Neutron thermodiffractometry study of silver chalcogenide glasses

Andrea Piarristeguy (1) , Gabriel Cuello (2) , Bibiana Arcondo (3) , Annie Pradel (1) , Michel Mr Ribes (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 ILL - Institut Laue-Langevin
3 Laboratorio de Sólidos Amorfos [Buenos Aires]

Silver-containing chalcogenide glasses are of considerable interest for applications in optical and electrical recordings and as solid electrolytes. Therefore, insight in their structural properties is important. A neutron thermodiffraction study of Agx(Ge0.25Se0.75)100-x glasses with x = 15 and 25 at.% was carried out. The amorphous samples were heated in situ from room temperature up to 350 °C, while the neutron diffraction spectra were collected every degree. For both glasses the Ag8GeSe6 phase appeared first, followed by the crystallization of GeSe2. The crystallization process for the Ag-rich glass was more complex with the appearance of a non-identified third phase. Rietveld refinement helped us in studying the evolution of the lattice constants of each phase upon heating.

Mots clés: neutron diffraction/scattering; chalcogenides

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Andrea Piarristeguy, Gabriel Cuello, Bibiana Arcondo, Annie Pradel, Michel Mr Ribes. Neutron thermodiffractometry study of silver chalcogenide glasses. Journal of Non-Crystalline Solids, 2007, 353, pp.1243. ⟨10.1016/j.jnoncrysol.2006.09.060⟩. ⟨hal-00163036⟩