Phase composition and magnetic properties in nanocrystalline permanent magnets based on misch-metal

The magnets were prepared using the misch-metal from Bayan Obo. Crystal structure of Re2Fe14B and the abnormal R-rich phase is observed in the figures. Accompanied by an increase of the pinning effect of domain wall, coercivity of MM-Fe-B ribbons increase since abnormal R-rich phase weakens intergranular exchange coupling.82