IMF2017

Nano-crystalline powders of La-doped and pure Sr₂CoMoO₆ (SCMO) have been synthesized by using conventional solid state route. The powders were calcined at 1150 ºC and pressed into pellets which were sintered at 1350 ºC in air. XRD and SEM analysis of prepared samples show single phase solid solution with negligible percentage of extra phases and dense microstructure of varying grain size. Rietveld refinement reveals the double perovskites crystal structure with I4/m Space group. Thermoelectric properties were measured in the temperature range of 0 - 900 ºC. It is interesting to notice that when pure SCMO samples were annealed in reducing atmosphere it induces n-type behaviour and triggers the conductivity into two order higher than the conductivity of normally sintered samples thus resulting into enhanced power factor. Furthermore, we have doped lanthanum at the place of strontium to provide more charge carriers into lattice.