Multimechanism Decoupling for Low-Frequency Microwave Absorption Hierarchical Fe-Doped Co Magnetic Microchains

The rapid development of military and civilian electronic communication technology poses a severe challenge to controlling electromagnetic radiation pollution in the low-frequency microwave band. This study introduces a novel one-step feeding self-assembly and ripening strategy to synthesize 1D@2D magnetic microchains (Co@Fe_xCo_1-xOOH, CFC). The experimental and simulation results show that increasing the flux length and ordered orientation is very important to improve the absorption performance of 1D magnetic absorber. The CFC-LC-E (long-chain CFC aligned along the electric field direction) prepared based on the above characteristics successfully achieves a high-performance microwave absorption effect, with a minimum reflection loss value (RLmin) of −66.4 dB. Notably, it maintains stable performance against oblique incidence (within 90°) and polarizations (transverse electric and transverse magnetic). This work offers novel ideas in the fabrication of 1D magnetic microwave absorbers and the analysis of microwave absorption mechanisms.