A truncated-pyramid ultra-wideband electromagnetic absorbing metamaterial based on superparamagnetic composite materials

Guijiang Liu; Xingbao Lyu; Yiqun Ma; Chengxun Yuan; Zhongxiang Zhou; Kudryavtsev Anatoly

doi:10.1088/1402-4896/ae298c

A truncated-pyramid ultra-wideband electromagnetic absorbing metamaterial based on superparamagnetic composite materials

Guijiang Liu
, Xingbao Lyu^*
, Yiqun Ma
, Chengxun Yuan
, Zhongxiang Zhou
, Kudryavtsev Anatoly

^*Corresponding author for this work

School of Physics, Harbin Institute of Technology
Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Superparamagnetic materials break the Snoek’s limit of ferromagnetic materials, offering significant potential for the design and development of broadband microwave-absorbing metamaterials. This study presents the design and fabrication of a novel metamaterial with a periodic truncated pyramid structure, based on superparamagnetic Fe₃O₄ nanoparticles/hollow glass microspheres/epoxy resin composite (Fe₃O₄NP/HGS/EP). By optimizing the fabrication process and geometric structure, the proposed material achieves effective ultra-wideband electromagnetic wave absorption across the entire C-band and X-band, with an absorption rate exceeding 90%. Experimental validation confirms the exceptional electromagnetic absorption performance of the composite material, which is primarily attributed to the synergistic effects of superparamagnetic relaxation, multiple electromagnetic loss mechanisms, and the significantly improved impedance matching enabled by the gradient structure.

Original language	English
Article number	125547
Journal	Physica Scripta
Volume	100
Issue number	12
DOIs	https://doi.org/10.1088/1402-4896/ae298c
State	Published - 1 Dec 2025
Externally published	Yes

Keywords

metamaterial
microwave absorption
snoek limit
superparamagnetic

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10.1088/1402-4896/ae298c

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abstract = "Superparamagnetic materials break the Snoek{\textquoteright}s limit of ferromagnetic materials, offering significant potential for the design and development of broadband microwave-absorbing metamaterials. This study presents the design and fabrication of a novel metamaterial with a periodic truncated pyramid structure, based on superparamagnetic Fe3O4 nanoparticles/hollow glass microspheres/epoxy resin composite (Fe3O4NP/HGS/EP). By optimizing the fabrication process and geometric structure, the proposed material achieves effective ultra-wideband electromagnetic wave absorption across the entire C-band and X-band, with an absorption rate exceeding 90\%. Experimental validation confirms the exceptional electromagnetic absorption performance of the composite material, which is primarily attributed to the synergistic effects of superparamagnetic relaxation, multiple electromagnetic loss mechanisms, and the significantly improved impedance matching enabled by the gradient structure.",

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AU - Liu, Guijiang

AU - Lyu, Xingbao

AU - Ma, Yiqun

AU - Yuan, Chengxun

AU - Zhou, Zhongxiang

AU - Anatoly, Kudryavtsev

PY - 2025/12/1

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N2 - Superparamagnetic materials break the Snoek’s limit of ferromagnetic materials, offering significant potential for the design and development of broadband microwave-absorbing metamaterials. This study presents the design and fabrication of a novel metamaterial with a periodic truncated pyramid structure, based on superparamagnetic Fe3O4 nanoparticles/hollow glass microspheres/epoxy resin composite (Fe3O4NP/HGS/EP). By optimizing the fabrication process and geometric structure, the proposed material achieves effective ultra-wideband electromagnetic wave absorption across the entire C-band and X-band, with an absorption rate exceeding 90%. Experimental validation confirms the exceptional electromagnetic absorption performance of the composite material, which is primarily attributed to the synergistic effects of superparamagnetic relaxation, multiple electromagnetic loss mechanisms, and the significantly improved impedance matching enabled by the gradient structure.

AB - Superparamagnetic materials break the Snoek’s limit of ferromagnetic materials, offering significant potential for the design and development of broadband microwave-absorbing metamaterials. This study presents the design and fabrication of a novel metamaterial with a periodic truncated pyramid structure, based on superparamagnetic Fe3O4 nanoparticles/hollow glass microspheres/epoxy resin composite (Fe3O4NP/HGS/EP). By optimizing the fabrication process and geometric structure, the proposed material achieves effective ultra-wideband electromagnetic wave absorption across the entire C-band and X-band, with an absorption rate exceeding 90%. Experimental validation confirms the exceptional electromagnetic absorption performance of the composite material, which is primarily attributed to the synergistic effects of superparamagnetic relaxation, multiple electromagnetic loss mechanisms, and the significantly improved impedance matching enabled by the gradient structure.

KW - metamaterial

KW - microwave absorption

KW - snoek limit

KW - superparamagnetic

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A truncated-pyramid ultra-wideband electromagnetic absorbing metamaterial based on superparamagnetic composite materials

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Keywords

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