Ferromagnetic Behavior in the LaKMnMoO₆ Double Perovskite.

Abstract

Magnetic properties Magnetic properties D 9000Ferromagnetic Behavior in the LaKMnMoO 6 Double Perovskite. -The title compound is prepared by solid state reaction of a stoichiometric mixture of La 2 O 3 , K 2 CO 3 , MnO 2 , and MoO 3 (950°C for 72 h, 1100°C for 48 h). As revealed by powder XRD, LaKMnMoO 6 crystallizes in the orthorhombic space group P222. Magnetization measurements indicate a magnetic transition from paramagnetic to ferromagnetic behavior with decreasing temperature. The Curie temperature is determined to be T C = 180 K and the magnetic moment is 5.68 µ B /Mn atom, which is slightly smaller than the Mn 2+ value of 5.90 µ B . -(MEGDICHE, S.; ELLOUZE, M.; CHEIKH-ROUHOU*, A.; MADAR, R.; J.