Short range order in Ge-As-Se glasses

I. Pethes; I. Kaban; R. P. Wang; B. Luther-Davies; P. Jóvári

doi:10.1016/j.jallcom.2014.11.002

Short range order in Ge-As-Se glasses

I. Pethes, I. Kaban, R. P. Wang, B. Luther-Davies, P. Jóvári^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

The structure of Ge_xAs₁₀Se₉₀_-_x (x = 10, 17.5, 22.5, 27.5, 30, 35) glasses as well as some other compositions extensively used in infrared optics, e.g. GASIR® (Ge₂₂As₂₀Se₅₈) and AMTIR-1 (Ge₃₃As₁₂Se₅₅) has been investigated by X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) measurements at the Ge, As and Se K-edges. Structural models have been obtained by fitting simultaneously XRD and EXAFS data by the reverse Monte Carlo simulation technique. Unlike other IV-V-VI glasses (e.g. Ge-As-S, Ge-Sb-Te, Ge-Sb-Se, Ge-As-Te) Ge-As-Se glasses are characterized by the lack of preferential bonding and behave as random covalent networks: Ge-Ge, Ge-As or As-As bonds can be found in Se-rich compositions while Se-Se bonding remains in strongly Se-deficient glasses as well.

Original language	English
Pages (from-to)	454-459
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	623
DOIs	https://doi.org/10.1016/j.jallcom.2014.11.002
Publication status	Published - 25 Feb 2015

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10.1016/j.jallcom.2014.11.002

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@article{dfd532144f314fc3b89ba4979ed348e8,

title = "Short range order in Ge-As-Se glasses",

abstract = "The structure of GexAs10Se90-x (x = 10, 17.5, 22.5, 27.5, 30, 35) glasses as well as some other compositions extensively used in infrared optics, e.g. GASIR{\textregistered} (Ge22As20Se58) and AMTIR-1 (Ge33As12Se55) has been investigated by X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) measurements at the Ge, As and Se K-edges. Structural models have been obtained by fitting simultaneously XRD and EXAFS data by the reverse Monte Carlo simulation technique. Unlike other IV-V-VI glasses (e.g. Ge-As-S, Ge-Sb-Te, Ge-Sb-Se, Ge-As-Te) Ge-As-Se glasses are characterized by the lack of preferential bonding and behave as random covalent networks: Ge-Ge, Ge-As or As-As bonds can be found in Se-rich compositions while Se-Se bonding remains in strongly Se-deficient glasses as well.",

keywords = "Chalcogenide glasses, EXAFS, Ge-As-Se, RMC, Structure, XRD",

author = "I. Pethes and I. Kaban and Wang, {R. P.} and B. Luther-Davies and P. J{\'o}v{\'a}ri",

year = "2015",

month = feb,

day = "25",

doi = "10.1016/j.jallcom.2014.11.002",

language = "English",

volume = "623",

pages = "454--459",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

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T1 - Short range order in Ge-As-Se glasses

AU - Pethes, I.

AU - Kaban, I.

AU - Wang, R. P.

AU - Luther-Davies, B.

AU - Jóvári, P.

PY - 2015/2/25

Y1 - 2015/2/25

N2 - The structure of GexAs10Se90-x (x = 10, 17.5, 22.5, 27.5, 30, 35) glasses as well as some other compositions extensively used in infrared optics, e.g. GASIR® (Ge22As20Se58) and AMTIR-1 (Ge33As12Se55) has been investigated by X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) measurements at the Ge, As and Se K-edges. Structural models have been obtained by fitting simultaneously XRD and EXAFS data by the reverse Monte Carlo simulation technique. Unlike other IV-V-VI glasses (e.g. Ge-As-S, Ge-Sb-Te, Ge-Sb-Se, Ge-As-Te) Ge-As-Se glasses are characterized by the lack of preferential bonding and behave as random covalent networks: Ge-Ge, Ge-As or As-As bonds can be found in Se-rich compositions while Se-Se bonding remains in strongly Se-deficient glasses as well.

AB - The structure of GexAs10Se90-x (x = 10, 17.5, 22.5, 27.5, 30, 35) glasses as well as some other compositions extensively used in infrared optics, e.g. GASIR® (Ge22As20Se58) and AMTIR-1 (Ge33As12Se55) has been investigated by X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) measurements at the Ge, As and Se K-edges. Structural models have been obtained by fitting simultaneously XRD and EXAFS data by the reverse Monte Carlo simulation technique. Unlike other IV-V-VI glasses (e.g. Ge-As-S, Ge-Sb-Te, Ge-Sb-Se, Ge-As-Te) Ge-As-Se glasses are characterized by the lack of preferential bonding and behave as random covalent networks: Ge-Ge, Ge-As or As-As bonds can be found in Se-rich compositions while Se-Se bonding remains in strongly Se-deficient glasses as well.

KW - Chalcogenide glasses

KW - EXAFS

KW - Ge-As-Se

KW - RMC

KW - Structure

KW - XRD

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U2 - 10.1016/j.jallcom.2014.11.002

DO - 10.1016/j.jallcom.2014.11.002

M3 - Article

SN - 0925-8388

VL - 623

SP - 454

EP - 459

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Short range order in Ge-As-Se glasses

Abstract

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