MAGNETIC PROPERTIES OF HEAT TREATED Nd₃Fe₈₁B₁₆ ALLOY

The hysteresis loop and Mössbauer spectrum of the heat treated Nd3Fe81B16 alloy ribbons annealing at 660°C for 10min. have been measured. A coercive field of about 2kOe and an energy product of about 8MGOe are obtained at room temperature. X-ray diffraction and Mössbauer spectrum analyses show that the high coercivity may originate from the Fe₃B phase containing Nd. The value of remanence and energy product in this alloy are much higher than those of anisotropic BaFe₁₂O₁₉ ferrite, It may be used as a cheap permanent magnet.