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Neutron Scattering to Probe Couplings in Advanced Hard and Soft Materials : a US DoE Center in Louisiana

Vendredi 5 décembre 2014 11:00 - Duree : 1 heure
Lieu : EMBL, seminar room (room 09), 71 av. des Martyrs, Grenoble

Orateur : Evgueni E. NESTEROV (Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA)

This presentation will describe a research program at the core of a new US Department of Energy funded center in Louisiana. The main scientific focus of this program is to understand the role of coupling in emergent complex materials and its impact on the structure/property relationship, and to explore how this information can be utilized or applied in the guided design of materials with the desired properties. In particular, many of the most interesting materials display coupling both in their static and dynamical behavior, making neutron scattering (elastic and inelastic) the ideal tool to elucidate fundamental relationships. Understanding these relationships is key for the “directed design” of the next generation of materials for both fundamental research and technological applications. This research program takes advantage of the synergy between the expertise of Louisiana faculty and that of the Spallation Neutron Source (SNS) and High Flux Isotope Reactor (HFIR) staff at the Oak Ridge National Laboratory to position the team as leaders in the exploration of complex interactions that give rise to novel phenomena.

On the “hard matter” side, the scientific team focuses on exploration of the static and dynamic properties of transition metal compounds including Sr2RuO4 and Sr3Ru2O7 with transition metal substitutions for Ru, the Fe-based superconductor FeTe1-xSex, and the magnetic Skyrmion lattice phase in Fe1-xCoxSi systems via neutron scattering techniques that emphasize the effects of uniaxial pressure. The soft materials systems under investigation are polymer films and heterostructures involving molecularly organized thin films of semiconducting polymers, multilayer-based magneto-optic organic films, as well as mesostructured assemblies of polyelectrolytes and block copolymers. These systems act as a convenient platform to develop new neutron scattering based techniques in order to investigate the role of non-covalent interactions (van der Waals, charge-charge, etc.) on mesoscale structure, organization and dynamics of organic materials.

Contact : dubouloz@ill.fr

Discipline évènement : (Physique)
Entité organisatrice : (ILL)
Nature évènement : (Séminaire)
Evènement répétitif : (General ILL Seminar - College 1)
Site de l'évènement : Polygone scientifique

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