High-frequency electromagnetic performance and microwave absorption enhancement of Ba1-x(La0.5Y0.5)xFe12O19
Electromagnetic wave absorbing materials are increasingly pivotal in areas such as stealth technology for weapon systems and electromagnetic shielding for precision instruments.Magnetic ferrite materials,renowned for their exceptional electromagnetic tunability,have been extensively investigated as versatile multi-band absorbers.To tackle the challenges posed by narrow absorption bands and high absorption frequencies in ferrite-based absorbers,this study developed rare earth-doped Ba1-x(La0.5Y0.5)xFe12O19(with x values of 0.1,0.2,0.3,0.4,and 0.5)ab-sorbers utilizing the sol-gel method.This innovative approach effectively lowered the natural resonance frequency of Ba-ferrite,induced multiple magnetic resonance peaks,and significantly broadened the absorption band spectrum.Notably,the sample exhibiting the highest absorption capability achieved a remarkable reflection loss of-40 dB at a matching thickness of 4 mm and an absorption frequency of 11.2 GHz.Underscores the viability of fine-tuning the absorbing properties of ferrites through the incorporation of rare earth elements,offering crucial insights for the ad-vancement of high-performance ferrite absorbing materials within the S-Ku(2-18 GHz)frequency range.
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