The study of the glass transitions in a Ge 0.033As 0.033Se 0.934 glass

The glass transition has been studied in the ternary systems Ge x/2 As x/2 Se (1− x) , in which the properties of the glass can be tuned from fragile to strong by changing x. In the present work we report on neutron inelastic scattering measurements of Ge x/2 As x/2 Se (1− x) for x = 0.066. This gla...

Full description

Saved in:
Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 234; pp. 421 - 423
Main Authors Russina, M., Mezei, F., Miekeley, W., Rönnfeld, W., Lechner, R.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1997
Subjects
Amorphous materials
Glass transitions
Glasses
Mode coupling
Mode coupling
Glass transitions
Glasses
Amorphous materials
Online AccessGet full text

Cover

More Information
Summary:The glass transition has been studied in the ternary systems Ge x/2 As x/2 Se (1− x) , in which the properties of the glass can be tuned from fragile to strong by changing x. In the present work we report on neutron inelastic scattering measurements of Ge x/2 As x/2 Se (1− x) for x = 0.066. This glass former falls into the category of the so-called fragile glasses. The characteristic dynamic behavior, also observed in other fragile glasses, is primarily characterised by the onset of marked anharmonicity in the low energy spectrum above the glass transition temperature T g. These anharmonic processes have been identified with the fast β-relaxation processes, predicted by the mode-coupling theory (MCT). The Q and temperature dependence of the elastic and quasielastic neutron scattering provide information about special features of the glass transition and intermediate range order in this system.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(96)01051-4