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- W1965431043 endingPage "8747" @default.
- W1965431043 startingPage "8739" @default.
- W1965431043 abstract "Local moment disorder, defined as a random arrangement of two distinct magnetic states of the same atomic species in a metallic system, is discussed in the framework of the Korringa-Kohn-Rostoker coherent-potential approximation combined with the local-density-functional method and applied to Fe-Cr, Ni-Fe, and Ni-Mn alloys. For Fe-Cr alloys it is found that the disordered-moment state has a higher energy than the ferromagnetic state in the entire region of Fe concentrations. Thus the theory fails to explain the spin-glass state observed around ${mathrm{Fe}}_{0.14}$${mathrm{Cr}}_{0.86}$. The theory, on the other hand, can explain the transition of Ni-Fe alloys from ferromagnetism to paramagnetism around the Invar region; the transition, however, is of first order, in contrast to experimental indications. The volume contraction due to the reversal of the magnetic-moment alignment from parallel to antiparallel with respect to the bulk magnetization is also discussed in connection with the Invar anomalies. For Ni-Mn alloys the calculation shows that, when the Mn concentration is larger than 15 at. %, magnetic states with local moments parallel and antiparallel to the average magnetization coexist even in the ferromagnetic region. The results are quite consistent with NMR experiments, which clearly show the existence of the antiparallel Mn local moments in addition to the parallel ones." @default.
- W1965431043 created "2016-06-24" @default.
- W1965431043 creator A5031965697 @default.
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- W1965431043 date "1993-04-01" @default.
- W1965431043 modified "2023-10-14" @default.
- W1965431043 title "Local moment disorder in ferromagnetic alloys" @default.
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- W1965431043 doi "https://doi.org/10.1103/physrevb.47.8739" @default.
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