Electrospinning of FeNiCo/carbon nanofibers: a new paradigm for lightweight microwave absorbers

• • FeNiCo/CNF composites achieve a minimum reflection loss (RLmin) of −55.5 dB at 14.24 GHz with an ultrathin matching thickness of 1.6 mm, demonstrating exceptional absorption efficiency critical for lightweight stealth applications. • • The (FeNi)3Co2/CNF composite exhibits optimized impedance matching and magnetic-dielectric synergy, enabling effective electromagnetic energy dissipation across a broad frequency range, essential for practical radar absorption. • • Electrospinning enables precise control of coercivity and permeability through systematic modulation of magnetic metal composition, allowing tailored electromagnetic properties for specific frequency bands. • • Radar cross-section (RCS) simulations confirm significant RCS reduction across a wide angular range, validating the material's potential for stealth technology and electromagnetic interference mitigation.