Enhanced dual frequency microwave absorption performance of magnetic-dielectric multi-interface regulated MWCNTS/MnFe₂O₄/Fe₃O₄/Co quaternary nanocomposite

The present study focuses on the development of radar-absorbing materials (RAM) for electromagnetic interference shielding. Herein, we report on the synthesis of MnFe₂O₄, Fe₃O₄, and cobalt (Co) nanoparticles and their nanocomposites with multi-walled carbon nanotubes (MWCNTs). Characterization techniques including XRD, SEM and VSM were used to confirm the successful formation of nanoparticles and their composites. The nanocomposites showed strong radar absorption properties in the frequency range of 1–20 GHz due to the synergistic effect of MWCNTs and magnetic nanoparticles. Among other nanocomposites, MWCNTs/Fe₃O₄ demonstrated an extremely high electromagnetic wave absorption with a reflection loss min value of − 35.22 dB at 14.2 GHz and RL min of − 16.74 dB at 19.17 GHz. This study offers insights into designing advanced RAM, highlighting potential for next-gen electromagnetic wave absorbers.