Size effects in nanophase PbTiO/sub 3

Size effects in nanophase PbTiO/sub 3

Intrinsic size effects in PbTiO/sub 3/ are considered within the framework of the Landau-Ginzburg-Devonshire free energy density formalism. Coefficients of the free energy functional for point group 4 mm were determined as a function of size, using experimentally determined size-dependent order para...

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Bibliographische Detailangaben
Hauptverfasser: Akdogan, E.K., Safari, A.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Capacitive sensors
Crystallization
Ferroelectric devices
Ferroelectric materials
Nanoscale devices
Optical films
Optical modulation
Polarization
Thermodynamics
Titanium compounds
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Beschreibung
Zusammenfassung:Intrinsic size effects in PbTiO/sub 3/ are considered within the framework of the Landau-Ginzburg-Devonshire free energy density formalism. Coefficients of the free energy functional for point group 4 mm were determined as a function of size, using experimentally determined size-dependent order parameters (spontaneous polarization and strains) in the range 28-149 nm. The proposed thermodynamic theory is adequate to describe the observed size-driven changes in phase stability in tetragonal PbTiO/sub 3/.
ISSN:1099-4734
2375-0448
DOI:10.1109/ISAF.2000.941603