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- W1978622076 abstract "Electrical conduction measurements on TeO2 single crystals are made both for orientations ‖ and ⊥ to the tetragonal symmetry axis. Below ≈ 400°C, a single Arrhenius plot is obtained in each orientation, with activation energies E‖ = 0.54 and E⊥ = 0.42 eV. It is concluded that conductivity in this range is ionic, falling into the extrinsic dissociation range of behavior. Possibly, oxygenion vacancies are responsible. At high temperature the conductivity increases sharply due to reduction of the sample and the onset of electronic carriers. La conduction éléctrique de cristaux de TeO2 a été measurée dans les deux principales directions, ‖ et ⊥ à l'axe tetragonal de symmetrie. En-dessous de 400°C et dans les deux directions, nous obtenons deux courbes d'Arrhenius ayant respectivement pour énergie d'activation E‖ = 0,54 et E⊥ = 0,42 eV. Nous en concluons que, dans cet intervalle de températures la conduction est à caractère ionique et correspond à la region extrinsique dissocié. Les lacunes d'oxygène sont probablement les porteuses de charge. A haute température, la coductivité augmente considérablement, ceci étant dǔ à la réduction du cristal qui s'accompagne de l'apparition d'électrons porteurs." @default.
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- W1978622076 date "1981-10-16" @default.
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- W1978622076 title "Electrical conduction in paratellurite (TeO2) crystals" @default.
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- W1978622076 doi "https://doi.org/10.1002/pssa.2210670242" @default.
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