ANGULAR DEPENDENCE OF GRAIN ALIGNMENT AND COERCIVITY FOR SINTERED NdFeB MAGNETS

Angular dependence of the coercivity for sintered NdFeB magnets is inveStigated and the effect of grain alignment on the coercivity is taken into account. The results show that the misalignment of grains makes the coercivity of magnets increase rather than decrease and the starting field theory of coercivity is in better agreement with experiment than both the nucleation and pinning mechanisms.