Abstract
We describe the influence of the temperature of sintering on the structure and the static magnetic properties in Ni 0.5Zn 0.5Sm x Fe 2– x O 4 ferrites prepared by combustion synthesis. The increase in Sm content increases the lattice parameter and decreases the mean grain size. The material treated at 600 °C should be single spinel ferrite but with low magnetization saturation. Calcinations carried out at 800 and 1000 °C resulted in materials with cubic spinel phase, but a small amount of SmFeO 3 was also formed. A smooth diminution of the saturation magnetization with an increase in Sm amount was observed. The highest Curie temperatures were obtained for sample treatment at 1000 °C with higher Sm content.
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