Figure 1
From: Substrate mediated nitridation of niobium into superconducting Nb2N thin films for phase slip study

(a–d) Schematic presentation of the nitridation process for the transformation of Nb to Nb2N by using high temperature annealing with Si3N4/Si substrate. Arrows indicate the step wise process protocol. (e) Chemical representation of the reaction between Nb and Si3N4 under high temperature annealing leading to the formation of Nb2N.