Analysis of the Temperature Dependence of the Coercive Field of Sm2co17 Based Magnets

In Sm2Co17 based magnets the coercive field is determined by the repulsive or attractive interaction of domain walls with the 1:5 cell walls. With increasing temperature the coercivity mechanism changes from repulsive to attractive pinning and above the Curie temperature of the cell walls a nucleation mechanism may be dominant.