中国物理B ›› 2012, Vol. 21 ›› Issue (7): 78102-078102.doi: 10.1088/1674-1056/21/7/078102

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

The effects of static magnetic field on microwave absorption of hydrogen plasma in carbon nanotubes: A numerical study

彭志华, 龚学余, 彭延峰, 郭燕春, 宁艳桃   

  1. School of Mathematics and Physics, University of South China, Hengyang 421001, China
  • 收稿日期:2011-12-12 修回日期:2012-02-22 出版日期:2012-06-01 发布日期:2012-06-01
  • 基金资助:
    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).

The effects of static magnetic field on microwave absorption of hydrogen plasma in carbon nanotubes: A numerical study

Peng Zhi-Hua(彭志华)†, Gong Xue-Yu(龚学余), Peng Yan-Feng(彭延峰), Guo Yan-Chun(郭燕春), and Ning Yan-Tao(宁艳桃)   

  1. School of Mathematics and Physics, University of South China, Hengyang 421001, China
  • Received:2011-12-12 Revised:2012-02-22 Online:2012-06-01 Published:2012-06-01
  • Contact: Peng Zhi-Hua E-mail:hndxpzh@sina.com
  • Supported by:
    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 highpressure 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 external 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.

关键词: carbon nanotubes, hydrogen plasma, static magnetic field, microwave absorption

Abstract: We theoretically investigate the microwave absorption properties of hydrogen plasma in iron-catalyzed highpressure 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 external 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.

Key words: carbon nanotubes, hydrogen plasma, static magnetic field, microwave absorption

中图分类号:  (Nanotubes)

  • 81.07.De
52.30.Ex (Two-fluid and multi-fluid plasmas) 85.75.Ss (Magnetic field sensors using spin polarized transport) 84.40.-x (Radiowave and microwave (including millimeter wave) technology)