Interfacial dislocations in (111) oriented (Ba0.7Sr0.3)TiO3 films on SrTiO3 single crystal
Creators
- 1. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- 2. National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, College of Engineering and Applied Science, and Collaborative Innovation Center of Advanced Materials, Nanjing University, Nanjing 210093 (China)
- 3. Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Yokohama 226-8502 (Japan)
- 4. PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
- 5. Department of Materials, Physics and Energy Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan)
Description
We have investigated the interfacial structure of epitaxial (Ba,Sr)TiO3 films grown on (111)-oriented SrTiO3 single-crystal substrates using transmission electron microscopy (TEM) techniques. Compared with the (100) epitaxial perovskite films, we observe dominant dislocation half-loop with Burgers vectors of a〈110〉 comprised of a misfit dislocation along 〈112〉, and threading dislocations along 〈110〉 or 〈100〉. The misfit dislocation with Burgers vector of a〈110〉 can dissociate into two ½a〈110〉 partial dislocations and one stacking fault. We found the dislocation reactions occur not only between misfit dislocations, but also between threading dislocations. Via three-dimensional electron tomography, we retrieved the configurations of the threading dislocation reactions. The reactions between threading dislocations lead to a more efficient strain relaxation than do the misfit dislocations alone in the near-interface region of the (111)-oriented (Ba0.7Sr0.3)TiO3 films
Additional details
Identifiers
- DOI
- 10.1063/1.4932953;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 107
- Journal Issue
- 14
- Journal Page Range
- p. 141605-141605.5
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 47052180
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BURGERS VECTOR; DISLOCATIONS; EPITAXY; FILMS; MONOCRYSTALS; PEROVSKITE; RELAXATION; STACKING FAULTS; STRAINS; STRONTIUM TITANATES; SUBSTRATES; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CRYSTAL DEFECTS; CRYSTAL GROWTH METHODS; CRYSTAL STRUCTURE; CRYSTALS; ELECTRON MICROSCOPY; LINE DEFECTS; MICROSCOPY; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PEROVSKITES; STRONTIUM COMPOUNDS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- (c) 2015 AIP Publishing LLC