Startseite Electrical and magnetic properties of MF/CuAl nanocomposites
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Electrical and magnetic properties of MF/CuAl nanocomposites

  • Khaled Roumaih ORCID logo EMAIL logo
Veröffentlicht/Copyright: 27. November 2023
Zeitschrift für Naturforschung A
Aus der Zeitschrift Zeitschrift für Naturforschung A Band 79 Heft 5

Abstract

This study investigated the effects of CuAl2O4 (CuAl) on four types of spinel ferrites: CoFe2O4 (CoF), NiFe2O4 (NiF), MgFe2O4 (MgF), and ZnFe2O4 (ZnF) with regards to their electrical characteristics and microscopic magnetic behavior. According to the Seebeck coefficient (φ), the nanocomposites have a mixture of positive and negative charge carriers, except for CoF/CuAl, which has a positive charge carrier only. Depending on the temperature, the DC conductivity of all MF/CuAl nanocomposites has a conductor and semiconductor behavior. The dielectric properties were studied at different frequencies (100–10^8 Hz) and temperatures (300–673 K). The results demonstrated how temperature and frequency affect AC operating mechanisms. The high values of dielectric loss for all nanocomposites confirm their applicability in high-frequency microwave devices. The impedance study revealed that the equivalent circuit for all MF/CuAl nanocomposites is a mixture of R, L, and C. Temperature-magnetization graphs were obtained for all nanocomposites, indicating ferrimagnetic behavior except ZnF/CuAl. The magnetic transition temperature (T Cm), the Curie–Weiss constant (θ CW), and the effective magnetic moments (μ eff) for all nanocomposites were determined. The MF/CuAl samples were analyzed using ESR spectroscopy at room temperature. The spectra were distorted but remained distinct, potent, and sweeping. The g-factor values deviate from the free electron, which suggests that the Fe3+–O–Fe3+ superexchange interaction has changed. In addition, the interaction effect between MF and CuAl is discussed.

Keywords: spinel ferrites; multiferroic nanocomposites; ferroelectricity; ferromagnetism; microwave applications
Corresponding author: Khaled Roumaih, Egyptian Atomic Energy Authority, Nuclear Research Center, Reactor Physics Department, Cairo, 13759, Egypt, E-mail:

  1. Research ethics: The author confirms that his work has been approved for publication by their institute.

  2. Author contributions: The author has accepted responsibility for the entire content of this manuscript and approved its submission.

  3. Competing interests: The author declares that he has no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

  4. Research funding: Financing is not available.

  5. Data availability: The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Received: 2023-07-14
Accepted: 2023-10-29
Published Online: 2023-11-27
Published in Print: 2024-05-27

© 2023 Walter de Gruyter GmbH, Berlin/Boston

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  1. Frontmatter
  2. General
  3. Magnetoacoustics and magnetic quantization of Fermi states in relativistic plasmas
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  5. Investigations on the EPR parameters and local structures for the substitutional Ti3+ and W5+ centers in stishovite
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https://doi.org/10.1515/zna-2023-0183
Schlagwörter für diesen Artikel
spinel ferrites; multiferroic nanocomposites; ferroelectricity; ferromagnetism; microwave applications

Artikel in diesem Heft

  1. Frontmatter
  2. General
  3. Magnetoacoustics and magnetic quantization of Fermi states in relativistic plasmas
  4. Atomic, Molecular & Chemical Physics
  5. Investigations on the EPR parameters and local structures for the substitutional Ti3+ and W5+ centers in stishovite
  6. Dynamical Systems & Nonlinear Phenomena
  7. The effects of viscosity on the structure of shock waves in a van der Waals gas
  8. Traveling wavefronts in an anomalous diffusion predator–prey model
  9. Bifurcation and stability analysis of atherosclerosis disease model characterizing the anti-oxidative activity of HDL during short- and long-time evolution
  10. Nuclear Physics
  11. Investigation of 90,92Zr(n,γ)91,93Zr in the s-process nucleosynthesis
  12. Quantum Theory
  13. Quantum-mechanical treatment of two particles in a potential box
  14. Solid State Physics & Materials Science
  15. Unveiling the luminescence property of Pr-incorporated barium cerate perovskites for white LED applications
  16. Electrical and magnetic properties of MF/CuAl nanocomposites
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Heruntergeladen am 10.10.2025 von https://www.degruyterbrill.com/document/doi/10.1515/zna-2023-0183/html
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