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Title: Photoluminescence studies of Y{sub 2}O{sub 3}:Eu{sup 3+} under high pressure

The Eu-doped yttria (Y{sub 2}O{sub 3}:Eu{sup 3+}) has been investigated by the in situ high-pressure angle dispersive synchrotron X-ray diffraction (XRD) and the photoluminescence (PL) spectroscopy. The red shift and intensity ratio variation of emissions with increasing pressure were observed and elucidated. It was found that the red shift of emissions is related to the expansion of the f orbit of the Eu{sup 3+} and the intensity ratio variation of emissions is ascribed to the change of the crystal field under high pressure. The pressure-induced changes in spectrum are related to the phase transition, which was confirmed by XRD pattern. The two high pressure phases were identified as the monoclinic (C2/m) phase and hexagonal (P-3m1) phase by the Rietveld refinement.
Authors:
; ; ; ;  [1] ;  [2] ;  [1] ;  [3] ;  [4]
  1. State Key Laboratory of Superhard Materials, Jilin University, Changchun, Jilin 130012 (China)
  2. Department of Electrical and Computer Engineering, Lehigh University, Bethlehem, Pennsylvania 18015 (United States)
  3. (China)
  4. Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409 (United States)
Publication Date:
OSTI Identifier:
22271272
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AUGMENTATION; CRYSTAL FIELD; DOPED MATERIALS; EMISSION SPECTRA; EMISSION SPECTROSCOPY; EUROPIUM IONS; MONOCLINIC LATTICES; PHASE TRANSFORMATIONS; PHOTOLUMINESCENCE; PRESSURE DEPENDENCE; RED SHIFT; VARIATIONS; X-RAY DIFFRACTION; YTTRIUM OXIDES