4.6 Article

Influence of substrate stress on in-plane and out-of-plane ferroelectric properties of PZT films

Journal

JOURNAL OF APPLIED PHYSICS
Volume 131, Issue 1, Pages -

Publisher

AIP Publishing
DOI: 10.1063/5.0072503

Keywords

-

Funding

  1. Fonds National de la Recherche (FNR) [FNR-PRIDE/15/10935404, INTER/ANR/18/12618689]

Ask authors/readers for more resources

Solution-deposited ferroelectric films are affected by mechanical stress, and the choice of substrate material plays a crucial role in the ferroelectric response. The study found that the polarization direction and intensity of ferroelectric thin films change under different stress conditions.
Solution-deposited ferroelectric films often are under mechanical stress due to the difference in thermal expansion coefficients between films and substrate materials. Knowledge of how stress changes the ferroelectric response under different actuation conditions is essential when selecting a substrate for film deposition. Here, a comparative study of the ferroelectric properties of lead zirconate titanate thin films on transparent fused silica glass and sapphire substrates is presented. Sapphire exerts a compressive in-plane stress on the film, favoring an out-of-plane domain orientation, while fused silica causes tensile in-plane stress and a predominantly in-plane domain configuration. As expected, the out-of-plane polarization is high under in-plane compressive stress but reduced by a factor of nearly 4 by in-plane tensile stress. In contrast, the in-plane polarization shows an unexpectedly weak stress dependence. It is larger by only about 10% under tensile stress compared to compressive stress. Permittivity increases when the major domain orientation does not coincide with the electric field. The observations are explained based on a model taking into account the crystallographic structure of the film.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available