Structure, Morphology and Electrical/Magnetic Properties of Ni-Mg Nano-Ferrites from a New Perspective

Abstract

Using the auto combustion flash method, Ni1−x+2Mgx+2Fe2+3O4 (x = 0, 0.2, 0.6, 0.8 and 1) nano-ferrites were synthesized. All samples were thermally treated at 973 K for 3 h. The structural analysis for the synthesized samples was performed using XRD, high-resolution transmission electron microscopy (HRTEM), and FTIR. Scanning electron microscopy (SEM) was undertaken to explore the surface morphology of all the samples. The thermal stability of these samples was investigated using thermogravimetric analysis (TGA). XRD data show the presence of a single spinel phase for all the prepared samples. The intensity of the principal peak of the spinel phase decreases as Mg content increases, showing that Mg delays crystallinity. The Mg content raised the average grain size (D) from 0.084 μm to 0.1365 μm. TGA shows two stages of weight loss variation. The vibrating sample magnetometer (VSM) measurement shows that magnetic parameters, such as initial permeability (μi) and saturation magnetization (Ms), decay with rising Mg content. The permeability and magnetic anisotropy at different frequencies and temperatures were studied to show the samples’ magnetic behavior and determine the Curie temperature (TC), which depends on the internal structure. The electrical resistivity behavior shows the semi-conductivity trend of the samples. Finally, the dielectric constant increases sharply at high temperatures, explained by the increased mobility of charge carriers, and decreases with increasing frequency.

Ultrasound Allied Laser Sono-Photobiomodulation Activated Nano-Curcumin: Up-and-Coming Selective Cancer Cell Killing Modality

“…The present work indicated that P21, P16, p53, and TGFβ-1 gene expressions using RT-PCR a good predictor of cancer treatment and inhibition of angiogenesis and was inconsistent with other studies done by other authors [47][48][49][50][51][52][53][54][55]. In the end, the application of photo-and sono-activated phytochemical nanoparticle (nano-curcumin) as in vivo anti-tumor therapy opens up a new way of research in cancer treatment.…”

Combined Effect of Microstructure, Surface Energy, and Adhesion Force on the Friction of PVA/Ferrite Spinel Nanocomposites

“…To detail these contributions, it is necessary to use an X-ray diffractometer with an ultrahigh resolution, which is not always available. Nevertheless, in the present work, Formulas (5)- (10) for the relationship between structural parameters that are often used in practice were used. Some examples are the works [76][77][78] and the papers cited herein.…”

“…Ferrites are essential for many recent technological designs of electrical, magnetic, and microwave devices [5][6][7]. The properties of ferrites are influenced by the method of synthesis, the composition, the microstructure features, and the distribution of cations in the tetrahedral and octahedral sites in the lattice of the ferrite [8][9][10]. The distribution of equilibrium between the spinel structure cations depends on ionic, electronic, and polarizing effects [11][12][13][14].…”

One-Pot Formation of an rGO-Based ZnAl2O4 Nanocomposite for Electrochemical Studies toward Oxygen Evolution Reactions

“…H 2 O electrolysis, as a commercially viable technology, possesses significant potential for expansion in the industrial sector. − The electrochemical cell employed in H 2 O splitting contains the oxygen evolution reaction (OER) occurring at the negative electrode and the hydrogen evolution reaction (HER) taking place at the positive electrode. − Theoretical conditions for the splitting of H 2 O are commonly expressed as 1.23 V. However, electrolytic devices employed in commercial applications often operate at 0.8 eV, which has raised significant concerns. − To enhance the pace of the reaction, it is important to devise an ideal electrocatalyst capable of reducing the excessive potential associated with both of the above processes. Until recently, it was commonly held that the most effective catalysts for the electrocatalytic process of the OER were expensive metal such as Ru and Ir oxides, as well as those for the HER being Pt oxides. − …”