LOW-FREQUENCY ELECTRICAL-CURRENT OSCILLATIONS IN VAPOR-ADSORBED FERROCENE

Systematic low-frequency current oscillations were observed in a parti cular temperature range in the ferrocene sample with adsorbed ethanol vapor in a sandwich type of cell configuration. The frequency of curre nt oscillations was found to decrease with the increasing bias voltage . Experiments with 2-propanol vapor have also been performed. Existing theories of current oscillations in semiconductors have failed to exp lain the observed low-frequency current oscillations in this organomet allic semiconductor. Such current oscillations are possibly associated with some kind of time dependent phase changes in the ferrocene-ethan ol (2-propanol) system/surface layer.