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This work presents results of superconducting properties studies of xNbN-(100-x)SiO_2 (where x = 80 mol%) films of the thickness from 450 to 1950 nm. The films were prepared by thermal nitridation of sol-gel derived xNb_2O_5-(100-x)SiO_2 coatings. The nitridation process of Nb_2O_5-SiO_2 coatings leads to the formation of weakly disordered structures, with NbN metallic grains dispersed in the matrix...
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