Multilayer core–shell structured FeNi_(3)@C with enhanced interfacial polarization for microwave absorbers  

作　　者：Shaohan Guo Junying Zhang Chengyou Lin Jin Ge Song Bi Zhi-Ling Hou 

机构地区：[1]College of Mathematics and Physics,Beijing University of Chemical Technology,Beijing 100029,China [2]School of Physics and Optoelectronic Engineering,Beijing University of Technology,Beijing 100124,China [3]National Key Laboratory of Electromagnetic Information Control and Effects,Shenyang Aircraft Design and Research Institute,Shenyang 110035,China [4]501 Department,Xi’an Research Institute of High-Tech,Xi’an 710025,China

出　　处：《Nano Research》2025年第2期833-842,共10页纳米研究(英文版)

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.52273260 and 62175010);the National Key Laboratory of Electromagnetic Information Control and Effects Open Fund(No.SYS1W2023010303).

摘　　要：Magnetoelectric composites can achieve magneto-electric synergy to optimize impedance matching.However,it is challenging to enhance the broadband absorption performance for thin thickness absorbers.Herein,FeNi_(3)@C composite with magnetic alloy core and N-doped macroporous multilevel layered carbon shell was constructed by hierarchical interface engineering.The uniform multilevel layered carbon shell could induce interfacial polarization and multiple scattering,and further endows enhanced electromagnetic attenuation and optimized impedance matching.An ultra-thin broadband absorber with an effective absorption bandwidth of 7.4 GHz is achieved at a thickness of only 1.6 mm.Moreover,full-band absorption from 2 to 18 GHz at a thickness of 9.8 mm is realized through metastructure design.This work provides an alternative strategy to prepare coreshell structured magnetoelectric composites for ultra-thin and broadband absorbers.

关 键 词：covalent organic frameworks(COFs) FeNi_(3)@C core-shell structure interfacial polarization impedance matching 

分 类 号：TB34[一般工业技术—材料科学与工程]