Abstract
The photoluminescene signal of individual semimagnetic CdSe/Zn 0.75Mn0.25Se quantum dots is used to study the magnetization of the Mn2+ spin system in the exchange field of a single exciton. We demonstrate that by increasing the laser excitation power a significant blue shift of the photoluminescence signal occurs. This is attributed to a laser-induced demagnetization, i.e. the laser-generated carriers heat the Mn2+ spin system via spin-flip exchange scattering.
Original language | English |
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Pages (from-to) | 379-382 |
Number of pages | 4 |
Journal | Journal of Superconductivity and Novel Magnetism |
Volume | 16 |
Issue number | 2 |
Publication status | Published - 2003 |
Externally published | Yes |
Keywords
- Diluted magnetic semiconductors
- Exciton magnetic polaron
- Nanomagnetism
- Quantum dots
- Spin heating
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics