Europhys. Lett.
Volume 71, Number 5, September 2005
Page(s) 770 - 775
Section Condensed matter: structural, mechanical and thermal properties
Published online 03 August 2005
Europhys. Lett., 71 (5), pp. 770-775 (2005)
DOI: 10.1209/epl/i2005-10152-9

The eutectic composition on $\chem{Cd}$x$\chem{Pb}$1-x $\chem{F_2}$ phase diagram: A molecular-dynamics study

A. Picinin1, M. A. P. Silva2, J. P. Rino2 and G. Q. Hai1

1  Instituto de Física de São Carlos, Universidade de São Paulo Av. Trabalhador Sancarlense 400, 13560-970, São Carlos, SP-Brazil
2  Departamento de Física, Universidade Federal de São Carlos 13565-905, São Carlos, SP-Brazil

received 5 April 2005; accepted in final form 4 July 2005
published online 3 August 2005

A eutectic composition was observed, for the first time using molecular-dynamics (MD) simulation, for the $\chem{Cd}$x$\chem{Pb}$1-x $\chem{F_2}$ solid solutions. Simulations were performed on melting and cooling processes on these solid solutions for various compositions. It was observed that the initial addition of cadmium fluoride to the lead fluoride cubic lattice decreases the melting temperature of the resulting solid solution, leading to a eutectic composition with x=0.35, in perfect accord with experimental data. Solid solutions with higher cadmium concentrations present higher melting temperatures. Simulations on cooling from the melt, at various rates, indicate that the eutectic composition has a better glass-forming ability than the others compositions.

61.43.Bn - Structural modeling: serial-addition models, computer simulation.
65.40.-b - Thermal properties of crystalline solids.
66.30.-h - Diffusion in solids.

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