Crossover to striped magnetic domains in Fe1−xGax magnetostrictive thin films

Barturen, Mariana Gil; Salles, B. Rache; Schio, P.; Milano, J.; Butera, A.; Bustingorry, Sebastián; Ramos, C.A.; Oliveira, A. J. A. de; Eddrief, M.; Lacaze, Emmanuelle; Giligny, François; Etgens, V. H.; Marangolo, M.

doi:10.1063/1.4748122

Cited by 62 publications

(71 citation statements)

References 12 publications

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“…Thus, the features of this sample can be a combination of the existence of both a more prominent presence of a disordered A2 phase with respect to the ordered D0 3 /B2 phases and of orthorhombic Ga clusters. A number of papers studied Fe-Ga thin films [6,[11][12][13][14][15][16][17][32][33][34] and, more specifically, deposition by sputtering [11][12][13][14][15][16][17], although few papers explore thin films with the composition range studied in this paper [6,11,35]. The paper by Dunlap et al [11], in which they studied sputtered Fe-Ga alloys with a (110) texture, is the most similar to the current case.…”

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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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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“…However, the reported magnetostriction of Fe-Ga alloys is 400 ppm, just one fifth of that of TbDyFe alloys. [4][5][6][7][8][9] The magnetostriction of Fe-Ga is altered by doping with a third element. [10][11][12][13][14][15][16][17] Doping with interstitial elements B, C, and N slightly increases the magnetostriction 11,12,17 while alloying with the 3d and 4d transition elements, such as Ni, V, Cr, Mn, Co, Mo, and Rh drastically decreases the magnetostriction.…”

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confidence: 99%

Giant magnetostriction in Tb-doped Fe83Ga17 melt-spun ribbons

Liu

Jiang

et al. 2013

Applied Physics Letters

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“…Recently, Barturen et al 12 have reported the presence of zigzags in monocrystalline Fe 1−x Ga x thin films with a canted stripe configuration. Since in these systems variations of the stripe width as function of the applied field are not observed, the origin of the zigzag patterns should be based on a different mechanism than that proposed by Sornette.…”

Section: Introductionmentioning

confidence: 99%

“…In other systems with a reduced out-of-plane anisotropy, a canted phase can appear, i.e., in addition to the stripes with out-of-plane magnetization, an in-plane magnetization component is present [9][10][11][12] . In this canted spin configuration, an in-plane field parallel to the stripes should induce a stripe width variation 13 , however, this effect is difficult to be observed experimentally and hitherto there are few experiments 14,15 showing the effect, aside from certain cases in which an oscillating field is needed in order to unpin the stripes 14 .…”

Section: Introductionmentioning

confidence: 99%

Anisotropy-based mechanism for zigzag striped patterns in magnetic thin films

et al. 2014

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In this work we studied a two dimensional ferromagnetic system using Monte Carlo simulations. Our model includes exchange and dipolar interactions, a cubic anisotropy term, and uniaxial outof-plane and in-plane ones. According to the set of parameters chosen, the model including uniaxial out-of-plane anisotropy has a ground-state which consists of a canted state with stripes of opposite out-of-plane magnetization. When the cubic anisotropy is introduced zigzag patterns appear in the stripes at fields close to the remanence. An analysis of the anisotropy terms of the model shows that this configuration is related to specific values of the ratio between the cubic and the effective uniaxial anisotropy. The mechanism behind this effect is related to particular features of the anisotropy's energy landscape, since a global minima transition as a function of the applied field is required in the anisotropy terms. This new mechanism for zigzags formation could be present in monocrystal ferromagnetic thin films in a given range of thicknesses.

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Crossover to striped magnetic domains in Fe_1−xGa_x magnetostrictive thin films

Cited by 62 publications

References 12 publications

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

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

Giant magnetostriction in Tb-doped Fe83Ga17 melt-spun ribbons

Anisotropy-based mechanism for zigzag striped patterns in magnetic thin films

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