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...
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Published in | Physica. B, Condensed matter Vol. 234; pp. 421 - 423 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
1997
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Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0921-4526 1873-2135 |
DOI: | 10.1016/S0921-4526(96)01051-4 |