@article{Guo2025, 
author = {Shaohan Guo and Junying Zhang and Chengyou Lin and Jin Ge and Song Bi and Zhi-Ling Hou},
title = {Multilayer core–shell structured FeNi3@C with enhanced interfacial polarization for microwave absorbers},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {2},
pages = {94907151},
keywords = {impedance matching, covalent organic frameworks (COFs), interfacial polarization, FeNi3@C, core‒shell structure},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907151},
doi = {10.26599/NR.2025.94907151},
abstract = {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, FeNi3@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 core–shell structured magnetoelectric composites for ultra-thin and broadband absorbers.}
}