Effect of chromium ions on the structural, magnetic, and optical properties of manganese–zinc ferrite nanoparticles

Abstract

The present work describes the synthesis of Mn 0.5 Zn 0.5 Cr x Fe 2−x O 4 (x = 0.1, 0.2, 0.3) ferrite nanoparticles by solution combustion method and their detailed structural, electrical, magnetic, and optical characterizations. X-ray pattern represents the creation of a single spinel structure. In addition to this, the distribution of cations is also approximated from X-ray study which is then authenticated by the magnetization technique also. The crystalline size (23-21 nm) and lattice parameter (8.39-8.30 Å) are found to shrink with the rise in chromium ions. A decrease in saturation magnetization (0.80-0.64 emu/g) and remanent magnetization (0.05-0.03 emu/g) is found with the rise in chromium ions, while the coercivity is found to increase (83-123 Oe) through the adding of chromium ions. FTIR predicted the two absorption bands (ν 1 and ν 2) near 600 and 400 cm −1. Dielectric constant and loss tangent were observed to decrease with an increase in frequency, whereas AC conductivity attains a nearly constant value at a lower frequency and observed to increase at higher frequencies with the addition of dopant.

Green synthesis of biocompatible Fe 3 O 4 magnetic nanoparticles using Citrus Sinensis peels extract for their biological activities and magnetic- hyperthermia applications

“…So, the Bragg interplanar distance of the crystal and is estimated from diffraction equation ( 4), 2dsin 𝜃=nλ………………. (4) and the density theoretical was computed from equation ( 5) 43,36 𝐷 𝑥 = 𝑍𝑀 𝑁𝑉 ………………… (5) where N is Avogadro's number, Z is the molecules per unit cell number, M is the molecular weight, and V is the unit cell volume (V = a 3 ) in cubic symmetry case. From the Scherrer's equation ( 6) can be calculate the nanocrystallite diameter (D) because all of the diffraction profiles exhibit broad profile distribution as a result of X-ray scattering from small nanocrystals:…”

Green synthesis of biocompatible Fe3O4 magnetic nanoparticles using Citrus Sinensis peels extract for their biological activities and magnetic-hyperthermia applications

“…The observed peak amplitude corresponds to the small particle size 56 , and the density theoretical was computed from Eq. ( 5 ) 45 , 57 : where Z is the molecules per unit cell number, N is Avogadro’s number, V is the unit cell volume (V = a 3 ) in a cubic symmetry case, and M is the molecular weight. From Scherrer's Eq.…”

Applications of Multiferroics

“…The solution combustion technique is a form of self-propagating high-temperature synthesis technique, or simply combustion technique [43]. A. G. Merzhano introduced the self-propagating high-temperature synthesis technique idea.…”