Experimental Assessment of Coercivity Microstructural Parameters of a Nd-Fe-B Sintered Magnet

We examined the microstructural parameter α in order to investigate the influence of its components on the intrinsic coercivity of an isotropic Nd-Fe-B sintered magnet. By applying boundary conditions for the assessment of grain (mis)alignment α
_ψ
and exchange coupling α
_exc
and combining with magnetic measurements and structural characterization results obtained by magnetic small angle neutron scattering, the parameter α
_K
-associated with the reduction of the magnetocrystalline field-plays a major role on the reduction of coercivity of the case study. Approaches in determining (α
_K
) are also discussed.