Abstract
Quasielastic neutron scattering has been used to investigate atomic motion in a very fragile binary metallic melt and a multicomponent bulk glass-forming metallic melt. Both melts show a breakdown of the Stokes–Einstein relation and display a change in the slope of In D dependence on In(η/T). We also observed that the values for the exponent in the fractional Stokes–Einstein relation are not in the commonly observed range for Cu46Zr42Al7Y5 melts. At low temperatures, the deviation from the Stokes–Einstein law is very significant and can be expressed in the form of a power law with exponent ξ=−1.82±0.08. The change in the slope is found to be associated with a change in friction coefficient while increasing the packing density of the melt. The abrupt change in the value of friction coefficient is independent of packing density, but it occurs at a common value of ζ=(3.2±0.1)×10−12 kg s−1 in these melts.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
