et al."Structural transformations in cubic Dy2O3 at high pressures".SOLID STATE COMMUNICATIONS 169(2013):37-41.