Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses

Yann Gueguen, Ellyn A. King, Vincent Keryvin, Jean Christophe Sangleboeuf, Tanguy Rouxel, Bruno Bureau, Pierre Lucas

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We propose here to investigate the non-equilibrium viscosity of Ge-Se glasses under and after light irradiation. Ge10Se90 and Ge20Se80 fibers have been aged in the dark and under ambient light, over months. During aging, both the relaxation of enthalpy and the viscosity have been investigated. The viscosity was measured by shear relaxation-recovery tests allowing the measurement of non-equilibrium viscosity. When Ge10Se90 glass fibers are aged under irradiation, a relatively fast fictive temperature decrease is observed. Concomitantly, during aging under irradiation, the non-equilibrium viscosity increases and reaches an equilibrium after two months of aging. This viscosity increase is also observed in Ge20Se80 fibers. Nevertheless, this equilibrium viscosity is far below the viscosity expected at the configurational equilibrium. As soon as the irradiation ceases, the viscosity increases almost instantaneously by about one order of magnitude. Then, if the fibers are kept in the dark, their viscosity slowly increases over months. The analysis of the shear relaxation functions shows that the aging is thermorheologically simple. On the other side, there is no simple relaxation between the shear relaxation functions measured under irradiation and those measured in the dark. These results clearly suggest that a very specific photoinduced aging process occurs under irradiation. This aging is due to photorelaxation. Nevertheless, the viscosity changes are not solely correlated to photoaging and photorelaxation. A scenario is proposed to explain all the observed viscosity evolutions under and after irradiation, on the basis of photoinduced transient defects.

Original languageEnglish (US)
Article number074901
JournalJournal of Applied Physics
Volume114
Issue number7
DOIs
StatePublished - Aug 21 2013

Fingerprint

viscosity
glass
irradiation
shear
fibers
glass fibers
enthalpy
recovery
defects

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Gueguen, Y., King, E. A., Keryvin, V., Sangleboeuf, J. C., Rouxel, T., Bureau, B., & Lucas, P. (2013). Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses. Journal of Applied Physics, 114(7), [074901]. https://doi.org/10.1063/1.4818482

Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses. / Gueguen, Yann; King, Ellyn A.; Keryvin, Vincent; Sangleboeuf, Jean Christophe; Rouxel, Tanguy; Bureau, Bruno; Lucas, Pierre.

In: Journal of Applied Physics, Vol. 114, No. 7, 074901, 21.08.2013.

Research output: Contribution to journalArticle

Gueguen, Y, King, EA, Keryvin, V, Sangleboeuf, JC, Rouxel, T, Bureau, B & Lucas, P 2013, 'Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses', Journal of Applied Physics, vol. 114, no. 7, 074901. https://doi.org/10.1063/1.4818482
Gueguen Y, King EA, Keryvin V, Sangleboeuf JC, Rouxel T, Bureau B et al. Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses. Journal of Applied Physics. 2013 Aug 21;114(7). 074901. https://doi.org/10.1063/1.4818482
Gueguen, Yann ; King, Ellyn A. ; Keryvin, Vincent ; Sangleboeuf, Jean Christophe ; Rouxel, Tanguy ; Bureau, Bruno ; Lucas, Pierre. / Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses. In: Journal of Applied Physics. 2013 ; Vol. 114, No. 7.
@article{f1b1c8a99b1c4c658f02b05fa6008b17,
title = "Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses",
abstract = "We propose here to investigate the non-equilibrium viscosity of Ge-Se glasses under and after light irradiation. Ge10Se90 and Ge20Se80 fibers have been aged in the dark and under ambient light, over months. During aging, both the relaxation of enthalpy and the viscosity have been investigated. The viscosity was measured by shear relaxation-recovery tests allowing the measurement of non-equilibrium viscosity. When Ge10Se90 glass fibers are aged under irradiation, a relatively fast fictive temperature decrease is observed. Concomitantly, during aging under irradiation, the non-equilibrium viscosity increases and reaches an equilibrium after two months of aging. This viscosity increase is also observed in Ge20Se80 fibers. Nevertheless, this equilibrium viscosity is far below the viscosity expected at the configurational equilibrium. As soon as the irradiation ceases, the viscosity increases almost instantaneously by about one order of magnitude. Then, if the fibers are kept in the dark, their viscosity slowly increases over months. The analysis of the shear relaxation functions shows that the aging is thermorheologically simple. On the other side, there is no simple relaxation between the shear relaxation functions measured under irradiation and those measured in the dark. These results clearly suggest that a very specific photoinduced aging process occurs under irradiation. This aging is due to photorelaxation. Nevertheless, the viscosity changes are not solely correlated to photoaging and photorelaxation. A scenario is proposed to explain all the observed viscosity evolutions under and after irradiation, on the basis of photoinduced transient defects.",
author = "Yann Gueguen and King, {Ellyn A.} and Vincent Keryvin and Sangleboeuf, {Jean Christophe} and Tanguy Rouxel and Bruno Bureau and Pierre Lucas",
year = "2013",
month = "8",
day = "21",
doi = "10.1063/1.4818482",
language = "English (US)",
volume = "114",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "7",

}

TY - JOUR

T1 - Photoinduced aging and viscosity evolution in Se-rich Ge-Se glasses

AU - Gueguen, Yann

AU - King, Ellyn A.

AU - Keryvin, Vincent

AU - Sangleboeuf, Jean Christophe

AU - Rouxel, Tanguy

AU - Bureau, Bruno

AU - Lucas, Pierre

PY - 2013/8/21

Y1 - 2013/8/21

N2 - We propose here to investigate the non-equilibrium viscosity of Ge-Se glasses under and after light irradiation. Ge10Se90 and Ge20Se80 fibers have been aged in the dark and under ambient light, over months. During aging, both the relaxation of enthalpy and the viscosity have been investigated. The viscosity was measured by shear relaxation-recovery tests allowing the measurement of non-equilibrium viscosity. When Ge10Se90 glass fibers are aged under irradiation, a relatively fast fictive temperature decrease is observed. Concomitantly, during aging under irradiation, the non-equilibrium viscosity increases and reaches an equilibrium after two months of aging. This viscosity increase is also observed in Ge20Se80 fibers. Nevertheless, this equilibrium viscosity is far below the viscosity expected at the configurational equilibrium. As soon as the irradiation ceases, the viscosity increases almost instantaneously by about one order of magnitude. Then, if the fibers are kept in the dark, their viscosity slowly increases over months. The analysis of the shear relaxation functions shows that the aging is thermorheologically simple. On the other side, there is no simple relaxation between the shear relaxation functions measured under irradiation and those measured in the dark. These results clearly suggest that a very specific photoinduced aging process occurs under irradiation. This aging is due to photorelaxation. Nevertheless, the viscosity changes are not solely correlated to photoaging and photorelaxation. A scenario is proposed to explain all the observed viscosity evolutions under and after irradiation, on the basis of photoinduced transient defects.

AB - We propose here to investigate the non-equilibrium viscosity of Ge-Se glasses under and after light irradiation. Ge10Se90 and Ge20Se80 fibers have been aged in the dark and under ambient light, over months. During aging, both the relaxation of enthalpy and the viscosity have been investigated. The viscosity was measured by shear relaxation-recovery tests allowing the measurement of non-equilibrium viscosity. When Ge10Se90 glass fibers are aged under irradiation, a relatively fast fictive temperature decrease is observed. Concomitantly, during aging under irradiation, the non-equilibrium viscosity increases and reaches an equilibrium after two months of aging. This viscosity increase is also observed in Ge20Se80 fibers. Nevertheless, this equilibrium viscosity is far below the viscosity expected at the configurational equilibrium. As soon as the irradiation ceases, the viscosity increases almost instantaneously by about one order of magnitude. Then, if the fibers are kept in the dark, their viscosity slowly increases over months. The analysis of the shear relaxation functions shows that the aging is thermorheologically simple. On the other side, there is no simple relaxation between the shear relaxation functions measured under irradiation and those measured in the dark. These results clearly suggest that a very specific photoinduced aging process occurs under irradiation. This aging is due to photorelaxation. Nevertheless, the viscosity changes are not solely correlated to photoaging and photorelaxation. A scenario is proposed to explain all the observed viscosity evolutions under and after irradiation, on the basis of photoinduced transient defects.

UR - http://www.scopus.com/inward/record.url?scp=84883308535&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883308535&partnerID=8YFLogxK

U2 - 10.1063/1.4818482

DO - 10.1063/1.4818482

M3 - Article

VL - 114

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 7

M1 - 074901

ER -