Molecular structure of ternary Ge–As–Te glasses studied by Mössbauer spectroscopy

Aldon, Laurent; Lippens, P.E.; Jumas, Jean‐Claude; Fourcade, Josette Olivier; Bemelmans, Hilde; Langouche, Guido

doi:10.1016/s0022-3093(99)00655-9

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…9 Investigations regarding glass-forming ability, some physical properties, and structure of Ge-As-Te glasses were already performed by several authors. [10][11][12][13][14][15][16] For applications in optics/photonics, one of the key optical characteristics of chalcogenide glasses is refractive index (n). In visible and near-infrared (NIR) spectral region, refractive index is often evaluated by prism coupling method, modeling of spectroscopic data (transmission and/or reflection), ellipsometry or it can be calculated by quantum mechanics, etc.…”

Section: Introductionmentioning

confidence: 99%

Accurate Determination of Optical Functions of Ge–As–Te Glasses via Spectroscopic Ellipsometry

et al. 2014

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International audienceVariable angle spectroscopic ellipsometry technique was used to characterize optical functions of chalcogenide glasses from Ge-As-Te system in broad spectral range (300 nm-20 μm). Measured real and imaginary parts of pseudodielec. function were modeled with Cody-Lorentz approach and Sellmeier equation. Very good agreement between exptl. measured and modeled imaginary and real parts of pseudodielec. functions leads to precise detn. of optical functions (refractive index, extinction coeff.) of studied Ge-As-Te glasses in extremely broad spectral range covering UV-Vis-NIR-MIR. The method is generally applicable for other glasses and amorphous materials

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Section: Introductionmentioning

confidence: 99%

Accurate Determination of Optical Functions of Ge–As–Te Glasses via Spectroscopic Ellipsometry

et al. 2014

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“…Interpretation of both isomer shift and quadrupole splitting variations was explained with such theoretical approaches [20,21]. In the case of glassy compounds quadrupole splitting distributions have been used [22,23] based on previous works [24,25,26].…”

Section: Introductionmentioning

confidence: 99%

2D-correlation analysis applied to in situ and operando Mössbauer spectroscopy

Aldon

Péréa

2011

Journal of Power Sources

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In this paper we propose a new way for Mössbauer data treatment when numerous experimental spectra are recorded in operando conditions depending on a perturbation. In our exemple, the perturbation is the Li amount extracted from a positive electrode material LiFe 0.75 Mn 0.25 PO 4 . In other cases perturbation could be the recording temperature, the pressure or kinetic parameter or even time for isothermal experiments. From analysis of both synchronous and asynchronous 2D correlation spectra, we can focus our attention on the intensity variations at some specific positions deduced from crosspeaks. This analytical method is very powerful when overlap between absorption lines is observed. This is typically the case when Fe 2+ /Fe 3+ contributions are simultaneously present in a Mössbauer spectrum at lower velocities. Key wordstwo-dimensional correlation spectroscopy, analytical method, Mössbauer spectrocopy, lithium battery, positive electrode materials, LiFePO 4 , FePO 4 , olivine, in situ and operando measurements, data treatment.

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“…In Te-rich glasses, few of the Te atoms may exist in three-fold coordination. The three fold coordinated Te sites will enhance the metallic character and the covalent nature of the bond might be weakened [17,[29][30][31]. This would alter the balance between the constraints and the degrees of freedom [30].…”

Section: Discussionmentioning

confidence: 99%

Rapid quenching and glass formation in chalcogenide glasses: Preparation and properties of Ge–As–Te glasses over an extended composition ranges

Ramesh

2009

Journal of Non-Crystalline Solids

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Molecular structure of ternary Ge–As–Te glasses studied by Mössbauer spectroscopy

Cited by 8 publications

References 24 publications

Accurate Determination of Optical Functions of Ge–As–Te Glasses via Spectroscopic Ellipsometry

Accurate Determination of Optical Functions of Ge–As–Te Glasses via Spectroscopic Ellipsometry

2D-correlation analysis applied to in situ and operando Mössbauer spectroscopy

Rapid quenching and glass formation in chalcogenide glasses: Preparation and properties of Ge–As–Te glasses over an extended composition ranges

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