Abstract
Measurements have been made of the conductance-temperature characteristics in the range 77°–573 °K of thin discontinuous platinum films on glass substrates under vacuum conditions and in air. The reversibility of the conductance changes has been found to depend on the deposition and annealing temperatures, the film resistance and the ambient atmosphere. The experimental data are interpreted in terms of tunneling through a surface layer containing adsorbed gaseous ions and account is taken of ion redistribution and metal-island re-orientation. Infra-red transmission studies of the glass substrates and partial pressure gas analysis have been carried out in order to examine the effects of adsorbed gases.
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