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

• Published in: Chinese physics B 2012-07, Vol.21 (7), p.541-545, Article 78102
• Main Author: 彭志华 龚学余 彭延峰 郭燕春 宁艳桃
• Format: Article
• Language: English
• Subjects: Carbon nanotubes; Frequency ranges; Hydrogen plasma; Magnetic fields; Magnetic properties; Mathematical models; Maxwell equation; Microwave absorption; Microwaves; 催化歧化; 微波吸收特性; 数值研究; 氢等离子体; 碳纳米管; 磁化等离子体; 静态磁场; 麦克斯韦方程组
• ISSN: 1674-1056; 2058-3834; 1741-4199
• DOI: 10.1088/1674-1056/21/7/078102

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.