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Sun et al. Soft Sci. 2025, 5, 35 Soft Science
DOI: 10.20517/ss.2025.21

Research Article Open Access

Dielectric shell regulation in synergy FeCoNi@ZnIn S
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microspheres with broadband electromagnetic wave
absorption

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Rui Sun , Huwei Lv , Gangjie Lian , Lei Wang , Mengqiu Huang , Wenbin You , Renchao Che 1,2,4,*
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School of Physics and Materials Science, Nanchang University, Nanchang 330031, Jiangxi, China.
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International Institute for Materials Innovation, Nanchang University, Nanchang 330031, Jiangxi, China.
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School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
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Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of
Coatings for Advanced Equipment, College of Smart Materials and Future Energy, Fudan University, Shanghai 200438, China.
* Correspondence to: Prof. Renchao Che, School of Physics and Materials Science, Nanchang University, No. 999 Xuefu Road,
Honggutan District, Nanchang 330031, Jiangxi, China. E-mail: rcche@fudan.edu.cn; Dr. Lei Wang, School of Materials Science
and Engineering, Tongji University, No. 4800 Caoan Road, Jiading District, Shanghai 201804, China. E-mail:
lei_wang@tongji.edu.cn
How to cite this article: Sun, R.; Lv, H.; Lian, G.; Wang, L.; Huang, M.; You, W.; Che, R. Dielectric shell regulation in synergy
FeCoNi@ZnIn S microspheres with broadband electromagnetic wave absorption. Soft Sci. 2025, 5, 35. https://dx.doi.org/10.
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20517/ss.2025.21
Received: 28 May 2025 First Decision: 13 Jun 2025 Revised: 8 Jul 2025 Accepted: 10 Jul 2025 Published: 18 Jul 2025
Academic Editor: Guanglei Wu Copy Editor: Pei-Yun Wang Production Editor: Pei-Yun Wang

Abstract
Core-shell structure and magnetic-dielectric coupling in functional composites are important factors for obtaining
excellent electromagnetic (EM) wave absorption performance, but they also face challenges. In this study,
magnetic FeCoNi and dielectric ZnIn S were combined to form unique core-shell structured microspheres. The
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morphology characteristics, EM parameters, and absorption performance of FeCoNi@ZnIn S composites with
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different annealing temperatures were investigated to reveal impedance matching and synergistic absorption
mechanisms. Those results show that FeCoNi@ZnIn S -600 (FCNZ-600) has excellent EM wave absorption
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properties, with the minimum reflection loss (RL ) of -52.4 dB at 1.9 mm and the efficient absorption bandwidth of
min
6.08 GHz at 1.53 mm, which achieves broadband absorption. Core-shell magnetic-dielectric design provides a new
perspective in efficient EM wave absorption systems.
Keywords: Core-shell, FeCoNi@ZnIn S , high broadband, electromagnetic wave absorption
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© The Author(s) 2025. Open Access This article is licensed under a Creative Commons Attribution 4.0
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