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Electric field control of magnetization dynamics in ZnMnSe/ZnBeSe diluted-magnetic-semiconductor heterostructures

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6 Author(s)
Kneip, M.K. ; Experimentelle Physik II, Universität Dortmund, D-44221 Dortmund, Germany ; Yakovlev, D.R. ; Bayer, M. ; Slobodskyy, T.
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We show that the magnetization dynamics in diluted magnetic semiconductors can be controlled separately from the static magnetization by means of an electric field. The spin-lattice relaxation (SLR) time of magnetic Mn2+ ions was tuned by two orders of magnitude by a gate voltage applied to n-type modulation-doped (Zn,Mn)Se/(Zn,Be)Se quantum wells. The effect is based on providing an additional channel for SLR by a two-dimensional electron gas (2DEG). The static magnetization responsible for the giant Zeeman spin splitting of excitons was not influenced by the 2DEG density.

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Applied Physics Letters  (Volume:88 ,  Issue: 21 )