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Magnetic Materials: Their Synthesis, Properties and Various Applications

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Materials Science".

Deadline for manuscript submissions: closed (28 February 2024) | Viewed by 432

Special Issue Editor


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Guest Editor
Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-310 Szczecin, Poland
Interests: microcrystals; nanomaterials; single crystals; doped ceramics; rare-earth ions; scheelite-type structure; wolframite-type structure; perovskites; magnetic materials; optical materials; solid solutions; dielectric materials
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Special Issue Information

Dear Colleagues,

Magnetic materials have been widely applied in various areas. Many materials, espescially in form of magnetics nanoparticles (MNPs) have potential for use in a number of biomedical applications as drug localization and magnetic hyperthermia to gene transfection and targeted therapeutics, or as a component of tissue engineering scaffolds or coatings of biomaterials/devices. Many paramagnetic rare-earth metal ions such as e.g., Gd3+ possess a large magnetic moment due to their isotropic electronic ground state. Because of exellent magnetic resonance imaging effect observed for these ions they are used as a common MRI contranst agent. Ferromagnetic particles with large magnetic responce range are suitable for the fabrication of flexible magnetic field sensors used in human health monitoring, electronic skin, and human motion detection.

The chemical composition and the morphological structures created by magnetic materials have a significant impact on their inducible magnetic moment. These nanoparticles can be produced by many methods, from classical chemical, electrochemical, or physical methods to biological syntheses.

Our Special Issue interest is being paid to the molecular synthesis methods and mechanism, molecular structure characterization of new multifunctional molecular magnetic materials.

Dr. Elżbieta Tomaszewicz
Guest Editor

Manuscript Submission Information

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Keywords

  • magnetic nanoparticles MNPs
  • nanoparticles synthesis
  • magnetic properties
  • superparamagnetism
  • molecular magnetism
  • magnetic resonance imaging (MRI)
  • biomedical applications
  • magnetic hyperthermia
  • targeted drug delivery
  • tissue engineering

Published Papers (1 paper)

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Research

19 pages, 1526 KiB  
Article
Effect of Ho3+ Substitution on Magnetic Properties of ZnCr2Se4
by Izabela Jendrzejewska, Tadeusz Groń, Elżbieta Tomaszewicz, Zbigniew Stokłosa, Tomasz Goryczka, Jerzy Goraus, Michał Pilch, Ewa Pietrasik and Beata Witkowska-Kita
Int. J. Mol. Sci. 2024, 25(14), 7918; https://doi.org/10.3390/ijms25147918 - 19 Jul 2024
Viewed by 140
Abstract
A series of ZnCr2−xHoxSe4 microcrystalline spinels (where x = 0.05, 0.075, and 0.10) containing holmium ions in octahedral coordination were obtained by sintering of adequate reactants at high temperatures. The obtained doped materials were characterized by X-ray [...] Read more.
A series of ZnCr2−xHoxSe4 microcrystalline spinels (where x = 0.05, 0.075, and 0.10) containing holmium ions in octahedral coordination were obtained by sintering of adequate reactants at high temperatures. The obtained doped materials were characterized by X-ray diffraction, Scanning Electron Microscopy, UV–Vis–NIR, molecular field approximation, and XPS spectroscopies. Their thermal properties were also investigated. The doping of the ZnCr2S4 matrix with paramagnetic Ho3+ ions with a content of not more than 0.1 and a screened 4f shell revealed a significant effect of orbital and Landau diamagnetism, a strong reduction in short-range ferromagnetic interactions, and a broadening and shift of the peak of the first critical field by simultaneous stabilization of the sharp peak in the second critical field. These results correlate well with FPLO calculations, which show that Cr sites have magnetic moments of 3.19 µB and Ho sites have significantly larger ones with a value of 3.95 µB. Zn has a negligible magnetic polarization of 0.02 µB, and Se induces a polarization of approximately −0.12 µB. Full article
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