The formation of the magnetic moments in disordered binary alloys of metal-metalloid type

Аржников, А. К.; Добышева, Л. В.

doi:10.1016/0304-8853(92)90296-z

Cited by 21 publications

(8 citation statements)

References 17 publications

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“…Earlier similar results have been obtained for disordered alloys using a two-band Hubbard model [24]. Such a behavior of the local magnetic moments allows one to interpret the experiments using the modified JaccarinoWalker model, the main idea of which is that the local magnetic moment at a transition-metal atom is determined by the chemical composition of the nearest environment and only weakly depends on the overall concentration.…”

Section: Article In Presssupporting

confidence: 56%

Formation and ordering of local magnetic moments in Fe–Al alloys

Аржников

Добышева

Timirgazin

2008

Journal of Magnetism and Magnetic Materials

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The density functional theory is used to study the local magnetic moments in Fe-Al alloys depending on concentration (from 29 to 44 at% Al) and the Fe nearest environment. We have found three different solutions for the system: a spin-spiral wave (SSW) which has a minimum energy and two collinear states, a ferromagnetic one and a state with both positive and negative Fe magnetic moments (the Fe atoms with many neighboring Al atoms around them have negative magnetic moments, while the other Fe atoms-positive). Both the SSW and the negative Fe moments agree with the experiments. Magnetization curves taken from the literature are analyzed. The assumption of percolation character of the size distribution of magnetic clusters describes well the experimental superparamagnetic behavior above 150 K. r

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Section: Article In Presssupporting

confidence: 56%

Formation and ordering of local magnetic moments in Fe–Al alloys

Аржников

Добышева

Timirgazin

2008

Journal of Magnetism and Magnetic Materials

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“…A self-consistent calculation of the local magnetic moment of atom B as a function of the concentration of the nonmagnetic atoms A in disordered binary alloys of metal ͑B͒-metalloid ͑A͒ type (A x B 1Ϫx ) was performed by Ref. 34. Figure 6 shows the results.…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Reduced magnetic moment per atom in small Ni and Co clusters embedded in AlN

Zanghi

Teodorescu

Pétroff

et al. 2001

Journal of Applied Physics

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“…There also exists third mechanism of the LMM reduction due to the difference in the impurity-potential screening by d-electrons (the difference in pushing out the impurity levels by the bands with spin up and down) [7]. At the same time, our "first-principles" calculations and the mathematical treatment [9][10] testify that, to an accuracy of 10 ÷ 15%, the LMMs in disordered alloys are independent of concentration and governed by the number of nearest metalloid atoms only.…”

Section: The Local Magnetic Momentmentioning

confidence: 99%