Magnetic Properties of Nd(Fe-M) 12 Compounds

Mo-substituted Nd(Fe-Mo) 12 N x compounds were investigated. The ThMn 12 crystal structure was obtained for an RFe 11 Mo composition by optimizing the solution treatment temperature. NdFe 11 Mo shows a high saturation magnetization and Curie temperature, and has a higher anisotropy field than NdFe 11 TiN x . The NdFe 11 MoN x magnet produced by mechanical alloying had a (BH) max of 64 kJ/m 3 (8 MGOe). Recent theoretical approaches to YFe 11 TiN compounds are reviewed.