Title :
Growth of C-axis oriented YBaCuO films on oxidized textured Ni sheets and on (100) and (110) oriented NiO single crystals
Author :
Ginsbach, A. ; Schneider, R. ; Grueninger, H.W. ; Grabe, G.
Author_Institution :
Daimler-Benz Res. Inst., Frankfurt, Germany
fDate :
3/1/1991 12:00:00 AM
Abstract :
YBaCuO films were grown on oxidized textured Ni sheets and on (100)- and (110)-oriented NiO single crystals by magnetron sputter deposition from a stoichiometric tubular target. The properties of the YBaCuO films are investigated as a function of various preparation parameters (oxidation procedure of the sheets, substrate temperature Ts, and superconductor film thickness). At Ts=780°C and for film thickness larger than 200 nm, the films have Tc values around 80 K. The textures of the Ni sheets, NiO layers, and YBaCuO films are determined by using X-ray diffraction in Bragg-Brentano geometry and scanning electron microscopy. It is shown that on textured oxidized Ni the YBaCuO films grow c-axis oriented. For comparison, the properties of films on differently oriented NiO single crystals are investigated. It is found that the film properties are better on (100) than on (110) surfaces
Keywords :
X-ray diffraction examination of materials; crystal orientation; high-temperature superconductors; nickel compounds; scanning electron microscope examination of materials; sputtered coatings; superconducting thin films; superconducting transition temperature; (100) surface; (110) surface; 780 degC; Bragg-Brentano geometry; NiO; X-ray diffraction; YBaCuO; c-axis orientation; crystal orientation; high temperature superconductors; magnetron sputter deposition; scanning electron microscopy; stoichiometric tubular target; superconductor film thickness; thin film growth; Crystals; Oxidation; Sputtering; Substrates; Superconducting epitaxial layers; Superconducting films; Superconducting magnets; Temperature; X-ray diffraction; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
