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The concentrational behavior of the Curie temperature that describes the experiments for disordered alloys Fe-M (M = Al, Si, Ga, Sn) at concentrations of M lower than 10 at.% was obtained in the framework of the Hubbard model. The influence of the spin and charge fluctuations was investigated.
The electronic properties of Fe_{3}Al were determined experimentally, with the use of the Mossbauer spectroscopy, and theoretically. The band structure of the compounds was investigated applying the self-consistent tight-binding linear muffin tin orbital method. The calculated Fermi contact term of hyperfine fields and the isomer shifts are in good agreement with the values resulting from analysis...
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