Effect of Different Dopants on the Microwave Properties of M-Doped Barium Hexaferrites

Abstract

Hexagonal ferrites of M-type (BaFe 12 O 19 ) are promising materials to be used as microwave absorbers in the frequency range from 35 to 40 GHz. The substitution of Fe +3 ions by Co +2 ,Ti +4 and Mn +3 decreases the resonance frequency of these materials, so that they can be used as microwave absorbers in the frequency range from 8 to 16 GHz. At the same way, the replacement of Ba +2 ions by La +3 and Na +1 can change the microwave absorption properties of these materials.