Figure 6
Pressure-induced anion disordering in Dy2Ti2O7. (a) Ratio of intensity between the Raman mode of the distorted TiO6 octahedra (I2) and the main F2g Raman mode of the ordered pyrochlore (I1). This serves as a qualitative indicator of the progression of anion disorder as a function of pressure. Inset identifies the two modes in a representative high-pressure Raman spectrum. (b) Pressure derivatives of the intensity ratio data plotted in (a). This serves to better define the change in intensity ratio as a function of pressure. Inset focuses on the region of interest where the ratios begin to rapidly increase. Legends indicate the samples.
