Cr3+ substitution influence on structural, magnetic and electrical properties of the Ni0.3Zn0.5Co0.2Fe2-xCrxO4 (0.00 ≤ x ≤ 0.20) nanosized spinel ferrites

Abstract

• The sol-gel auto combustion method prepared the Cr 3+ substitution in Ni 0.3 Zn 0.5 Co 0.2 Fe 2-x Cr x O 4 (0.00 ≤ x ≤ 0.20) ferrite nanoparticles. • The measured lattice constant and crystallite size from XRD data show a single-phase cubic spinel. • FESEM images indicate the particles are of small size are confirmed. • There were two absorption peaks around 577.43 cm −1 and around 392.46 cm −1 in the FTIR spectra supporting their spinel structure, as is indicated by the XRD pattern. • The magnetic saturation decreased from 110.87 to 70.28 emu/g with the Cr 3+ ions substitution. • The BB interaction is prominent over the AB interaction, and the DC electricity measurement shows their highly resistive nature. The sol-gel auto combustion method was used for the preparation of the Cr 3+ substitution in Ni 0.3 Zn 0.5 Co 0.2 Fe 2-x Cr x O 4 (0.00 ≤ x ≤ 0.20) ferrite nanoparticles. The XRD data show a cubic spinel structure with a single phase of the samples. The crystallite size of nanoparticles was found to be in the range of 36.74–25.91 nm. Lattice parameter decreases with Cr 3+ concentration increases. SEM micrographs of the nanocrystalline ferrites show an increasing trend in average grain size. There were two absorption peaks around 577.43 cm −1 and around 392.46 cm −1 in the FTIR spectra supporting their spinel structure, as is indicated by the XRD pattern. The magnetic measurements show that the saturation magnetization and coercivity decreases as concentration increases.. The sample with x = 0.00 has a maximum saturation magnetization of 110.87 emu/g. Interlattice interactions are peculiar for tetrahedral and octahedral coordination, and dc electricity measurements reveal their highly resistant character.