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Original Articles

Thermodynamic properties of some liquid metals using pseudopotential theory

Pages 723-735 | Received 01 Oct 2007, Accepted 03 Apr 2009, Published online: 10 Dec 2010
 

Abstract

The Gibbs–Bogoliubov (GB) inequality is used to evaluate the Helmholtz free energy of some liquid metals. The structural contribution to the Helmholtz free energy is investigated by adopting a Percus–Yevick (PY) hard sphere fluid. A well known single parametric empty core (EMC) local pseudopotential of Ashcroft is applied to describe the electron-ion interaction along with five different local field correction functions viz Hartree (HR), Taylor (TY), Ichimaru–Utsumi (IU), Farid et al. (FR) and Sarkar et al. (SR). 2.18 to 28% of the influence on the Helmholtz free energy is concluded as due to these local field correction functions with respect to the static HR dielectric function. A qualitative agreement with experimental or theoretical results is achieved.

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