Dual Magnetic Resonances From Site‐Selective Doping of Hexaferrite Yielding Ultrabroadband Microwave Absorption

composition achieves an ultra-wide effective absorption bandwidth (EAB) of 9.02 GHz (2.01 mm thickness). This study establishes an intrinsic, rare-earth-enabled design paradigm for scalable, high-performance microwave absorbers, with direct implications for electromagnetic interference suppression, stealth coatings, and next-generation wireless communication technologies.