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Journal of Applied Physics / Volume 103 / Issue 2 / MAGNETISM AND SUPERCONDUCTIVITY

J. Appl. Phys. 103, 023908 (2008); http://dx.doi.org/10.1063/1.2832616 (6 pages)

Magnetic property measurements on single wall carbon nanotube polyimide composites

Keun J. Sun1, Russell A. Wincheski2, and Cheol Park1

1National Institute of Aerospace, 100 Exploration Way, Hampton, Virginia 23666, USA
2NASA-Langley Research Center, Hampton, Virginia 23681, USA

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(Received 23 April 2007; accepted 18 November 2007; published online 22 January 2008)

Magnetization measurements as a function of temperature and magnetic field were performed on polyimide nanocomposite samples containing various weight percentages of single wall carbon nanotubes. It was found that the magnetization of the composite, normalized to the mass of nanotube material in the sample, decreased with increasing weight percentage of nanotubes. It is possible that the interfacial coupling between the carbon nanotube (CNT) fillers and the polyimide matrix promotes the diamagnetic response from CNTs and reduces the total magnetization of the composite. The coercivity of the samples, believed to originate from the residual magnetic catalyst particles, was enhanced and had stronger temperature dependence as a result of the composite synthesis. These changes in magnetic properties can form the basis of a new approach to investigate the interfacial properties in the CNT nanocomposites through magnetic property measurements.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
  3. RESULTS AND DISCUSSION
    1. Nanocomposites
    2. Magnetic responses of low magnetic particle concentration SWCNTs
  4. SUMMARY

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KEYWORDS and PACS

Keywords

carbon nanotubes, coercive force, diamagnetic materials, filled polymers

PACS

  • 75.20.Ck

    Nonmetals

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2832616

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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