Negative permittivity behavior and magnetic properties of C/YIG composites at radio frequency
| Autor: | Kai Sun, Min Chen, Zidong Zhang, Feng Dang, Chuanbing Cheng, Xu-ai Wang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Permittivity Materials science Mechanical Engineering Yttrium iron garnet chemistry.chemical_element Relative permittivity 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Drude model chemistry.chemical_compound Delocalized electron chemistry Mechanics of Materials 0103 physical sciences lcsh:TA401-492 Diamagnetism lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science Composite material 0210 nano-technology Carbon |
| Zdroj: | Materials & Design, Vol 97, Iss, Pp 454-458 (2016) |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2016.02.119 |
| Popis: | The yttrium iron garnet composites containing carbon particles with different carbon content were prepared by the impregnation-carbonization process. The dielectric and magnetic properties have been investigated experimentally in the frequency range from 10 MHz to 1 GHz. When the carbon content increased to 13 wt%, the carbon particles interconnected with each other, leading to the formation of conductive network. The plasma oscillation of delocalized electrons resulted in the negative permittivity. The negative permittivity behavior was analyzed by Drude model. The fitting result indicated that the plasma frequency of the composite was 7.09 GHz. Meanwhile, the composite with 13 wt% carbon content presented the negative susceptibility in the frequency range from 300 MHz to 1 GHz due to the combined contribution of magnetic resonance and diamagnetic response. Keywords: Double negative materials, C/YIG composites, Percolation threshold, Low frequency plasmonic state |
| Databáze: | OpenAIRE |
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