Scanning MOKE investigation of ion-beam-synthesized silicide films

Гумаров, Г. Г.; Коновалов, Д. А.; Алексеев, А. В.; Petukhov, V. Yu.; Жихарев, В. А.; Нуждин, В. И.; Shustov, V. A.

doi:10.1016/j.nimb.2011.08.056

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…Thus, a magneti cally anisotropic sample is characterized by a much lower degree of crystal order, which usually reduces the coercivity in thin granular films. This conclusion is consistent with previous assumption regarding the applicability of the Herzer model to the formation of the anisotropy of magnetic nanoparticles [13,14]. Figure 2 shows the magnetization curves for the easy and hard magnetization axes obtained by sample scanning according to the magnetooptical Kerr effect (MOKE).…”

Section: Resultssupporting

confidence: 90%

Uniaxial magnetic anisotropy of iron-silicide thin films ion synthesized in an external magnetic field

Алексеев

Гумаров

Коновалов

et al. 2014

J. Synch. Investig.

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Fe 3 Si ferromagnetic thin films are synthesized by iron ion implantation into single crystal Si (111) and Si(100) wafers. The ion dose dependence of the magnetic properties of the iron silicide thin films is investigated in detail by the magnetooptical Kerr effect. Magnetically isotropic and anisotropic films are formed, depending on the ion beam synthesis conditions. The film coercivity increases with implantation dose. According to the results of X ray analysis, the magnetically isotropic samples with an average crystallite size of 20-30 nm exhibit higher crystlallinity as compared with the magnetically anisotropic films. The results obtained show that the magnetic properties of both the isotropic and anisotropic samples can be described within the random anisotropy model. It is established with increasing ion implantation dose that the magne tocrystalline anisotropy of randomly oriented crystallites compete with the induced uniaxial anisotropy, up to suppression of the latter.

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Section: Resultssupporting

confidence: 90%

Uniaxial magnetic anisotropy of iron-silicide thin films ion synthesized in an external magnetic field

Алексеев

Гумаров

Коновалов

et al. 2014

J. Synch. Investig.

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“…Samples implanted with high Fe + ion fluence (in a range from 1.6 × 10 17 to 2.4 × 10 17 cm -2 ) in the external magnetic field had the uniaxial anisotropy. The coercive force determined in the direction of the easy magnetization and the anisotropy field determined as the saturation field along the hard magnetization axis increased with the increase in the implantation fluence for films with the magnetic anisotropy [7]. The rectangular hysteresis loop and the hysteresisless magnetization curve were observed for easy and hard magnetization axes respectively (Fig.…”

Section: Resultsmentioning

confidence: 91%

Ferromagnetic resonance investigation of magnetic anisotropy of ion-synthesized iron-silicide thin films

Алексеев

Гумаров

Bakirov

et al. 2016

J. Synch. Investig.

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40 keV iron ions have been implanted into single-crystal silicon wafers at room temperature. As a result, thin iron-silicide films were synthesized in the near-surface region of substrates. Scanning magnetooptical Kerr effect studies showed that some films had the uniaxial magnetic anisotropy. The coercive force determined in the direction of the easy magnetization for films with the magnetic anisotropy increased with the increase in the implantation fluence. However, ferromagnetic samples became isotropic when the dose of the order of 2.6×10 17 cm -2 was reached. Ferromagnetic resonance studies showed that the resonance linewidth in isotropic samples increased with the temperature decrease. It was found that the ferromagnetic resonance linewidth for samples with the uniaxial anisotropy was less than that for isotropic ones. The observed behavior of resonance spectra can be explained on the basis of the model taking into account the effect of thermal fluctuations of the resonance line shape in disperse ferromagnets.

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“…20 The cluster elongation results in the uniaxial magnetic anisotropy. 20,21 The process can result in further clustering of the implanted species. 21 Both sets of samples were subsequently annealed at 500 °C in vacuum (2 × 10 −6 Torr) for 60 min.…”

Section: Methodsmentioning

confidence: 99%

“…Mainly, three stable silicides (FeSi 2 , FeSi, and Fe 3 Si) are possible in this process. [19][20][21] Since the properties of iron silicide are strongly dependent on the phase, chemical state analysis of iron silicide is important. X-ray photoelectron spectroscopy (XPS) can be used to analyze the chemical state.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Formation and characterization of embedded Fe3Si binary structures in Si

Lakshantha

McDaniel

Rout

2019

Journal of Applied Physics

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Chemical and electronic properties of ion beam synthesized Fe-Si binary structures are studied using X-ray photoelectron spectroscopy binding energy analysis. Ferromagnetic Fe-Si (Fe 3 Si) binary structure formation is enhanced in the ion-beam synthesis process by applying an in situ external magnetic field parallel to the Si substrate during the Fe implantation. Core-level analysis shows features corresponding to chemical environments of different Fe-Si phases. Fe 2p 3/2 and Fe 3s peaks were analyzed, considering peak position, symmetry, and splitting. The ferromagnetic Fe 3 Si phase shows a highly asymmetric 2p 3/2 peak at 706.6 eV and peak splitting in the 3s peak due to the exchange interaction with unfilled 3d electrons in the valance band. In contrast, the Si core-level did not show any significant features leading to the identification of Fe-Si binary compounds. The Si 2p peak showed a constant 0.2 eV peak shift toward the high-energy side compared to the elemental Si. Further valance band spectra reveal distinct features to help identify the Fe 3 Si phase. In general, core and valance band features of Fe-Si binary compounds provided definitive information about Fe 3 Si phase identification and its electronic structure with direct evidence of the exchange interaction, which occurs between core levels, valance band, and the unfilled 3d shell.

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Scanning MOKE investigation of ion-beam-synthesized silicide films

Cited by 9 publications

References 10 publications

Uniaxial magnetic anisotropy of iron-silicide thin films ion synthesized in an external magnetic field

Uniaxial magnetic anisotropy of iron-silicide thin films ion synthesized in an external magnetic field

Ferromagnetic resonance investigation of magnetic anisotropy of ion-synthesized iron-silicide thin films

Formation and characterization of embedded Fe3Si binary structures in Si

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