Elsevier

Synthetic Metals

Volume 41, Issues 1–2, 30 April 1991, Pages 113-116
Synthetic Metals

Polymers: Polyacetylene
Spin dynamics and conductivity in polyaniline: Temperature dependence

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Abstract

The relationship between spin dynamics and conductivity in polyaniline has been investigated as a function of temperature. The spin dynamics behavior has been studied from the frequency dependence of the ESR line width, which gives the electron spin-spin relaxation time (T2e). The data can be explained in terms of quasi 1-D spin diffusion with two parameters: the intrachain (D∥), and the interchain (DtT) spin diffusion rates. Our remarkable finding is that the dc conductivity agrees quite well with the interchain diffusion rate D, both as a function of the protonation level y and as a function of temperature. Further, the charge carrier concentration is suggested to be temperature dependent.

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