Magnetic ordering in HoFe0.33 Ge2

Abstract The magnetic ordering of HoFe 0.33 Ge 2 , crystallizing in the orthorhombic structure of the CeNiSi 2 -type has been investigated by neutron diffractometry in the temperature range between 1.6 and 15.2 K. Ho magnetic moments in HoFe 0.33 Ge 2 have been found to order antiferromagnetically below 8 K. HoFe 0.33 Ge 2 magnetic structure corresponds to propagation vector k ⇒ = 1 2 , 1 2 , 0 and, on the basis of a group-theoretical analysis, is found to be based on the irreducible representation τ 1 . Also bulk magnetic measurements (susceptibility and magnetization) are reported.