Surface conduction versus bulk conduction in pure stoichiometric NiO crystals
- 1 December 1982
- journal article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 46 (6) , 659-667
- https://doi.org/10.1080/01418638208223551
Abstract
From the measurement of three-probe resistivities, which are much larger than two-probe resistivities, we conclude that annealed, nominally pure and nearly stoichiometric NiO single crystals normally have a low-resistivity surface layer which masks the behaviour of the bulk in most electrical measurements. Bulk resistivities larger than 1016 Ω cm have been measured below 100°C. It is possible that the results of nearly all previous Hall, resistivity and thermoelectric-power measurements made on high-resistivity samples are indicative of the surface rather than the bulk properties of NiO.Keywords
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