Abstract
Nanocrystalline manganese zinc ferrites (Mn X Zn1−XFe2O4) powders with Mn2+ ions ratio (x) varying from 0.3 to 0.9 have synthesized by co-precipitation method. The results show that single Mn X Zn1−XFe2O4 phase forms at annealing temperature 1000°C for 2 h. The lattice parameter and crystallite size of the produced Mn-Zn ferrites powders increase with increasing the Mn2+ ion molar ratio. The microstructure and magnetic properties of the produced Mn X Zn1−XFe2O4 powders depend on the temperature and Mn2+ ion content. The morphology of Mn0.8Zn0.2Fe2O4 powder clearly appears as a homogeneous octahedral-like structure. The saturation magnetization of the Mn-Zn ferrite powders increase as the result of increasing Mn2+ ion ratio to 0.8. A high saturation magnetization (73.64 emu/g) achieves for the Mn0.8Zn0.2Fe2O4 powders annealed at 1100°C for 2 h.
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