Abstract
The optical properties of Tb2O3 under extreme conditions are of interest because Tb2O3 is widely used for optical devices. In this study, the effect of high-pressure loading on Tb2O3 powder subjected to shock compression was structurally and spectroscopically investigated. The shock-compressed samples were recovered from a high-pressure state to ambient conditions and then characterized by X-ray diffraction analysis, photoluminescence (PL) measurement, and Raman spectroscopy. The onset of the cubic (C-type) to monoclinic (B-type) phase transition of Tb2O3 was confirmed for a sample shocked at 4.3 GPa. The C- and B-type phases coexist between 4.3 and 29 GPa. Changes in the PL excitation PL spectra associated with an increase in yield to the B-type phase were observed. The chromaticity coordinates for the shocked samples indicated that emission color was changed from green to yellowish-green.
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