skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High-precision measurements of the compressibility of chalcogenide glasses at a hydrostatic pressure up to 9 GPa

Abstract

The volumes of glassy germanium chalcogenides GeSe{sub 2}, GeS{sub 2}, Ge{sub 17}Se{sub 83}, and Ge{sub 8}Se{sub 92} are precisely measured at a hydrostatic pressure up to 8.5 GPa. The stoichiometric GeSe{sub 2} and GeS{sub 2} glasses exhibit elastic behavior in the pressure range up to 3 GPa, and their bulk modulus decreases at pressures higher than 2–2.5 GPa. At higher pressures, inelastic relaxation processes begin and their intensity is proportional to the logarithm of time. The relaxation rate for the GeSe{sub 2} glasses has a pronounced maximum at 3.5–4.5 GPa, which indicates the existence of several parallel structural transformation mechanisms. The nonstoichiometric glasses exhibit a diffuse transformation and inelastic behavior at pressures above 1–2 GPa. The maximum relaxation rate in these glasses is significantly lower than that in the stoichiometric GeSe{sub 2} glasses. All glasses are characterized by the “loss of memory” of history: after relaxation at a fixed pressure, the further increase in the pressure returns the volume to the compression curve obtained without a stop for relaxation. After pressure release, the residual densification in the stoichiometric glasses is about 7% and that in the Ge{sub 17}Se{sub 83} glasses is 1.5%. The volume of the Ge{sub 8}Se{sub 92} glassmore » returns to its initial value within the limits of experimental error. As the pressure decreases, the effective bulk moduli of the Ge{sub 17}Se{sub 83} and Ge{sub 8}Se{sub 92} glasses coincide with the moduli after isobaric relaxation at the stage of increasing pressure, and the bulk modulus of the stoichiometric GeSe{sub 2} glass upon decreasing pressure noticeably exceeds the bulk modulus after isobaric relaxation at the stage of increasing pressure. Along with the reported data, our results can be used to draw conclusions regarding the diffuse transformations in glassy germanium chalcogenides during compression.« less

Authors:
 [1];  [2];  [1]
  1. Vereshchagin Institute of High-Pressure Physics (Russian Federation)
  2. Universite du Littoral, LPCA, UMR 8101 CNRS (France)
Publication Date:
OSTI Identifier:
22617205
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 123; Journal Issue: 2; Other Information: Copyright (c) 2016 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACCURACY; CHALCOGENIDES; COMPRESSIBILITY; COMPRESSION; ERRORS; GERMANIUM COMPOUNDS; GERMANIUM SELENIDES; GERMANIUM SULFIDES; GLASS; HYDROSTATICS; PRESSURE RANGE GIGA PA; PRESSURE RELEASE; RELAXATION; STOICHIOMETRY

Citation Formats

Brazhkin, V. V., E-mail: brazhkin@hppi.troitsk.ru, Bychkov, E., and Tsiok, O. B. High-precision measurements of the compressibility of chalcogenide glasses at a hydrostatic pressure up to 9 GPa. United States: N. p., 2016. Web. doi:10.1134/S1063776116060108.
Brazhkin, V. V., E-mail: brazhkin@hppi.troitsk.ru, Bychkov, E., & Tsiok, O. B. High-precision measurements of the compressibility of chalcogenide glasses at a hydrostatic pressure up to 9 GPa. United States. doi:10.1134/S1063776116060108.
Brazhkin, V. V., E-mail: brazhkin@hppi.troitsk.ru, Bychkov, E., and Tsiok, O. B. Mon . "High-precision measurements of the compressibility of chalcogenide glasses at a hydrostatic pressure up to 9 GPa". United States. doi:10.1134/S1063776116060108.
@article{osti_22617205,
title = {High-precision measurements of the compressibility of chalcogenide glasses at a hydrostatic pressure up to 9 GPa},
author = {Brazhkin, V. V., E-mail: brazhkin@hppi.troitsk.ru and Bychkov, E. and Tsiok, O. B.},
abstractNote = {The volumes of glassy germanium chalcogenides GeSe{sub 2}, GeS{sub 2}, Ge{sub 17}Se{sub 83}, and Ge{sub 8}Se{sub 92} are precisely measured at a hydrostatic pressure up to 8.5 GPa. The stoichiometric GeSe{sub 2} and GeS{sub 2} glasses exhibit elastic behavior in the pressure range up to 3 GPa, and their bulk modulus decreases at pressures higher than 2–2.5 GPa. At higher pressures, inelastic relaxation processes begin and their intensity is proportional to the logarithm of time. The relaxation rate for the GeSe{sub 2} glasses has a pronounced maximum at 3.5–4.5 GPa, which indicates the existence of several parallel structural transformation mechanisms. The nonstoichiometric glasses exhibit a diffuse transformation and inelastic behavior at pressures above 1–2 GPa. The maximum relaxation rate in these glasses is significantly lower than that in the stoichiometric GeSe{sub 2} glasses. All glasses are characterized by the “loss of memory” of history: after relaxation at a fixed pressure, the further increase in the pressure returns the volume to the compression curve obtained without a stop for relaxation. After pressure release, the residual densification in the stoichiometric glasses is about 7% and that in the Ge{sub 17}Se{sub 83} glasses is 1.5%. The volume of the Ge{sub 8}Se{sub 92} glass returns to its initial value within the limits of experimental error. As the pressure decreases, the effective bulk moduli of the Ge{sub 17}Se{sub 83} and Ge{sub 8}Se{sub 92} glasses coincide with the moduli after isobaric relaxation at the stage of increasing pressure, and the bulk modulus of the stoichiometric GeSe{sub 2} glass upon decreasing pressure noticeably exceeds the bulk modulus after isobaric relaxation at the stage of increasing pressure. Along with the reported data, our results can be used to draw conclusions regarding the diffuse transformations in glassy germanium chalcogenides during compression.},
doi = {10.1134/S1063776116060108},
journal = {Journal of Experimental and Theoretical Physics},
number = 2,
volume = 123,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}