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Frequency‐dependent resistivity and magnetoresistivity of iodine doped conducting polyaniline
Author(s) -
Chakraborty G.,
Sarkar A.,
Ghosh P.,
Meikap A.K.,
Chowdhury P.
Publication year - 2009
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21332
Subject(s) - polyaniline , materials science , dielectric , condensed matter physics , conductivity , doping , electrical resistivity and conductivity , magnetic field , atmospheric temperature range , capacitor , low frequency , magnetoresistance , voltage , composite material , polymer , electrical engineering , thermodynamics , physics , optoelectronics , chemistry , quantum mechanics , astronomy , polymerization , engineering
The electrical transport properties of hydroiodic acid doped polyaniline in the temperature range 77 ≤ T ≤ 300 K were studied. The magnetic field strength was varied to a maximum of 1T in the frequency range of 20 Hz–1 MHz. The ac conductivity followed the universal dielectric response σ′( f ) ∞ f s . The trend in the variation of ‘s’, the temperature dependence of the frequency exponent, indicated that correlated barrier hopping is the dominating charge transport mechanism. The ac conductivity also shows a positive variation with magnetic field, which can be interpreted by Maxwell‐Wagner capacitor model. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers