“…If the intergranular exchange coupling is strong enough, the magnetic properties of nanocomposites can be enhanced by optimizing the intrinsic properties of the magnetic phases such as saturation magnetization and anisotropy field [4,5]. Many experimental results show that a moderate substitution of Co for Fe can increase the saturation magnetization (at room temperature) of magnetically hard and soft phases, and so significantly improve the magnetic properties of (Nd, Pr) 2 Fe 14 B/␣-Fe nanocomposites [6][7][8][9]. The crystal structure of the Pr 2 Fe 14 C phase is analogous to that of the (Nd, Pr) 2 Fe 14 B compounds.…”