Kinetic fragility of Se-based binary chalcogenide glasses

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F15%3A39899431" target="_blank" >RIV/00216275:25310/15:39899431 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2015.03.041" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2015.03.041</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2015.03.041" target="_blank" >10.1016/j.jnoncrysol.2015.03.041</a>

Result language
angličtina
Original language name
Kinetic fragility of Se-based binary chalcogenide glasses
Original language description
Kinetic fragility was determined for a number of compositions from the Ge-Se, As-Se and Te-Se chalcogenide glassy systems. Values of fragility indices were evaluated from both viscosity and enthalpy relaxation data. Comparison of the viscosity and enthalpy fragilities shows marked decoupling in cases of low-Ge/As-content compositions and the whole Te-Se glassy system. A possible explanation regarding the increased viscosity fragilities involves the influence of dynamic structural heterogeneity (densityfluctuations and clustering of structural elements) on shear viscosity in the glass transition region. In particular, the observed decoupling seems to occur in case of the materials exhibiting moderate-to-high activation energy of relaxation processes and large structural cooperativity. The origin of the fragility decoupling may lie either in different molecular movements being involved in the two processes (viscous flow versus structural relaxation) or in their different manifestation i
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
<a href="/en/project/GAP106%2F11%2F1152" target="_blank" >GAP106/11/1152: Reversible crystallization and structural relaxation in amorphous materials used for phase change recording</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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