Studies on Nd(Fe/sub 0.92-x/B/sub 0.08/ Ga/sub x/)5.5 sintered permanent magnets

The temperature dependence of the hysteresis loop and the anisotropy field H/sub A/ of sintered magnets of the composition Nd(Fe/sub 0.92-x/B/sub 0.08/Ga/sub x/)/sub 5.5/ was investigated using pulsed-field equipment. Analysis based on the nucleation model was performed. The spin reorientation temperatures were determined by measurements of the temperature dependence of the initial AC susceptibility chi /sub ac/(T). It is shown that chi /sub ac/(T) curves can be used to determine the temperature where the FOMP (first-order magnetization process) transition starts.<
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