Electromagnetic Wave Absorption Properties of BaFe12-x(Ti0.5M0.5)xO19 (M = Co, Ni, Zn, Mn, Cu)

This paper describes the magnetic and electromagnetic wave absorption properties, from 1 to 20 GHz, of M-type hexagonal ferrites, in which Fe3+ is replaced by (Ti0.5M0.5)3+ (M = Co, Ni, Zn, Mn, Cu). Samples were prepared by a conventional powder metallurgy method. These ferrites exhibited good microwave absorption properties in the X-band range (8-12 GHz), and the maximum reflection loss was calculated to be between - 20 and - 50 dB. In the case of M = Mn, high μ'' values were obtained, which allowed the matching thickness to be reduced to 0.58 mm. It is possible that these M-type ferrites may find applications as microwave absorbers in the X-band range.