A Phenomenological Theory for the PbZrO3: PbTiO3 Solid Solution System with the Spontaneous Polarization and Oxygen Octahedral Tilt Angle as Order Parameters
- 1 January 1985
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 24 (S2)
- https://doi.org/10.7567/jjaps.24s2.209
Abstract
The Landau: Ginsburg: Devonshire (LGD) theory for the singlecell region of the PZT solid solution system developed by Amin, et al. 1) has been extended to include the low temperature rhombohedral phase field, which exhibits compositions having both ferroelectric polarization and tilted oxygen octahedra. An additional term has been added to the elastic Gibbs free energy to account for this tilting. The coefficients of the energy function were determined from a combination of phase boundary requirements and experimental data. The spontaneous polarization and tilt angle were calculated as a function of composition and temperature.Keywords
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