Raman scattering from vibrational and electronic excitations in a II-VI quaternary compound: ${\mathrm{Cd}}_{1\mathrm{-}\mathit{x}\mathrm{-}\mathit{y}}$${\mathrm{Zn}}_{\mathit{x}}$${\mathrm{Mn}}_{\mathit{y}}$Te

The Raman scattering in a II-VI quaternary compound (${\mathrm{Cd}}_{1\mathrm{-}\mathit{x}\mathrm{-}\mathit{y}}$ ${\mathrm{Zn}}_{\mathit{x}}$ ${\mathrm{Mn}}_{\mathit{y}}$Te) exhibits zone-center optical phonons whose frequencies vary with composition in a manner amenable to an extension of the modified random-element isodisplacement model. As a member of diluted magnetic semiconductors, ${\mathrm{Cd}}_{1\mathrm{-}\mathit{x}\mathrm{-}\mathit{y}}$ ${\mathrm{Zn}}_{\mathit{x}}$ ${\mathrm{Mn}}_{\mathit{y}}$Te exhibits the characteristic large magnetic-field-dependent redshift of the excitonic photoluminescence, the Raman-electron paramagnetic resonance of ${\mathrm{Mn}}^{2+}$, and an evidence of the Raman-antiferromagnetic resonance.