Electromagnetic properties of BaFe12O19:Ti at centimeter wavelengths

Highlights: • Growth of barium hexaferrite single crystals BaFe₁₂O₁₉, BaFe_11.5Ti_0.5O₁₉, BaFe₁₁Ti₁O₁₉ and BaFe₁₀Ti₂O₁₉. • Structure characterization depending on Ti-content. • Centimeter-wave characterization of BaFe₁₂O₁₉, BaFe_11.5Ti_0.5O₁₉, BaFe₁₁Ti₁O₁₉ and BaFe₁₀Ti₂O₁₉ slabs. BaFe_12-xTi_xO₁₉ (x = 0.5, 1, 2) solid solutions were synthesized by solid state reaction at 1350 °C for pure BaFe₁₂O₁₉ and 1400 °C for Ti-substituted samples for 3 h in the air. The phase purity of the final products was verified by X-ray diffraction. The decrease of Curie temperature of the solid solutions from 450 to 240 °C was induced by x changes from 0 to 2. The electromagnetic parameters of the BaFe_12-xTi_xO₁₉ (x = 0.5, 1, 2) ferrites were measured in the frequency range of 8–12 GHz using the transmission line method.