Photoinduced structural relaxation in chalcogenide glasses

Pierre Lucas, Anand Doraiswamy, Ellyn A. King

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Measurements of residual entropy were performed on irradiated chalcogenide glasses using a modulated differential scanning calorimeter. We show that glass from the GexSe1-x system can undergo extensive structural relaxation under sub-bandgap irradiation. This ability to relax is correlated with the strong/fragile character of the glass-forming system. Fragile glassformers experience larger relaxation as expected from the Kauzmann entropy plot. The temperature dependence of this photorelaxation process is also consistent with entropy relaxation. These measurements demonstrate that the glass configurational entropy decreases under irradiation. This can be regarded as a light activated aging process.

Original languageEnglish (US)
Pages (from-to)35-42
Number of pages8
JournalJournal of Non-Crystalline Solids
Volume332
Issue number1-3
DOIs
StatePublished - Dec 15 2003

Fingerprint

Structural relaxation
Entropy
entropy
Glass
glass
Irradiation
irradiation
Calorimeters
calorimeters
Energy gap
Aging of materials
plots
Scanning
temperature dependence
scanning
Temperature

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Photoinduced structural relaxation in chalcogenide glasses. / Lucas, Pierre; Doraiswamy, Anand; King, Ellyn A.

In: Journal of Non-Crystalline Solids, Vol. 332, No. 1-3, 15.12.2003, p. 35-42.

Research output: Contribution to journalArticle

Lucas, Pierre ; Doraiswamy, Anand ; King, Ellyn A. / Photoinduced structural relaxation in chalcogenide glasses. In: Journal of Non-Crystalline Solids. 2003 ; Vol. 332, No. 1-3. pp. 35-42.
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