Raman scattering by magnetic excitations and phonons in diluted magnetic structures formed by self-organized quantum disks of CdZn(Mn)Se in a Zn(Mn)Se matrix - art. no. 035303

Photoluminescence and resonant Raman scattering by magnetic excitations and optical phonons were studied in diluted magnetic structures that consisted of nominally two monolayer depositions of CdSe between ZnSe barriers. Mn w as incorporated either into the CdSe layers or into the barriers. self-orga nized quantum islands of composition CdZnSe are formed in the "well" layers during growth. Luminescence bands of excitons localized at the islands sho wed under applied magnetic fields strong effects of s,p-d exchange interact ion of band carriers with Mn2+ ions. Different types of magnetic excitation were observed in resonant Raman scattering spectra, such as spin-flip scat tering of the donor-bound magnetic polarons at the CdZnSe islands, Raman tr ansitions between ground and first excited states of antiferromagnetically coupled nearest neighbor Mn2+ ions, and collective multiple spin-flip Raman scattering within a Zeeman split Mn2+ ground state. The Raman spectra of o ptical phonons were studied under resonance and off-resonance excitation.