Antiferromagnetic ordering in PrCuSn and NdCuSn

The magnetic properties of polycrystalline samples of PrCuSn and NdCuSn, including their magnetic structures, were determined by magnetic and neutron diffraction measurements. Both compounds show the hexagonal, CaIn2-type crystal structure and are antiferromagnetic at low temperatures. Below T-N = 3 K, the sine modulated magnetic structure with the wave vector k = (0.349, 0, 0) is observed in PrCuSn, while in NdCuSn below T-N = 9 K the collinear antiferromagnetic ordering described by the wave vector k = (1/2, 0, 0) was detected. In both phases the magnetic moments are parallel to the hexagonal c-axis.