Colloque Cl, Supplkment au Journal de Physique I11 de mars 1997 High Energy Ferrite Magnets

Abstract Lanthanum and zinc substitution in M-type hexaferrite was studied in detail in order to increase the saturation magnetization. For the composition Sro,La,,Fe,l,7Z~,0,,, the saturation magnetization was increased by more than 4% and the uniaxial anisotropy constant (K]) was almost the same as that of non-substituted Ba-ferrite. Furthermore, high energy ferrite magnets having more than 40kJ/m3(5MGOe) were obtained for the first time by the new process for high orientation, high density and submicron-sized grains.