Fizika Nizkikh Temperatur: Volume 45, Number 11 (November 2019), p. 1387-1390    ( to contents , go back )

The influence of electromagnetic radiation of the meter range on the current-voltage characteristics of wide superconducting films

I.V. Zolochevskii, A.V. Terekhov, E.V. Bezuglyi, L.O. Ischenko, and E.V. Khristenko

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Nauki Ave., Kharkiv 61103, Ukraine
E-mail: zolochevskii@ilt.kharkov.ua

Received April 1, 2019, revised May 23, 2019, published online September 26, 2019

Abstract

The effect of the rf electromagnetic field (tens of MHz) on the current-voltage characteristic (IVC) of a wide superconducting film is experimentally investigated. It is shown that under the action of the rf electromagnetic field, the range of vortex resistivity is significantly expanded due to rapid suppression of the critical current with a slower change in the upper stability limit of the vortex state. It was found that with an increase in the rf irradiation power, the structure of the IVC associated with the phase-slip lines is being smoothed and eventually disappears. A model of the IVC of the film in the adiabatic regime is proposed, which explains the effects of smoothing of the current steps and suppression of the critical current.

Key words: superconducting films, resistive vortex state, high-frequency electromagnetic irradiation.

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