Abstract

The transition process from ordered SmCo 5 (CaCu 5-type) to disordered SmCo 7 (TbCu 7-type) is successfully simulated by using inverted ab initio pair potentials. The structure properties of this disordered TbCu 7-type compound, including lattice constants, X-ray diffraction, phase stability, site preference have been calculated and the calculated results are in good agreement with the experimental data. Also, a new structure deformation of 3g sublattice in SmCo 7− x Ti x is reported.

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