Defect structure, electronic conductivity and expansion of properties of (La1−xSrx)sCo1−yNiyO3−δ

Electronic conductivity as function of temperature for (La0.8Sr0.2)0.99Co0.8Ni0.2O3−δ. A model with metallic like conductivity for the extrinsic p-type charge carrier (due to Sr substitution) and small polaron conductivity for intrinsic charge carriers (due to Co spin transitions) was found to best describe the total conductivity.