Diffusive phase transitions in ferroelectrics and antiferroelectrics

Details Diffusive phase transitions in ferroelectrics and antiferroelectrics Diffusive phase transitions in ferroelectrics and antiferroelectrics

2003-02-24

arxiv.org/abs/cond-mat/0302496v1

Physics

Condensed Matter

Materials Science

6 pages, Fundamental physics of ferroelectrics 2003

Scientific paper

10.1063/1.1609936

In this paper, we present a microscopic model for heterogeneous ferroelectric and an order parameter for relaxor phase. We write a Landau theory based on this model and its application to ferroelectric PbFe$_{1/2}$Ta$_{1/2}$O$_3$ (PFT) and antiferroelectric NaNbO$_3$:Gd. We later discuss the coupling between soft mode and domain walls, soft mode and quasi-local vibration and resulting susceptibility function.

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