Pressure-driven transformation of the ordering in amorphous network-forming materials

Research output: Contribution to journalArticle

17 Citations (Scopus)
86 Downloads (Pure)

Abstract

The pressure-induced changes to the structure of disordered oxide and chalcogenide network-forming materials are investigated on the length scales associated with the first three peaks in measured diffraction patterns. The density dependence of a given peak position does not yield the network dimensionality, in contrast to metallic glasses where the results indicate a fractal geometry with a local dimensionality of ~5/2. For oxides, a common relation is found between the intermediate-range ordering, as described by the position of the first sharp diffraction peak, and the oxygen-packing fraction, a parameter that plays a key role in driving changes to the coordination number of local motifs. The first sharp diffraction peak can therefore be used to gauge when topological changes are likely to occur, events that transform network structures and their related physical properties.
Original languageEnglish
Article number214204
Number of pages5
JournalPhysical Review B : Condensed Matter and Materials Physics
Volume93
DOIs
Publication statusPublished - 22 Jun 2016

Fingerprint

Oxides
Diffraction
Metallic glass
Fractals
Diffraction patterns
Gages
Physical properties
Oxygen
oxides
Geometry
metallic glasses
coordination number
diffraction
fractals
diffraction patterns
physical properties
oxygen
geometry

Cite this

@article{649f33e7b1c9415b9d59dc61afc659da,
title = "Pressure-driven transformation of the ordering in amorphous network-forming materials",
abstract = "The pressure-induced changes to the structure of disordered oxide and chalcogenide network-forming materials are investigated on the length scales associated with the first three peaks in measured diffraction patterns. The density dependence of a given peak position does not yield the network dimensionality, in contrast to metallic glasses where the results indicate a fractal geometry with a local dimensionality of ~5/2. For oxides, a common relation is found between the intermediate-range ordering, as described by the position of the first sharp diffraction peak, and the oxygen-packing fraction, a parameter that plays a key role in driving changes to the coordination number of local motifs. The first sharp diffraction peak can therefore be used to gauge when topological changes are likely to occur, events that transform network structures and their related physical properties.",
author = "Anita Zeidler and Philip Salmon",
year = "2016",
month = "6",
day = "22",
doi = "10.1103/PhysRevB.93.214204",
language = "English",
volume = "93",
journal = "Physical Review B : Condensed Matter and Materials Physics",
issn = "1098-0121",
publisher = "American Physical Society",

}

TY - JOUR

T1 - Pressure-driven transformation of the ordering in amorphous network-forming materials

AU - Zeidler, Anita

AU - Salmon, Philip

PY - 2016/6/22

Y1 - 2016/6/22

N2 - The pressure-induced changes to the structure of disordered oxide and chalcogenide network-forming materials are investigated on the length scales associated with the first three peaks in measured diffraction patterns. The density dependence of a given peak position does not yield the network dimensionality, in contrast to metallic glasses where the results indicate a fractal geometry with a local dimensionality of ~5/2. For oxides, a common relation is found between the intermediate-range ordering, as described by the position of the first sharp diffraction peak, and the oxygen-packing fraction, a parameter that plays a key role in driving changes to the coordination number of local motifs. The first sharp diffraction peak can therefore be used to gauge when topological changes are likely to occur, events that transform network structures and their related physical properties.

AB - The pressure-induced changes to the structure of disordered oxide and chalcogenide network-forming materials are investigated on the length scales associated with the first three peaks in measured diffraction patterns. The density dependence of a given peak position does not yield the network dimensionality, in contrast to metallic glasses where the results indicate a fractal geometry with a local dimensionality of ~5/2. For oxides, a common relation is found between the intermediate-range ordering, as described by the position of the first sharp diffraction peak, and the oxygen-packing fraction, a parameter that plays a key role in driving changes to the coordination number of local motifs. The first sharp diffraction peak can therefore be used to gauge when topological changes are likely to occur, events that transform network structures and their related physical properties.

UR - http://dx.doi.org/10.1103/PhysRevB.93.214204

U2 - 10.1103/PhysRevB.93.214204

DO - 10.1103/PhysRevB.93.214204

M3 - Article

VL - 93

JO - Physical Review B : Condensed Matter and Materials Physics

JF - Physical Review B : Condensed Matter and Materials Physics

SN - 1098-0121

M1 - 214204

ER -