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<p>High-entropy design is attracting growing interest as it offers unique structures and unprecedented application potential for materials. In this article, a novel high-entropy ferrite (CoNi)<sub><i>x</i>/2</sub>(CuZnAl)<sub>(1−<i>x</i>)/3</sub>Fe<sub>2</sub>O<sub>4</sub> (<i>x</i> = 0.25, 0.34, 0.40, 0.50) with a single spinel phase of space group <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12613_2024_2883_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(Fd\bar{3}m\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mi>F</mi> <mi>d</mi> <mrow> <mover> <mn>3</mn> <mo stretchy="false">¯</mo> </mover> </mrow> <mi>m</mi> </math></EquationSource> </InlineEquation> was successfully developed by the solid-state reaction method. By tuning the Co–Ni content, the magnetic properties of the material, especially the coercivity, changed regularly, and the microwave absorption properties were improved. In particular, the effective absorption bandwidth of the material increased from 4.8 to 7.2 GHz, and the matched thickness decreased from 3.9 to 2.3 mm, while the minimum reflection loss remained below −20 dB. This study provides a practical method for modifying the properties of ferrites used to absorb electromagnetic waves.</p>

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High-entropy ferrite with tunable magnetic properties for excellent microwave absorption

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Yuying Huo,
  • Zhengyan Wang,
  • Yanlan Zhang,
  • Yongzhen Wang

摘要

High-entropy design is attracting growing interest as it offers unique structures and unprecedented application potential for materials. In this article, a novel high-entropy ferrite (CoNi)x/2(CuZnAl)(1−x)/3Fe2O4 (x = 0.25, 0.34, 0.40, 0.50) with a single spinel phase of space group \(Fd\bar{3}m\) F d 3 ¯ m was successfully developed by the solid-state reaction method. By tuning the Co–Ni content, the magnetic properties of the material, especially the coercivity, changed regularly, and the microwave absorption properties were improved. In particular, the effective absorption bandwidth of the material increased from 4.8 to 7.2 GHz, and the matched thickness decreased from 3.9 to 2.3 mm, while the minimum reflection loss remained below −20 dB. This study provides a practical method for modifying the properties of ferrites used to absorb electromagnetic waves.