Numerical Studies on the Magnetism of Fe-Ni-Mn Alloys in the Invar Region

Details Numerical Studies on the Magnetism of Fe-Ni-Mn Alloys in the Invar Region Numerical Studies on the Magnetism of Fe-Ni-Mn Alloys in the Invar Region

1995-09-27

arxiv.org/abs/cond-mat/9509167v1

Physics

Condensed Matter

12 pages (Latex, to be applied 2 times) + 13 figures (eps-files)

Scientific paper

By means of self-consistent semi-empirical LCAO calculations we study the itinerant magnetism of (Fe_{0.65}Ni_{0.35})_{1-y} Mn_y alloys for y between 0 and 0.22 at T=0 K, neglecting only the transverse spin components. We find that the magnetic behaviour is quite complicated on a local scale. In addition to ferromagnetic behaviour, also metastable spin-glass-like configurations are found. In the same approach, using a direct numerical calculation by the Kubo-Formalism without any fit parameters, we also calculate the electrical conductance in the magnetic state and find that the $y$-dependence observed in the experiments is well reproduced by our calculations, except of an overall factor of rougly 5, by which our resistivities are too large.

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