BIAXIALLY ALIGNED (013) YBA2CU3O7-DELTA FILMS ON VICINAL (011) SRTIO3

Epitaxial YBa2Cu3O7-delta (013) films have been grown by pulsed laser deposition onto exact and vicinal (011) SrTiO3 substrates. X-ray diffr action measurements showed that the films contained two mirror-related orientations when grown on exact (011) surfaces, but that a strong pr eference for only one of the two (013) orientations developed when the substrate surface was tilted by about 2 degrees toward the [0(1) over bar1$] SrTiO3 direction. The inclination removed the two-fold symmetr y of the surface to induce this preference, resulting in a film with ( 013) film parallel to (011) substrate and [100] film parallel to [100] substrate. Films with a single (013) orientation may offer some disti nct practical advantages over other monocrystalline film orientations.