Title :
Modified deposition procedure for high quality YBa/sub 2/Cu/sub 3/O/sub 7-x//SrTiO/sub 3/ bilayers
Author :
Talyansky, V. ; Petersen, K. ; Doughty, C. ; Xi, X.X. ; Venkatesan, T.
Author_Institution :
Dept. of Phys., Maryland Univ., College Park, MD, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
The degradation of an ultrathin YBCO layer under SrTiO/sub 3/ due to oxygen deficiency poses a fundamental problem in growing a bilayer which may be patterned into a superconducting FET. Annealing between depositions while growing the bilayer can help increase the T/sub c/ of the YBCO while retaining acceptable quality of the SrTiO/sub 3/. This study found T/sub c/ in the range of 60-80 K for a 4 unit-cell thick YBCO film under SrTiO/sub 3/.<>
Keywords :
annealing; barium compounds; high-temperature superconductors; pulsed laser deposition; strontium compounds; superconducting thin films; yttrium compounds; 60 to 80 K; YBa/sub 2/Cu/sub 3/O/sub 7-x//SrTiO/sub 3/ bilayers; YBa/sub 2/Cu/sub 3/O/sub 7/-SrTiO/sub 3/; annealing; critical temperature; degradation; deposition; oxygen deficiency; superconducting FET; ultrathin YBCO layer; Annealing; Degradation; Insulation; Nonhomogeneous media; Pulsed laser deposition; Stress; Substrates; Temperature; Voltage; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
