Abstract
Thin films of magnetic-nanocomposite are prepared using a novel two step ion-implantation technique. Structural assessment via TEM of the ion bombarded iron-polymer composite shows development of fine magnetic nanoparticles (20-50 A) in a carbonaceous matrix. The experimental temperature dependence of conductivity of the composite, in the temperature range 10–300 K, follows the exponential law σ = σ0 exp [(-To/T)γ], where To and γ are constants. The observed higher values of γ > 1 imply the presence of more than one conducting channel in the composite. The secondary conducting channels, beside hopping conductivity, may arise from the conducting graphitic matrix around Fe nanoparticles. The room temperature magneto-transport measurement indicates a 0.5% change in magnetoresistance at 0.5T field. The observed anomalous Hall voltage confirms the presence of magnetic nature of nanoparticles.
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Acknowledgments
This work was supported by the Office of Naval Research (award number N00014-03-1- 0893) and Research Corporation (award number CC6166)
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Ghosh, K., Mishra, S.R., Losby, J. et al. Magnetic and Transport Properties of Ferromagnetic-PEEK Polymer Nanocomposite Prepared via Ion-Implantation. MRS Online Proceedings Library 853, 43–48 (2004). https://doi.org/10.1557/PROC-853-I4.24
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DOI: https://doi.org/10.1557/PROC-853-I4.24