STUDIES ON Nd(Feo~,2~xB0~08Gax)5~5 SINTERED PERMANENT MAGNETS

The temperature dependence of the hysteresis loop and of the anisotropy field HA of sintered magnets of the composi- tion Nd(Feo~92~xB0,0BGax)5~5 was investigated using pulsed-field equipment. The analysis based on the nucleation model was per- formed. The spin reorientation temperatures were determined by measurements of the temperature dependence of the initial a.c.- succeptibility x,,(T). It will be shown for the first time that x,,(T) curves can be used to determine the temperature where the FOMP transition starts.