EFFECT OF GRAIN ALIGNMENT ON THE COERCIVITY FOR SINTERED NDFEB MAGNETS

Taking account of the effect of the degree of grain alignment on the c oercivity, the angular dependence of the coercivity for sintered NdFeB magnets is discussed in terms of various coercivity mechanisms. The c omparison between various theoretical results and experiments indicate s that the misalignment of the gains makes coercivity of the magnets i ncrease rather than decrease and the starting field theory of coercivi ty is in better agreement with experiments than either the nucleation or pinning mechanisms.