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논문 기본 정보

저자정보
(Korea Institute of Materials Science) (Korea Institute of Materials Science) (Korea Institute of Materials Science) (Korea Institute of Materials Science) (Pusan National University) (Korea Institute of Materials Science)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.29 No.4
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    초록·키워드

    This study presents a facile synthesis method for core-shell structured ferrite composite particles designed to achieve selective electromagnetic absorption across multiple frequency bands in the millimeter-wave range. Strontium hexaferrite (SrFe<sub>12</sub>O<sub>19</sub>) epsilon ferrite (ε-Fe₂O₃) core-shell particles were synthesized by sequentially combining spray drying and polydopamine-assisted self-assembly. The resulting composite particles exhibited multiple ferromagnetic resonance (FMR) peaks at 54, 71, and 84 GHz, with tunable absorption properties enabled by Ga substitution in ε-Fe₂O₃. This simple synthesis approach presents a promising pathway to develop absorbers with frequency-selective capabilities across multiple bands in the millimeter-wave range, thereby providing the potential to mitigate electromagnetic interference (EMI) in 5G/6G generation wireless communication devices and autonomous vehicle radar systems.

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