Preparation and investigation of Ga5[GeSx]85I10 glasses

The Ga5[GeSx]85I10 glasses with x = 1.5, 1.7, 2.0, 2.3 and 2.6 are prepared; their thermal and optical properties and stability against crystallization are investigated. The values of glass transition temperature, energy bandgap and volume fraction of crystalline phase in glasses after annealing have nonmonotonic dependence on the macro-composition with a maximum value at x = 2.0. In the DSC curves of glasses with x = 2.0, 2.3 and 2.6, two glass transition temperatures are registered. The glass samples containing 1.2 ppm(at) hydrogen impurity in the form of SH-group and < 1 ppm(at) oxygen impurity in the form of GeO were produced.