Magnetic moment distribution in Fe3−xCrxSi alloys

Waliszewski, J.; Dobrzyński, L.; Malinowski, A.; Satuła, D.; Szymański, K.; Prandl, W.; Brückel, Thomas; Schärpf, O.

doi:10.1016/0304-8853(94)90331-x

Cited by 51 publications

(31 citation statements)

References 16 publications

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“…Iron-based transition metal alloys show a great sensitivity to environmental effects [5], for instance, the definite site preference of Cr, Co or V in Fe-Al or Fe-Si systems even in the presence of disorder [6][7][8][9]. It is therefore interesting to study the trend of hyperfine fields in the stoichiometric alloy Fe 2 CrAl.…”

Section: Introductionmentioning

confidence: 98%

Mössbauer studies of hyperfine fields in disordered Fe2CrAl

2002

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Heusler-like alloy Fe 2 CrAl was prepared and studied. Structure determination was done by X-ray. The structure was found to conform to the B 2 type. Magnetic hyperfine fields in this sample were studied by the Mössbauer effect. The Mössbauer spectra were recorded over a range of temperature from 40 to 296 K. The Mössbauer spectra showed the co-existence of a paramagnetic part with a magnetic hyperfine portion at all recorded temperatures. Even with the distribution in the magnetic hyperfine field, the average hyperfine field follows the´T T c µ 3 2 law. The paramagnetic part of the hyperfine field is explained in terms of the clustering of Cr atoms.

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Section: Introductionmentioning

confidence: 98%

Mössbauer studies of hyperfine fields in disordered Fe2CrAl

2002

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“…The preference of Mn to occupation of B-sites is not so clear in Fe 3 Al alloys [12,13]. In the case of chromium substituting for iron the number of experiments [14][15][16] showed that chromium does not show any preference in Fe 3 Si while there is certain preference to occupation of B-sites in Fe 3 Al. One should immediately note that the case of Fe 3 Al as a matrix poses a problem.…”

Section: Introduction: Preferential Occupation Of Sitesmentioning

confidence: 99%

Magnetic Properties of DO₃-Type Alloys Based on Fe₃Si and Fe₃Al

Parzych

Jankowska-Kisielińska

Dobrzyński

2010

Acta Phys. Pol. A

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The interest in magnetic properties of DO 3 -type alloys stems from their ability to exhibit dependence of magnetic moments on local environment. It is shown that both, static and dynamic properties of the alloys based on Fe 3 Si and Fe 3 Al require further investigations. This concerns mainly the problem of selective substitution of chromium for iron, as well as spin dynamics, the latter problem is illustrated on the example of measured spin waves in Sendust.

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“…Interestingly, Cr seems to distribute almost randomly at A, B, and C sites in Fe 3−x Cr x Si. 66 Reference 34 has considered the question of preferential occupation of various sites in the Fe 3 Ga matrix via band-theory based total energy computations.…”

Section: 65mentioning

confidence: 99%

Electronic structure and magnetism ofFe3−xVxX
Bansil
¹
,
Kaprzyk
²
,
Mijnarends
³

et al. 1999
Phys. Rev. B

375

249

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We present first principles charge-and spin-selfconsistent electronic structure computations on the Heusler-type disordered alloys Fe 3−x V x X for three different metalloids X= (Si, Ga and Al). In these calculations we use the methodology based on the Korringa-Kohn-Rostoker formalism and the coherent-potential approximation (KKR-CPA), generalized to treat disorder in multi-component complex alloys. Exchange correlation effects are incorporated within the local spin density (LSD) approximation. Total energy calculations for Fe 3−x V x Si show that V substitutes preferentially on the Fe(B) site, not on the Fe(A,C) site, in agreement with experiment. Furthermore, calculations have been carried out for Fe 3−x V x X alloys (with, x = 0.25, 0.50 and 0.75), together with the end compounds Fe 3 X and Fe 2 VX, and the limiting cases of a single V impurity in Fe 3 X and a single Fe(B) impurity in Fe 2 VX. We delineate clearly how the electronic states and magnetic moments at various sites in Fe 3−x V x X evolve as a function of the V content and the 1 metalloid valence. Notably, the spectrum of Fe 3−x V x X (X=Al and Ga) develops a pseudo-gap for the majority as well as minority spin states around the Fermi energy in the V-rich regime which, together with local moments of Fe(B) impurities, may play a role in the anomalous behavior of the transport properties. The total magnetic moment in Fe 3−x V x Si is found to decrease non-linearly, and the Fe(B) moment to increase with increasing x; this is in contrast to expectations of the 'local environment' model, which holds that the total moment should vary linearly while the Fe(B) moment should remain constant. The common-band model which describes the formation of bonding and antibonding states with different weights on the different atoms, however, provides insight into the electronic structure of this class of compounds.

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Magnetic moment distribution in Fe3−xCrxSi alloys

Cited by 51 publications

References 16 publications

Mössbauer studies of hyperfine fields in disordered Fe2CrAl

Mössbauer studies of hyperfine fields in disordered Fe2CrAl

Magnetic Properties of DO₃-Type Alloys Based on Fe₃Si and Fe₃Al

Electronic structure and magnetism ofFe3−xVxX
Bansil
¹
,
Kaprzyk
²
,
Mijnarends
³

et al. 1999
Phys. Rev. B

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Magnetic moment distribution in Fe3−xCrxSi alloys

Cited by 51 publications

References 16 publications

Mössbauer studies of hyperfine fields in disordered Fe2CrAl

Mössbauer studies of hyperfine fields in disordered Fe2CrAl

Magnetic Properties of DO3-Type Alloys Based on Fe3Si and Fe3Al

Electronic structure and magnetism ofFe3−xVxXBansil1, Kaprzyk2, Mijnarends3 et al. 1999Phys. Rev. B

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Magnetic Properties of DO₃-Type Alloys Based on Fe₃Si and Fe₃Al

Electronic structure and magnetism ofFe3−xVxX
Bansil
¹
,
Kaprzyk
²
,
Mijnarends
³

et al. 1999
Phys. Rev. B