DC ELECTRIC CONDUCTIVITY IN FILMS OF ALUMINUM FINE PARTICLES PREPARED BY EVAPORATION IN HELIUM GAS

It was reported in a previous paper that aluminum granular films prepared by means of gas evaporation in helium showed enhanced superconductivity. In the present experiment, a temperature dependence of D. C. electrical resistivities of these films is measured by means of a four contact method. It is found that absolute values of the resistance depend on the film thickness but the most of the films show temperature independent resistivity. These features are interpreted in terms of electronic mean free path and the particle size of the films. © 1969, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.