Reconstructing Symmetrically Magnetic Anisotropy in CoNi/Co Composites for C‐Band Microwave Absorption

ABSTRACT The stability of intelligent life and industry primarily relies on the signal interference shielding among different equipment. The key challenge lies in efficient absorption of electromagnetic waves within the C‐band, which dominates the satellite internet, high‐speed WLAN, and 5/6G communication spectra. Herein, the structural symmetry and surface anisotropy co‐dominated magnetic engineering has been proposed to realize the effective electromagnetic wave absorption within 4–8 GHz. The hierarchical structural morphology optimization has been first developed to guide the configuration integration of symmetric anisotropy, streamline surface, and porous for CoNi‐based alloys. Such hierarchical architecture allows synergy of diversified magnetic configuration, external domain symmetry, and enhanced dipolar coupling interaction, dramatically enhancing magnetic resonance absorption within C‐bands. Our results provide a preparation idea for acquiring precise modulation of magnetic resonance eigenfrequency while realizing high‐performance low‐frequency microwave absorbers.