Structural, vibrational, electrical, and magnetic properties of mixed spinel ferrites Mg1-xZnxFe2O4 nanoparticles prepared by co-precipitation

Abstract

Mg1-xZnxFe2O4 (where x = 0.0, 02, 0.4, 0.5, 0.6 and 0.8) nanoparticles were synthesized using co-precipitation. A detailed investigation of the structural, electrical, magnetic and optical properties was carried out for the synthesized samples using X-ray diffraction (XRD), current-voltage (I-V) measurements, vibrating sample magnetometer (VSM) and Raman spectroscopy, respectively. Rietveld refinement fitting revealed that the structure of these samples is cubic spinel with space group Fd3m, and the lattice parameter decreases linearly with increasing Mg-content due to the smaller ionic radius of the Mg2+ ion. Five Raman modes were predicted for the spinel structure, and the A1g Raman mode split into three branches, where each one belong to each ions like Zn2+, Mg2+, and Fe3+ in the tetrahedral positions. The magnetization showed an increasing fashion with the increasing Mg concentration due to the cation rearrangement at the tetrahedral and octahedral sites. The isothermal magnetization curves collected at room temperature showed a paramagnetic (PM) to ferrimagnetic (FiM) transition as the Mg content was increased in Mg1-xZnxFe2O4. Both magnetic and structural properties of ZnMg-ferrite nanoparticles strongly depend upon the Mg2+ cation doping percentage. Current-voltage (I-V) measurements show that electrical resistivity increases with increasing Mg content.

Effect of Transition Metal on Structural and Dielectric Properties of Mg0.5Tm0.5Fe2O4 (Tm = Zn and Cu) System

“…The refined values of lattice parameters are a = 8.3932 Å for Mg 0.5 Zn 0.5 Fe 2 O 4 and a = 8.3679 Å for Mg 0.5 Cu 0.5 Fe 2 O 4 . These parameters are consistent with the previously reported results [13]. The slight variation in the lattice parameters may be related to the anion-cation distance for the interstitial A-and B-site in the spinel structure, which could be correlated with the fraction of Mg 2+ , Fe 3+, and Zn 3+ ions among these sites directly.…”

Electromagnetic Interference Shielding and Physical-Mechanical Characteristics of Rubber Composites Filled with Manganese-Zinc Ferrite and Carbon Black

“…In the case of magnetically soft ferrites, the spinel structure is the most preferred. Spinel ferrites are very stable due to their stable crystal structure and they are predominantly ionic [ 12 ]. They are composed from tetrahedral and octahedral sites, in which metal ions are trapped with oxygen ions.…”

A study on microstructure and magnetic properties of nanostructured CoxNi1-xMn0.5Fe1.5O4(x=0,0.25,0.5,0.75,1) spinel ferrites

“…A variation in the average lattice parameter a with varying Co 2+ concentration in ferrite compounds fulfilled the conditions of Vegard's law as shown in Fig. 2 [19]. The X-ray density D x of all the 6.0225 × 1023 atom/mol).…”