Cel Nanoparticles are small systems with challenging physical properties such as slow exponential relaxation at low temperatures (relaxation times extending up to geological time scales) and superparamagnetism (where the relaxation time may be of the order of picoseconds) at high temperatures. From a technological point of view, they have applications in magnetic storage of information. In order to reach high storage densities very small particles are needed. However, in small nanoparticles thermal fluctuations of magnetization and surface effects become of great importance as they dominate the magnetic properties, which control the relaxation time and therefore the stability of the information stored. Therefore, one of the ultimate goals of theoretical as well as experimental studies on nanoparticles, in view of technological applications, consists in dealing with the various effects (thermal, surface, inter-particle interactions) on the relaxation time of the particle magnetization.In this project, we would like to investigate these effects by using microscopic approaches. First, the approach to solve the underlying stochastic Langevin equation for the magnetization (e.g. Gilbert's equation augmented by a random field term) developed in previous works of the participants of this project will be the basis for further extensions and generalizations. Second, the relaxation rate for nanoparticles will be calculated using Langer's kinetic theory and Monte-Carlo simulations. This work will be useful to interpret the experimental results for the magnetic relaxation of nanoparticles and will have great technological implications. Program(-y) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Temat(-y) 1B - Condensed Matter, Optics and Plasma Physics OPEN - OPEN Call Zaproszenie do składania wniosków Data not available System finansowania Data not available Koordynator University of Dublin Wkład UE Brak danych Adres 2 Dublin Irlandia Zobacz na mapie Koszt całkowity Brak danych Uczestnicy (5) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko Queen's University of Belfast Zjednoczone Królestwo Wkład UE Brak danych Adres BT7 1NN Belfast Zobacz na mapie Koszt całkowity Brak danych Russian Academy of Sciences Rosja Wkład UE Brak danych Adres Vvedenskogo sq. 1 141190 Fryazino, Moscow region Zobacz na mapie Koszt całkowity Brak danych Université de Perpignan Francja Wkład UE Brak danych Adres 52, Avenue de Villeneuve 66860 Perpignan Zobacz na mapie Koszt całkowity Brak danych Université de Versailles St. Quentin Francja Wkład UE Brak danych Adres 78035 Versailles Zobacz na mapie Koszt całkowity Brak danych Ural Branch of the Russian Academy of Sciences Rosja Wkład UE Brak danych Adres 1 Korolev street 614013 Perm Zobacz na mapie Koszt całkowity Brak danych
