Laser induced ultrafast demagnetization in diluted magnetic semiconductor nanostructures

Omar Morandi; P.-A. Hervieux; Giovanni Manfredi

hal-00603705, version 1

Laser induced ultrafast demagnetization in diluted magnetic semiconductor nanostructures

Omar Morandi ¹, P.-A. Hervieux ², Giovanni Manfredi () ²

The European Physical Journal D 52, 1-3 (2009) 155-158

Résumé : We present a dynamical model that reproduces the observed time evolution of the magnetization in diluted magnetic semiconductor films after weak laser excitation. Based on a many-particle expansion of the exact p-d exchange interaction, our approach goes beyond the usual mean-field approximation. Numerical results demonstrate that the hole spin relaxation plays a crucial role for explaining the ultrafast demagnetization processes observed experimentally. The influence of the laser power on the magnetization dynamics is also investigated.

1 : CALVI (INRIA Nancy - Grand Est / IECN / LSIIT / IRMA)
CNRS : UMR7005 – INRIA – Université de Strasbourg – Université de Lorraine
2 : Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)
Université de Strasbourg – CNRS : UMR7504

Collaboration : CALVI

hal-00603705, version 1
http://hal.archives-ouvertes.fr/hal-00603705
oai:hal.archives-ouvertes.fr:hal-00603705
Contributeur : Giovanni Manfredi <>
Soumis le : Lundi 27 Juin 2011, 10:36:49
Dernière modification le : Lundi 27 Juin 2011, 10:36:49

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DOI : 10.1140/epjd/e2008-00281-1

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