R. P. Wang, S. J. Madden, C. J. Zha, A. V. Rode, B. Luther-Davies

Annealing induced phase transformations in amorphous As₂S₃ films

Journal of Applied Physics 100 (2006) 063524

Amorphous arsenic sulphide (As₂S₃) films prepared by ultrafast pulsed laser deposition have been vacuum annealed at a range of different temperatures. Measurements of the glass transition temperature indicate that a crystallization process initiates at annealing temperatures around 170 °C. In combination with Raman scattering analysis, we conclude that phase separation is intrinsic for our as-deposited films. During annealing two sorts of phase transformation are identified: one between different amorphous polymorphs, and another from the amorphous to a crystalline state. We point out a correlation between these two types of transformation and two characteristic time scales identified from measurements of the relaxation of the refractive index, and explain the Arrhenius and non-Arrhenius behaviors leading to the observed temporal characteristics.

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Cited Articles

1. Ohlídal I., Franta D., Frumar M., Jedelský J., Omasta J.,
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