Advanced Nanomagnetic Materials and Its Applications

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Chemistry: Symmetry/Asymmetry".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 1884

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Physical Chemistry Department, Advanced Materials Technology and Mineral Resources Research Institute, National Research Centre, 33 El Bohouth St. (Former El Tahrir St.), Dokki, Giza P.O. 12622, Egypt
Interests: metal oxides; spinel and perovskite nanomaterials; advanced nanomagnetic materials; nanostructured materials and their applications
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Special Issue Information

Dear Colleagues,

Recently, when considering climate change, the strong need for multiple energy sources, and the requirement for digital transformation, an increased need has arisen to improve and develop new materials to make them renewable and advanced at the same time. Therefore, there is a need for advanced nanomagnetic materials because of their unique properties that lead to their participation in emerging technologies, such as climate-friendly electric vehicles, wind energy, data storage, and the high performance of supercapacitors.

Increased understanding of the symmetry and dynamics of magnetization based on fabrication, design, and characterization is resulting in a greater expansion of the applications of conventional nanomagnetic materials. On other hand, the development of nanotechnology provides opportunities to characterize, manipulate, and organize matter systematically at the nanometer scale, which shows the unprecedented potential of magnetic materials for various applications, including in biotechnology, sensor devices, energy harvesting, and power generating systems.

This Special Issue provides a cogent overview of the manufacture, design, characterization and applications of advanced nanomagnetic materials, including spintronic nanomagnets, molecular nanomagnets, self-assembling magnetic nanomaterials, magnetic-nanoparticle-based supercapacitors, multifunctional materials, and heterojunction-induced novel magnetism.

It is my pleasure to invite you to submit an original manuscript for this Special Issue in Symmetry. Full papers, communications, and reviews are all welcome.

Prof. Dr. Nasrallah Mohamed Mahmoud Deraz
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • fabrication, design, and characterization of novel magnetic materials
  • symmetry in advanced nanomagnetic materials
  • magnetic nanostructured materials
  • magnetic-nanoparticle-based supercapacitors
  • applications of advanced nanomagnetic materials

Published Papers (2 papers)

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Research

14 pages, 3642 KiB  
Article
Effects of Zinc Substitution on the Microstructural and Magnetic Characteristics of Cubic Symmetry Nickel Ferrite System
by Omar H. Abd-Elkader, Nasrallah M. Deraz and Lotfi Aleya
Symmetry 2023, 15(5), 975; https://doi.org/10.3390/sym15050975 - 24 Apr 2023
Cited by 3 | Viewed by 1479
Abstract
The preparation of ZnxNi1−xFe2O4 (x = 0 and 0.3) nanoparticles using glycine-mediated combustion route was successfully completed depending on the zwitterion and combustion characteristics of glycine. Using a variety of methods, including XRD, FTIR, SEM/EDX, and [...] Read more.
The preparation of ZnxNi1−xFe2O4 (x = 0 and 0.3) nanoparticles using glycine-mediated combustion route was successfully completed depending on the zwitterion and combustion characteristics of glycine. Using a variety of methods, including XRD, FTIR, SEM/EDX, and TEM, the investigated ferrites were characterized. XRD and FTIR analyses confirm that Zn0.3Ni0.7Fe2O4 and NiFe2O4 nanoparticles crystallize in the cubic symmetry in the space group Fd3m. An increase in the lattice parameters and a subsequent decrease in crystallite size were caused by the process of replacing Ni ions with Zn ions. In accordance with Waldron’s hypothesis, FTIR spectra demonstrate that the ferrites have a spinel-type structure as they are produced. The substitution process by Zn led to different changes in the half band widths with subsequent in splitting in the absorption band around 400 cm−1. The examined ferrites’ cation distribution showed that Zn2+ and Ni2+ ions favored the tetrahedral (A) and octahedral (B) sites, respectively, while Fe3+ ions occupied both A- and B-sites, providing mixed spinel ferrite. TEM analysis indicates the formation of spinel nanocrystalline particles with low agglomerations. The particle size of the as-synthesized ferrites did not exceed 16 nm. By applying the VSM approach at room temperature, the magnetic characteristics of the ferrites under investigation were established. The magnetization of Zn0.3Ni0.7Fe2O4 nanoparticles was found to be higher than that of NiFe2O4 nanoparticles according to the magnetic data. Increasing the magnetization and the experimental magnetic moment of Zn0.3Ni0.7Fe2O4 were accompanied by a decreasing of its coercivity. The net magnetization is oriented along different high symmetry directions. On the other hand, the anisotropy of the nickel ferrite increases by substituting Ni with a Zn ion. Full article
(This article belongs to the Special Issue Advanced Nanomagnetic Materials and Its Applications)
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16 pages, 7261 KiB  
Article
Corchorus Olitorius-Mediated Green Synthesis and Characterization of Nickel and Manganese Ferrite Nanoparticles
by Omar H. Abd-Elkader, Nasrallah M. Deraz and Lotfi Aleya
Symmetry 2023, 15(5), 965; https://doi.org/10.3390/sym15050965 - 23 Apr 2023
Cited by 3 | Viewed by 1434
Abstract
Developing a method for preparing Ni and Mn ferrites was the main objective of this study due to the importance of these materials in high-frequency applications. These ferrites were made by assisting combustion with dried leaves of Corchorus olitorius and then heating them [...] Read more.
Developing a method for preparing Ni and Mn ferrites was the main objective of this study due to the importance of these materials in high-frequency applications. These ferrites were made by assisting combustion with dried leaves of Corchorus olitorius and then heating them to 700 °C. Several methods, including FTIR, XRD, TEM, and SEM/EDX, were used to characterize these ferrites. The thermal behavior, surface and magnetic properties of the as-prepared materials were determined. The results revealed that the method used is cheap, economical, environmentally friendly and makes it easy to produce the studied ferrites. FTIR, XRD, TEM, and SEM/EDX analyses show the formation of nanocrystalline ferrites with brittle, spongy and spinel-type structures, having two main vibration bands located around 400 cm−1 and 600 cm−1. However, TG-DTG results display the thermal behavior of different materials which consisted of unreacted oxides, carbon and the corresponding ferrites in the range of 300 °C to 600 °C. Moreover, complete conversion of the unreacted oxides to the equivalent ferrite was achieved by increasing heat treatment from 600 °C to 1000 °C. Ferrites are heated at 700 °C, which reduces their surface area. The magnetic properties of different ferrites calcined at 700 °C were estimated using the VSM technique. The magnetism of Fe-based materials containing Ni and Mn is 12.189 emu/g and 25.988 emu/g, respectively. Moreover, the squareness and coercivity of Ni ferrite are greater than for Mn ferrite. Full article
(This article belongs to the Special Issue Advanced Nanomagnetic Materials and Its Applications)
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