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Interfacial defects distribution and strain coupling in the vertically aligned nanocomposite YBa2Cu3O7-X/ BaSnO3 thin films.
- Source :
- Journal of Materials Research; 2012, Vol. 27 Issue 13, p1763-1769, 7p
- Publication Year :
- 2012
-
Abstract
- In this article, we report the unique microstructural characteristics of YBa2Cu3O7-x (YBCO)/BaSnO3 (BSO) nanocomposite thin films on LaAlO3 (LAO) substrates. The BSO secondary phase grows as self-assembled vertically aligned nanopillars uniformly distributed in the superconducting YBCO matrix. Detailed microstructure and strain studies including x-ray diffraction, cross-section and plan-view transmission electron microscopy, and geometric phase analysis reveal that, as the BSO doping concentration varied from 2 mol% to 20 mol%, the nanopillar density increased from 0.26 × 1011/cm2 to 1.44 × 1011/cm2 while the diameter of the nanopillars remains relatively constant (7–8 nm in diameter). The strain state of the YBCO matrix is affected by both lateral and vertical lattice strains; while, the BSO lattice is strongly tuned by YBCO rather than the substrate. A high-density array of dislocations in the order of 1013/cm2 was observed along the vertical heterogeneous interfaces throughout the YBCO film thickness for all doping concentrations. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 08842914
- Volume :
- 27
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- Journal of Materials Research
- Publication Type :
- Academic Journal
- Accession number :
- 76608216
- Full Text :
- https://doi.org/10.1557/jmr.2012.125