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<p>A self-combustion synthesis followed by sonication was used to prepare Ni<sub>0.8</sub>Cu<sub>0.2</sub>Fe<sub>1.9</sub>Ce<sub>0.1</sub>O<sub>4</sub> (NCFC)/Graphene Oxide (GO) nanocomposites, and their structural, vibrational, morphological, dielectric, and magnetic properties were examined. The crystallite size ranged from 37.05&#xa0;nm to 32.98&#xa0;nm with GO addition. Raman spectroscopy confirmed the spinel ferrite phase and GO functional groups. Micrographs revealed nanoscale morphology with uniform GO distribution. The dielectric response revealed that the increasing GO (0wt.%, 5wt.%, 10wt.%) enhanced the dielectric constant. Moreover, pure NCFC SFs exhibit the highest Q factor at above 1 kHz frequency, and the NCFC/GO nanocomposites (5wt.% and 10wt.% GO) show lower Q factors as compared to the NCFC sample at above 1 kHz frequency. Coercivity (H<sub>C</sub>) increased from 48.52 Oe to 76.53 Oe, while saturation magnetization (M<sub>S</sub>) decreased from 99.69 emu.g⁻<sup>1</sup> to 74.75 emu.g⁻<sup>1</sup>. The squareness ratio (SQ) increased from 0.147 to 0.194. The microwave operating frequency (ωₘ) decreased from 22.03 × 10⁹ Hz to 19.22 × 10⁹ Hz. These results highlight the multifunctional nature of NCFC/GO nanocomposites for advanced applications. </p>

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Magnetically and dielectrically modified Ni0.8Cu0.2Fe1.9Ce0.1O4/Graphene oxide nanocomposites

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Z. Ahmad,
  • M. T. Ansar,
  • Adel Qlayel Alkhedaide,
  • Salah M. El-Bahy,
  • Hamdy Khamees Thabet,
  • A. U. Rahman,
  • Q. Hussain

摘要

A self-combustion synthesis followed by sonication was used to prepare Ni0.8Cu0.2Fe1.9Ce0.1O4 (NCFC)/Graphene Oxide (GO) nanocomposites, and their structural, vibrational, morphological, dielectric, and magnetic properties were examined. The crystallite size ranged from 37.05 nm to 32.98 nm with GO addition. Raman spectroscopy confirmed the spinel ferrite phase and GO functional groups. Micrographs revealed nanoscale morphology with uniform GO distribution. The dielectric response revealed that the increasing GO (0wt.%, 5wt.%, 10wt.%) enhanced the dielectric constant. Moreover, pure NCFC SFs exhibit the highest Q factor at above 1 kHz frequency, and the NCFC/GO nanocomposites (5wt.% and 10wt.% GO) show lower Q factors as compared to the NCFC sample at above 1 kHz frequency. Coercivity (HC) increased from 48.52 Oe to 76.53 Oe, while saturation magnetization (MS) decreased from 99.69 emu.g⁻1 to 74.75 emu.g⁻1. The squareness ratio (SQ) increased from 0.147 to 0.194. The microwave operating frequency (ωₘ) decreased from 22.03 × 10⁹ Hz to 19.22 × 10⁹ Hz. These results highlight the multifunctional nature of NCFC/GO nanocomposites for advanced applications.