Grill, A. & Haberey, F. Appl. Phys. (1974) 3: 131. doi:10.1007/BF00884410
The exchange parameters of BaFe12O19 have been calculated from the temperature dependence of the saturation magnetization using the molecular field theory. Under the assumption that the exchange parameters do not change for diamagnetic substitutions of the Fe3+ ions, it is shown that the temperature coefficient of the magnetization at room temperature cannot be decreased without decreasing the magnetization. Diamagnetic substitution in the octahedralf2 site would solely increase the saturation magnetization.
BaFe12O19 hexaferriteDiamagnetic substitutionsHard magnetic properties