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Raman scattering and optical absorption edge studies
of CuInP2S6 and CuInP2(S0.95Se0.05)6
layered ferrielectrics
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Studenyak I.P. , Mitrovcij V.V., Stefanovich V.A., Kovacs Gy.Sh., Mykajlo
O.A., Gurzan M.I., Vysochanski Yu.M.
Raman scattering spectra at room temperatrure and optical absorption
edge spectra in the temperatrure range 77-373 K in CuInÐ2(S0.95Se0.05)6
crystal are investigated. The comparative analyzis of the obtained spectra
with the similar spectra for pure CuInÐ2S6 crystal
is performed. The anionic substitution of S atoms by Se results in the
red shift of the Urbach absorption edge, its additional smearing and sharp
decrease of the ferrielectric phase transition.
Key words: ferrielectric; phase transition; Raman scattering;
Urbach absorption edge
doi 10.3116/16091833/2/1/26/2001 |
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