J. Phys. IV France 02 (1992) C2-185-C2-188
Reversible and irreversible electrical switching in TeO2-V2O5 based glassesF. MAZURIER, M. LÉVY and J. L. SOUQUET
Laboratoire d'Ionique et d'Electrochimie du Solide, E.N.S.E.E.G., 1130 rue de la Piscine, Domaine Universitaire, BP. 75, 38402 Saint Martin d'Hères Cedex, France
The switching phenomenon observed in electronically conductive glasses corresponds to a sudden decrease in electrical resistance of the sample when a large electric field is applied. A simple electrothermal model is developed which takes into account only a Joule effect overheating of the material. In a temperature range below the glass transition temperature, Tg, the switching is reversible. On the other hand, in a temperature range above Tg, a conductive crystalline phase is irreversibly formed leading to a permanent high conductivity state.
© EDP Sciences 1992