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<p>The development of high-performance, miniaturized microwave devices necessitates ferrite materials exhibiting both high saturation magnetization (4πMs) and a narrow ferromagnetic resonance linewidth (ΔH). This study investigates the influence of Cd<sup>2+</sup> substitution on the phase evolution, microstructure, and microwave properties of Ni<sub>0.47</sub>Zn<sub>0.45−x</sub>Cd<sub>x</sub>Cu<sub>0.08</sub>Fe<sub>2</sub>O<sub>4</sub> (x = 0.00–0.10) ferrites synthesized via a solid-state reaction method. The results demonstrate that an appropriate amount of Cd<sup>2+</sup> ions substitution significantly promotes densification while concurrently enhancing the material’s dielectric and microwave gyromagnetic characteristics. Notably, the composition with x = 0.06 demonstrates a superior combination of properties, including low porosity (1.25%), high saturation magnetization (4737.71 Gs), and a narrow ferromagnetic resonance (FMR) linewidth (ΔH) (242.81 Oe), alongside favorable dielectric (ε' = 15.5, tanδ<sub>ε</sub> = 0.004) and magnetic (μ' = 108.4, tanδ<sub>μ</sub> = 0.065) properties. This work establishes Cd<sup>2+</sup> substitution as an effective strategy for tailoring the gyromagnetic properties of NiCuZn ferrites for advanced microwave applications.</p>

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Synthesis of high saturation magnetization and narrow linewidth Cd2+-doping NiCuZn ferrite for microwave devices application

  • 期刊论文

  • 发表日期：

    2025年9月22日

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  • Zhu Xinyi,
  • Li Jie,
  • Xiao Yang,
  • Yang Yan,
  • Yuan Jingyu,
  • Wang Siyuan,
  • Yuan Shangxun,
  • Zou Jinliang,
  • Yan Yichao

摘要

The development of high-performance, miniaturized microwave devices necessitates ferrite materials exhibiting both high saturation magnetization (4πMs) and a narrow ferromagnetic resonance linewidth (ΔH). This study investigates the influence of Cd2+ substitution on the phase evolution, microstructure, and microwave properties of Ni0.47Zn0.45−xCdxCu0.08Fe2O4 (x = 0.00–0.10) ferrites synthesized via a solid-state reaction method. The results demonstrate that an appropriate amount of Cd2+ ions substitution significantly promotes densification while concurrently enhancing the material’s dielectric and microwave gyromagnetic characteristics. Notably, the composition with x = 0.06 demonstrates a superior combination of properties, including low porosity (1.25%), high saturation magnetization (4737.71 Gs), and a narrow ferromagnetic resonance (FMR) linewidth (ΔH) (242.81 Oe), alongside favorable dielectric (ε' = 15.5, tanδε = 0.004) and magnetic (μ' = 108.4, tanδμ = 0.065) properties. This work establishes Cd2+ substitution as an effective strategy for tailoring the gyromagnetic properties of NiCuZn ferrites for advanced microwave applications.