Top Page » Past Lecture & Seminar (2013) » 243rd MSL Lecture
(Dr. Jean-Michel Kiat, Directeur, Ecole Centrale Paris)
243rd MSL Lecture
(Dr. Jean-Michel Kiat, Directeur, Ecole Centrale Paris)
Date/Time 2013/04/18 13:30-14:30
Place Suzukake Hall Meeting Room 2
OrganizerMaterials and Structures Laboratory
ContactProfessor Mitsuru ITOH(5354)

Subject & Detail

243rd MSL Lecture

Lecturer: Dr. Jean-Michel Kiat (Directeur, Ecole Centrale Paris)

Subject: "Core-shell structure of ferroelectric compounds :modelisation and experiments”

Summary:In this talk we will discuss both experimental and theoretical results on nanopowders and ceramics built on nanoparticles, showing the importance, at nanosizes, to take into account the core-shell structure of particles to understand their properties. Experimental results on ferroelectric and associated compounds (e.g. relaxors, morphotropic compounds, quantum paraelectric) will be presented. New ab-initio calculation and Landau theory of core-shell nanoceramic will be proposed, as well as their predictions, such as the existence of vortices and new phase diagram etc. Limitation of these models will also be discussed and tentatively a way to a Landau theory based on toroidal moment as order parameter will be pointed-out.

 

 

 

 

 

 

 

 

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