Speaker
Pál Jóvári
(MTA Wigner FK)
Description
Te-rich amorphous Ge-Sb-Te alloys were investigated by diffraction techniques and EXAFS. Structural models were obtained by fitting all datasets (5 for each sample) simultaneously. The results showed that the alloys are chemically ordered (number of heteronuclear bonds maximized) and obey the 8-N rule. An overview of literature data shows a strong correlation between the glass transition temperature of amorphous tellurides and their average coordination number. The Ge-Sb-Te alloys investigated fit remarkably well in this trend.
Primary author
Pál Jóvári
(MTA Wigner FK)
