Growth of YBa2Cu3O7 films with 100 tilt of CuO planes to the surface on SrTiO3 crystals

Artikel i vetenskaplig tidskrift, 2011

YBa2Cu3O7 films with CuO planes tilted to the surface have been grown on SrTiO3 crystals by pulsed laser deposition. The tilt angle was varied in the range from 0A degrees (CuO planes are parallel to the surface) to 70A degrees. At this tilt, the crystalline lattice of the film was rotated by rotating the substrate crystalline lattice around its axis [100], which is oriented parallel to the surface. The zero tilt of CuO planes corresponds to the orientation of the SrTiO3 surface parallel to the (100) plane. It is established that the CuO planes of the film remain parallel to one or several (100)-type planes of the substrate at an arbitrary tilt angle. In the range of tilt angles from 0A degrees to 41A degrees, the film has a single-crystal structure. At tilt angles above 41A degrees, the film is transformed into a two-domain texture and its surface roughness sharply increases.