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- 2022
Local structure of amorphous (GeTe)x(Sb2Te3) films
Marchenko 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
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: ppseregin@mail.ru
By the method of Messbauer spectroscopy on the isotope 119Sn, it was shown that tetravalent germanium atoms in amorphous films (GeTe)x(Sb2Te3) (where x=0.5, 1, 2, 3) form a tetrahedral system of chemical bonds, and in their local environment there are mainly tellurium atoms. In crystalline films (GeTe)x(Sb2Te3) is divalent hexoordinated germanium at positions 4 b of the NaCl type crystal lattice. By the meth-od of Messbauer spectroscopy on 121Sb and 125Te atoms, it was shown that the amorphization of (GeTe)x(Sb2Te3) films does not change the lo-cal environment of antimony and tellurium atoms Keywords: amorphous films, phase memory, Messbauer spectroscopy.
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