Low Temperature Physics: 42, 905 (2016); https://doi.org/10.1063/1.4965898
Fizika Nizkikh Temperatur: Volume 42, Number 10 (October 2016), p. 1154-1166 ( to contents , go back )
Oscillations of non-isothermal N/S boundary with a high frequency and large amplitude
A.I. Bezuglyj1 and V.A. Shklovskij2
1National Science Center “Kharkov Institute of Physics and Technology” 1 Akademicheskaya Str., Kharkov 61108, Ukraine
2V. N. Karazin National University, Kharkiv 61077, Ukraine
Received June 11, 2016
Within the framework of the phenomenological approach based on the heat balance equation and the dependence of the critical temperature of the superconductor on the current value theoretically investigated the impact of high-frequency current of high amplitude and arbitrary shape on the non-isothermal balance of the oscillating N/S interface in a long superconductor. We introduce a self-consistent average temperature field of rapidly oscillating non-isothermal N/S boundary (heat kink), which allows to go beyond the well-known concept of mean-square heating and consider the impact of current waveform. With regard to experiments on the effects of microwave high-power radiation on the current-voltage characteristics (CVC) of superconducting films, we give the classification of the families of the CVC for inhomogeneous superconductors which carry a current containing a high frequency component of large amplitude. Several characteristics have hysteresis of thermal nature.
PACS:74.25.N– Response to electromagnetic fields;
Key words: superconducting films, non-isothermal N/S boundary, high frequency oscillations.
Published online: August 29, 2016