Dieletric and magnetic properties of ZnTi substituted M‐type barium hexaferrite

Abstract

Abstract The ZnTi substituted barium hexaferrite polycrystalline samples have been synthesized by solid‐state reaction method. The complex permittivity and permeability measurements are carried out on the BaFe 12–2 x Zn x Ti x O 19 (0.2 ≤ x ≤ 0.6) samples in the microwave frequency range of 8–13 GHz by cavity perturbation technique. The observed abnormal dielectric behavior, i.e., an increasing tendency of dielectric constant with frequency has been attributed to the mixed conduction. The effect of ZnTi substitution on the permittivity and dielectric loss has been investigated in the frequency range of 1 kHz–1 MHz as well. The increase in concentration of ZnTi dopants monotonically increases both the permittivity and the permeability in the investigated frequency ranges, which can be attributed to increased polarizability and unpinning of the domain walls, respectively.