Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 61, Issue 8, Pages 1357-1361Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0022-3697(99)00390-X
Keywords
polymers; intermetallic compounds; electrical conductivity; electrical properties; thin films
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AC conductivity of poly(vinyl alcohol) polymer modified by MnSO4 with different concentration from 100 Hz to 100 KHz in the temperature range 293-343 K is reported. Obtained data reveal that AC conductivity is proportional to omega(s) in all compositions (5, 10, 15, 20% MnSO4 by weight). The value of sigma(AC)(omega) depends linearly on the frequency, with slope S ranging between 0.95 and 0.65. The value of S was found to be temperature dependent, which decreases by increasing temperature. This suggests that the Correlated Barrier Hopping model is the most likely mechanism. Moreover, W-M the polaron binding energy, W the height of coulomb barrier, R the hopping distance, R-min the minimum hopping distance, and E-a the activation energy were calculated and found to be composition dependent. (C) 2000 Elsevier Science Ltd. All rights reserved.
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