Piezoelectricity in the dielectric component of nanoscale dielectric/ferroelectric superlattices.

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.104.207601· OSTI ID:979884

Jo, J Y; Sichel, R J; Lee, H N; Nakhmanson, S M; Dufresne, E M; Evans, P G; ORNL,

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: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 979884
• Report Number(s): ANL/MSD/JA-65962
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 2010 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
• 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