Quantitative characterization of additional ferromagnetic phase in melt-quenched and sintered Nd–Fe–B-based magnets.

Provides a quantitative evidence of a ferromagnetic iron-rich minor phase present in both melt-quenched/die-upset and sintered magnets based on the Nd[sub2]Fe[psub14]B composition. Determination of hysteresis loops; Saturation magnetization of the minor phase; Paramagnetic slope of the major phase; Calculated volume of the impurity phase in the die-upset magnets.