Groupe de Physique Statistique

Equipe 106, Institut Jean Lamour

                     
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Séminaire de groupe

Magnetization Dynamics in Nanostructures
Omar Morandi
jeudi 04 avril 2013 , 14h00
Salle de séminaire du groupe de Physique Statistique

Ultrafast light-induced magnetization dynamics in ferromagnetic film and in Diluted Magnetic Semiconductors is today an active area of research. Ferromagnetic semiconductors are obtained by the substitution a small molar fraction of cations of a III-V semiconductor with high-spin ions. The magnetism can be efficiently modified by controlling the doping density or by excitation of electron–hole pairs with a laser pulse. We present a dynamical model that explains the time evolution of the magnetization in 2D diluted magnetic semiconductors. Based on the pseudo-fermion formalism and many-particle expansion the exchange interaction, our approach includes RKKY-like interactions and double-exchange mechanisms.

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