Solid oxide PrBaCoGaO (PBCG) is synthesized using a glycerol-nitrate route. XRD and SEM techniques are utilized in order to confirm the structural and microstructural composition of the attained ceramics. The high-temperature electrical conductivity and thermopower of the sintered PBCG sample are measured in a wide range of external conditions. It is shown that Ga doping results in ∼30% increase of conduction properties. The observed peculiarity is interpreted in terms of a recently proposed electronic transport model. It is argued that the respective enhancement of conductivity originates from the combined increase of polaron hopping frequencies along with a decline of carriers' effective mass in the metallic subsystem of PBCG.
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