Electrical properties of A /B-site substituted Ni-deficient La„Ni0.6Fe0.3...O3 perovskites with A=Ag+, Pb2+, Nd3+ and B=Mn3+, Ga3+

We report the structural and electron transport properties of a series of compounds where A /B-site substituted Ni-deficient La Ni0.6Fe0.3 O3 compounds with A=Ag+, Pb2+, Nd3+ and B=Mn3+, Ga3+ have been synthesized by a chemical route. Electrical resistivity was used as an indicator to explore the response of La Ni0.6Fe0.3 O3 for different A /B-site substitutions. The rationalized explanation for the variations of resistivity with substitutions was based on the change in bond length and modification of band structure due to substitutional disorder. A variable range hopping conduction approach is employed to explain the temperature variation of resistivity, and the result suggest that disorder-induced localization of charge carriers dominates the electrical transport in these compounds. © 2008 American Institute of Physics. DOI: 10.1063/1.2924424