The Structural and Magnetic Properties of Gadolinium Doped CoFe₂O₄ Nanoferrites

Abstract

Gadolinium substituted cobalt ferrite CoGd x Fe 2− x O 4 ( x = 0, 0.04, 0.08) powders have been prepared by a sol‐gel autocombustion method. XRD results indicate the production of a single cubic phase of ferrites. The lattice parameter increases and the average crystallite size decreases with the substitution of Gd 3+ ions. SEM shows that the ferrite powers are nanoparticles. Room temperature Mössbauer spectra of CoGd x Fe 22− x O 4 are two normal Zeeman‐split sextets, which display ferrimagnetic behavior. The saturation magnetization decreases and the coercivity increases by the Gd 3+ ions.