M-type hexagonal BaFe_(12-2x)Co_xTi_xO_(19) (0≤x≤1.0) ferrite powders prepared by a sol-gel method. The crystallographic and magnetic properties were characterized with a x-ray diffraction (XRD), thermogravimetry (TG), differential thermal analysi...
M-type hexagonal BaFe_(12-2x)Co_xTi_xO_(19) (0≤x≤1.0) ferrite powders prepared by a sol-gel method. The crystallographic and magnetic properties were characterized with a x-ray diffraction (XRD), thermogravimetry (TG), differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), and Mossbauer spectroscopy. The result of XRD measurements show that the a and c lattice parameters increase with increasing x from α=5.882 and c=23.215 Å for x=0.0, to α=5.895 and c=23.295 Å for x=1.0. From the Mossbauer results, the Co²+-Ti⁴+ site occupancies have been affected the changes in the magnetization and in the coercivity. The Curie temperature linearly decreases with increasing Co²+-Ti⁴+ concentration x.