Journal
CURRENT APPLIED PHYSICS
Volume 31, Issue -, Pages 99-104Publisher
ELSEVIER
DOI: 10.1016/j.cap.2021.08.002
Keywords
Hexaferrite; Permittivity; Permeability; Ferromagnetic resonance; Reflection loss; EM absorption
Funding
- Research Fund of the Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science and ICT [2017R1C1B2002394]
- Basic Science Research Capacity Enhancement Project (National Research Facilities and Equipment Center) through the Korea Basic Science Institute - Ministry of Education [2019R1A6C1010047]
- National Research Foundation of Korea [2017R1C1B2002394] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
The research reported on the tunable electromagnetic wave absorption properties of Fe-deficient SrFe9.6-xCo1.2Ti1.2O19 hexaferrite-epoxy composites. As the Fe content decreased with increasing x, the ferromagnetic resonance (FMR) frequency also decreased gradually, leading to changes in the electromagnetic absorption frequency range.
We report the tunable electromagnetic (EM) wave absorption properties of Fe-deficient SrFe9.6-xCo1.2Ti1.2O19 hexaferrite-epoxy composites. SrFe9.6-xCo1.2Ti1.2O19 hexaferrite powders were prepared via solid-state reaction routes. It was observed that Sr-Ti-rich second phases were formed as x increased, i.e., the Fe content decreased. The ferromagnetic resonance (FMR) frequency of the composites gradually decreased from 8.8 GHz to 4.8 GHz with increasing x, and accordingly, the EM absorption frequency range also gradually changed. The gradual FMR frequency shift was attributed to the compositional shift in the mother phase. It is predicted that the Fe deficiency caused a decrease in the magnetocrystalline anisotropy, and in turn, it shifted the FMR frequency and modified the corresponding EM absorbing properties. All the samples demonstrated a high EM absorption performance with the lowest reflection loss of < -40 dB at the optimized frequency and thickness.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available