Magnetic Properties and Structural Analysis of Ce‐Doped Mg–Cr Nano‐Ferrites Synthesized Using Auto‐Combustion Technique

Abstract

The spinel sequenced structure is prepared using the sol-gel technique to study the influence of cerium metal onto the structure, magnetic, and morphological properties of MgCr 0.5-x CexFe 1.5 O 4 (x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) ferrites. The formation of a magnesium ferrite phase is confirmed for all prepared samples by using X-ray diffraction, and the structural properties are studied. It is found that the lattice constant increases with the increase in the cerium content, which ranges between (8.35 and 8.45) Å, also found the crystallite size ranges between (8.25 and 17.51) nm. On the other hand, the images of SEM appear existence of agglomeration, distinct nanoparticles of the samples with not uniform distribution of broader grain size. EDX analysis confirms there are no other elements as impurities are detected in synthesized samples. Magnetic measurements by VSM made at room temperature reveal that the magnetization value decreases to x = 0.01 and then increases with the content of Ce 3+ ions. The magnetic nature of the doping samples does not play a major role in determining the final magnetic properties of the compound. Rather, the cation distribution is an important parameter. These properties reveal the super-magnetic nature of the cerium-saturated Mg nanoparticles and may be convenient for catalysts and moisture sensors.

Synthesis and Characterization of (Ni,Co)xMn0.25-xMg0.75Fe2O4 Nanoparticles

“…Figure 2 shows the surface morphology of (Ni,Co)xMn0.25-xMg0.75Fe2O4 nanoparticles as studied by FE-SEM at a scale of 10 μm after annealing at 600 °C. Based on the figure, a nonhomogeneous distribution of the particle size with some agglomeration can be attributed to the fact that the particles were exposed to a permanent magnetic moment that was proportionate to their size [22,23]. During the combustion process, a significant quantity of toxic gas is emitted like oxygen‫و‬ nitrogen, and carbon dioxide, which causes the powders to developing pores, voids, and fractured surfaces, and is often absent from most other synthetic techniques products [24,25].…”

Investigating the Structural and Magnetic Properties of Nickel Oxide Nanoparticles Prepared by Precipitation Method

“…The average crystal size of the samples prepared by the precipitation method of nickel oxide nanoparticles is calculated according to Scherrer equation [21,22]: D= 𝐾𝜆 𝛽𝑐𝑜𝑠𝜃 By adding the term ε = 𝛽 𝑆 𝑡𝑎𝑛𝜃 ,which represents the micro strain to the Scherrer equation, the equation becomes in the following form and is called the Williamson-Hall equation [23,24]:…”

The Gas Sensitivity Properties of Nano Ferrite CuxAl0.3-XNi0.7Fe2O4 Synthesized by Sol-Gel Method

“…More innovative materials are being created for highperformance solid-state gas sensors [8]. The Fe-Fe reactions affect the ferrite's structural, electrical, and magnetic characteristics [9]. Finally, the purpose of this work is to investigate the effect of replacing Al ion with Cu on the structural and sensitivity to H2S gas features of (sol-gel) generated ferrite nanoparticles CuxAl0.3-XNi0.7Fe2O4.…”