Self-diffusion in Germanium-rich liquid Germanium-Nickel investigated by quasielastic neutron scattering

Weis H, Kargl F, Yang F, Unruh T, Koza MM, Meyer A (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Physica Scripta Institute of Physics

Book Volume: 99

Article Number: 125927

Journal Issue: 12

DOI: 10.1088/1402-4896/ad88b2

Abstract

Wereport atomic dynamics in liquid Ge98Ni2 measured using quasielastic neutron scattering. Isotopic substitution enabled to separately determine Ge and Ni self-diffusion with high accuracy. The Ge selfdiffusion coefficient in liquid Ge98Ni2 is equal within error bars to that in pure liquid Ge. However, the Ni self-diffusion coefficient lies at least 30% below the Ge self-diffusion coefficient. This behaviour differs from previously reported atomic dynamics in Ge-rich GeAu, GeSi, GeIn and GeCe melts, where no separation of the self-diffusion coefficients between the minor component and Ge is observed. The change of the atomic dynamics already at an addition of 2 at% Ni points to electronic and chemical origins in Ge98Ni2. Moreover, the slower self-diffusion of the minor component compared to Ge might be associated with two different local structural environments, as observed in Ge-Ni alloys at higher Ni concentration.

Involved external institutions

Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) / German Aerospace Center DE Germany (DE) Technische Universität München (TUM) DE Germany (DE) Institute Laue-Langevin (ILL) FR France (FR)

How to cite

APA:

Weis, H., Kargl, F., Yang, F., Unruh, T., Koza, M.M., & Meyer, A. (2024). Self-diffusion in Germanium-rich liquid Germanium-Nickel investigated by quasielastic neutron scattering. Physica Scripta, 99(12). https://doi.org/10.1088/1402-4896/ad88b2

MLA:

Weis, H., et al. "Self-diffusion in Germanium-rich liquid Germanium-Nickel investigated by quasielastic neutron scattering." Physica Scripta 99.12 (2024).

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