RIGIDITY PERCOLATION AND CHEMICAL ORDERING IN GE-IN-SE GLASSES

Autor(en): SAFFARINI, G
SCHLIEPER, A
Stichwörter: DENSITY; GEXSE100-X; MICROHARDNESS; NETWORK; Physics; Physics, Condensed Matter; SYSTEMS
Erscheinungsdatum: 1995
Herausgeber: AKADEMIE VERLAG GMBH
Journal: PHYSICA STATUS SOLIDI B-BASIC RESEARCH
Volumen: 191
Ausgabe: 2
Startseite: 243
Seitenende: 247
Zusammenfassung: 
The dependence of the mean atomic volume V-a of chalcogenide glasses belonging to the GexIn6Se94-x and GexIn12Se88-x families of the Ge-In-Se system, on the average coordination number Z is investigated. The V-a-Z plots for both families display maxima at Z = 2.75 and 2.83 corresponding to the tie-line composition in In-6 and In-12 families, respectively. The V-a-Z dependence for the In-6 family exhibits a minimum at Z = 2.54 and a broad local maximum at Z = 2.67, and that of the In-12 family shows a marked change in slope at Z = 2.50. These results are discussed in the framework of the chemically ordered covalent network model, Tanaka's model of topological transition, and the Phillips-Thorpe model of rigidity percolation.
ISSN: 03701972
DOI: 10.1002/pssb.2221910202

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