Structural, magnetic, optical and ferroelectric properties of Y3+ substituted cobalt ferrite nanomaterials prepared by a cost-effective sol-gel route

Decreasing of Magnetic Saturation of Yttrium Doped Cobalt Ferrite Prepared by the Sol-Gel Auto-Combustion

“…Simultaneously with the movement of Fe 3+ cations to the tetrahedral sites, a number of Co 2+ ions were transferred from the tetrahedral lattice sites to the octahedral lattice sites. Relocation of cations between octahedral and tetrahedral sites can lead to a lower value in the lattice constant as the annealing temperature increases [19].…”

“…Several papers were reported from previous research with yttrium rare-earth elements as doping in cobalt ferrite nanoparticles. Variations in the molarity concentration of yttrium elements in cobalt ferrite compounds can affect structural, magnetic, and optic properties [19]. The increasing molarity concentration of yttrium-doped cobalt ferrite can decrease lattice strain and the length of the lattice constant [20], reduce magnetic saturation [20,21], and decrease crystallite size [21][22][23].…”

Influence of Y3+ and La3+ ions on the structural, magnetic, electrical, and optical properties of cobalt ferrite nanoparticles

“…It is observed that crystallite sizes of CoY 0.5x La 0.5x Fe 2-x O 4 decreased than pure cobalt ferrite due to difference in ionic radii of doped ions and replaced ions from the interstitial sites and the results matches with ref. [ 8 , 9 , 28 , 29 ]. The specific surface area (S) was calculated by (S) = , here D is crystallite size, and ρ x is X-ray density.…”

“…The calculated strain values show that the as-prepared samples have a positive strain value, which is indicative of the presence of tensile strain. The structural parameters of cobalt ferrite by adding either lanthanum or yttrium were examined by several researchers [ 8 , 9 , 28 , 29 ], but here our study both La 3+ and Y 3+ was doped together. In this research revealed that the prepared samples had increased lattice parameters and density but decreased crystallite sizes, porosity and micro strain than cobalt ferrite.…”

“…K. H. Sharma et al reported that lanthanum-doped cobalt ferrite rings could be utilized on magnetic coils and computer data cables to reduce hysteresis loss [ 11 ]. The incorporation of Y 3+ into CoFe 2 O 4 nanoparticles increases the optical band gap from 3.39 eV to 3.91 eV and decreases the saturation magnetization from 69 emu/g to 42 emu/g noticed by S. B. Das [ 21 ].…”