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EAM potentials for BCC, FCC and HCP metals with farther neighbor atoms

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Abstract

The modified analytic embedded atom method (EAM) theory considering farther neighbor atoms is improved. We not only adopt an end processing function and an enhanced smooth continuous condition of the pair potential, but also adjust model parameters of multi-body potential by fitting cohesion energies, mono-vacancy formation energies, Rose equation curves, energy differences between several structures, elastic parameters and the equilibrium conditions of crystals. The calculation results of structure energy differences misfit the experiment data for several metallic materials in the unimproved EAM, because its model parameters have not considered these differences. After the modification, the coincidence degree of the structure energy—the reduced distance r/r 1 from the present model with that from the Rose equation is greatly improved for Cr. The calculated results of structure stabilities are in good agreement with experiment data and other calculated results for all considered metals, significantly better than the unimproved model with farther neighbor atoms.

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Authors and Affiliations

  1. Department of Energy Science, Kim Il Sung University, Pyongyang, Democratic People’s Republic of Korea

    Hak-Son Jin, Jong-Do An & Yon-Song Jong

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  1. Hak-Son Jin
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  2. Jong-Do An
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  3. Yon-Song Jong
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Correspondence to Hak-Son Jin.

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Jin, HS., An, JD. & Jong, YS. EAM potentials for BCC, FCC and HCP metals with farther neighbor atoms. Appl. Phys. A 120, 189–197 (2015). https://doi.org/10.1007/s00339-015-9149-5

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  • DOI: https://doi.org/10.1007/s00339-015-9149-5

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