Conduction Mechanism in (La0.7Ba0.3MnO3)1-x (BaTiO3)x (x=0.05) Compound.

The electronic conduction mechanism in (La0.7Ba0.3MnO3)1-x (BaTiO3)x (x = 0.05) compound have been studied. The structure and phase purity of sample have been characterized using XRD technique. The diffraction pattern is explained on the basis of double phase Rietveld refinement and the calculated structural parameters of both the two phases are determined. It is observed that BaTiO3 significantly shifts the TMI temperature below the room temperature. The conduction mechanism has been analyzed for T<TMI, TMI<T<θD/2 and θD/2<T<300K temperature ranges. The resistivity curve fitting is performed with three degree polynomial fit, variable range hopping model and small polaron hopping model for the respective temperature ranges. The transport properties are studied on the basis of SPH and Mott-VRH formulation. The conduction mechanism is explained by determining several charge transport parameters like residual resistivity ρ0, electronic activation energy Ea, DOS at the Fermi level N(EF), most probable hopping distance Rh(T) and the hopping energy Eh(T). [ABSTRACT FROM AUTHOR]