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<p>Ni<sub>0.8</sub>Zn<sub>0.2</sub>Co<sub>x</sub>Fe<sub>2-x</sub>O<sub>4</sub> (x = 0.02, 0.04, 0.06, 0.08) ferrite materials were prepared using traditional ball milling process. The crystal structure, microstructure, and magnetic properties of the samples were systematically characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), physical Property Measurement System (PPMS) and magnetic flux density-magnetic field analyzer. The results show that with the increase of Co substitution, lattice defects intensify, abnormal grain growth occurs. When x = 0.02 and 0.04, the relative magnetic loss and the relative loss coefficient of the sample both decrease first and then remain stable with the increase of frequency (f). This new type of magnetic loss characteristic deviates from the classical loss separation theory. Physical mechanism analysis shows that after Co substitution, the eddy current loss coefficient is very small, and the hysteresis loss coefficient decreases with increasing frequency, optimizing the high-frequency magnetic loss performance of soft ferrite.</p>

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Structure, magnetism, and novel high-frequency loss characteristics of Ni0.8Zn0.2CoxFe2-xO4 (x = 0.02, 0.04, 0.06, 0.08) ferrite

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • F. Z. Lin,
  • X. D. Bao,
  • J. L. Ni

摘要

Ni0.8Zn0.2CoxFe2-xO4 (x = 0.02, 0.04, 0.06, 0.08) ferrite materials were prepared using traditional ball milling process. The crystal structure, microstructure, and magnetic properties of the samples were systematically characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), physical Property Measurement System (PPMS) and magnetic flux density-magnetic field analyzer. The results show that with the increase of Co substitution, lattice defects intensify, abnormal grain growth occurs. When x = 0.02 and 0.04, the relative magnetic loss and the relative loss coefficient of the sample both decrease first and then remain stable with the increase of frequency (f). This new type of magnetic loss characteristic deviates from the classical loss separation theory. Physical mechanism analysis shows that after Co substitution, the eddy current loss coefficient is very small, and the hysteresis loss coefficient decreases with increasing frequency, optimizing the high-frequency magnetic loss performance of soft ferrite.