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<p>As key materials in electronic devices, soft magnetic composites(SMCs)are required to exhibit both high permeability and low core loss under high-frequency conditions in order to meet the demands of modern electronics toward high frequency and miniaturization. In this work, SMCs featuring FeNiMo cores encapsulated by a magnetic Ni₀.₆Zn₀.₄Fe₂O₄ layer were designed and fabricated to enhance magnetic performance, and the dependence of magnetic properties on Ni₀.₆Zn₀.₄Fe₂O₄ content was systematically investigated. The composite with 4 wt% Ni₀.₆Zn₀.₄Fe₂O₄ demonstrates the optimal comprehensive electromagnetic performance. It delivers a minimum core loss of 63.34&#xa0;W/kg at 0.05 T and 10&#xa0;kHz, accompanied by the highest equivalent permeability (23.69) and electrical resistivity among all samples. Furthermore, a finite element-based microstructural model was developed in Ansys Maxwell to evaluate current density distribution and magnetic loss under an applied magnetic field. The simulations demonstrate a more uniform magnetic flux distribution and suppressed eddy current effects at the optimal composition. The good agreement with experimental results provides simulation-assisted interpretation and further clarifies the magnetic loss mechanisms, confirming the excellent low-loss performance under alternating magnetic field conditions.</p>

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Magnetic Properties Evaluation and Loss Simulation of FeNiMo/Ni₀.₆Zn₀.₄Fe₂O₄ Soft Magnetic Composites

  • 期刊论文

  • 发表日期：

    2026年7月29日

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  • Shen Wu,
  • Jinliang Song,
  • Xiaoran Sun,
  • Haoyu Zhu,
  • Jianglei Fan,
  • Yaju Zhou

摘要

As key materials in electronic devices, soft magnetic composites(SMCs)are required to exhibit both high permeability and low core loss under high-frequency conditions in order to meet the demands of modern electronics toward high frequency and miniaturization. In this work, SMCs featuring FeNiMo cores encapsulated by a magnetic Ni₀.₆Zn₀.₄Fe₂O₄ layer were designed and fabricated to enhance magnetic performance, and the dependence of magnetic properties on Ni₀.₆Zn₀.₄Fe₂O₄ content was systematically investigated. The composite with 4 wt% Ni₀.₆Zn₀.₄Fe₂O₄ demonstrates the optimal comprehensive electromagnetic performance. It delivers a minimum core loss of 63.34 W/kg at 0.05 T and 10 kHz, accompanied by the highest equivalent permeability (23.69) and electrical resistivity among all samples. Furthermore, a finite element-based microstructural model was developed in Ansys Maxwell to evaluate current density distribution and magnetic loss under an applied magnetic field. The simulations demonstrate a more uniform magnetic flux distribution and suppressed eddy current effects at the optimal composition. The good agreement with experimental results provides simulation-assisted interpretation and further clarifies the magnetic loss mechanisms, confirming the excellent low-loss performance under alternating magnetic field conditions.