Microwave Assisted Synthesis and Characterization of CoxZn1−xCr0.5Fe0.5O4 Nanoparticles

Abstract

Nanoparticles of Co x Zn 1-x FeCrO 4 (x = 0.0-1.0) ferrites have been synthesized by the nitrate citrate microwave assisted route. The structural and magnetic properties were investigated by means of X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, vibrating sample magnetometer. X-ray powder diffraction patterns confirm that the samples possess single phase cubic spinel structure. It was found that by increasing the amount of cobalt loading, the crystallite size increases [20-55 nm with increasing the Co content (x)]. The introduction of Cr 3? ions at octahedral B sites results in the dilution of the magnetization at the B site, which will reduce the saturation magnetization. In the opposite way, replacement of non-magnetic Zn 2? ions with ferromagnetic Co 2? ones increases the saturation magnetization of the samples further.

Mechanical and dielectric properties of cobalt–zinc nanoferrite/nitrile butadiene rubber composites

“…The decreasing behavior may be due to the surface temperature. 29 Higher concentration of Zn 2+ ( x > 0.8) favors the growth of the crystallite size at the nucleation centers, which resulted in higher crystallite size. 30…”

Advancing High‐Performance Mixed Matrix Membrane via Magnetically Aligned Polycrystalline Co0.5Ni0.5FeCrO4 Magnetic Spinel Nanoparticles for Effective H2/CO2 and O2/N2 Gas Separation

“…[ 34 ] Furthermore, the differences in Co 2p sublevels between 1202 and 1205 eV were assigned to the two spin‐orbit peaks of 2p ½ and 2p 3/2 (Figure 2b,d). [ 31,33,34 ] Therefore, the XPS spectrum truly confirmed the valency state of the metal oxides. The TEM SMNPs ( Figure ) analysis showed an average particle size of 82.70 nm (Figure 3a,b).…”

Electromagnetic Properties and Humidity-Sensing Studies of Magnetically Recoverable LaMg x Fe1−x O 3−δ Perovskites Nano-photocatalysts by Sol-Gel Route

“…From the VSM measurements, saturation magnetization (M s ), remanent magnetization (M r ), and coercivity (H c ) values are evaluated and reported in Table 3. LaMg x Fe 1−x O 3−δ nanocrystalline shows a considerable saturation magnetization (M s ) at room temperature and the M s values decreased with the increase Mg content [14][15][16][17]. It may be because the magnetic nature of Fe 3+ (5 μB) ions was replaced by the nonmagnetic nature of [43].…”

“…The substitution of nonmagnetic Mg 2+ ion in LaFeO 3−δ changes their physicochemical and magnetic properties. The magnetic properties of ferrites are affected by composition as well as the type of substitution, cation distribution, and method of preparation [14][15][16][17].…”