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LOW-TEMPERATURE THERMAL PROPERTIES OF Ge-As-S GLASSES

E. Vateva1,* , B. Terziyska1, H. Misiorek2, A. Jeowski2, D. Wlosewicz2, D. Arsova1

Affiliation

  1. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
  2. Institute for Low Temperatures and Structure Research, Polish Academy of Sciences, 2 Okolna str. 50-422 Wroclaw, Poland

Abstract

A parallel study of the low-temperature specific heat, Cp and thermal conductivity, k, of GexAs40-xS60 glasses is carried out. A comparison with our previous results concerning the compositional dependences of other thermal properties is made. A new scaling law for the parameters of the Cp/T3 peak is established, and a relation between the temperature dependence of the calculated thermal diffusivity with a parameter characterizing the plateau of k is established. A correlation between the fragility of the studied glasses and the parameters of the low temperature thermal properties is found, based on the influence of the excess quasi-localized vibrational excitations in a defined temperature range..

Keywords

Chalcogenides, Specific heat, Thermal conductivity, Diffusivity, Ge-As-S glass.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

E. Vateva, B. Terziyska, H. Misiorek, A. Jeowski, D. Wlosewicz, D. Arsova, LOW-TEMPERATURE THERMAL PROPERTIES OF Ge-As-S GLASSES, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 357-360 (2005)