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

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 0° (CuO planes are parallel to the surface) to 70°. 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 0° to 41°, the film has a single-crystal structure. At tilt angles above 41°, the film is transformed into a two-domain texture and its surface roughness sharply increases.