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Experimental method for controlling the overheating of superconducting films under the action of a pulsed current
Vasyutin M. A.
1, Kuz’michev N. D.
1, Shilkin D.A.
1
1Mordovia State University, Saransk, Russia
Email: vasyutinm@mail.ru, kuzmichevnd@yandex.ru, shilkinda@yandex.ru
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 with temperatures below and above the temperature of transition 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. Keywords: niobium nitride films, time sweep of the current, resistive front, normal domain.
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