FLAME-inars

Our Speakers

11th March 2021 – Talk 5:

Be in the loop with antiferroelectrics

Prof. Dr. Brahim Dkhil University Paris-Saclay, CentraleSupélec Smart and Functional Materials Research Group Structures, Properties and Modeling of Solids Laboratory

Abstract

Polarization-Electric field (P-E) loops can exhibit different shapes with some resembling to those of antiferroelectrics but without being antiferroelectric materials. I will discuss some of our recent works we did and are doing with antiferrroelectric and antiferroelectric-like materials and will highlight the role of defects or intermediate phases. Beyond energy storage applications, I will also show how these materials can be used for electrocaloric issues and how we can tune and play with these loops. I will also discuss some others potential applications we are interested in, such as memories and photo-based devices.

Brahim Dkhil is the head of the Smart and Functional Materials group at CentraleSupélec and works since a long time on ferroelectrics and related materials, such as relaxors, antiferroelectrics, multiferroics, etc…

His research activity aims at better understanding the physical mechanisms at play in these materials through their structures-properties relationships and better exploit their functionalities.

About the FLAME-inars

The FLAME-inars are organized by the collaborative project FLAME at TU Darmstadt, in which electronic-structure-property relationships are being developed and exploited to realize novel lead-free antiferroelectric compounds. The seminars will gather experts in processing, characterization and theory to discuss materials and applications, bulk and thin films, fundamental properties, electronic structure & defects, and related aspects.