Microscopic local bonding and optically-induced switching for Ge2Sb2Te5 alloys: A tale of four pseudo-binary and three binary tie-lines in Ge-Sb-Te phase field

Ge 2 Sb 2 Te 5 (GST‐225) has emerged as an active medium for applications in reversible, ReWritable (RW) optical memory discs. Many studies have focused on the properties of this alloy, relative to the other GST compositions on tie‐lines in the Ge‐Sb‐Te ternary phase field; (i) Sb 2 Te to GeTe 2 : (ii) Sb 2 Te 3 : to GeTe; (iii) GeSb to Te: and (iv) the truncated tie‐line from GST‐124 to Sb. This article focuses instead on the binary atomic...