Suppression of antiphase domain boundary formation in Ba{sub 0.5}Sr{sub 0.5}TiO{sub 3} films grown on vicinal MgO substrates
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742 (United States)
Ba{sub 0.5}Sr{sub 0.5}TiO{sub 3} (BST) thin films were epitaxially grown on MgO vicinal substrates by pulsed-laser deposition and molecular-beam epitaxy. [001] oriented MgO substrates with 2 deg. and 5 deg. miscut toward [010] were selected. The nucleation of antiphase domain boundaries in the direction parallel to the step edges is greatly reduced in BST films grown on the vicinal substrates compared to the films grown on flat substrates. The reduction in antiphase domain boundaries gives rise to a higher dielectric constant when the electrodes are parallel to the direction of the steps, by about 280-460, than in the perpendicular direction.
- OSTI ID:
- 20634321
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 14 Vol. 85; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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