TY  - JOUR
AU  - Drescher, Sophie
AU  - Kuzmin, Aleksejs
AU  - Welter, Edmund
AU  - Freudenberger, Jens
AU  - Smekhova, Alevtina
TI  - Component-dependent lattice distortions and atomic scale insights in multi-component Au-Cu-Ni-Pd-Pt based alloys
JO  - Nano research
VL  - 18
IS  - 1
SN  - 1998-0124
PB  - Springer
M1  - PUBDB-2024-06939
SP  - 94907122
PY  - 2025
N1  - it is currently published online at https://www.sciopen.com/article/10.26599/NR.2025.94907122 (as just accepted manuscript); the final version should be available till the end of the year.
AB  - In our study, the composition-dependent effects of atomic displacements in Au-Cu-Ni-Pd-Pt based alloys, comprising elements with large differences in atomic radii, are investigated at the atomic scale. Two alloys—the equimolar AuCuNiPdPt and AuCuNiPd—have been characterized using multi-edge extended X-ray absorption fine structure spectroscopy (EXAFS) in conjunction with reverse Monte Carlo simulations (RMC) at room temperature. The statistically-averaged component-dependent pair distribution functions (PDFs), which represent the distribution of atoms around the assumed regular fcc lattice positions, reveal a shift of their first peak to shorter distances and a pronounced asymmetry in atomic distribution only for atoms with small radii (Cu/Ni). The analysis demonstrates that small atoms (Cu/Ni) are significantly more displaced from the expected lattice positions as compared to large atoms (Au/Pt). Furthermore, there are indications of preferential next-neighbour bonding that changes depending on the alloy composition. The most pronounced changes in the PDFs were found solely for Pd. With this study, we provide a basis for a deeper understanding of the composition-dependent atomic arrangement in chemically complex solid solutions.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001408207500001
DO  - DOI:10.26599/NR.2025.94907122
UR  - https://bib-pubdb1.desy.de/record/617633
ER  -