On the structure of Ge-As-Te-Cu glasses

Pál Jóvári; Pierre Lucas; Zhiyong Yang; Bruno Bureau; Ivan Kaban; Brigitte Beuneu; Claudia Pantalei; Jozef Bednarčik

doi:10.1016/j.jnoncrysol.2015.11.003

On the structure of Ge-As-Te-Cu glasses

Pál Jóvári, Pierre Lucas, Zhiyong Yang, Bruno Bureau, Ivan Kaban, Brigitte Beuneu, Claudia Pantalei, Jozef Bednarčik

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

7 Scopus citations

Abstract

Short range order in glassy 0.9(Ge_0.1As_0.15Te_0.75)-0.1Cu (GATC1) and 0.9(Ge_0.05As_0.55Te_0.4)-0.1Cu (GATC2) was studied by neutron- and X-ray diffraction as well as EXAFS (extended X-ray absorption fine structure) measurements at the K-edges of all components. The reverse Monte Carlo simulation technique was used to create models consistent with all experimental datasets. It was found that Cu binds predominantly to Te in GATC1 while Cu-As and Cu-Cu bonding is also significant in GATC2. Ge and As atoms have 4 and 3 Ge/As/Te neighbors in both compositions. In GATC1 the formation of 'extra' Te-Te bonds can be observed, similarly to GeTe₄-AgI glasses.

Original language	English (US)
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Non-Crystalline Solids
Volume	433
DOIs	https://doi.org/10.1016/j.jnoncrysol.2015.11.003
State	Published - Feb 1 2016

Keywords

EXAFS
Glass structure
Infrared glasses
Neutron diffraction
Reverse Monte Carlo simulation
X-ray diffraction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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10.1016/j.jnoncrysol.2015.11.003

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title = "On the structure of Ge-As-Te-Cu glasses",

abstract = "Short range order in glassy 0.9(Ge0.1As0.15Te0.75)-0.1Cu (GATC1) and 0.9(Ge0.05As0.55Te0.4)-0.1Cu (GATC2) was studied by neutron- and X-ray diffraction as well as EXAFS (extended X-ray absorption fine structure) measurements at the K-edges of all components. The reverse Monte Carlo simulation technique was used to create models consistent with all experimental datasets. It was found that Cu binds predominantly to Te in GATC1 while Cu-As and Cu-Cu bonding is also significant in GATC2. Ge and As atoms have 4 and 3 Ge/As/Te neighbors in both compositions. In GATC1 the formation of 'extra' Te-Te bonds can be observed, similarly to GeTe4-AgI glasses.",

keywords = "EXAFS, Glass structure, Infrared glasses, Neutron diffraction, Reverse Monte Carlo simulation, X-ray diffraction",

author = "P{\'a}l J{\'o}v{\'a}ri and Pierre Lucas and Zhiyong Yang and Bruno Bureau and Ivan Kaban and Brigitte Beuneu and Claudia Pantalei and Jozef Bednar{\v c}ik",

note = "Publisher Copyright: {\textcopyright} 2015 Published by Elsevier B.V.",

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doi = "10.1016/j.jnoncrysol.2015.11.003",

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AU - Jóvári, Pál

AU - Lucas, Pierre

AU - Yang, Zhiyong

AU - Bureau, Bruno

AU - Kaban, Ivan

AU - Beuneu, Brigitte

AU - Pantalei, Claudia

AU - Bednarčik, Jozef

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Short range order in glassy 0.9(Ge0.1As0.15Te0.75)-0.1Cu (GATC1) and 0.9(Ge0.05As0.55Te0.4)-0.1Cu (GATC2) was studied by neutron- and X-ray diffraction as well as EXAFS (extended X-ray absorption fine structure) measurements at the K-edges of all components. The reverse Monte Carlo simulation technique was used to create models consistent with all experimental datasets. It was found that Cu binds predominantly to Te in GATC1 while Cu-As and Cu-Cu bonding is also significant in GATC2. Ge and As atoms have 4 and 3 Ge/As/Te neighbors in both compositions. In GATC1 the formation of 'extra' Te-Te bonds can be observed, similarly to GeTe4-AgI glasses.

AB - Short range order in glassy 0.9(Ge0.1As0.15Te0.75)-0.1Cu (GATC1) and 0.9(Ge0.05As0.55Te0.4)-0.1Cu (GATC2) was studied by neutron- and X-ray diffraction as well as EXAFS (extended X-ray absorption fine structure) measurements at the K-edges of all components. The reverse Monte Carlo simulation technique was used to create models consistent with all experimental datasets. It was found that Cu binds predominantly to Te in GATC1 while Cu-As and Cu-Cu bonding is also significant in GATC2. Ge and As atoms have 4 and 3 Ge/As/Te neighbors in both compositions. In GATC1 the formation of 'extra' Te-Te bonds can be observed, similarly to GeTe4-AgI glasses.

KW - EXAFS

KW - Glass structure

KW - Infrared glasses

KW - Neutron diffraction

KW - Reverse Monte Carlo simulation

KW - X-ray diffraction

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JO - Journal of Non-Crystalline Solids

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ER -

On the structure of Ge-As-Te-Cu glasses

Abstract

Keywords

ASJC Scopus subject areas

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