Abstract
The current-voltage characteristics of high-quality thin tin films, ranging in width from 7 to 50 μm, irradiated by microwave radiation are investigated. The behavior of the critical current Ic and of the maximum current Im for the existence of a stationary flow of the characteristic vortices of the transport current (formation current of the first phase-slip line) is analyzed. The regimes of enhancement and suppression of the currents Ic and Im by a microwave field are studied and analyzed. The criteria for separating films into narrow and wide are established. It is shown that the superconductivity enhancement effect is a general effect and is observed for uniform (narrow films) and nonuniform (wide films) distributions of the superconducting current over the film width.
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