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The effect of substitution of Mn on the structure and magnetic properties of HoFe 12- x Mn x (x =2 0, 3 0, 4 0 and 5 0) compounds was investigated. All the HoFe 12x Mn x compounds studied crystallize in ThMn 12 type of structure. The lattice constants and unit cell volume increase monotonously with increasing Mn concentration. The Curie temperature and the moments of the transition metal sublattice of HoFe 12- x Mn x compounds decrease monotonously with increasing Mn content. A minimum appears at x =3 0 in the Mn concentration dependence of the saturation magnetization of HoFe 12- x Mn x compounds. A compensation point appears in the M(t) curve of the compound with x =4 0. The mean field constant n RT of HoFe 9Mn 3 was calculated.
The effect of substitution on Mn on the structure and magnetic properties of HoFe 12-x Mn x (x = 20, 30, 40 and 50) was investigated. All the HoFe 12x Mn x compounds studied crystallize in ThMn 12 The lattice constants and unit cell volume increase monotonously with increasing Mn concentration. The Curie temperature and the moments of the transition metal sublattice of HoFe 12-x Mn x compounds decrease monotonously with increasing Mn content. A minimum appears at x = 3 0 in the Mn concentration dependence of the saturation magnetization of HoFe 12-x Mn x compounds. A compensation point appears in the M (t) curve of the compound with x = 4 0. The mean field constant n RT of HoFe 9Mn 3 was calculated.