Cs. Prakash et al., SUBSTITUTIONAL EFFECT OF MAGNETIC-BEHAVIOR IN CALCIUM HEXAFERRITE, Journal of magnetism and magnetic materials, 140, 1995, pp. 2089-2090
Three hexaferrites CaFe(4)Me(8)O(19) (Me = Al, Cr, or Co) are prepared
and found to have M-structure. The substitution of Al+3 or Cr+3 ions
in the lattice reduces the magnetization, whereas Co+3 enhances it wit
h higher Curie temperature. These differences are explained on the bas
is of exchange interactions within the sub-lattices. Static electrical
resistivity of the samples is also studied and results show that they
are semiconductors.