Pr. Mimoun EL-MARSSI

Picardy Jules-Verne University, Amiens, France.

Perovskites are known to be very sensitive to even small distortion and their properties can be modified by mechanical constraints within the superlattice (SL). The lattice strain variations within the constituent layers of the artificial SL may change profoundly properties of each layer. Stress effects govern physical properties of thin films and SLs and better understanding of these factors is obviously required to achieve reliability of ferroïc properties desirable for device engineering. Here, we show how the physical properties are changed compared to those known in bulk materials or in conventional single films depending on modulation period and layer thickness of alternating compounds.

Mimoun El Marssi is Professor at University of Picardy, Amiens in France. He is the head of the laboratory of Physics of Condensed Matter (LPMC). He conducts research on the synthesis and characterization of ferroïc materials with controlled structures and functionalities for electronic and energy. A large part of his research concerns the use of Raman spectroscopy to study the symmetries, stresses and phase transitions in ferroïc materials bulk, epitaxial thin films and superlattices. Recently, he interested to study the lead-free electrocaloric materials.