Reversibility windows in selenide-based chalcogenide glasses

Shpotyuk, O.; Hyla, M.; Boyko, V.; Golovchak, R.

doi:10.1016/j.physb.2008.07.024

Cited by 16 publications

(13 citation statements)

References 29 publications

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“…The alloys containing less than 20% of germanium is a "soft phase", while the richer germanium alloys (more than 26 at.%) are the "hard phase". The references [21][22][23][24] practically confirmed these results.…”

Section: Introduction Contemporary Interpretation Of Glass Aging Prosupporting

confidence: 67%

“…The binary non-polymorphoid compositions are situated between the compositions containing the polymorphoids of one or another individual chemical substance, such as the GeSe 2 (or As 2 Se 3 ) polymorphoids on the one side and Se polymorphoids on the other side in the glassforming system GeSe 2 -Se (As 2 Se 3 -Se). The intermediate "self-organizing" phases or the "reversibility windows" [20][21][22][23][24] correspond to the non-polymorphoid compositions.…”

Section: Aging Of Glass-forming Substance: Experiments and Discussionmentioning

confidence: 99%

“…As a result of 8-year aging, Δx has decreased to 7% [1]. The authors [22] concluded: lack of physical aging is the most appropriate criterion for the identification of the "self-organizing phase" (the terms: "self-organizing phase", "intermediate phase" and "window of reversibility" are equivalent).…”

Section: Introduction Contemporary Interpretation Of Glass Aging Promentioning

confidence: 99%

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The polymer–polymorphoid nature of glass aging

Minaev

Parfenov

Тимошенков

et al. 2014

Journal of Non-Crystalline Solids

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Section: Introduction Contemporary Interpretation Of Glass Aging Prosupporting

confidence: 67%

Section: Aging Of Glass-forming Substance: Experiments and Discussionmentioning

confidence: 99%

Section: Introduction Contemporary Interpretation Of Glass Aging Promentioning

confidence: 99%

See 1 more Smart Citation

The polymer–polymorphoid nature of glass aging

Minaev

Parfenov

Тимошенков

et al. 2014

Journal of Non-Crystalline Solids

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“…Thus, starting onward from the rigidity percolation point at x = 20 [28] the number of Ge atoms (estimated from the ratio between ES and CS tetrahedra in Ge 3d spectrum) participating in the 'outrigger raft' clusters remains almost constant. However, contrary to Ge-Se glasses [14,29], these clusters do not form the whole glass backbone, but are interconnected via short chalcogen chains and individual GeS 4/2 tetrahedra.…”

Section: Discussionmentioning

confidence: 86%

Short-range order evolution in S-rich Ge–S glasses by X-ray photoelectron spectroscopy

Golovchak

Shpotyuk

Kozyukhin³

et al. 2011

Journal of Non-Crystalline Solids

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“…Although some other models [335,371] with a weaker theoretical basis have argued that the existence of the IP remains elusive, albeit contradicted by the variety of experimental signatures, there is a strong theoretical and numerical indication that RW or IP glasses display a particular relaxation kinetics manifesting in ∆H nr that leads to anomalous properties in different physical properties (Fig. 40).…”

Section: Alternative Signatures Of Rwsmentioning

confidence: 99%

Relaxation and physical aging in network glasses: a review

Micoulaut

2016

Rep. Prog. Phys.

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Abstract. Recent progresses in the description of glassy relaxation and ageing are reviewed for the wide class of network-forming materials such as GeO 2 , Ge x Se 1−x , silicates (SiO 2 -Na 2 O) or borates (B 2 O 3 -Li 2 O), all of them having an important usefulness in domestic, geological or optoelectronic applications. A brief introduction of the glass transition phenomenology is given, together with the salient features that are revealed both from theory and experiments. Standard experimental methods used for the characterization of the slowing down of the dynamics are reviewed. We then discuss the important role played by aspect of network topology and rigidity for the understanding of the relaxation of the glass transition, while also permitting analytical predictions of glass properties from simple and insightful models based on the network structure. We also emphasize the great utility of computer simulations which probe the dynamics at the molecular level, and permit to calculate various structure-related functions in connection with glassy relaxation and the physics of ageing which reveals the off-equilibrium nature of glasses. We discuss the notion of spatial variations of structure which leads to the picture of "dynamic heterogeneities", and recent results of this important topic for network glasses are also reviewed.PACS numbers: 61.43. Fs, 64.70.kj Relaxation and physical ageing in network glasses 2 Figure 1. Typical network-forming glasses: a) A stoichiometric glass former (SiO 2 , B 2 S 3 ) whose structure and network connectivity can be altered by the addition (b) of 2-fold coordinated atoms (usually chalcogens, S, Se) that lead to cross-linked chains. The structure can also be depolymerized (c) by the addition of a network modifier (alkali oxides or chalcogenides, Na 2 O, Li 2 S, etc.). Glassy dynamics depends strongly on the network topology, i.e. the way bonds and angles arrange to lead to a connected atomic network. Note that only chalcogenides can produce a mixture of these three kinds of basic networks, e.g. (1-x)Ge y Se 1−y -xAg 2 Se [2], and for the latter system x=0 corresponds to case (b), y=33% corresponds to case (c), and both conditions together (x=0,y=33 %) to case (a).

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Reversibility windows in selenide-based chalcogenide glasses

Cited by 16 publications

References 29 publications

The polymer–polymorphoid nature of glass aging

The polymer–polymorphoid nature of glass aging

Short-range order evolution in S-rich Ge–S glasses by X-ray photoelectron spectroscopy

Relaxation and physical aging in network glasses: a review

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