Anharmonicity of thermal vibrations and grüneisen parameter of chalcogenide glasses in the Ge-As-S system within the approximation of the free volume concept

Autor:	V. I. Fedelesh, I. M. Yurkin, T. N. Mel'nichenko, T. D. Mel'nichenko
Rok vydání:	2000
Předmět:	Chalcogenide Anharmonicity Thermodynamics Mineralogy Grüneisen parameter Condensed Matter Physics Vibration Chalcogen chemistry.chemical_compound chemistry Molecular vibration Lattice (order) Thermal Materials Chemistry Ceramics and Composites
Zdroj:	Glass Physics and Chemistry. 26:397-403
ISSN:	1608-313X 1087-6596
DOI:	10.1007/bf02732057
Popis:	The Gruneisen parameter and the ultimate strain of “bond breaking” at the ultimate elongation of interparticle bonds have been calculated. The Gruneisen parameters determined from different formulas are compared. It is demonstrated that the volume deformation required to form a microvoid in the glass network only slightly depends on glass composition. The microvoid volume is determined primarily by the ultimate strain of the interatomic bond. In chalcogenide glasses, the ultimate strain of the interatomic bond is governed by the limiting displacement of a bridging chalcogen atom, which varies in inverse proportion to the lattice Gruneisen parameter. The role of the Gruneisen parameter in the fluctuation free volume and soft configuration models is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8d2d5e705319ccbdfdf5534200c1b162 https://doi.org/10.1007/bf02732057 Zobrazit plný text záznamu Full text from SpringerLink