Abstract
Polycrystalline compound Pr0.67Sr0.16Ca0.17Mn0.75Fe0.25O3 was prepared by the conventional solid-state reaction. Structural, magnetic and electrical measurements were investigated. The XRD data have been analyzed by Rietveld refinement technique which reveals that the sample is crystallized in an orthorhombic structure with Pbnm space group. Temperature dependences of the magnetization in both field cooled and zero field cooled modes show the coexistence of ferromagnetic and antiferromagnetic interactions for Pr0.67Sr0.16Ca0.17Mn0.75Fe0.25O3. The analysis of electrical resistivity data shows the semiconductor behavior in all temperatures, which can be explained by small polaron hopping and Mott's variable range hopping (VRH) models. It was found that the transport mechanism is dominated by the VRH model.