Temperature Dependent Raman Scattering Study on Linbo₃:Zn Crystals

Abstract

In this paper the results of a Raman study on LiNbO₃:Zn crystals are presented. It is found that the symmetry, distribution and relative intensities of the vibrational modes show few changes, as compared to the results of pure LiNbO₃ crystals. Some vibrational modes are coupled to each other by doping ZnO into LiNbO₃ crystals, and the coupling effects disappear gradually with the decrease of temperature. It is suggested that LiNbO₃:Zn is substitute solution and the doped Zn ions substitute for the Nb_Li first and then the Li ions. The observed vibrational modes in LiNbO₃ crystals are mainly determined by the oxygen octahedra.

Key Words:

• Raman scattering
• LiNbO₃:Zn
• Doping effect