Ultra-Fast Spin Dynamics in Diluted Magnetic Semiconductors
Z. Wilamowski, R. Buczko, G. Karczewski
Institute of Physics, Polish Academy of Sciences, Al. Lotnik├│w 32/46, 02-668 Warszawa, Poland

and W. Jantsch
Johannes Kepler Universit├Ąt, 4040-Linz, Austria
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In nano-size antiferromagnetic systems a spatially inhomogeneous field leads to the formation of a staggered magnetization. Thereby the total magnetic moment does not change but the formation of a net magnetic moment at the border of the cluster leads to an energy gain. This type of magnetism is characterised by an ultra-fast dynamics. We suggest it is also responsible for the formation of the exciton magnetic polaron.
DOI: 10.12693/APhysPolA.90.969
PACS numbers: 75.10.Jm, 75.50.-y