# An LGD model with extrinsic nucleations for polarization dynamics in ferroelectric materials and devices

## TL;DR

This paper improves the LGD model for ferroelectric materials by using extrinsic nucleations, leading to better agreement with experiments.

## Contribution

The novel LGD model uses extrinsic nucleations instead of intrinsic ones, enhancing experimental agreement and interpretation.

## Key findings

- The new LGD model improves agreement with experimental results.
- It helps reconcile polarization reversal in poly-crystalline and epitaxial ferroelectrics.

## Abstract

We present a critical reexamination of the Landau–Ginzburg–Devonshire (LGD) model for ferroelectric materials that is based on intrinsic nucleation events. Theoretical considerations and a systematic comparison with experiments steered us towards a novel version and calibration of the LGD model relying instead on extrinsic nucleations. We show that the new model can not only improve the agreement with experiments, but also help reconcile the interpretation of polarization reversal in poly-crystalline and epitaxial ferroelectrics.