Title :
Size effects in nanophase PbTiO/sub 3/
Author :
E.K. Akdogan;A. Safari
Author_Institution :
Dept. of Ceramic & Mater. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
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/.
Keywords :
"Ferroelectric materials","Crystallization","Polarization","Optical films","Capacitive sensors","Thermodynamics","Ferroelectric devices","Nanoscale devices","Optical modulation","Titanium compounds"
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.941603
