“…Transition-metal nitrides may be used as hard metals to make wear-resistant materials due to the magnetic properties of these nitrides. Iron nitrides are characterized by their high saturation magnetization and low coercivity [7,8] and many papers are devoted to enhancing the magnetic qualities of the perovskite nitride, ␥ -Fe 4 N, as a coercive field by metallic substitutions [1][2][3][4][5]. The effects of different substitutions on M x Fe 4−x N ternary perovskite nitrides (where M = Fe, Mn, Au, Ag, Sn, Pd, Ni, Pt, In, Zn, and Cu) have been reported [6,[9][10][11][12][13][14][15].…”