Magnetic ordering of Cu inGd2CuO4

Abstract
Neutron-diffraction investigations have been performed to determine the magnetic ordering of Cu ions in a enriched158 Gd2 CuO4 single crystal. The Cu magnetic moments in Gd2 CuO4 are found to order at about 285 K to an antiferromagnetic structure with the propagation vector k=(1/2,1/2,0). The antiferromagnetic structure is similar to that of La2 NiO4. The magnetic moments of Cu ions are oriented parallel to [110].