Title :
The effects of annealing step-edges on SrTiO3 and MgO single-crystal substrates on YBa2Cu3O7 Josephson junctions
Author :
Hwang, Yunseok ; Kim, Jin-Tae ; Lee, Soon-Gul
Author_Institution :
Dept. of Phys., Korea Univ., Seoul, South Korea
fDate :
12/1/2001 12:00:00 AM
Abstract :
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
Keywords :
Josephson effect; annealing; atomic force microscopy; barium compounds; high-temperature superconductors; pulsed laser deposition; superconducting junction devices; superconducting thin films; yttrium compounds; 1050 degC; AFM; Josephson junctions; MgO; SrTiO3; YBa2Cu3O7; YBa2Cu3O7-MgO; YBa2Cu3O7-SrTiO3; annealing step-edges; current-voltage characteristic; high Tc superconductors; ion milling technique; single-crystal substrates; standard pulsed laser deposition; superconducting films; Annealing; Fabrication; Josephson junctions; Laser ablation; Milling; Optical pulses; Pulsed laser deposition; SQUIDs; Substrates; Superconducting films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
