Exploring the impact of nickel doping on the structure and low-temperature magnetic features of cobalt nano-spinel ferrite

Abstract

Tailoring the magnetic features of cobalt ferrite nanoparticles (NPs) has been achieved via varying the doping percent of nickel. The nickel-substituted cobalt ferrite NPs NixCo1-xFe2O4 (0 ≤ x ≤ 1.0) are constructed by the eco-friendly coprecipitation method. The formation of a nearly cubic single-phase spinel frame is assured by the analysis of XRD data. Moreover, the Rietveld analysis based on structure refinement is implemented in this study to precisely determine the microstructural parameters and estimate the cation distribution. A linear drop-in lattice constant with boosting the Ni2+ ion percent is acclaimed, in regard to Vegard's law. The creation of nanoparticles that are nearly spherical along with polyhedron shape and have a diameter of (about 39–45 nm) has been affirmed by utilizing high-resolution transmission electron microscopy (HRTEM). Also, the crystalline essence of the formed nanoparticles has been declared by selective area electron diffraction (SAED). The magnetic properties have been collected from the hysteresis loops and FC–ZFC curves. These curves have been tweaked as a function of low-temperature from 5 K up to 300 K and in the existence of an external magnetic field (± 70KOe). The magnetization curves revealed that CoFe2O4 (NPs) correspond to the hard ferrimagnetic material, whereas NiFe2O4 (NPs) matched well with identical soft ferrimagnetic material. Also, the divergence betwixt the theoretical and experimental values of the magnetic moment is well explained by the model of "Random Canting of Spins, (RCS)". In addition, a remarkable reduction is found in the recorded values of magnetic parameters by increasing Ni2+ content and decreasing the temperature towards 5 K. These findings imply the potential of Ni2+ ions doping in enhancing the magnetic properties of cobalt ferrite for vast magnetic applications.

Investigation of Static Shear Stress in a Suspension of Co0.2Ni0.8Fe2O4 Nanoparticles in Sesame Oil

“…The lattice constant (𝑎) value is in between that for Ni ferrite and Co ferrite [26]. The XRD density is in agreement with the other studies [27], and it is considered a high density due to the suitable preparation conditions that were chosen.…”

Dielectric, conductivity properties, elastic moduli, and gamma-ray attenuation abilities: A wide-ranging investigation into Molybdenum added ferrite nanoparticles

“…While the morphology of the prepared sample (x = 0.15) was studied using SEM (Quanta 250 FEG), as shown in figure 2(c). The SEM micrograph illustrates a sufficiently homogenous dispersion of the synthesized particles as well as the presence of single-phase cultivation [1,22].…”

“…Nano ferrites have gained a lot of scientific heed in recent years due to their distinctive structural properties, vast surface area as a single magnetic domain, and their potential application in magnetic high-density memory devices, electronic devices, computer chips, gas sensors, noise filters, hydrothermal and water purification [1][2][3], radiation shielding and optoelectronic properties [4,5]. Many approaches have been utilized to fabricate nanoparticles ferrite such as sono-chemical [6], co-precipitation [7], hydrothermal [8], spray pyrolysis [9], and auto-combustion reaction [10,11].…”