Nature of the local environment of germany atoms in amorphous films (GeTe)x(Sb2Te3)
Marchtnko A.V. 1, Terukov E.I.2,3, Nasredinov F.S. 4, Petrushin Yu.A. 1, Seregin P.P. 1
1Herzen State Pedagogical University of Russia, St. Petersburg, Russia
2Ioffe Institute, St. Petersburg, Russia
3St. Petersburg State Electrotechnical University “LETI", St. Petersburg, Russia
4Peter the Great Saint-Petersburg Polytechnic University, St. Petersburg, Russia
Email: al7140@mail.ru, nasfas@mail.ru, uraordie@mail.ru, ppseregin@mailru

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Using Messbauer spectroscopy on 119Sn impurity atoms, it was demonstrated that in amorphous (GeTe)x(Sb2Te3) films (where x=0.5, 1, 2, 3) tin atoms replace atoms of tetravalent germanium, which forms a tetrahedral system of chemical bonds with atoms in its local environment. In crystalline films, tin replaces divalent six-coordinated germanium in positions 4b of the NaCl-type crystal lattice. Keywords: amorphous films, phase memory, Messbauer spectroscopy.
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