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Liquid-to-liquid crossover in the GaIn eutectic alloy

Journal Article · · Physical Review B

Liquid-liquid crossover is promising and closely related to the atomic dynamics during heating and cooling processes. Here we reveal a reversible structural crossover in the liquid Ga85.8In14.2 eutectic alloys by using in situ synchrotron x-ray diffraction and ab initio molecular dynamics simulation. A kink always appears on the temperature dependent behaviors of density, ratio of the second peak position to the first in the pair correlation function, coordination number, heat capacity, free energy, and atomic diffusivity in the temperature range of about 400–550 K. It is likely ascribed to atomic rearrangements of Ga and In atoms from a relative random packing at high temperatures to a relative nonuniform packing at low temperatures, in which In atoms prefer to have more In neighbors. This observation will promote more understanding of the liquid structure of eutectic alloys

Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
National Key Research and Development Program of China; Fundamental Research Funds for the Central Universities; National Natural Science Foundation of China (NSFC); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1392447
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 22 Vol. 95; ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

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