Magnetic properties of Zn-Sn-substituted Ba-ferrite powders prepared by ball milling

The present investigation reports the preparation of BaFe12−2xZnxSnxO19 ferrite powders via ball milling and subsequent heat treatment. Starting powders were milled during 50 and 100 h, and then heat treated at 950 and 1000°C to induce crystallization and reaction of the starting materials. XRD results showed that it is possible to obtain single-phase barium ferrite powders if processing conditions are carefully chosen. The powders were also characterized for magnetic properties, namely saturation magnetization and intrinsic coercivity. It was found that coercivity could easily be controlled by varying the dopants content, while maintaining a relatively high magnetisation.