Local structure in magnetostrictive melt-spun<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>Fe</mml:mtext></mml:mrow><mml:mrow><mml:mn>80</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Ga</mml:mtext></mml:mrow><mml:mrow><mml:mn>20</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>alloys

Pascarelli, S.; Ruffoni, M. P.; Turtelli, R. Sato; Kübel, Frank; Größinger, R.

doi:10.1103/physrevb.77.184406

Cited by 45 publications

(31 citation statements)

References 21 publications

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“…The value of is mini mum; this may be related to the closeness of the char acteristic length of the Al-Al bond and a Fe , while the lengths of X-X bonds for the remaining dissolved ele ments are considerably shorter ( Table 2). The obtained value of for the Ga-Ga pair agrees well with the measured value [24].…”

Section: Calculation Resultssupporting

confidence: 80%

Local deformations and chemical bonding in Fe-X (X = Si, Al, Ga, Ge) soft magnetic alloys

Petrik

Gornostyrev

2013

Phys. Metals Metallogr.

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Abstract-Dilute alloys based on ferromagnetic bcc iron modified by 3p (Al, Si) and 4p (Ga, Ge) elements are studied using the methods of the density functional theory. It is shown that the local deformations and solution energies depend on the position of an alloying element in the periodic system. The nature of Fe-X chemical bonding varies from weak metallic in Fe-Ga to strong quasi covalent in Fe-Si, which determines the values of local deformations in these alloys. The formation of pairs of impurity atoms in the position of the next nearest neighbors leads to tetragonal lattice deformations, the value of which is highest for Si and Ge. The role of local deformations in the formation of unusual magnetic properties of Fe-X alloys is dis cussed.

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Section: Calculation Resultssupporting

confidence: 80%

Local deformations and chemical bonding in Fe-X (X = Si, Al, Ga, Ge) soft magnetic alloys

Petrik

Gornostyrev

2013

Phys. Metals Metallogr.

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“…Thus, we performed EXAFS in two representative samples deposited in the ballistic and diffusive regimes to analyze the influence of the flow regime on the local atomic order. Furthermore, XAFS, as previously employed by other authors to study Fe-Ga alloys with Ga content of 20 at.%, has proved to be a very useful tool in these kinds of systems [30]. The EXAFS spectra reduced from the XAFS raw data are presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of the sputtering flow regime on the structural properties and magnetic behavior of Fe-Ga thin films (Ga ∼ 30 at.%)

2016

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In this paper we analyze the structure of Fe-Ga layers with a Ga content of ∼30 at.% deposited by the sputtering technique under two different regimes. We also studied the correlation between the structure and magnetic behavior of the samples. Keeping the Ar pressure fixed, we modified the flow regime from ballistic to diffusive by increasing the distance between the target and the substrate. X-ray diffraction measurements have shown a lower structural quality when growing in the diffusive flow. We investigated the impact of the growth regime by means of x-ray absorption fine structure (XAFS) measurements and obtained signs of its influence on the local atomic order. Full multiple scattering and finite difference calculations based on XAFS measurements point to a more relevant presence of a disordered A2 phase and of orthorhombic Ga clusters on the Fe-Ga alloy deposited under a diffusive regime; however, in the ballistic sample, a higher presence of D0 3 /B2 phases is evidenced. Structural characteristics, from local to long range, seem to determine the magnetic behavior of the layers. Whereas a clear in-plane magnetic anisotropy is observed in the film deposited under ballistic flow, the diffusive sample is magnetically isotropic. Therefore, our experimental results provide evidence of a correlation between flow regime and structural properties and its impact on the magnetic behavior of a rather unexplored compositional region of Fe-Ga compounds.

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“…% Ga polycrystalline ribbon. 19 In principle, the volume fraction of each texture component can be measured and then used to calculate the contribution to the measured strain from each texture component. In practice, there are difficulties in accurately determining the volume fraction of each texture component in the same region measured by DiffXAS, considering the influence of spatial distribution of the texture components on the measurement, and obtaining reliable results from a least-square fit with many variables.…”

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confidence: 99%

Experimental exploration of the origin of magnetostriction in single crystalline iron

Xing

Lograsso

Ruffoni

et al. 2010

Applied Physics Letters

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The magnetostrictive atomic strain in a pure Fe single crystal was measured by differential x-ray absorption spectroscopy. The obtained tetragonal magnetostriction constant, (3/2)λ100, was determined to be 45 ppm, consistent with the previously reported theoretical value calculated from a spin-orbit coupling theory. These results provide a foundation for understanding the origin of magnetostriction in pure Fe as well as Fe-based binary alloys.

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Local structure in magnetostrictive melt-spunFe80Ga20alloys

Cited by 45 publications

References 21 publications

Local deformations and chemical bonding in Fe-X (X = Si, Al, Ga, Ge) soft magnetic alloys

Local deformations and chemical bonding in Fe-X (X = Si, Al, Ga, Ge) soft magnetic alloys

Influence of the sputtering flow regime on the structural properties and magnetic behavior of Fe-Ga thin films (Ga ∼ 30 at.%)

Experimental exploration of the origin of magnetostriction in single crystalline iron

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