Objetivo Garnets compose an extensive family of ferrimagnetic, antiferromagnetic and paramagnetic crystals with various properties, which can easily be changed by substitution of the ions in the crystal lattice. This is one of the reasons why crystals and films of garnets found a broad application in various devices. Photomagnetic phenomena were originally discovered in yttrium iron garnet. For a long time this crystal remained the only example in the garnet family with these effects. However, in the last year's metastable persistent photoexcited states were also discovered in the paramagnetic and antiferromagnetic phases of manganese germanium garnets and in paramagnetic terbium gallium garnet. These states arise because of the existence of photoexcited long-living centres and because of their light-induced redistribution as a result of optical charge transfer transitions. Hitherto the mechanisms responsible for the photoinduced effects in garnets are not sufficiently understood. Yet, there is reason to assume that metastable light-induced changes of the material properties should be common phenomena in garnets. This project wants to reveal the nature of the metastable photoinduced states in ferrimagnetic, antiferromagnetic and paramagnetic garnets and to identify the responsible photosensitive centres. To accomplish this task leading research groups in this field from INTAS and NIS member states have decided to join their efforts and expertise.The search for new photosensitive garnets and the comparison of peculiarities and regularities of their metastable photoexcited states play a key role in this project. For promoting future applications with these materials one of the objectives of the project is to develop a phenomenological description and, later on, a microscopic model for the photoinduced effects. To that purpose the effect of polarized and unpolarised light on optical, magneto-optical, and magnetic properties, its kinetics and temperature dependences of different parameters will be investigated for rare earth and yttrium garnets, garnets with 3d-ions in the octahedral positions, rare earth paramagnetic gallates and aluminates. Another objective is the demonstration of recording of holographic gratings, in particular, of magnetic gratings. This opens new perspectives for the application of photosensitive garnets, namely long-term optical storage of high density, processing of information, and production of holographic elements for neutron optical 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 INTAS - INTAS Convocatoria de propuestas Data not available Régimen de financiación Data not available Coordinador Universitat Wien Aportación de la UE Sin datos Dirección Strudlhofgasse 4 1090 Wien Austria Ver en el mapa Coste total Sin datos Participantes (7) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Centre National de la Recherche Scientifique Francia Aportación de la UE Sin datos Dirección 1 Place Aristide Briand 91195 Meudon Ver en el mapa Coste total Sin datos Kiev National Shevchenko University Ucrania Aportación de la UE Sin datos Dirección Vladimirskaya str. 60 252033 Kiev Ver en el mapa Coste total Sin datos National Academy of Sciences of Ukraine Ucrania Aportación de la UE Sin datos Dirección Lenin Ave. 47 310164 Kharkov Ver en el mapa Coste total Sin datos Research Institute of Mineral and Metal Materials Alemania Aportación de la UE Sin datos Dirección Struthstra?e 2 55743 Idar-Oberstein Ver en el mapa Coste total Sin datos Tashkent State University Uzbekistán Aportación de la UE Sin datos Dirección Vuzgorodok 700095 Tashkent Ver en el mapa Coste total Sin datos Tashkent State University Uzbekistán Aportación de la UE Sin datos Dirección Vuzgorodok 700095 Tashkent Ver en el mapa Coste total Sin datos Universitat Osnabruck Alemania Aportación de la UE Sin datos Dirección Barbarastra?e 7 49069 Osnabruck Ver en el mapa Coste total Sin datos
