Thermodynamic Properties of Transition Metals Using Face-Centered-Cubic Lattice Model with Renormalized Potentials

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The thermodynamic properties of transition metals are studied by introducing face-centered cubic (FCC) lattice model. In order to treat actual systems as quantitatively as possible, empirical second moment approximation (SMA) potentials proposed by Rosato et al. and by Cleri et al., which have been used widely for molecular dynamics (MD) simulations, are employed. To overcome shortcomings of lattice-gas models such as neglecting internal entropy of the system, the potential is mapped onto FCC lattice using the renormalization technique. It is found that the computed linear thermal expansion coefficients agree well with the results of MD simulations.

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