Effect of ion irradiation and stabilizing annealing on critical currents of superconducting NbN thin film

K. E. Prikhod'ko^ab, G. Yu. Golubev<sup>b

a</sup> National Engineering Physics Institute "MEPhI", Moscow, Russia
^b National Research Centre "Kurchatov Institute", Moscow, Russia

Abstract: The effect of composite ion irradiation on the critical currents of superconductive niobium nitride NbN thin-film is considered. The I–V curve of 20 $\times$ 20 $\mu$mm samples with a thickness of 5.5 nm were obtained after irradiation with a composite ion beam (consisting of protons with 1% of oxygen) with an energy of 1 keV to various fluencies. The effect of irradiation and stabilizing annealing at 200$^\circ$C for 1 hour on the critical currents of the superconducting transition is estimated.

Keywords: niobium nitride, ion irradiation, superconductors, thin films.

Received: 05.05.2023
Revised: 19.06.2023
Accepted: 28.06.2023

DOI: 10.21883/PJTF.2023.17.56079.19621

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