Epitaxial growth of (111)-oriented BaTiO{sub 3}/SrTiO{sub 3} perovskite superlattices on Pt(111)/Ti/Al{sub 2}O{sub 3}(0001) substrates

Journal Article · Mon Sep 09 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4820780· OSTI ID:22218054

Panomsuwan, Gasidit; Takai, Osamu ^[1]; Saito, Nagahiro ^[1]

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1. Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan)

Symmetric BaTiO{sub 3}/SrTiO{sub 3} (BTO/STO) superlattices (SLs) were epitaxially grown on Pt(111)/Ti/Al{sub 2}O{sub 3}(0001) substrates with various modulation periods (Λ = 4.8 − 48 nm) using double ion beam sputter deposition. The BTO/STO SLs exhibit high (111) orientation with two in-plane orientation variants related by a 180° rotation along the [111]{sub Pt} axis. The BTO layer is under an in-plane compressive state, whereas the STO layer is under an in-plane tensile state due to the effect of lattice mismatch. A remarkable enhancement of dielectric constant is observed for the SL with relatively small modulation period, which is attributed to both the interlayer biaxial strain effect and the Maxwell-Wagner effect.

• OSTI ID: 22218054
• Journal Information: Applied Physics Letters, Vol. 103, Issue 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BARIUM COMPOUNDS
COMPRESSION STRENGTH
CRYSTAL DEFECTS
DEPOSITION
DIELECTRIC MATERIALS
ION BEAMS
LAYERS
MODULATION
PERMITTIVITY
PEROVSKITE
STRAINS
STRONTIUM TITANATES
SUBSTRATES
SUPERLATTICES
SYMMETRY
TENSILE PROPERTIES
THIN FILMS
VAPOR PHASE EPITAXY