CAS OpenIR  > 中科院上海应用物理研究所2011-2020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
AbstractThe 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.
KeywordRare-earth Sesquioxides Structural Transformations Ab-initio Nanocrystals Amorphization Stability Shape
Indexed BySCI
WOS IDWOS:000429344100029
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Document Type期刊论文
Affiliation1.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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