Abstract
We synthesized Sr0.4-xBaxLa0.4Ca0.2Fe10.8Co0.2O19 (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05) through a solid-phase reaction. In this study, the strontium-barium mixed eutectic powders derived from rare earth tailings were used as alternative sources of strontium and barium sources to synthesize M-phase hexaferrite. All the samples have a single M-phase hexaferrite phase and magnetoplumbite structure. The magnetic properties and their correlation with the structure were investigated through magnetic measurements and Mössbauer spectroscopy. The sample with x=0.03 has the optimal magnetic properties at room temperature. This enhancement can be attributed to the combined substitution of Sr2+-Ba2+ ions affecting the 4 f1 site, thereby positively influencing the magnetic properties. The coercivity of the permanent magnet component prepared from the magnetic powder with optimal magnetic properties reaches 356 kA/m. This work provides the possible applications of the ferrite derived from rare-earth tailings.
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