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Magnetic and Transport Properties of Ferromagnetic-PEEK Polymer Nanocomposite Prepared via Ion-Implantation

Published online by Cambridge University Press:  01 February 2011

K. Ghosh ,
S. R. Mishra ,
J. Losby ,
T. Kehl ,
B. Robertson ,
T. Kassim ,
R. Patel ,
M. Weigand ,
M. Curry  and
R. E. Giedd
K. Ghosh
Affiliation:
Department of Physics, Astronomy and Materials Science, Southwest Missouri State University, Springfield, MO 65804, U. S. A. Center for Applied Science and Engineering, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
S. R. Mishra
Affiliation:
The Department of Physics, The University of Memphis, Memphis, TN 38152, U. S. A.
J. Losby
Affiliation:
The Department of Physics, The University of Memphis, Memphis, TN 38152, U. S. A.
T. Kehl
Affiliation:
Department of Physics, Astronomy and Materials Science, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
B. Robertson
Affiliation:
Department of Physics, Astronomy and Materials Science, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
T. Kassim
Affiliation:
Department of Physics, Astronomy and Materials Science, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
R. Patel
Affiliation:
Center for Applied Science and Engineering, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
M. Weigand
Affiliation:
Department of Physics, Astronomy and Materials Science, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
M. Curry
Affiliation:
Center for Applied Science and Engineering, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
R. E. Giedd
Affiliation:
Center for Applied Science and Engineering, Southwest Missouri State University, Springfield, MO 65804, U. S. A.
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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 = σo 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 853: Symposium I – Fabrication and New Applications of Nanomagnetic Structures , 2004 , I4.24
Copyright
Copyright © Materials Research Society 2005

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References

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