Synthesis of Core-Shell structured Ferrite Particles with Selective Absorption at Multiple Frequencies in Millimeter-wave Range
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.
Authors
- Pung Keun Song (ORCID: https://orcid.org/0000-0001-5683-2015)
- Youn‐Kyoung Baek
- Min S. Yun (ORCID: https://orcid.org/0000-0001-7095-7543)
- Jae Yong Jung (ORCID: https://orcid.org/0000-0003-4520-0586)
- Byeongjin Park (ORCID: https://orcid.org/0000-0003-3607-6755)
- Hye-Jin Park (ORCID: https://orcid.org/0000-0001-9718-7876)
Publication Details
- Journal
- Journal of Magnetics
- Published
- 2024-12-31
- DOI
- https://doi.org/10.4283/jmag.2024.29.4.405
- Citations
- 1
- Primary Topic
- Magnetic Properties and Synthesis of Ferrites
- Type
- article
- Field-Weighted Citation Impact
- 0.12