Identification of Te alloys with suitable phase change characteristics

Detemple, Ralf; Wamwangi, Daniel; Wuttig, Matthias; Bihlmayer, Gustav
September 2003
Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2572
Academic Journal
At present, the discovery and development of phase change materials is mainly based upon empirical strategies and trial and error approaches. Here, we present a structural criterion that needs to be met to enable the mandatory fast recrystallization with sufficient optical contrast that characterizes suitable phase change materials. Comparing the behavior of AgInTe[sub 2] and AgSbTe[sub 2] films it is demonstrated that only the AgSbTe[sub 2] films, which show a cubic coordination, have sufficient density contrast, and hence, also optical contrast to allow phase change recording. © 2003 American Institute of Physics.


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