Events

Gwenn Morvezen presents

 New shaping and dielectric and calorimetric characterization of molecular ferroelectric materials for electric energy applications

Monday, December 16th 2024 at 9:30 am

Room 2A006 – GreenER

Link visio: https://univ-grenoble-alpes-fr.zoom.us/j/97436184471?pwd=Pqncuz2T25M4bOsCLyze3quoU5UAxD.1

The defence will be in French.

Abstract: Ferroelectric materials are employed in many applications, such as non-volatile memories (using remanent polarization), infrared cameras (pyroelectricity) and high-precision actuators (piezoelectricity). Most of these materials contain lead, whose toxicity and high density have prompted industry to look for alternatives, notably in organic materials such as dabcoHAs, the subject of this thesis. Initial studies are devoted to understanding the dielectric and calorimetric properties of these materials, in order to gain a better understanding of the internal dynamics of the molecules. A second, more exploratory part highlights novel phenomena at low temperatures and the possibility of depositing the material in sub-micrometer layers. This work provides a better understanding of the dielectric and thermodynamic properties of these materials, and opens up promising horizons for their application.