Ferromagnetic order in U2NiSi3

Abstract Neutron scattering and magnetization measurements have been performed on a single crystal of U 2 NiSi 3 . Development of long-range ordered ferromagnetic domains, instead of spin glass freezing, was observed below 30 K. The ordered moment is (0.6 ±0.1) μ B per uranium atom and lies perpendicular to the hexagonal axis.