Local structure of disordered Au-Cu and Au-Ag alloys

A. I. Frenkel, V. Sh Machavariani, A. Rubshtein, Yu Rosenberg, Yu Rosenberg, A. Voronel, E. A. Stern

Research output: Contribution to journalArticlepeer-review


X-ray-absorption fine structure (XAFS) and x-ray-diffraction (XRD) measurements of disordered alloys AuxCu1-x and Au0.5Ag0.5 prepared by melt spinning were performed. In the Au0.5Ag0.5 alloy, no significant local deviations of the atoms from the average fcc lattice were detected while in AuxCu1-x alloys, significant deviations of atoms from the average fcc lattice were found. Mean-square vibrations of the Cu-Cu distances revealed by the XAFS in AuxCu1-x alloys indicate the weakening of contact between Cu atoms in the dilute limit. Our computer simulation for AuxCu1-x clusters of 105 atoms reproduces the main features of both the XAFS and XRD data.

Original languageEnglish
Pages (from-to)9364-9371
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number14
StatePublished - 1 Oct 2000


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