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Title: Size-dependent phase transition of Er 2 O 3 under high pressure

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.

Authors:
 [1];  [1]; ORCiD logo [1];  [2];  [3];  [4];  [5];  [1]
  1. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China
  2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China; Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
  3. Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201800, China
  4. School of Physics and Electronic Engineering, Linyi University, Linyi 276005, China
  5. Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division; National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1461492
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 112; Journal Issue: 14; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English

Citation Formats

Ren, Xiangting, Yan, Xiaozhi, Yu, Zhenhai, Li, Wentao, Yang, Ke, Wang, Xiaoli, Liu, Yuzi, and Wang, Lin. Size-dependent phase transition of Er 2 O 3 under high pressure. United States: N. p., 2018. Web. doi:10.1063/1.5017815.
Ren, Xiangting, Yan, Xiaozhi, Yu, Zhenhai, Li, Wentao, Yang, Ke, Wang, Xiaoli, Liu, Yuzi, & Wang, Lin. Size-dependent phase transition of Er 2 O 3 under high pressure. United States. doi:10.1063/1.5017815.
Ren, Xiangting, Yan, Xiaozhi, Yu, Zhenhai, Li, Wentao, Yang, Ke, Wang, Xiaoli, Liu, Yuzi, and Wang, Lin. Mon . "Size-dependent phase transition of Er 2 O 3 under high pressure". United States. doi:10.1063/1.5017815.
@article{osti_1461492,
title = {Size-dependent phase transition of Er 2 O 3 under high pressure},
author = {Ren, Xiangting and Yan, Xiaozhi and Yu, Zhenhai and Li, Wentao and Yang, Ke and Wang, Xiaoli and Liu, Yuzi and Wang, Lin},
abstractNote = {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.},
doi = {10.1063/1.5017815},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 14,
volume = 112,
place = {United States},
year = {2018},
month = {4}
}