Publication detail

Enthalpic relaxation in Ge2Sb2Se5 glass

Authors: Svoboda Roman | Honcová Pavla | Málek Jiří

Year: 2012

Type of publication: článek v odborném periodiku

Name of source: Journal of Non-Crystalline Solids

Publisher name: Elsevier Science BV

Place: Amsterdam

Page from-to: 804-809

Titles:

Language	Name	Abstract	Keywords
cze	Ental.pická relaxace ve skelném Ge2Sb2Se5	Entalpická strukturní relaxace Ge2Sb2Se5 byla studována pomocí DSC. Na relaxační chování byl aplikován TNM model. Křivkový fit ukázal významnou závislost na experimentálních podmínkách. Všechny parametry byly diskutovány.	entalpická relaxace; DSC; TNM model; Ge-Sb-Se systém
eng	Enthalpic relaxation in Ge2Sb2Se5 glass	Differential scanning calorimetry measurements were used to study enthalpic structural relaxation of Ge2Sb2Se5 glass. The Tool-Narayanaswamy-Moynihan (TNM) model was applied to describe the relaxation behavior. The curve-fitting results showed a significant dependence on experimental conditions, true values of the TNM parameters needed to be confirmed by the alternative non-fitting methods - apparent activation energy was confirmed by evaluations from classic and intrinsic cycles, the non-linearity parameter was determined on the basis of peak-shift method. Discussion on the origin of the trend in curve-fitting results was conducted in terms of influence of either the nonlinear C-p-T dependence or anomalous relaxation behavior of the material itself. For the latter case a suggestion regarding the proceeding molecular mechanisms was made.	enthalpic relaxation; DSC; TNM model; Ge-Sb-Se system

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