Electrostructive Effects in Paraelectric-Ferroelectric-Antiferroelectric Phase Transitions
- 1 July 1980
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 19 (7) , L425-428
- https://doi.org/10.1143/jjap.19.l425
Abstract
Electrostrictive terms have been introduced into the Kittel free energy expression by means of a fourth-order cross term of the two-sublattice polarizations, giving rise to multiple phase transitions. Schematic p-T diagrams of the nonpolar, polar and antipolar phases are classified by the electrostrictive Ω coefficient. Spontaneous strain curves are derived for each of the four types of phase diagrams.Keywords
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