Synthesis of rod-shaped BaCoxTixFe12−2xO19 by precipitation-topactic reaction method and investigation of magnetic properties

Rod-shaped BaCoxTixFe12−2xO19 was prepared by precipitation-topactic reaction method with using needle-like α-FeOOH as a template, and its formation process, morphology, phase components and magnetic performances were investigated by XRD, FT-IR, SEM, EDS and VSM. The experimental results show that the prepared rod-shaped BaCoxTixFe12−2xO19 contains a small amount of middle phase α-Fe2O3, and with the content of (Co2+, Ti4+)-doping ions raising the contained middle phase increases. The dependence of the length-diameter ratio on the content of (Co2+, Ti4+)-doping ions is associated with the contained middle phase. With the content of (Co2+, Ti4+)-doping ions increasing, the prepared rod-shaped BaCoxTixFe12−2xO19 presents a slow reduction of coercivity, and the development of its saturation magnetization displays a drop followed by a slight increase. The shape anisotropy and occupancy of doping ions may play important role in the magnetic performance of prepared rod-shaped BaCoxTixFe12−2xO19.