Size-dependent phase transition of Er2O3 under high pressure

doi:10.1063/1.5017815

CAS OpenIR > 中科院上海应用物理研究所2011-2019年

	Size-dependent phase transition of Er2O3 under high pressure
	Ren, XT ; Yan, XZ ; Yu, ZH ; Li, WT ; Yang, K ; Wang, XL ; Liu, YZ ; Wang, L
	2018
Source Publication	APPLIED PHYSICS LETTERS
ISSN	0003-6951
Volume	112 Issue:14 Pages:-
Subtype	期刊论文
Abstract	The size effect on the structural and optical properties of cubic Er2O3 was investigated under pressure by in-situ angular dispersive synchrotron x-ray diffraction (AD-XRD), Raman scattering, photoluminescence (PL), and impedance spectroscopy. Contrary to the phase transition sequence of cubic -> monoclinic -> hexagonal in bulk Er2O3, a transformation from cubic directly to hexagonal was observed in Er2O3 nanoparticals. Compared with bulk Er2O3, nano-Er2O3 showed an obvious elevation of phase transition pressure and larger bulk module. A third- order Birch- Murnaghan fitting yields zero pressure bulk moduli (B-0) of 181(5), and 226(4) GPa and their pressure derivatives (B'(0)) of 4.0(7), 1.9(5) for the cubic and hexagonal phases, respectively. The multiple PL lines of S-4(3/2)-> I-4(15/2) originating from the cubic phase are also altered due to phase transformation. The impedance spectroscopy indicated that the nano-Er2O3 is an insulator up to 30 GPa. These findings give a fresh understanding of size influence on the phase transition sequences and sheds light on the applications of nano-Er2O3. Published by AIP Publishing.
Keyword	Rare-earth Sesquioxides Structural Transformations Ab-initio Nanocrystals Amorphization Stability Shape
DOI	10.1063/1.5017815
Indexed By	SCI
Language	英语
WOS ID	WOS:000429344100029
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/29139
Collection	中科院上海应用物理研究所2011-2019年
Affiliation	1.Ren, XT 2.Yan, XZ 3.Yu, ZH 4.Li, WT 5.Yang, K 6.Wang, XL 7.Liu, YZ 8.Wang, L
Recommended Citation GB/T 7714	Ren, XT,Yan, XZ,Yu, ZH,et al. Size-dependent phase transition of Er2O3 under high pressure[J]. APPLIED PHYSICS LETTERS,2018,112(14):-.
APA	Ren, XT.,Yan, XZ.,Yu, ZH.,Li, WT.,Yang, K.,...&Wang, L.(2018).Size-dependent phase transition of Er2O3 under high pressure.APPLIED PHYSICS LETTERS,112(14),-.
MLA	Ren, XT,et al."Size-dependent phase transition of Er2O3 under high pressure".APPLIED PHYSICS LETTERS 112.14(2018):-.

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