Magnetic properties of double perovskites Ba2−xLaxFeMoO6

Abstract Effects of the partial substitution of La 3+ for Ba 2+ on the magnetic properties of double perovskite Ba 2 FeMoO 6 have been investigated. Polycrystalline Ba 2− x La x FeMoO 6 samples have been prepared by the conventional solid-state reaction in a stream of 5% H 2 /Ar gas at various sintering temperatures. With increasing x, saturation magnetization decreases systematically, however, Curie temperature is enhanced at a rate of 2 K/% for La substitution at the Ba site.