Compositional variation in the structure of Ge–S glasses

Takebe, Hiromichi; Maeda, Hiroki; Morinaga, Kenji

doi:10.1016/s0022-3093(01)00820-1

Cited by 74 publications

(63 citation statements)

References 26 publications

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“…Here, the ethane-like units play a role of glue. In fact, the composition variation of density indicates that there is considerable volume contraction in the region from Ge 33 to 45% [5,15]. The same tendency is also observed in Ge-Se system [16].…”

Section: A Structural Modelsupporting

confidence: 57%

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Structural development in Ge-rich Ge–S glasses

Sakaguchi

Ténné

Mitkova

2009

Journal of Non-Crystalline Solids

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This is an author-produced, peer-reviewed version of this article. AbstractThe Raman spectra of Ge-S glasses in the Ge-rich region from Ge 33 to 46 % have been investigated in order to know the structural development of the network glasses. From the detailed curve fits, we have found that there is an unassigned peak at 410 cm -1 and it becomes larger with increasing Ge composition. To clarify the structural origin of the peak, we virtually constructed the atomic arrangement of the glassy state starting from the crystalline state through the liquid state and changed the composition gradually depleting the medium in sulfur. From the consideration of the structural modeling and the atomic orbital theory, we suggest that single Ge-S chain is a probable structural origin of the peak.

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Section: A Structural Modelsupporting

confidence: 57%

“…Fig.1 shows the Raman spectra of Ge-rich Ge-S glasses from Ge 33 to 46%. The three Raman spectra, (a)-(c), are from the results of Takebe et al [5], which were measured for bulk samples. The spectrum at Ge 46% was obtained using thin film prepared by sputtering in the present study.…”

Section: Methodsmentioning

confidence: 99%

Structural development in Ge-rich Ge–S glasses

Sakaguchi

Ténné

Mitkova

2009

Journal of Non-Crystalline Solids

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“…In this region, two valences of Ge 4{ and Ge 2{ for Ge exist and Ge plays roles of both networkformer andmodifier. 27) The atomic structure of GeS glass 27) in the region of 5762 mol÷S is similar to that of multicomponent oxide glasses. The XAFS analysis of alkali silicate glasses 28) reveals that rareearth ions are dissolved into modifier rich sites in the mo dified random network model and the rareearth ions are sur rounded by the coordinated closest neighbors of oxygen ions and the second coordinated neighbors of alkali ions.…”

Section: Rareearth Dopingmentioning

confidence: 78%

Non-Toxic Sulfide Glasses and Thin Films for Optical Applications

Takebe

Kitagawa

Hewak

2005

J. Ceram. Soc. Japan

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“…The relative intensity of the band (vi) is weaker than that of band (v) at 66.7 mol÷ BaS but it becomes stronger at 66.7 mol÷ BaS (S/Ga2.5). No SS bonds, which were observed in the Srich GeS glasses, 16) were detected in the RSGa 2 S 3 glasses. CaOAl 2 O 3 glasses with 50 mol÷ CaO are known to form OO bonds due to the incorporation of oxygen from melting atmosphere.…”

Section: Density and Molar Volumementioning

confidence: 80%

Glass Forming Region and Structure of Vitreous RS-Ga2S3 (R=Ca, Sr, Ba)

Ishibashi

Takebe

Morinaga³

2003

J. Ceram. Soc. Japan

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Gallium sulde glasses were prepared in the RSGa 2 S 3 (RCa, Sr, Ba) systems. Respective glass forming regions are 67.570.0 mol÷ CaS, 63.868.8 mol÷ SrS and 60.073.8 mol÷ BaS. Transmission spectra in the visible region, refractive index and glass transition and onset crystallization temperatures were measured for representative compositions of SrS and BaSGa 2 S 3 transparent glasses. Raman spectroscopy reveals that RSGa 2 S 3 glasses consist of the network of GeS 4 tetrahedra due to the RS addition. The compositional dependence of molar volume indicates a plateau region at 6570 mol÷ RS in SrS and BaSGa 2 S 3 glasses. The morphology of sulfur complex anions in RSGa 2 S 3 glass melts is discussed using the sulfurtogallium ratio as a variable parameter. The combined results suggest that welldeveloped glass networks are formed near 66.7 mol÷ RS (S/Ga2.5) in the SrS and BaSGa 2 S 3 systems. [Received November 1, 2002; Accepted February 7, 2003] Keywords : Sulde, Alkaline earth, Gallium, Glass forming region, Structure, Absorption edge 1. Introduction Ga 2 S 3 based glasses are recently of interest for passive and active optical materials in the near and midinfrared. 1),2) Ga 2 S 3 based glasses have relatively short absorption edges, e.g., 450500 nm, good thermal and chemicalstabilities and high rareearth solubility in comparison with other sul de glasses. Ga 2 S 3 does not form a glass on its own. The glass forming region reported previously extends to the fol lowing binary systems: L 2 S 3 Ga 2 S 3 (LY, LaEr, except for Eu), 3) GeS 2 Ga 2 S 3 , 4) Na 2 SGa 2 S 3 , 5) PbSGa 2 S 3 6) and BaSGa 2 S 3 . 7) New glass compositions are still demanded for optical devices in both thin lm and ber forms. There are only a few reports on glass formation and properties in the RSGa 2 S 3 (RCa, Sr, Ba) systems.In this study glass forming region is determined by con ventional meltquenching method in the RSGa 2 S 3 (RCa, Sr, Ba) systems. The optical and thermal properties of the prepared glasses were compared to other sulde glasses. The structure of RSGa 2 S 3 glasses is discussed in terms of Raman spectra and molar volume of glass samples.

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Compositional variation in the structure of Ge–S glasses

Cited by 74 publications

References 26 publications

Structural development in Ge-rich Ge–S glasses

Structural development in Ge-rich Ge–S glasses

Non-Toxic Sulfide Glasses and Thin Films for Optical Applications

Glass Forming Region and Structure of Vitreous RS-Ga2S3 (R=Ca, Sr, Ba)

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