| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Local microstructural analysis for Y2O3/Eu3+/Mg2+ nanorods by Raman and photoluminescence spectra under high pressure |
| Jin-Hua Wang(王金华)1,3, Ze-Peng Li(李泽朋)2,3, Bo Liu(刘波)3, Bing-Bing Liu(刘冰冰)3 |
1 School of Science, Tianjin University of Technology and Education, Tianjin 300222, China;
2 School of Science, Civil Aviation University of China, Tianjin 300300, China;
3 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
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Abstract In this paper, we investigate the Raman and photoluminescence spectra of Y2O3/Eu3+ and Y2O3/Eu3+/Mg2+ nanorods under high pressures using 514-nm and 532-nm laser light excitation. We observe transitions from the initial cubic phase to amorphous at pressures higher than 24 GPa for both Y2O3/Eu3+ and Y2O3/Eu3+/Mg2+ nanorods. In addition, Y2O3/Eu3+ and Y2O3/Eu3+/Mg2+ nanorods exhibit different distorted states after the pressure has been raised to 8 GPa. The analyses of intensity ratios, I0-2/I0-1 from 5D0-7F2 to 5D0-7F1 and I0-2A/B of 5D0-7F2 transitions indicate that Y2O3/Eu3+/Mg2+ nanorods exhibit stronger local micro-surrounding characteristics for Eu3+ ions in a pressure-modulated crystal field. The doped Mg2+ ion results in reducing the crystal ionicity in the distorted lattice state under high pressures. The use of doped ions as an ion modifier can be applied to the study of small local microstructural changes through Eu3+ luminescence.
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Received: 17 August 2016
Revised: 28 October 2016
Accepted manuscript online:
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PACS:
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61.46.Km
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(Structure of nanowires and nanorods (long, free or loosely attached, quantum wires and quantum rods, but not gate-isolated embedded quantum wires))
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78.55.Qr
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(Amorphous materials; glasses and other disordered solids)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11304380, 11404241, 11275138, 11604240, and 51320105007) and the Program for Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT1132). |
Corresponding Authors:
Ze-Peng Li, Bing-Bing Liu
E-mail: li_zepeng@163.com;liubb@jlu.edu.cn
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Cite this article:
Jin-Hua Wang(王金华), Ze-Peng Li(李泽朋), Bo Liu(刘波), Bing-Bing Liu(刘冰冰) Local microstructural analysis for Y2O3/Eu3+/Mg2+ nanorods by Raman and photoluminescence spectra under high pressure 2017 Chin. Phys. B 26 026101
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