Raman and luminescence studies on phase transition of EuNbO4 under high pressure |
| |
| Affiliation: | [1]Department of Physics, University of Science and Technology of China, Hefei 230026, China; [2]The Centre for Physical Experiments, University of Science and Technology of China, Hefei 230026, China; [3]Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China |
| |
| Abstract: | Raman and luminescence studies on the phase transition of europium orthoniobates (EuNbO4) under high pressure were performed. The pressure dependent Raman spectra revealed that an irreversible phase transition from monoclinic phase to M'-fergusonite phase of EuNbO4 occurred at 7.3 GPa, and the two phases coexisted over a pressure range from 7.3 to 13.7 GPa. An obvious discontinuity on luminescence intensity ratio between 5D0 →7F2 and 5D0→7F1 transitions was observed with increasing pressure, indicating also that a phase transition occurred at 7.3 GPa, which was in agreement with the high pressure Raman spectra data. Meanwhile, the Raman and luminescence spectra in the temperature range of 20–300 K showed the structure stability at low temperatures. |
| |
| Keywords: | phase transition Raman luminescence high pressure low temperature rare earths |
| 本文献已被 CNKI 维普 ScienceDirect 等数据库收录！ |
|
