The effects of annealing step-edges on SrTiO3 and MgOsingle-crystal substrates on YBa2Cu3O7Josephson junctions

摘要

The effect of annealing step-edges on SrTiO3 and MgO single-crystal substrates on Josephson junctions of YBa2Cu 3O7, has been studied. The step-edge was fabricated by argon-ion milling technique and was annealed at 1050°C in oxygen atmosphere. YBa2Cu3O7 thin film was deposited on the annealed step-edge by a standard pulsed laser deposition. The effect of annealing the step-edge on the junction was characterized by AFM and current-voltage (I-V)characteristic. The annealed step-edge on SrTiO3 and MgO substrates showed that the surface of the substrates was smoother and I-V characteristic of Josephson junction improved