Medium range order and structural relaxation in As-Se network glasses through FSDP analysis

R. Golovchak; P. Lucas; J. Oelgoetz; A. Kovalskiy; J. York-Winegar; Ch Saiyasombat; O. Shpotyuk; M. Feygenson; J. Neuefeind; H. Jain

doi:10.1016/j.matchemphys.2015.01.037

Medium range order and structural relaxation in As-Se network glasses through FSDP analysis

R. Golovchak, P. Lucas, J. Oelgoetz, A. Kovalskiy, J. York-Winegar, Ch Saiyasombat, O. Shpotyuk, M. Feygenson, J. Neuefeind, H. Jain

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

13 Scopus citations

Abstract

Synchrotron X-ray diffraction and neutron scattering studies are performed on As-Se glasses in two states: as-prepared (rejuvenated) and aged for ∼27 years. The first sharp diffraction peak (FSDP) obtained from the structure factor data as a function of composition and temperature indicates that the cooperative processes that are responsible for structural relaxation do not affect FSDP. The results are correlated with the composition dependence of the complex heat capacity of the glasses and concentration of different structural fragments in the glass network. The comparison of structural information shows that density fluctuations, which were thought previously to have a significant contribution to FSDP, have much smaller effect than the cation-cation correlations, presence of ordered structural fragments or cage molecules.

Original language	English
Pages (from-to)	432-442
Number of pages	11
Journal	Materials Chemistry and Physics
Volume	153
DOIs	https://doi.org/10.1016/j.matchemphys.2015.01.037
State	Published - Mar 1 2015
Externally published	Yes

Funding

R. Golovchak acknowledges support from U.S. National Science Foundation (NSF Grant No. DMR-0844014 ), for his Research Exchange visit to Lehigh University through International Materials Institute for New Functionality in Glass (IMI-NFG). A. Kovalskiy admits funding from NSF's DMR-1409160 project. A portion of this research at Oak Ridge National Laboratory's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences , under Contract No. DE-AC02-06CH11357 .

Funders	Funder number
Office of Basic Energy Sciences
Scientific User Facilities Division
U.S. National Science Foundation
National Science Foundation	1409160, DMR-1409160
U.S. Department of Energy
Office of Science
Oak Ridge National Laboratory

Keywords

Glass transitions
Glasses
Neutron scattering and diffraction
Powder diffraction

Access to Document

10.1016/j.matchemphys.2015.01.037

Cite this

@article{42cfef620dc94eee8b3dffe8668627c0,

title = "Medium range order and structural relaxation in As-Se network glasses through FSDP analysis",

abstract = "Synchrotron X-ray diffraction and neutron scattering studies are performed on As-Se glasses in two states: as-prepared (rejuvenated) and aged for ∼27 years. The first sharp diffraction peak (FSDP) obtained from the structure factor data as a function of composition and temperature indicates that the cooperative processes that are responsible for structural relaxation do not affect FSDP. The results are correlated with the composition dependence of the complex heat capacity of the glasses and concentration of different structural fragments in the glass network. The comparison of structural information shows that density fluctuations, which were thought previously to have a significant contribution to FSDP, have much smaller effect than the cation-cation correlations, presence of ordered structural fragments or cage molecules.",

keywords = "Glass transitions, Glasses, Neutron scattering and diffraction, Powder diffraction",

author = "R. Golovchak and P. Lucas and J. Oelgoetz and A. Kovalskiy and J. York-Winegar and Ch Saiyasombat and O. Shpotyuk and M. Feygenson and J. Neuefeind and H. Jain",

year = "2015",

month = mar,

day = "1",

doi = "10.1016/j.matchemphys.2015.01.037",

language = "English",

volume = "153",

pages = "432--442",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier",

}

TY - JOUR

T1 - Medium range order and structural relaxation in As-Se network glasses through FSDP analysis

AU - Golovchak, R.

AU - Lucas, P.

AU - Oelgoetz, J.

AU - Kovalskiy, A.

AU - York-Winegar, J.

AU - Saiyasombat, Ch

AU - Shpotyuk, O.

AU - Feygenson, M.

AU - Neuefeind, J.

AU - Jain, H.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - Synchrotron X-ray diffraction and neutron scattering studies are performed on As-Se glasses in two states: as-prepared (rejuvenated) and aged for ∼27 years. The first sharp diffraction peak (FSDP) obtained from the structure factor data as a function of composition and temperature indicates that the cooperative processes that are responsible for structural relaxation do not affect FSDP. The results are correlated with the composition dependence of the complex heat capacity of the glasses and concentration of different structural fragments in the glass network. The comparison of structural information shows that density fluctuations, which were thought previously to have a significant contribution to FSDP, have much smaller effect than the cation-cation correlations, presence of ordered structural fragments or cage molecules.

AB - Synchrotron X-ray diffraction and neutron scattering studies are performed on As-Se glasses in two states: as-prepared (rejuvenated) and aged for ∼27 years. The first sharp diffraction peak (FSDP) obtained from the structure factor data as a function of composition and temperature indicates that the cooperative processes that are responsible for structural relaxation do not affect FSDP. The results are correlated with the composition dependence of the complex heat capacity of the glasses and concentration of different structural fragments in the glass network. The comparison of structural information shows that density fluctuations, which were thought previously to have a significant contribution to FSDP, have much smaller effect than the cation-cation correlations, presence of ordered structural fragments or cage molecules.

KW - Glass transitions

KW - Glasses

KW - Neutron scattering and diffraction

KW - Powder diffraction

UR - http://www.scopus.com/inward/record.url?scp=84922399114&partnerID=8YFLogxK

U2 - 10.1016/j.matchemphys.2015.01.037

DO - 10.1016/j.matchemphys.2015.01.037

M3 - Article

AN - SCOPUS:84922399114

SN - 0254-0584

VL - 153

SP - 432

EP - 442

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

ER -

Medium range order and structural relaxation in As-Se network glasses through FSDP analysis

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this