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Structure of eutectic liquids in the Au-Si, Au-Ge, and Ag-Ge binary systems by neutron diffraction


Reference:

Chirawatkul, P., Zeidler, A., Salmon, P. S., Takeda, S., Kawakita, Y., Usuki, T. and Fischer, H., 2011. Structure of eutectic liquids in the Au-Si, Au-Ge, and Ag-Ge binary systems by neutron diffraction. Physical Review B, 83 (1), 014203.

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Official URL:

http://dx.doi.org/10.1103/PhysRevB.83.014203

Abstract

Neutron diffraction was used to investigate the structure of the liquid alloys Au0.81Si0.19, Au0.72Ge0.28, and Ag0.74Ge0.26 with composition at or near the eutectic. For a given alloy, the measured pair distribution function is described over a wide range of distances, from 5–6 Å to beyond 20 Å, by an exponentially damped oscillatory function with a decay length and wavelength of oscillation related to the half-width at half-maximum of the principal peak in the total structure factor and to the position of this peak, respectively. This behavior is expected from solutions of the Ornstein-Zernike equations for simple pair potentials. There is no need to invoke the existence of a fractal network, as suggested by a recent analysis of the diffraction patterns measured for amorphous metallic alloys, to account for the experimental results. A reconsideration of the diffraction data for these amorphous alloys points to the same conclusion.

Details

Item Type Articles
CreatorsChirawatkul, P., Zeidler, A., Salmon, P. S., Takeda, S., Kawakita, Y., Usuki, T. and Fischer, H.
DOI10.1103/PhysRevB.83.014203
DepartmentsFaculty of Science > Physics
RefereedYes
StatusPublished
ID Code22635

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