Magnetic ordering in HoFe0.33 Ge2

The magnetic ordering of HoFe0.33Ge2, crystallizing in the orthorhombic structure of the CeNiSi2-type has been investigated by neutron diffractometry in the temperature range between 1.6 and 15.2 K. Ho magnetic moments in HoFe0.33Ge2 have been found to order antiferromagnetically below 8 K. HoFe0.33Ge2 magnetic structure corresponds to propagation vector k⇒=12,12,0 and, on the basis of a group-theoretical analysis, is found to be based on the irreducible representation τ1. Also bulk magnetic measurements (susceptibility and magnetization) are reported.