Characterization of Ag-Ge-Se bulk glasses by means of Mössbauer effect on 57Fe and 119Sn atomic nuclei

ARCONDO, B.; MARIA ANDREA UREÑA; CONDE GARRIDO, J. M.; ROCCA, J.; FONTANA, M.

Viena, Austria

Conferencia; International Conference on the Applications of the Mössbauer Effect (ICAME09); 2009

Institute of Solid State Physics, TU Wien, Wiedner Hauptstrasse 8-10, A 1040 Wien, Austria

In this work, the structure of Fe and Sn doped Agx(Ge0.25Se0.75)100-x (x=0 to 25 at.%) intrinsically inhomogeneous glasses is analyzed employing 119mSn and 57Fe Mössbauer spectroscopy, X-ray diffractometry and scanning electron microscopy. 119mSn enters in the glass as a substitutional impurity for Ge whereas 57Fe enters as an interstitial impurity. Mössbauer spectra obtained with 119mSnO3Ca source, from samples containing about 1% 119Sn for Ge, reveal that the local order of Ge in both amorphous phases is basically the same whereas Mössbauer spectra obtained with 57Fe(Rh) source, from samples containing about 0.5% 57Fe, evidence the differences between both phases.