Abstract
Electrodeposition of NiFe2 alloy from a non-aqueous ethylene glycol sulfate bath followed by electrochemicaloxidation (anodization) of the alloy in an aqueous bath at room temperature isdescribed as a novel electrochemical process to deposit spinel nanocrystallineNiFe2O4 thin films on different conducting substrates. Various electrochemical parameters such as bathcomposition, current density, deposition time and bath temperature for electrodeposition of theNiFe2 alloy and its anodization have been studied and optimized to obtain good qualityNiFe2O4 films. The crystal structure, composition, surface morphology and microstructure of thefilms have been studied using a variety of techniques. Air annealing of the as-depositedNiFe2O4 thinfilms at 500 °C for 5 h improves the crystallinity and morphology of the films.
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