Antistructural Defects in Ge–Te, As–Te, and Ge–As–Te Vitreous Alloys

Abstract

Emission Mossbauer spectroscopy on 119mmSn(119mSn), 119Sb(119mSn), 119mTe(119mSn), 125mTe(125Te), 125Sb(125Te), 125Sn(125Te), and 129mTe(129I) isotopes is used as a method for the creation and identification of antistructural defects in Ge20Te80, As30Te70, and Ge15As4Te81 vitreous alloys in forms of tin atoms in tellurium and arsenic positions, as well as tellurium atoms in germanium and arsenic positions. Tin atoms in the positions of arsenic and tellurium, and tellurium atoms in the positions of germanium and arsenic rearrange their local environment, while the symmetry of the local environment of germanium positions remains unchanged in the case of their isovalent replacement by tin atoms.