The effects of a static magnetic field on the microwave absorption of hydrogen plasma in carbon nanotubes: a numerical study |
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作者姓名: | 彭志华 龚学余 彭延峰 郭燕春 宁艳桃 |
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作者单位: | School of Mathematics and Physics, University of South China |
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基金项目: | Project supported by the Science Research Program of Hunan Province, China (Grant No. 2010FJ4092) and the National Natural Science Foundation of China (Grant No. 11075073). |
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摘 要: | We theoretically investigate the microwave absorption properties of hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes under an external static magnetic field in the frequency range 0.3 GHz to 30 GHz, using the Maxwell equations in conjunction with a general expression for the effective complex permittivity of magnetized plasma known as the Appleton-Hartree formula. The effects of the external static magnetic field intensity and the incident microwave propagation direction on the microwave absorption of hydrogen plasma in CNTs are studied in detail. The numerical results indicate that the microwave absorption properties of hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes can be obviously improved when the exter- nal static magnetic field is applied to the material. It is found that the specified frequency microwave can be strongly absorbed by the hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes over a wide range of incidence angles by adjusting the external magnetic field intensity and the parameters of the hydrogen plasma.
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关 键 词: | carbon nanotubes hydrogen plasma static magnetic field microwave absorption |
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