Abstract
We have investigated by high-resolution transmission electron microscopy SrTiO3/SrRuO3bilayer films epitaxially grown on LaAlO3substrate. At the SrRuO3/LaAlO3interface we frequently observe dissociated superdislocations in connection with Ruddlesden-Popper-type planar defects. These superdislocations can contribute to misfit relaxation equivalent to a perfect misfit dislocation with Burgers vector a〈110〉. The formation and the geometry of this defect arrangement is discussed in detail. The Sr-rich Ruddlesden-Popper-defect can be introduced by composition fluctuations during film deposition. It can be concluded that it can act as a source for the generation of misfit dislocations.
| Original language | English |
|---|---|
| Pages (from-to) | 603-609 |
| Number of pages | 7 |
| Journal | Journal of Crystal Growth |
| Volume | 234 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 1 Jan 2002 |
| Externally published | Yes |
Keywords
- A1. High resolution electron microscopy (HRTEM)
- A1. Interface structure
- A1. Misfit dislocation source
- A1. Partial dislocation
- A1. Ruddleson-Popper planar defects
- B1. Perovskites
ASJC Scopus subject areas
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry
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