Partial density of Mn 3d states and exchange-splitting changes in ${\mathrm{Zn}}_{1\mathrm{-}\mathit{x}}$${\mathrm{Mn}}_{\mathit{x}}$Y (Y=S,Se,Te)

Mn 3d states in ${\mathrm{Zn}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{Mn}}_{\mathit{x}}$Y (Y=S,Se,Te) have been investigated using resonant synchrotron-radiation photoemission at the Mn 3p-3d threshold. We observe chemical trends due to anion substitution for the main Mn 3d photoemission feature at 3.5, 3.6, and 3.8 eV below the valence-band maximum as well as for the d(↑)-d(↓) exchange splitting for ${\mathrm{Zn}}_{0.81}$ ${\mathrm{Mn}}_{0.19}$S, ${\mathrm{Zn}}_{0.81}$ ${\mathrm{Mn}}_{0.19}$Se, and ${\mathrm{Zn}}_{0.68}$ ${\mathrm{Mn}}_{0.32}$Te, respectively. The size of relaxation effects associated with the resonant-photoemission process is derived. Valence-band offsets of 0.3 eV are found between the semimagnetic Zn compounds and their parent binary alloys.