Magneto-optical properties of the diluted magnetic semiconductor pp-type ZnMnO

We present a magneto-optical study of pp-type Zn1−xMnxO diluted magnetic semiconductors (DMS) obtained by thermal oxidation Zn1−xMnxTe layers. Photoluminescence spectra were used to determine the “giant” Zeeman splitting and to estimate the exchange integrals N0(α−β)∼0.1 eV. This is an extremely small value for a II–VI DMS, and we discuss possible reasons for this effect.