Local Structure of Amorphous and Crystalline Ge2Sb2Te5 Films.

It is shown using Mössbauer spectroscopy on ¹¹⁹Sn, ¹²¹Sb, and ¹²⁵Te isotopes that the local structure of germanium atoms changes during crystallization of amorphous Ge₂Sb₂Te₅ films (tetrahedral symmetry changes to the octahedral one), whereas the environment of antimony and tellurium atoms remains the same (the environment of antimony atoms it close to that in the Sb₂Te₃ compound). [ABSTRACT FROM AUTHOR]