Effect of V5+ substitution on structural and electrical properties of La2Mo2O9

La2Mo2-xVxO9-δ (0≤ ×≤0.100) has been synthesized using solution combustion method. The specimens were subjected to structural and electrical characterizations. X-Ray diffraction, DSC and the conductivity vs temperature plot reveal the stabilization of cubic structure for ×≥ 0.050. At temperature 425 °C, transition from Arrhenius to VTF behaviour is observed for the compositions ×≥ 0.050. The conductivities of V-doped compounds (for ×≥ 0.050) have been found to increase in the intermediate temperature range (425–510 °C) as compared to the parent compound. The conductivities of the parent compound in the cubic region are observed to be marginally higher than the β-stabilized vanadium substituted compounds. Among the β-stabilized compositions, x = 0.050 exhibit the highest conductivities in the intermediate temperature range as well as in the high-temperature regime. •La2Mo2-xVxO9-δ (0 ≤ x ≤ 0.100) has been synthesized via solution combustion technique.•XRD, DSC and conductivity vs temperature plot suggest that for x=0.050 β-polymorph is stabilized at the room temperature.•In the intermediate temperature range 425–510 conductivity of the specimens x ≥ 0.050 enhances by one order as compared to parent compound.•The conductivities of the parent compound in the cubic region are marginally higher than the β-stabilized compounds.