Piezoelectricity in the Dielectric Component of Nanoscale Dielectric-Ferroelectric Superlattices

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.104.207601· OSTI ID:992524

Jo, Ji Young ^[1]; Sichel, Rebecca ^[1]; Lee, Ho Nyung ^[2]; Nakhmanson, Serge ^[3]; Dufresne, Eric M. ^[3]; Evans, Paul G. ^[1]

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1. University of Wisconsin, Madison
2. ORNL
3. Argonne National Laboratory (ANL)

The origin of the functional properties of complex oxide superlattices can be resolved using time-resolved synchrotron x-ray diffraction into contributions from the component layers making up the repeating unit. The CaTiO{sub 3} layers of a CaTiO{sub 3}/BaTiO{sub 3} superlattice have a piezoelectric response to an applied electric field, consistent with a large continuous polarization throughout the superlattice. The overall piezoelectric coefficient at large strains, 54 pm/V, agrees with first-principles predictions in which a tetragonal symmetry is imposed on the superlattice by the SrTiO{sub 3} substrate.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 992524
• Journal Information: Physical Review Letters, Vol. 104, Issue 20; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
DIELECTRIC MATERIALS
ELECTRIC FIELDS
FUNCTIONALS
ORIGIN
OXIDES
PIEZOELECTRICITY
POLARIZATION
STRAINS
SUPERLATTICES
SYMMETRY
SYNCHROTRONS
X-RAY DIFFRACTION