Journal
JOURNAL OF ELECTROCERAMICS
Volume 24, Issue 1, Pages 15-19Publisher
SPRINGER
DOI: 10.1007/s10832-008-9435-0
Keywords
Perovskite; Ferroelectric; Epitaxial; Functionality
Categories
Funding
- Graduate School in Electronics
- Telecommunications and Automation
- Infotech Oulu Graduate School
- Academy of Finland [118250]
- EU [027468]
- Academy of Finland (AKA) [118250, 118250] Funding Source: Academy of Finland (AKA)
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In epitaxial films of perovskite ferroelectrics, functionality can be controlled by size-strain-surface effects. Experimental evidence of such a possibility is demonstrated in epitaxial heterostructures of BaTiO(3) thin films and of (Ba,Sr)TiO(3) superlattices grown by pulsed laser deposition on La(0.5)Sr(0.5)CoO(3)/MgO (001). In epitaxial BaTiO(3) films, temperature of phase transition is shown to be a function of in-plane biaxial strain and film thickness. In epitaxial (Ba,Sr)TiO(3) superlattices, the dielectric permittivity, tunability, and temperature of phase transition are shown to be a function of strain and superlattice period. The technological and principal problems limiting nanoscale engineering of ferroelectric functionality are also discussed.
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