Abstract
Abstract A series of double B mixed perovskite oxides La0.75K0.25Mn1−xFexO3 (x = 0.2–0.5) were synthesized under mild hydrothermal conditions and characterized by powder X-ray diffraction, SEM, ICP, XPS, iodometric titration, and SQUID. All the compounds corresponded to orthorhombic structure of space group Pnma and presented a cuboid morphology. The oxidation state of Fe is +3 whereas Mn is a mixed valence of Mn3+/Mn4+. The curves M vs. T for all the compositions indicated the coexistence of ferro- and antiferromagnetic contribution.
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