| 铁磁性金属填充碳纳米管的微波吸收机理研究 |
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| 引用本文： | 彭志华,彭延峰,宁艳桃,郭燕春.铁磁性金属填充碳纳米管的微波吸收机理研究[J].佳木斯工学院学报,2011(3):403-405,411. |
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| 作者姓名： | 彭志华 彭延峰 宁艳桃 郭燕春 |
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| 作者单位： | 南华大学数理学院,湖南衡阳421001 |
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| 基金项目： | 湖南省科技计划项目（2010FJ4092）; 湖南省自然科学衡阳联合基金重点项目（10JJ8005） |
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| 摘 要： | 深入探讨了铁磁性金属填充碳纳米管的微波吸收机理,对铁纳米粒子填充碳纳米管的微波吸收特性进行了数值模拟,计算了其自然共振频率,模拟结果与实验数据相吻合理论上证明了铁磁性金属填充碳纳米管对微波的强烈吸收主要是样品中铁磁性金属纳米粒子在微波作用下产生了磁共振的结果研究发现,随着铁磁性金属填充碳纳米管薄膜厚度的增加,其共振频率vγ向低频方向移动,随着碳纳米管中铁磁性金属纳米粒子含量的增加,vγ向高频方向移动因此,通过改变样品厚度和碳纳米管中铁磁性纳米粒子含量,可以实现对微波的调谐吸收
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| 关 键 词： | 碳纳米管 铁磁性金属 微波吸波机理 自然共振 |
Investigation on the Microwave Absorbing Mechanisms of Ferromagnetic Metals-filled CNTs |
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| Authors: | PENG Zhi-hua PENG Yan-feng NING Yan-tao GUO Yan-chun |
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| Affiliation: | (School of Mathematics and Physics,University of South China,Hengyang 421001,China) |
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| Abstract: | The microwave absorbing mechanisms of CNTs filled with ferromagnetic metals are investigated.Under microwave radiation,the natural resonance frequency of CNTs filled with Fe nanoparticles is calculated.The simulation results are consistent with the experimental data.It is theoretically revealed that strong microwave absorption by CNTs filled with ferromagnetic metals is predominantly caused by the magnetic resonance of ferromagnetic metal nanoparticles in the sample.It is found that resonance frequency vγ shifts towards low frequency with the increase of film thickness of CNTs filled with Fe nanoparticles,and vγ shifts towards high frequency with ferromagnetic nanoparticle content percentage increasing in the sample.Thus,tuning absorption of microwave by CNTs filled with Fe nanoparticles can be realized via the control of the sample thickness or ferromagnetic nanoparticle content percentage among CNTs. |
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| Keywords: | carbon nanotube ferromagnetic metal microwave absorbing mechanism natural resonance |
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