Abstract
Co–Mn ferrites with a nominal composition LixCo0.5Mn0.5−xFe2O4 (0.0≤x≤0.3) are prepared by calcining precursor oxalates in air. The effects of composition and calcination temperatures on their structure, morphology, and magnetic properties are studied. A high-crystallized LixCo0.5Mn0.5−xFe2O4 with a cubic structure is obtained when the precursor is calcined at 950°C in air for 3h. All the Li+ substituted Co–Mn ferrites exhibit typical spinel structure. Moreover, lattice parameters of LixCo0.5Mn0.5−xFe2O4 decrease and crystallite size increases with increasing Li+ content, leading to an increase of the specific saturation magnetization and a decrease of the coercive field and the magnetic anisotropy constant.
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