稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
9期
787-791
,共5页
侯纪伟%陈桥%郜婵%代如成%张建武%王中平%张增明%丁泽军
侯紀偉%陳橋%郜嬋%代如成%張建武%王中平%張增明%丁澤軍
후기위%진교%고선%대여성%장건무%왕중평%장증명%정택군
phase transition%Raman%luminescence%high pressure%low temperature%rare earths
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’-fergu-sonite 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 between5D0→7F2 and5D0→7F1 transitions was observed with increasing pressure, in-dicating also that a phase transition occurred at 7.3 GPa, which was in agreement with the high pressure Raman spectra data. Mean-while, the Raman and luminescence spectra in the temperature range of 20-300 K showed the structure stability at low temperatures.
