Surface structure of the liquid Au72Ge28 eutectic phase: X-ray reflectivity

P. S. Pershan, S. E. Stoltz, S. Mechler, O. G. Shpyrko, A. Y. Grigoriev, V. S. K. Balagurusamy, B. H. Lin, and M. Meron
Phys. Rev. B 80, 125414 – Published 16 September 2009

Abstract

The surface structure of the liquid phase of the Au72Ge28 eutectic alloy has been measured using resonant and nonresonant x-ray reflectivity and grazing incidence x-ray diffraction. In spite of the significant differences in the surface tension of liquid Ge and Au the Gibbs adsorption enhancement of Ge concentration at the surface is minimal. This is in striking contrast to all the other binary alloys with large differences in the respective surface tensions measured up to date. In addition there is no evidence of the anomalous strong surface layering or in-plane crystalline order that has been reported for the otherwise quite similar liquid Au82Si18 eutectic. Instead, the surface of eutectic Au72Ge28 is liquidlike and the layering can be explained by the distorted crystal model with only slight modifications to the first layer.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 28 April 2009

DOI:https://doi.org/10.1103/PhysRevB.80.125414

©2009 American Physical Society

Authors & Affiliations

P. S. Pershan, S. E. Stoltz, and S. Mechler

  • Department of Physics and SEAS, Harvard University, Cambridge, Massachusetts 02138, USA

O. G. Shpyrko

  • Department of Physics, University of California–San Diego, San Diego, La Jolla, California 92093, USA

A. Y. Grigoriev

  • Department of Physics and Engineering Physics, The University of Tulsa, Tulsa, Oklahoma 74104, USA

V. S. K. Balagurusamy

  • Department of Physics, Brown University, Providence, Rhode Island 02912, USA

B. H. Lin and M. Meron

  • CARS, University of Chicago, Chicago, Illinois 60637, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 80, Iss. 12 — 15 September 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×