Abstract
Nanoparticles of lanthanum-substituted magnesium zinc ferrites with general formula Mg0.6Zn0.4La2yFe2−2yO4 (where y = 0.0, 0.05, 0.1, 0.15, 0.20 and 0.25) were prepared by employing co-precipitation (wet chemical) method. Phase formation was evaluated by X-ray diffraction analysis. Scanning electron microscopic analysis revealed interlocked nanoparticles exhibiting grain size varies between 300 and 95 nm. Initial permeability (µi) and Curie temperature (TC) decrease with lanthanum content. The synthesized lanthanum-substituted Mg–Zn ferrite nanoparticles displayed single-domain ferromagnetic behaviour below Curie temperature TC and superparamagnetic cluster above TC. The effects of lanthanum substitution on structural, electrical and magnetic properties of Mg–Zn ferrites were studied. The present investigation revealed that lanthanum substitution and content have great influence on the structural, electrical and magnetic properties of Mg–Zn ferrites.
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