Tunable negative permittivity and permeability in FeNiMo/Al2O3 composites prepared by hot-pressing sintering
Source abstract
Abstract
Abstract FeNiMo/Al 2 O 3 composites with different FeNiMo content were prepared by hot-pressing sintering. Interestingly, simultaneous negative permittivity and permeability were realized in FeNiMo/Al 2 O 3 composites with 30% FeNiMo content in the frequency range of 860 MHz to 1 GHz and in the frequency range of 890 MHz to 1 GHz for composites with 40% FeNiMo content. Experimental results and theoretical simulations indicate that the negative permeability is caused by the domain wall resonance and gyromagnetic spin resonance, while the negative permittivity is attributed to the plasma oscillation of conduction electrons and LC resonance. The negative permittivity of the FeNiMo/Al 2 O 3 composite induced by the plasma oscillation of conduction electrons was analyzed using the Drude model. The fitting results indicated that the plasma frequency of the composites was 8.99 GHz.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metamaterials and Metasurfaces Applications · Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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