High field and ac properties of steric acid films
- 28 October 1971
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 4 (15) , L301-L304
- https://doi.org/10.1088/0022-3719/4/15/001
Abstract
Electrical measurements are reported on multimolecular layer stearic acid films sandwiched evaporated metal electrodes, under high field dc conditions and small signal ac conditions over a wide range of frequencies down to 10-4 Hz. Measurements were taken in the temperature range 105-373 K. DC measurements show the characteristic Poole's law dependence I varies as exp(esE/kT) where 2s is the distance between Poole centres, I is the current and E the field. The ac measurements give the ac conductivity sigma ( omega ) varies as omega n, where the exponent n tends to unity at low temperatures and to 0.5 at high temperatures. These results appear to be consistent with the behaviour expected of hopping carriers.Keywords
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