Fabrication,structural and magnetic properties of aluminium substituted Fe 3 O 4 nanoparticles routed through the auto-combustion

Abstract

The nanocrystalline ferrite samples of Fe_(3−x)Al_xO₄ with (x = 0.0, 0.1, 0.5, and 1.0) were synthesized by using auto-combustion technique. The spinel cubic structure with no impurity markings was determined by X-ray diffraction and the lattice constants ranged from 8.398 Å to 8.359 Å. The crystallite sizes, which range from 32.15 nm to 21.38 nm with aluminum, indicate nano-size formation. Micrographs obtained with a FESEM demonstrate that the particles are uniformly distributed and nanoscale in size. Energy dispersive spectral analysis identified the composition of all fundamental elements. Two fundamentally distinct absorption bands, ν₁ and ν₂, were seen in the FTIR spectra from 600 cm⁻¹ to 404 cm⁻¹. The VSM experiments were conducted at room temperature and noticed a decrease in saturation magnetization, coercivity and remanent magnetization with aluminum.