Magnetoresistance of polypyrrole and polyacetylene

The magnetoresistance (MR) has been measured on polypyrrole doped with tetraethylammonium toluene-4-sulfonate (PPy(TOS), σ RT=25 S/cm) and on polyacetylene ((CH) x , σ RT=2×10 4 S/cm) in the temperature range from 1.3 to 4.2 K up to H=10 T. The data for PPy(TOS) show a positive MR, but for (CH) x sa...

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Bibliographic Details
Published in:Synthetic metals 1996, Vol.76 (1), p.281-284
Main Authors: Abou-Elazab, T.F., Migahed, M.D., Park, H., Park, Y.W., MacNeillis, P., Rabenau, T., Roth, S.
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Magnetoresistance
Organic polymers
Physicochemistry of polymers
Polyacetylene
Polypyrrole
Properties and characterization
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Summary:The magnetoresistance (MR) has been measured on polypyrrole doped with tetraethylammonium toluene-4-sulfonate (PPy(TOS), σ RT=25 S/cm) and on polyacetylene ((CH) x , σ RT=2×10 4 S/cm) in the temperature range from 1.3 to 4.2 K up to H=10 T. The data for PPy(TOS) show a positive MR, but for (CH) x samples they show a positive MR with a maximum, the position of which shifts towards lower fields as the temperature decreases. The obtained data are explained in terms of the effect of the magnetic field on the variable range hopping (VRH).
ISSN:0379-6779
1879-3290
DOI:10.1016/0379-6779(95)03471-U