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By: BABLOO CHAURASIYA.
1 Research Scholar, Department of Chemistry, FCEM Faridabad College of Engineering and Management, Faridabad, Haryana, India
Ferrite materials have attracted significant attention in recent decades due to their remarkable magnetic, electrical, and catalytic properties. Spinel ferrites, generally represented by the formula MFe₂O₄ (where M denotes a divalent metal ion such as Ni²⁺ or Co²⁺), have attracted significant attention due to their versatile applications in areas including magnetic storage, microwave absorption, sensing technologies, transformers, and catalysis. . In particular, nickel–cobalt mixed ferrites (NiₓCo₁₋ₓFe₂O₄) are of considerable interest since the substitution of Ni²⁺ and Co²⁺ ions in the spinel lattice can significantly influence the structural, magnetic, and electrical properties of the material. By varying the nickel and cobalt composition, it becomes possible to tailor the ferrite properties for specific technological applications. The synthesis route plays an important role in controlling the phase purity, particle size, and microstructural characteristics of ferrites. Precursor combustion methods using hydrazine-based complexes are especially useful because they allow the preparation of homogeneous nanosized ferrite particles at relatively lower temperatures. Hydrazine acts as both a coordinating ligand and a fuel during thermal decomposition, facilitating the formation of fine metal oxide powders.
In this study, NiₓCo₁₋ₓFe₂O₄ ferrites with varying nickel concentrations are synthesized through hydrazinated metal–succinate precursors and characterized using various structural and spectroscopic techniques to understand their solid-state chemistry and magnetic behavior.
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