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Étude électrique de couches minces de polymère obtenues dans une décharge luminescente II: Caractérisation électrique sous champ alternatif |
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| Authors: | M. Valentin H. Carchano Ai Bui |
| Affiliation: | Laboratoire de Génie Electrique, Equipe “Matériaux Diélectriques” associée au C.N.R.S., 2 rue Camichel, 31000, Toulouse, France |
| Abstract: | The aim of this study was to investigate the electrical characteristics under alternating stress of a metal-polymer-metal structure, the dielectric of which was a thin layer created by a glow discharge in styrene. The study, carried out in the 250 Hz–100 kHz range between −90° and 150°C, indicates two different domains for the variations of εr and εr'. Using bi-logarithmic coordinates the variation of the a.c. conductivity σac(Ω) obeys the law σac(Ω)∝Ω for temperatures lower than 50°C. In order to explain this result, two hypotheses are proposed: that dipolar fluctuations occur and that a hopping process takes place. |
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