Structural, optical and electrical characterization of Ba2YbTaO6

The double perovskite oxide Ba2YbTaO6 (BYT) comprising of a rare earth material was prepared using solid state ceramic route. The structural investigation proposes the cubic phase of BYT with Fm (3) over barm space group. The optical band gap of BYT is 3.95 eV which was calculated by means of the UV-visible absorption spectrum. The frequency dependent dielectric characterization of BYT was done in between temperatures 303 K and 623 K. The relaxation behavior of BYT was examined utilizing the Cole-Cole model. The frequency reliant conductivity curves were analyzed using the power law. The hopping mechanism responsible for conduction in BYT is due to the p-type polaron hopping which is corroborated by the activation energy value of 0.5 eV.