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The synthesis under controlled oxygen partial pressure and the characterization of a layered perovskite system Sr2V1−xMoxO4

We have successfully synthesized Sr2V1−xMoxO4 from x = 0.3 to 1.0 by an improved process. The layered compound Sr2VO4 is an antiferromagnetic insulator with S = 1/2, while the isostructural Sr2MoO4 is a Pauli paramagnetic metal. The solid solution Sr2V1−xMoxO4 of these materials is expected to show a metal–insulator transition. In this paper we report the synthetic process and the results of the magnetic susceptibility and the electrical resistivity. The selection of the starting materials and the adjustment of O2 partial pressure of less than 10−12 atm were indispensable for the synthesis. The reducing conditions during the sintering had been determined rationally, according to thermodynamical analysis. Kondo-like behavior in both resistivity and magnetic susceptibility were observed in a limited range of V-containing samples.