PECULIARITIES OF VOLTAGE-CURRENT CHARACTE RISTICS OF ASYMMETRICAL SUPERCONDUCTIVE TUNNEL-JUNCTIONS OBSERVED IN THE MEASUREMENTS UNDER [[VOLTAGE-SOURCE]] REGIME

The peculiarities of static downward voltage-current characteristics o f Sn-I-Pb tunnel junctions have been investigated in the voltages rang e (Delta(Pb)-Delta(Sn))/e < V < (Delta(Pb) + Delta(Sn))/e (where Delta (Pb) and Delta(Sn) are the energy gaps of Pb and Sn, respectively) at transition shift under <<voltage source>> regime. The character of the se peculiarities which varies with the load resistance, temperature an d external magnetic field as well as comparison with the known experim ental results obtained for the Josephson voltage - current characteris tics branches and the existing theory suggests that the descending bra nch is defined by the processes associated with the relaxation oscilla tions present in a system.