Экспериментальный метод контроля перегрева сверхпроводящих пленок под действием импульсного тока

Abstract

Using time sweeps of the current through a sample of a superconducting film, the effect of the current sweep rate on the process of heat propagation from current contacts is investigated. The samples used were NbN films located below and above the transition temperature to the superconducting state. A method for determining the critical heating of key zones of the sample is proposed. The propagation velocities of the resistive front and normal domain in a superconductor are estimated at different temperatures.