| Abstract | We have determined the magnetic structures of Nd₅Si₄ and Nd₅Ge₄ by means of high-resolution neutron powder diffraction. The crystal space groups of these compounds are tetragonal P4₁2₁2 and orthorhombic Pnma, respectively. Their magnetic ordering temperatures are 66(2) and 51(2) K, respectively, and both magnetic structures can be described as canted structures, with net antiferromagnetism in one plane with ferromagnetism perpendicular to that plane. The magnetic space groups are P4₁2₁'2' and Pnm'a' and their ferromagnetic ordering directions are [001] and [100], respectively. |
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