Magnetic property measurements on single wall carbon nanotube polyimide composites | Zendy

Keun J. Sun | Zendy; Russell A. Wincheski | Zendy; Cheol Park | Zendy

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Magnetic property measurements on single wall carbon nanotube polyimide composites

Author(s) -

Keun J. Sun,

Russell A. Wincheski,

Cheol Park

Publication year - 2008

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.2832616

Subject(s) - carbon nanotube , materials science , polyimide , nanocomposite , magnetization , composite material , diamagnetism , composite number , coercivity , nanotube , magnetic field , condensed matter physics , layer (electronics) , physics , quantum mechanics

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.

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