Microstructural probing of (1−x) GeS_2−x Ga₂S₃ system glasses by Raman scattering

Abstract

Raman scattering measurement of (1−x) GeS_2−xGa₂S₃ system glasses was conducted in order to understand the microstructural change caused by the addition of Ga₂S₃. According to the change of Raman spectra with the addition of Ga₂S₃, two main structural transformations were deduced: the gradual enhancement of ethane-like structural units S₃Ge−GeS₃ (250 cm⁻¹) and S₃ Ga−GaS₃ (270 cm⁻¹) and the appearance of charge ambalanced units [Ga₂S₂(S_1/2)₄]²⁻ and [Ga(S_1/2)₄]⁻ And this change of structural aspect seems to give us a clue to understanding the cause of the increased rare-earth solubility.

Keywords

(1−x)GeS_2−xGa₂S₃ system glasses / Raman / microstructure

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