Local Structure and Anti-Structural Defects of Tin in Amorphous and Crystalline Ge2Sb2Te5 Films

Abstract

The absorption Mössbauer spectroscopy on 119Sn impurity centers shows that germanium atoms in the structure of amorphous and polycrystalline Ge2Sb2Te5 films have different local symmetries (tetrahedral in the amorphous phase and octahedral in the crystalline). By emission Mössbauer spectroscopy on 119mSn impurity centers formed after the radioactive decay of 119Sb or 119mTe parent atoms, tin antisite defects at antimony and tellurium sites of crystalline Ge2Sb2Te5 films are identified.

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Correspondence to P. P. Seregin.

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Translated by M. Tagirdzhanov

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Marchenko, A.V., Terukov, E.I., Nasredinov, F.S. et al. Local Structure and Anti-Structural Defects of Tin in Amorphous and Crystalline Ge2Sb2Te5 Films. Semiconductors 55, 1–6 (2021). https://doi.org/10.1134/S1063782621010127

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Keywords:

  • anti-structural defects
  • Mössbauer spectroscopy
  • Ge2Sb2Te5