Title :
Improvement of the sandwich junction properties by planarization of YBCO films
Author :
Maruyama, M. ; Yoshida, K. ; Horibe, M. ; Fujimaki, A. ; Hayakawa, H.
Author_Institution :
Dept. of Quantum Eng., Nagoya Univ., Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
We have improved the properties of c-axis-oriented YBCO/PBCO/YBCO trilayer junctions using planarization of YBCO films. The root-mean-square value of the film roughness reduces to less than 60% of that of an as-grown film. The junctions made through the planarization exhibit RSJ-like current-voltage characteristics even for 20-nm-thick PBCO interlayers. The characteristic voltage is 0.16 mV at 50 K, which is remarkably improved compared to that of junctions without the planarization.
Keywords :
Josephson effect; barium compounds; high-temperature superconductors; praseodymium compounds; superconducting thin films; surface treatment; yttrium compounds; RSJ model; YBCO film; YBCO/PBCO/YBCO trilayer; YBaCuO-PrBaCuO-YBaCuO; current-voltage characteristics; planarization; sandwich Josephson junction; surface roughness; Electrodes; Etching; Planarization; Rough surfaces; Superconducting films; Surface roughness; Temperature; Virtual colonoscopy; Voltage; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
