Growth of YBa2Cu3O7 films with [110] tilt of CuO planes to surface on SrTiO3 crystals

Artikel i vetenskaplig tidskrift, 2013

YBa2Cu3O7 films with the CuO plane tilted to the surface have been grown on SrTiO3 crystalline substrates by pulsed laser deposition. This tilt was obtained by rotating the film lattice with respect to the substrate surface around its [110] axis oriented parallel to the surface. The zero tilt of the CuO plane was implemented at the orientation of the SrTiO3 crystal surface parallel to the (100) plane. The rotation angles were varied in the range from 0A degrees to 70A degrees. It is found that, being tilted at any angle, the CuO planes of the film remain parallel to one or several crystallographic planes of the (100)-type substrate. In the range of tilt angles from 0A degrees to 49A degrees, the film has a single-crystal structure. Above 49A degrees the film is transformed into a three-domain texture and its surface roughness sharply increases.