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2010-11 Magneto-BTO IMHOTEP

Les  partenariats Hubert Curien (PHC) IMHOTEP s'inscrivent dans le cadre de la politique de soutien aux échanges scientifiques et technologiques internationaux du ministère des Affaires étrangères et européennes et sont mis en œuvre avec le soutien du ministère de l'Education nationale, de l'Enseignement supérieur et de la Recherche.

Etude 

Participants:

Mimoun EL MARSSI (coordinator), Igor Lukyanchuk
Laboratoire de Physique de la Matière Condensée
Université : Université de Picardie Jules Verne Amiens, France

Inas Kamal Battisha (coordinator), Emad Girgis 
National Research Centre Giza, Egypt


The project is devoted to synthesis and investigation of advanced nano-structure ferroelectrics, which exhibit enhanced optical emission properties. In particularly, we suppose to study the rare earth doped BaTiO3 and (Ba,Sr)TiO3 oxides that present the advanced functionality due to their enhanced light emission coefficient and nonlinear optical effects. We propose the exploitation of such effects, including materials synthesis modeling and characterization that will lead finally to new devices having significant potential applications in information processing, storage and display, lighting, telecom technologies, etc.

 We suppose to deliver the ferroelectric, nano-structured BaTiO3 and (Ba,Sr)TiO3 materials in two different forms: thin films and powders using the non expensive and local technology, in particularly the home-made (Egypt) spinner and the dipping computerized apparatus for preparing thin film. Developing of such domestic technologies is very important for Egypt participants since this will allow to avoid the substantional import expanses for equipment.  The project will permit to transform the National Research Center into a leader in this technology in Egypt, and help to economize the research money due to local fabricating of such materials.

 The project is based on the considerable and complementary expertise of participating French and Egyptian teams and reinforces their activity. The Egyptian participants offer material synthesis and acquire from their French partners a wide range of characterization methods and device preparation schemes.  Such transfer of scientific expertise and technology has a clear priority and is of the strategic importance. The discovering of new ferroelectric properties during the size variation of ferroelectric particles dispersed in an inert BaTiO3 and (Ba,Sr)TiO3 matrix is highly probable due to dramatic change of ferroelectric instability with particle size. 

Objectives and  motivation

 -Synthesis of rare earth and transition element ions doped BaTiO3 and (Ba,Sr)TiO3 powders and nano-structured thin-films using chemical and physicochemical –sol-gel- methods.
- Structural and physicochemical studies and optimization of the materials.
- Characterization and understanding of luminescence and optical up-conversion mechanisms and investigation of size effects.
- Development of practical devices for planar geometry and optical free-space and waveguide functional devices. Demonstration of their functional performance. 

 -The large-scale strategic goal of the project is related to the development of a new technology implemented through the synthesis of novel nano-structured materials exhibiting advanced light emission functionalities, study and exploitation of novel fundamental effects: