Abstract
We prepare NiZnFe2O4 soft magnetic ferrites with different molar ratios with the layered precursor method and investigate their magnetic properties. In the layered precursor, metal ions are scattered on the layer plate in a certain way on account of the effect of lowest lattice energy and lattice orientation. After high temperature calcinations, spinel ferrites with uniform structural component and single magnetic domain can be obtained, and the magnetic property is improved greatly. NiZnFe2O4 ferrites prepared have the best specific saturation magnetization of 79.15 emu·g−1, higher than that of 68 emu·g−1 prepared by the chemical co-precipitation method and that of 59 emu·g−1 prepared by the emulsion-gel method. Meanwhile the coercivity of NiZnFe2O4 ferrites prepared by layered precursor method is 14 kA·m−1, lower than that of 50 emu·g−1 prepared by the co-precipitation method and that of 59 emu·g−1 prepared by the emulsion-gel method.
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