Abstract
ABSTRACT Shear moduli for (As2Se3)1-yGey (As2Se3)1-y(Ge2Se3)y glasses have been calculated by the linear combination of atomic orbitals method. Linear thermal expansion coefficients for As2Se3, (As2Se3)o.9Geo.I, (As2Se3)o.7Geo.3 and Ge33As125e55 films have been derived from thermal stress measurements. Correlation betweentheoretical and experimental thermal stress values for amorphous films has been made. The availability of the totalstress minimization in multilayer structures based on the films under consideration has been shown.Keywords: thin amorphous films, thermal stress, linear thermal expansion coefficient, Young's modulus,multinary chalcogenide semiconductors INTRODUCTION One of the prospective lines for chalcogenide glasses application is the design of IR optical coatings on their base.Thermal stress resulted from the difference in linear thermal expansion coefficients between coating and substrate is considered to be the main reason for the failure of optical coatings under their heating or cooling. In comparisonwith the other materials used for JR optical coatings chalcogenide glasses have low Young's modulus values and
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