Growth of YBa2Cu3O7 Films with [100] Tilt of CuO Planes with Respect to the Surface on MgO Crystals
| Autor: | Evgeni Stepantsov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics General Chemistry Substrate (electronics) 010403 inorganic & nuclear chemistry Condensed Matter Physics Epitaxy 01 natural sciences 0104 chemical sciences Pulsed laser deposition Crystal Condensed Matter::Materials Science Tilt (optics) Condensed Matter::Superconductivity 0103 physical sciences Surface roughness General Materials Science Texture (crystalline) Single crystal |
| Zdroj: | Crystallography Reports. 64:326-330 |
| ISSN: | 1562-689X 1063-7745 |
| DOI: | 10.1134/s1063774519020287 |
| Popis: | Epitaxial YBa2Cu3O7 films with CuO plane tilted with respect to the surface have been grown on crystalline MgO substrates by pulsed laser deposition. Directly before growing a film, a nucleation-center-forming SrTiO3 sublayer with an effective thickness less than the unit-cell size was deposited on the substrate. The tilt angle was varied in the range from 0° (at which CuO planes are oriented parallel to the surface) to 70°. The film lattice rotation is implemented at this tilt due to the substrate rotation around its [100] axis, oriented parallel to the surface. Zero tilt of the CuO plane occurs when the MgO crystal surface is oriented parallel to the (100) plane. It is found that the CuO film planes remain parallel to one or several crystallographic planes {100} of the substrate at any tilt angles. In the range of angles from 0° to 41° the film is a single crystal. At angles larger than 41° the film is transformed into a two-domain texture, and its surface roughness sharply increases. |
| Databáze: | OpenAIRE |
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