One-Dimensional Magnetic FeCoNi Alloy Toward Low-Frequency Electromagnetic Wave Absorption

Bintong Yang; Jiefeng Fang; Chunyang Xu; Hui Cao; Ruixuan Zhang; Biao Zhao; Mengqiu Huang; Xiangyu Wang; Hualiang Lv; Renchao Che

doi:10.1007/s40820-022-00920-7

One-Dimensional Magnetic FeCoNi Alloy Toward Low-Frequency Electromagnetic Wave Absorption

Nanomicro Lett. 2022 Aug 20;14(1):170. doi: 10.1007/s40820-022-00920-7.

Authors

Bintong Yang¹, Jiefeng Fang¹, Chunyang Xu¹, Hui Cao², Ruixuan Zhang¹, Biao Zhao¹, Mengqiu Huang¹, Xiangyu Wang¹, Hualiang Lv³, Renchao Che^{4

5}

Affiliations

¹ Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Fudan University, Shanghai, 200438, People's Republic of China.
² Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Fudan University, Shanghai, 200438, People's Republic of China. caohui@fudan.edu.cn.
³ Willian G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA. yexuexun5309@163.com.
⁴ Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Materials Science, Fudan University, Shanghai, 200438, People's Republic of China. rcche@fudan.edu.cn.
⁵ Zhejiang Laboratory, Joint-Research Center for Computational Materials, Hangzhou, 311100, People's Republic of China. rcche@fudan.edu.cn.

Abstract

Rational designing of one-dimensional (1D) magnetic alloy to facilitate electromagnetic (EM) wave attenuation capability in low-frequency (2-6 GHz) microwave absorption field is highly desired but remains a significant challenge. In this study, a composite EM wave absorber made of a FeCoNi medium-entropy alloy embedded in a 1D carbon matrix framework is rationally designed through an improved electrospinning method. The 1D-shaped FeCoNi alloy embedded composite demonstrates the high-density and continuous magnetic network using off-axis electronic holography technique, indicating the excellent magnetic loss ability under an external EM field. Then, the in-depth analysis shows that many factors, including 1D anisotropy and intrinsic physical features of the magnetic medium-entropy alloy, primarily contribute to the enhanced EM wave absorption performance. Therefore, the fabricated EM wave absorber shows an increasing effective absorption band of 1.3 GHz in the low-frequency electromagnetic field at an ultrathin thickness of 2 mm. Thus, this study opens up a new method for the design and preparation of high-performance 1D magnetic EM absorbers.

Keywords: Improved electrospinning; Lower-frequency electromagnetic wave absorption; Medium-entropy magnetic alloy; Off-axis electronic holography technique; One-dimension.