ON THE MAGNETIZATION MECHANISMS IN POLYCRYSTALLINE HEXAFERRITES

An attempt was made to adapt the domain-wall size model to the explana tion of magnetization mechanisms in real polycrystalline hard ferrites (SrFe12O19). Some new data concerning the total anisotropy specifical ly for polycrystals were discussed and its value deduced from natural spill resonance measurements. It was observed that samples with differ ent H-eff grain size and shape, can present different hysteresis loops . To explain these differences, we applied the theoretical expressions for the magnetization curve and the hysteresis loop developed earlier .