Evenson, Z and Yang, F and Simeoni, G and Meyer, A (2016) Self-diffusion and microscopic dynamics in a gold-silicon liquid investigated with quasielastic neutron scattering. Applied Physics Letters, 108 (12). American Institute of Physics (AIP). ISSN 0003-6951.
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Abstract
We use incoherent quasielastic neutron scattering to study the atomic dynamics of gold in a eutectic Au81Si19 melt. Despite the glass-forming nature of this system, the gold self-diffusivity displays an Arrhenius behavior with a low activation energy characteristic of simple liquids. At high temperatures, long-range transport of gold atoms is well described by hydrodynamic theory with a simple exponential decay of the self-correlation function. On cooling towards the melting temperature, structural relaxation crosses over to a highly stretched exponential behavior. This suggests the onset of a heterogeneous dynamics, even in the equilibrium melt, and is indicative of a very fragile liquid
Item URL in elib: | https://elib.dlr.de/109864/ | |||||||||||||||
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Document Type: | Article | |||||||||||||||
Title: | Self-diffusion and microscopic dynamics in a gold-silicon liquid investigated with quasielastic neutron scattering | |||||||||||||||
Authors: |
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Date: | March 2016 | |||||||||||||||
Journal or Publication Title: | Applied Physics Letters | |||||||||||||||
Refereed publication: | Yes | |||||||||||||||
Open Access: | Yes | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | Yes | |||||||||||||||
In ISI Web of Science: | Yes | |||||||||||||||
Volume: | 108 | |||||||||||||||
Publisher: | American Institute of Physics (AIP) | |||||||||||||||
ISSN: | 0003-6951 | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | Dynamics, Gold Atoms, hydrodynamic theory | |||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||
HGF - Program: | Space | |||||||||||||||
HGF - Program Themes: | Research under Space Conditions | |||||||||||||||
DLR - Research area: | Raumfahrt | |||||||||||||||
DLR - Program: | R FR - Research under Space Conditions | |||||||||||||||
DLR - Research theme (Project): | R - Material Design and New Materials | |||||||||||||||
Location: | Köln-Porz | |||||||||||||||
Institutes and Institutions: | Institute of Materials Physics in Space | |||||||||||||||
Deposited By: | Hardt, Kim | |||||||||||||||
Deposited On: | 03 Jan 2017 08:55 | |||||||||||||||
Last Modified: | 05 Sep 2019 13:59 |
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