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Bimetallic Fe x Pt 1-x  alloys with the L1 0  and L1 2  structures have recently gained a lot of consideration in practical applications for solid-state devices, storage of ultra-high density magnetic data and biomedicine. This is due to their high magnetic and magnetocrystalline anisotropy, density, and coercivity. In order to gain knowledge on the structural, electronic and mechanical properties of the cubic and tetragonal Fe x Pt 1-x  alloys, we have calculated their equilibrium lattice constants, density of states, and elastic constants at 0 K, employing first-principles calculations. The calculated equilibrium lattice constants were found to be in good agreement with the experimental data to within 3 %. All independent elastic constants satisfy the necessary stability conditions for both cubic and tetragonal systems, suggesting mechanical stability. The shear anisotropic factors predict that the tetragonal Fe x Pt 1-x  crystals are highly anisotropic along the {001} plane than {100}. Moreover, the percentage of bulk (A B ) and shear (A G ) anisotropies revealed completely isotropic systems in the bulk and slightly anisotropic in shear modulus.

iop conference series. materials science and engineering

First-principles studies on the structural, electronic and mechanical properties of L1o and L12 FexPt1-x alloys