Title :
High-quality YBCO thin films grown by off-axis PLD geometry
Author :
Boffa, V. ; Petrisor, T. ; Gambardella, Umberto ; Ciontea, L. ; Bruzzese, R. ; Fabbri, F. ; Barbanera, S.
Author_Institution :
Centro Ricerche Energia Frascati, ENEA, Rome, Italy
fDate :
6/1/1997 12:00:00 AM
Abstract :
In order to improve the surface quality of the pulsed laser deposited YBCO thin films an off-axis deposition geometiy is proposed. Using this new PLD geometry, YBCO thin films have been grown on SrTi03 substrates. These films were found to have a good surface morphology without droplets or other particulates, and good supelrconducting and structural properties. We have obtained Tc(R=0)=89 K, R(300)/R(100)=2.6, ΔT=1.5 K, Jc=2×106 A/cm2 (at 77 K and zero magnetic field), and the FWHM of the rocking curve of (005) YBCO peak is about 0.12°. A study regairding the influence of the deposition parameters on the film quality is also presented.
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; pulsed laser deposition; superconducting thin films; superconducting transition temperature; surface topography; yttrium compounds; 89 K; SrTiO/sub 3/; SrTiO/sub 3/ substrates; YBCO thin films; YBa/sub 2/Cu/sub 3/O/sub 7/; good surface morphology; off-axis PLD geometry; off-axis deposition geometry; pulsed laser deposited; rocking curve; Geometrical optics; Geometry; Magnetic films; Optical pulses; Pulsed laser deposition; Superconducting thin films; Surface emitting lasers; Surface morphology; Transistors; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
