Tuning the magnetic properties of iron-filled carbon nanotubes
Tuning the magnetic properties of iron-filled carbon nanotubes
复制标题
DOI：
10.1016/j.carbon.2012.03.040
复制
发表时间：
2012-08-01
期刊：
影响因子：
10.9
通讯作者：
Grobert, N.
中科院分区：
文献类型：
--
作者：
Dillon, F. C.;Bajpai, A.;Grobert, N.
我们通过在两区炉中仔细控制合成参数来调整铁填充多壁碳纳米管（Fe@CNT）的磁性。由于这些样品中铁填充物的尺寸较小，因此它们具有 Fe@CNT 报道的一些最高磁化饱和值。 Fe@CNT 的磁性表征表明，可以通过改变热解温度来系统地调节其矫顽力，而通过优化升华温度可以显着增强饱和磁化强度。可以看出氩气流量对饱和磁化强度或矫顽力影响很小。此外，对剩余磁化强度随时间变化的研究表明，磁化强度衰减率可能有很大差异。 (C) 2012 Elsevier Ltd. 保留所有权利。
We tuned the magnetic properties of iron-filled multi-walled carbon nanotubes (Fe@CNTs) by careful manipulation of the synthesis parameters in a two zone furnace. Due to the small dimensions of iron filling in these samples they have some of the highest values of magnetization saturation reported for Fe@CNTs. Magnetic characterization of the Fe@CNTs revealed that their coercivity can be systematically tuned by varying the pyrolysis temperature, whereas the saturation magnetization can be significantly enhanced by optimization of the sublimation temperature. The rate of argon flow is seen to have little influence on either the saturation magnetization or the coercivity. Furthermore, the study of remnant magnetization as a function of time revealed that magnetization decay rates can be considerably varied. (C) 2012 Elsevier Ltd. All rights reserved.