Abstract
A novel perovskite, PbFe1/2V1/2O3 was successfully synthesized under 7 GPa. PbFe1/2V1/2O3 exhibits a highly distorted tetragonal perovskite structure (c/a = 1.18) with the disordered arrangement of Fe and V at room temperature. The XPS reveals that the oxidation states of each ion are Pb2+, Fe3+, and V5+, respectively. The large tetragonal distortion is related to not only the presence of Pb2+ ion but also V5+ with an electronic configuration of d 0. No structural phase transition up to 490 K above room temperature was observed by a high-temperature X-ray diffraction experiment. The temperature dependence of magnetic susceptibility exhibits non-Curie-Weiss behavior, which is attributed to the antiferromagnetic interaction between Fe3+-O2--Fe3+ originated from the disordered arrangement of Fe3+ and V5+ ions.
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