The magnetic and electronic properties of double perovskite Sr2-xLaxVMoO6 (x = 0.9-1.2) polycrystalline bulk samples have been investigated. Magnetization and electrical resistivity measurements indicate that Sr2-xLaxVMoO6 is an antiferromagnetic metal with an antiferromagnetic transition temperature in the range 123-146 K. X-ray photoemission spectroscopy measurements reveal that Mo has a tetravalent state (Mo4+) and V has a trivalent state (V3+) in SrLaVMoO6. These results indicate that V3+ (3d(2)) ions are antiferromagnetically coupled with Mo4+ (4d(2)) ions. Electron-doping effects of Sr2-xLaxVMoO6 by La substitution differed from those of half-metallic Sr2-x LaxFeMoO6. This can be qualitatively explained by considering the different electron-doped orbitals and ordering ratios of B-site ions between Sr2-xLaxVMoO6 and Sr2-xLaxFeMoO6 (Mo/V or Mo/Fe). (C) 2011 The Japan Society of Applied Physics
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