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Temperature independence of pressure-induced amorphization of the phase-change memory alloy Ge2Sb2Te5 
Auteur(s): Krbal Milos, Kolobov Alex, Haines Julien, Annie Pradel, Michel Ribes, Paul Fons, Tominaga J., Levelut C., Le Parc R., Hanfland Michael
(Article) Publié:
Applied Physics Letters, vol. 93 p.031918 (2008)
Ref HAL: hal-00341455_v1
DOI: 10.1063/1.2956409
WoS: 000257968700035
Exporter : BibTex | endNote
29 Citations
Résumé: n the temperature range from room temperature to about 150 °C, the prototypic phase-change material Ge2Sb2Te5 becomes amorphous upon hydrostatic compression. In the studied temperature range, the onset of amorphization is at about 15 GPa and the material completely amorphizes at 25 GPa; these values do not depend on temperature. Upon decompression, the amorphous phase is stable at lower temperatures, yet at higher temperatures (145 °C), the initial fcc phase is recovered upon decompression. A possible mechanism of pressure-induced amorphization and its implications for phase-change memories are discussed.
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