Piezoelectricity in the dielectric component of nanoscale dielectric-ferroelectric superlattices.
Phys Rev Lett
; 104(20): 207601, 2010 May 21.
Article
en En
| MEDLINE
| ID: mdl-20867066
ABSTRACT
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 CaTiO3 layers of a CaTiO3/BaTiO3 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 SrTiO3 substrate.
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01-internacional
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2010
Tipo del documento:
Article
País de afiliación:
Estados Unidos