Influence of reduced mass differences on the Raman spectra of ternary mixed compounds:: Zn1-xFexS and Zn1-xMnxS -: art. no. 054303

A Raman scattering study of the mixed crystals Zn1-xFexS and Zn1-yMnyS has been carried out for different Fe (0less than or equal toxless than or equal to0.05) and Mn (0less than or equal toyless than or equal to0.5) concentrations. It is found that both the strengths and the frequencies of the TO and LO modes of ZnS are approximately independent of the Mn (or Fe) concentration. However, as Mn (or Fe) is substituted for Zn, four additional first-order modes with frequencies omega(TO)