On the magnetic structure of the ground state of ordered Fe-Al alloys

Елсуков, Е. П.; Воронина, Э. В.; Королев, А. В.; Elsukova, Anna; Godovikov, S. K.

doi:10.1134/s0031918x0707006x

Cited by 13 publications

(22 citation statements)

References 37 publications

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“…We should note that the SSW wavelength obtained both by us and in Rhombes and triangles denote the AFM and FM, respectively, first-principles results (the data are for the equilibrium lattice parameters), squares are for the experimental data from Ref. [22,23]. Star shows the average moment calculated here from the high-temperature superparamagnetic behavior obtained in experiments in Ref.…”

Section: Spiral Magnetic Structuresmentioning

confidence: 95%

“…5 shows also the experimental data from Ref. [23] obtained by extrapolation of magnetization from high magnetic fields, Ref. [22], and the average moment calculated in the previous section from the high-temperature superparamagnetic behavior experimentally obtained in Ref.…”

Section: Article In Pressmentioning

confidence: 97%

“…For example, as shown in Ref. [4] the thermomagnetic hysteresis in these alloys is solely a consequence of the magnetic hysteresis. Recently, neutron powder diffraction has shown that at low temperature the magnetic order is governed by the spin-density waves (SDWs) [5].…”

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

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: Spiral Magnetic Structuresmentioning

confidence: 95%

Section: Article In Pressmentioning

confidence: 97%

See 1 more Smart Citation

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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“…Small disorder present in the alloys inuences strongly electronic structure as well as magnetic properties [6]. In order to explain magnetic properties of the alloys, local eects should be taken into account [7]. This problem is studied theoretically in the present paper for T = Cr and Mn.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structure and Ordering Degree in Fe₃Al Alloy Doped with Transition Metals. Ab Initio Study

Dobrzyński

2012

Acta Phys. Pol. A

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Fe3Al alloy crystallizes in DO3-type structure. In the perfectly ordered alloy there are two nonequivalent sublattices (A,C) and B, which are occupied by Fe atoms, whereas all D sites are taken by metalloid. Such perfect ordering is, however, dicult to achieve experimentally, and some disorder between BD as well as (A,C)D sublattices typically appears in real samples. This disorder modies strongly electronic structure and magnetic properties. The aim of this contribution is to investigate total energy dependence of atomic exchange of sites between BD and (A,C)D positions in Fe3Al as well as in alloys doped with transition metals using ab-initio technique. Furthermore, dependence of electronic and magnetic properties of Fe3Al-based alloys on the crystallographic ordering is thoroughly investigated.

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“…Moreover, the relative simplicity of FeAl alloys in both the composition and structure (up to 70 at. % EPJ Web of Conferences Al) and their and magnetic properties are up to date an object of numerous experimental and theoretical investigations [9].…”

Section: Introductionmentioning

confidence: 99%

Structural, microstructural and Mössbauer studies of nanocrystalline Fe_100-xAl_xpowders elaborated by mechanical alloying

Boukherroub

Guittoum

Souami

et al. 2012

EPJ Web of Conferences

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Abstract. Nanocrystalline Fe 100-x Al x powders (x= 25, 30, 34 and 40 at %) were prepared by the mechanical alloying process using a vario-planetary high-energy ball mill for a milling time of 35 h. The formation and physical properties of the alloys were investigated as a function of Al content by means of X-ray diffraction, scanning electron microscopy (SEM), energy dispersive X-ray and Mössbauer spectroscopy. For all Fe 100-x Al x samples, the complete formation of bcc phase was observed after 35 h of milling. As Al content increases, the lattice parameter increases, whereas the grain size decreases from 106 to 12 nm. The powder particle morphology for different compositions was observed by SEM. The Mössbauer spectra were adjusted with a singlet line and a sextet containing two components. The singlet was attributed to the formation of paramagnetic A2 disordered structure rich with Al. About the sextet, the first component indicated the formation of Fe clusters/ Fe-rich phases; however, the second component is characteristic of disordered ferromagnetic phase.

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On the magnetic structure of the ground state of ordered Fe-Al alloys

Cited by 13 publications

References 37 publications

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

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

Electronic Structure and Ordering Degree in Fe₃Al Alloy Doped with Transition Metals. Ab Initio Study

Structural, microstructural and Mössbauer studies of nanocrystalline Fe_100-xAl_xpowders elaborated by mechanical alloying

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On the magnetic structure of the ground state of ordered Fe-Al alloys

Cited by 13 publications

References 37 publications

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

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

Electronic Structure and Ordering Degree in Fe3Al Alloy Doped with Transition Metals. Ab Initio Study

Structural, microstructural and Mössbauer studies of nanocrystalline Fe100-xAlxpowders elaborated by mechanical alloying

Contact Info

Product

Resources

About

Electronic Structure and Ordering Degree in Fe₃Al Alloy Doped with Transition Metals. Ab Initio Study

Structural, microstructural and Mössbauer studies of nanocrystalline Fe_100-xAl_xpowders elaborated by mechanical alloying