Objetivo The main objective is the study of structural and magnetic properties of classical magnets and ferroelectrics at nanometer scale as well as a study of their potential applications. For this purpose new types of nanocomposites with materials embedded in porous matrixes with typical pore diameters of a few nm will be prepared by an original technology. The present project focuses on magnetic and structural ordering as well as phase transitions in the classical ferromagnets (Fe, Ni), antiferromagnets (MnO, CoO, FeO) and ferroelectrics (NaNO2, KH2PO4) embedded in nanoporous matrixes. We will utilize as matrixes a porous glass with irregular system of pores, novel mesoporous materials MCM-41 and SBA-15, artificial opals and a natural mineral - chrysotile asbestos with regular system of nano-channels and highly oriented nanopores in polymeric " track membranes" and porous alumina.The aims of our investigations are to evidence and characterize:- The effect of finite size and pore topology on temperature shift and character of phase transition in confined magnetic and ferroelectric materials;- The effect of finite size on fundamental properties of magnets and ferroelectrics: magnetic moment, type of ordering, size of nanoparticle and magneto-ordered area, thermal vibration amplitudes;- The effect of magnetic and crystal symmetry on phase transition in confinement;- The new peculiarities of nanostructured materials, which are absent in bulk materials, namely, the unusually low thermal expansion coefficients observed in the embedded metals or the super-high dielectric permittivity observed in embedded ferroelectrics.The same compounds MnO and NaNO2 embedded in the different matrixes: glasses, mesoporous materials, opals, asbestos, track membranes and porous alumina will be studied to determine the effect of mean pore diameter and topology of cavities. To study the effect of magnetic symmetry, antiferromagnets with characteristics embedded in the same matrix will be studied.All teams presented in the project actively carry out researches in the field of nanomaterials. The knowledge obtained by the present study will enable us to define and to evaluate the possible ways top use these systems for technical applications. Programa(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Tema(s) 1B - Condensed Matter, Optics and Plasma Physics NANO - NANO : Nano-scale Materials and Structures Convocatoria de propuestas Data not available Régimen de financiación Data not available Coordinador Center national de la recherche scientifique; Commissariat de l'Energie Atomique Aportación de la UE Sin datos Dirección Centre d'Etudes de Saclay 91191 Gif-sur-Yvette Francia Ver en el mapa Coste total Sin datos Participantes (7) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Cnetre national de la recherche Scientifique. Commissariat a l'Energie Atomique Francia Aportación de la UE Sin datos Dirección Orme des Merisiers CEA/Saclay 91191 Gif-sur-Yvette Ver en el mapa Coste total Sin datos Hahn-Meitner Institute Alemania Aportación de la UE Sin datos Dirección Glienicker Strasse 100 14109 Berlin Ver en el mapa Coste total Sin datos Institute Josef Stefan Eslovenia Aportación de la UE Sin datos Dirección Jamova 39 1000 Ljubljana Ver en el mapa Coste total Sin datos Rostov State University Rusia Aportación de la UE Sin datos Dirección 194 Stachki Street 344090 Rostov-on-Don Ver en el mapa Coste total Sin datos Russian Academy of Sciences Rusia Aportación de la UE Sin datos Dirección Politekhnicheskaya 26 194021 St. Petersburg Ver en el mapa Coste total Sin datos Russian Academy of Sciences Rusia Aportación de la UE Sin datos Dirección Orlova Roscha 188350 Gatchina, St. Petersburg region Ver en el mapa Coste total Sin datos Universite Paris Sud Francia Aportación de la UE Sin datos Dirección Batiment 349 91405 Orsay Ver en el mapa Coste total Sin datos
