We report on a Raman study of lattice vibrations in the diluted magnetic semiconductors Zn1-xFexSe (0<x<0.64) and Zn1-xCoxSe (0<x<0.10). Both alloys possess a homogeneous crystal phase having the zinc-blende structure. The observed dependence of the first-order optical-phonon spectrum on x follows the mixed-mode behavior and is well described by the modified random-element isodisplacement model. Several physical parameters for the end members, cubic FeSe and CoSe, are deduced from the fits to the composition dependence of the lattice vibrations.
ASJC Scopus subject areas
- Condensed Matter Physics