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Phase transformation and fluorescent enhancement of ErF3at high pressure

  • Author(s): Li, W
  • Ren, X
  • Huang, Y
  • Yu, Z
  • Mi, Z
  • Tamura, N
  • Li, X
  • Peng, F
  • Wang, L
  • et al.
Abstract

© 2016 Elsevier Ltd. Pressure-induced phase transformation and fluorescent properties of ErF3were investigated here using in-situ synchrotron X-ray diffraction and photoluminescence up to 32.1 GPa at room temperature. Results showed that ErF3underwent a reversible pressure-induced phase transition from the β-YF3-type to the fluocerite LaF3-type at 9.8 GPa. The bulk moduli B0for low- and high-pressure phases were determined to be 130 and 208 GPa, respectively. Photoluminescencent studies showed that new emission lines belonging to the transition of2H11/2→4I15/2,4S3/2→4I15/2, and4F9/2→4I15/2appeared during phase transition, suggesting pressure-induced electronic band splitting. Remarkably, significant pressure-induced enhancement of photoluminescence was observed, which was attributed to lattice distortion of the material under high pressure.

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