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Unusual magnetic behavior of SiCN/multiwalled carbon nanotubes nanocomposites

Francis, A. ; Riedel, R. (2009)
Unusual magnetic behavior of SiCN/multiwalled carbon nanotubes nanocomposites.
In: Journal of Applied Physics, 105 (7)
doi: 10.1063/1.3062958
Article, Bibliographie

Abstract

Multiwalled carbon nanotubes (MWCNTs) have been dispersed homogeneously throughout a preceramic polysilazane matrix. The homogenized mixture was then warm pressed and subsequently pyrolyzed in Ar atmosphere at 1100 °C, yielding an amorphous silicon carbonitride (SiCN)/MWCNT nanocomposite. The hysteresis loop of the 5 vol % CNT/SiCN composite revealed a ferromagneticlike behavior up to 5000 Oe and a semiconductinglike feature at a higher applied field. The magnetic behavior of CNT-rich composites is due mainly to defects and to the interaction between the nanotubes and the SiCN matrix, which is indicated by a shift in the G and D bands of graphitic carbon as determined by Raman spectroscopy. © 2009 American Institute of Physics

Item Type: Article
Erschienen: 2009
Creators: Francis, A. ; Riedel, R.
Type of entry: Bibliographie
Title: Unusual magnetic behavior of SiCN/multiwalled carbon nanotubes nanocomposites
Language: English
Date: 1 April 2009
Publisher: AIP
Journal or Publication Title: Journal of Applied Physics
Volume of the journal: 105
Issue Number: 7
DOI: 10.1063/1.3062958
Abstract:

Multiwalled carbon nanotubes (MWCNTs) have been dispersed homogeneously throughout a preceramic polysilazane matrix. The homogenized mixture was then warm pressed and subsequently pyrolyzed in Ar atmosphere at 1100 °C, yielding an amorphous silicon carbonitride (SiCN)/MWCNT nanocomposite. The hysteresis loop of the 5 vol % CNT/SiCN composite revealed a ferromagneticlike behavior up to 5000 Oe and a semiconductinglike feature at a higher applied field. The magnetic behavior of CNT-rich composites is due mainly to defects and to the interaction between the nanotubes and the SiCN matrix, which is indicated by a shift in the G and D bands of graphitic carbon as determined by Raman spectroscopy. © 2009 American Institute of Physics

Uncontrolled Keywords: carbon nanotubes, diamagnetic materials, ferrimagnetic materials, magnetic hysteresis, nanocomposites, pyrolysis, silicon compounds, soft magnetic materials
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 12 Apr 2012 11:00
Last Modified: 05 Mar 2013 10:00
PPN:
Funders: This work was financially supported by the Alexander von Humboldt (AvH) foundation.
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