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Published on: July 3, 2015
Magnetization dynamics down to a zero field in dilute (Cd,Mn)Te quantum wells
M Goryca1, D Ferrand, P Kossacki
1Institute of Experimental Physics, University of Warsaw, Hoza 69, PL-00-681 Warszawa, Poland. mgoryca@fuw.edu.pl
Abstract:
The evolution of the magnetization in (Cd,Mn)Te quantum wells after a short pulse of magnetic field was determined from the giant Zeeman shift of spectroscopic lines. The dynamics in the absence of a static magnetic field was found to be up to 3 orders of magnitude faster than that at 1 T. Hyperfine interaction and strain are mainly responsible for the fast decay. The influence of a hole gas is clearly visible: at zero field anisotropic holes stabilize the system of Mn ions, while in a magnetic field of 1 T they are known to speed up the decay by opening an additional relaxation channel.
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