Magnetic properties of multi-walled carbon nanotubes encapsulated Fe/Co particles

摘要：

The experimental apparatus by self-designed was used,Fe/Co particles encapsulated in multi-walled carbon nanotubes (MWCNTs) were prepared by the method of anodic arc discharging plasma.The products were characterized by transmission election microscopy,Raman spectroscopy and X-ray diffractometry.The magnetic properties of the products were characterized with vibration sample magnetometer.The TEM results show that MWCNTs have little impurity and good particles size,and Fe/Co with high continuity encapsulaties in carbon nanotubes.The saturated magnetization (σs),remanence (σm) and coercivity (Hc) of the sample are 17.30 A/(m·kg),3.96 A/(m·kg) and 31 521.60 A/m,showing better ferromagnetism compared with the bulk Fe/Co.The optimal conditions in this case are as follows: a helium gas atmosphere of 6.0×104 Pa,an arc current of 70 A,a voltage drop of 24 V,a constant distance of about 2 mm between the anodes and cathode,metallic powder contents of Fe and Co of 15.0％ (mass fraction) and 15.0％,respectively,and well cooled electrodes and collector.This process is a convenient and effective that Fe/Co particles can be encapsulated in MWCNTs.

关键词： multi-walled carbon nanotubes Fe/Co particles anodic arc magnetic properties

作者: LI Wei-xue CUI Yong-fu HAO Yuan CHEN Ti-jun DAI Jian-feng WANG Qing WU Zhong-li LI Yang

作者单位: Department of Physics,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Key Laboratory of Department of Physics,Lanzhou University of Technology,Lanzhou 730050,China Gansu Key Laboratory of New Nonferrous Metal Materials,Lanzhou University of Science and Technology,

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）