Nano Archive

Magnetic behavior of iron-filled multiwalled carbon nanotubes

Sharma, Surinder M. and Karmakar, S. and Mukadam, M. D. and Yusuf, S. M. and Sood, A. K. (2005) Magnetic behavior of iron-filled multiwalled carbon nanotubes. Journal of Applied Physics, 97 (5). 054306 . ISSN 0021-8979

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Abstract

Using vibrating-sample magnetometry, magnetic properties of iron-filled multiwalled carbon nanotubes have been investigated. The field dependence of dc magnetization at high magnetic fields suggests that these tubes behave as a one-dimensional exchange-coupled ferromagnetic system. At 5 K, the saturation magnetization (MS) of the nanowires is found to be 85 emu/g, which is much less than the expected bulk value ~210 emu/g. The observed exchange bias, in spite of the small fraction of gamma-Fe in our samples, implies that gamma-Fe may not be the only antiferromagnetic component responsible for the exchange bias in these Fe-filled carbon nanotubes. Quantitative study on the temperature dependence of saturation magnetization, remanent magnetization and coercivity has been carried out.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Physical Science > Nanomagnetics
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:4381
Deposited By:JNCASR
Deposited On:02 Apr 2009 11:40
Last Modified:02 Apr 2009 11:40

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