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![[Figure 5]](cn5034fig5mag.jpg)
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Figure 5
Temperature dependence of the distances and coordination numbers at the Ge edge (left) and at the Sb edge (right) together with the calorimetric signal measured for the (Ge15Sb85)Sb sample (center). Note that for better legibility only every tenth point is shown with an error bar. At the first exothermal transition an exchange of bonds can be observed at the Ge edge: the number of Ge—Sb bonds is reduced while the number of Ge—Ge bonds increases. This trend is compatible only with a phase separation. This transition continues upon further heating the sample, until the second transition where the Ge—Ge bond length is reduced to that of crystalline Ge in the diamond structure (A4). This behavior shows that amorphous Ge is segregated at the first transition, and subsequently crystallizes at higher temperatures. |
![[Figure 5]](cn5034fig5.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
