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Unusual coordination structure in undercooled eutectic Ga-In alloy melt.
- Source :
- Europhysics Letters; Aug2014, Vol. 107 Issue 3, p1-1, 1p
- Publication Year :
- 2014
-
Abstract
- The local structures in the normal and undercooled liquid eutectic Ga-In alloy are investigated by using X-ray absorption spectroscope (XAS), X-ray diffractometer (XRD) and the ab initio molecular dynamics (AIMD) simulations. The results from these three techniques all indicate that the nearest-neighbor coordination number decreases with decreasing temperature in the liquid eutectic Ga-In alloy. Moreover, the nearest-neighbor interatomic distance increases and the local atomic packing density decreases with decreasing temperature. The X-ray absorption near edge structure (XANES) measurement shows that the atomic rearrangement at the undercooled temperature results in the formation of low-coordinated polyhedron clusters with high symmetries. This finding provides a new perspective for understanding the liquid-solid transition in undercooled conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02955075
- Volume :
- 107
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Europhysics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 97376758
- Full Text :
- https://doi.org/10.1209/0295-5075/107/36004