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
Artikel, Bibliographie
Kurzbeschreibung (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
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Francis, A. ; Riedel, R. |
| Art des Eintrags: | Bibliographie |
| Titel: | Unusual magnetic behavior of SiCN/multiwalled carbon nanotubes nanocomposites |
| Sprache: | Englisch |
| Publikationsjahr: | 1 April 2009 |
| Verlag: | AIP |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 105 |
| (Heft-)Nummer: | 7 |
| DOI: | 10.1063/1.3062958 |
| Kurzbeschreibung (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 |
| Freie Schlagworte: | carbon nanotubes, diamagnetic materials, ferrimagnetic materials, magnetic hysteresis, nanocomposites, pyrolysis, silicon compounds, soft magnetic materials |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 12 Apr 2012 11:00 |
| Letzte Änderung: | 05 Mär 2013 10:00 |
| PPN: | |
| Sponsoren: | This work was financially supported by the Alexander von Humboldt (AvH) foundation. |
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