Modeling of medium-range order in glasses

Dynamic simulations based on cooperative rearrangements of atoms in a dense system have been performed for model systems representing mixtures of two kinds of atoms, A and B, in both 2 and 3 dimensions. The atoms are considered as beads distributed on a lattice constituting a background coordination...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1998-07, Vol.232, p.619-626
Main Authors: Pakula, Tadeusz, Červinka, Ladislav
Format: Article
Language:English
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Summary:Dynamic simulations based on cooperative rearrangements of atoms in a dense system have been performed for model systems representing mixtures of two kinds of atoms, A and B, in both 2 and 3 dimensions. The atoms are considered as beads distributed on a lattice constituting a background coordination skeleton of the system. The beads of different type interact by attractive forces which are assumed to mimic interatomic bonds. Random distributions of atoms of different kinds have been observed at temperatures ( T → ∞), whereas, clusters with a medium range order have been detected at finite temperatures by means of changes in structure factors. These ordering effects have been studied under various conditions (temperature, composition and density) imposed on the simulated systems.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(98)00481-5