Abstract
In the superconducting thin films of some metals (e.g. Al, Sn) at certain conditions (temperatures, dc current densities) the low frequency (compared to Josephson frequency) oscillation of electric potential takes place - so called non-Josephson oscillation (NJO). This phenomenon is related to nonequilibrium dynamics of phase-slip centers (PSC). We studied experimentally the conditions of NJO excitation and its characteristics in thin tin films both with PSCs and with artificial structures of the Superconductor-Normal metal-Superconductor (SNS) type under the influence of microwave field of frequency 10 10 Hz. It was found that NJO could be observed in narrow rf power range only when SNS have been transformed to SS'S by the field influence, but NJO characteristics differed from that in the unperturbed case.
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