Magnetization dynamics down to a zero field in dilute (Cd,Mn)Te quantum wells.
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.
Goryca
M
M
Institute of Experimental Physics, University of Warsaw, Hoza 69, PL-00-681 Warszawa, Poland. mgoryca@fuw.edu.pl
Ferrand
D
D
Kossacki
P
P
Nawrocki
M
M
Pacuski
W
W
Maślana
W
W
Gaj
J A
JA
Tatarenko
S
S
Cibert
J
J
Wojtowicz
T
T
Karczewski
G
G