The structural stability and electrical properties of Sr2FeMoxNb1-xO6 (x = 0, 0.3) under high pressure

The resistance-pressure (R-P) and capacitance-pressure (C-P) relationships for the compounds Sr2FeMoxNb1-xO6 (x = 0, 0.3) have been studied in the pressure range of 0-20 GPa using a diamond anvil cell at room temperature. According to the analysis of energy dispersive x-ray diffraction with synchrotron radiation, in the range of experimental precision, the changes in R-P and C-P for Sr2FeNbO6 and Sr2FeMo0.3Nb0.7O6 at about 7.5 and 2.8 GPa, respectively, are considered as electronic transitions caused by high pressure.