Abstract
Dynamics of spin-lattice relaxation of magnetic Mn ions in semimagnetic quantum wells containing two-dimensional electron gas (2DEG) has been studied by means of an optical detection of injected nonequilibrium phonons. It is found that the spin-lattice relaxation rate is an increasing function of electron concentration and electron temperature. The 2DEG provides an effective channel for the energy transfer from magnetic ions to the lattice. A model accounting for the spin-flip transitions between Mn ions and free electrons describes well our experimental results in a qualitative manner.
- Received 2 March 2001
DOI:https://doi.org/10.1103/PhysRevB.64.155205
©2001 American Physical Society