Structural investigations of ternary chalcogenide glasses

• Published in: Surface and interface analysis Vol. 36; no. 8; pp. 880 - 883
• Main Authors: Petkova, T., Petkov, P., Vassilev, S., Nedeva, Y.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.08.2004; Wiley
• Subjects: amorphous semiconductors; chalcogenide glasses; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; glassy structure; Physics; radial distribution curves; Gallium; Semiconductor materials; Radial distribution function; amorphous semiconductors; glassy structure; Glass structure; XRD; Amorphous state; Amorphous state structure; radial distribution curves; Chalcogenide glasses
• ISSN: 0142-2421; 1096-9918
• DOI: 10.1002/sia.1791

Glasses from (GeSe5)1−xGax and (GeSe4)1−xGax (x = 5, 10, 15, 20 at.%) systems have been investigated. X‐ray diffraction and IR scattering measurements have been carried out in order to elucidate the structure of the glasses. From the x‐ray diffraction data radial distribution functions (RDF) have been obtained. The results show that the basic units are tetrahedral and the atoms are distributed according to the ‘chemically ordering’ model. The IR spectra reveal that the introduction of gallium to GexSe1−x glass thus causes only a small shift of maxima and some changes in the broadness of the vibration bands. The presence of a shoulder at 216 cm−1 and the increase of this shoulder is associated with the increase in gallium content. The effect of gallium incorporation in the binary GexSe1−x glassy system has been discussed in terms of the chemically ordered model and experimental data of both investigations. Copyright © 2004 John Wiley & Sons, Ltd.