Shear stress induced phase transitions of cubic Eu2O3 under non-hydrostatic pressures

Pressure-induced phase transitions in cubic Eu2O3 subjected to non-hydrostatic conditions have been studied by situ high-pressure synchrotron angle dispersive x-ray diffraction and Raman scattering measurements up 30.1 43.8 GPa, respectively. Both spectroscopy results indicate that the pressure-induced transition routines of depend on nature stress loading. In contrast our previous studies under hydrostatic pressure, where transforms directly into a hexagonal structure, data show begins transform monoclinic at pressure about 4.3 while is initiated 6.4 GPa. These also confirmed spectroscopy; stable least GPa; material decompressed from high pressures composed phase, showing irreversible due constructive nature. Pressure coefficients peaks Grüneisen mode parameters cubic, monoclinic, phases followed were determined. Furthermore, this study provides evidence for shear stress-induced corresponding mechanism.