Structural, magnetic, and electronic properties of high moment FeCo nanoparticles

Zehani, K.; Bez, R.; Boutahar, A.; Hlil, E.K.; Lassri, H.; Moscovici, J.; Mliki, N.; Bessaïs, L.

doi:10.1016/j.jallcom.2013.11.208

Cited by 52 publications

(22 citation statements)

References 21 publications

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“…Various preparation methods, such as mechanical alloying [16], polyol [17,18,19] and solgel [20,21] process, transmetallation [22], coprecipitation [23], as well as co-reduction [24] with ultrasound assistance [25] have been reported to result in Fe-Co alloy nanoparticles with various Co concentration levels. Due to their large reactive specific surface area, fine metal powders can be susceptible to spontaneous ignition under exposure to air, and consequently they require special precautions regarding their storage and manipulations [26].…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetism of Fe–Co alloy nanoparticles

Klencsár

Németh

Zoltán

et al. 2016

Journal of Alloys and Compounds

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We report the hydrothermal synthesis and structure of Fe x Co 1-x alloy nanoparticles with considerable stability against oxidation under ambient atmosphere. Powder X-ray diffractometry (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma mass spectrometry (ICP-MS), 57 FeMössbauer spectroscopy and magnetization measurements are applied to characterize the composition, morphology, crystal structure, atomic order and magnetic properties of the nanoparticles. As-prepared samples are composed mainly of the bcc Fe x Co 1-x alloy phase.TEM images of heat-treated samples confirm the nanoparticle nature of the original alloys. A consistent analysis of the experimental results leads to x  53% and x  62% Fe atomic ratio respectively in two analogous alloy samples, and suggests that the atomic level structure of the nanoparticles corresponds to that of a fully disordered (A2-type) alloy phase. Exploration of the effect of cobalt on the 57 Fe hyperfine parameters of iron microenvironments suggests that in these alloys the electronic state of Fe atoms is perturbed equally and in an additive manner by atoms in their first two coordination spheres.

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Section: Introductionmentioning

confidence: 99%

Structure and magnetism of Fe–Co alloy nanoparticles

Klencsár

Németh

Zoltán

et al. 2016

Journal of Alloys and Compounds

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“…The FeCo-based soft magnetic alloys belong to a class of nanomaterials which has some unique features, such as large permeability, high saturation magnetization, and high Curie temperature [2][3][4]. The FeCo alloys are being widely studied due to the great technological importance and their multiple applications, such as the medicine related to cancer treatments [5], the biomedicine to the controlled release of drugs in the body [6], in the catalytic process [7][8][9], in magnetic bearings [10], and thin films [11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of air stable FeCo alloy nanocrystallite by proteic sol–gel method using a rotary oven

Braga

Dias

Sousa

et al. 2015

Journal of Alloys and Compounds

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“…FeCo alloys have greater attraction due to its rich physical and chemical properties. Such as ferroelectricity at room temperature, high Curie temperature, high magnetic moments, and mechanical hardness, etc For these properties, FeCo alloy can be promoted for various technological applications for instance, transformer core, electric motor, pole-pieces, high density magnetic recording, biomedicine, drug delivery, magnetic resonance imaging, magnetic hyperthermia and specially data storage and so on [4][5][6][7][8][9][10][11]. Elasticity is the embryonic property of solid materials that is essential in numerous areas spanning of materials selection in mechanical design.…”

Section: Introductionmentioning

confidence: 99%

“…Many experimental research have been performed on structural and magnetic properties of FeCo alloys [10,12,13]. However, based on composition, only a very few computational studies have focused on electronic, magnetic, and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

A systematic computational study of electronic, mechanical, and optical properties of Fe_1−xCo_x alloy

2020

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This report demonstrates the systematic study of electronic, mechanical, and optical properties of Fe 1−x Co x alloy (x=0.00, 0.05, 0.10, 0.15, 0.20, and 0.25) using plane wave ultrasoft pseudopotential based on spin-polarized density functional theory. The upshots expose overlapped of valence and conductance states and confirms electronic bands polarization. The energy bands are significantly shifted with increasing Co atoms. The dispersion energies reveal anisotropic behavior of electronic energy levels. The density of states manifests strong electronic interaction between Co and Fe atoms. The spin polarization is mainly attributed from the exchange interactions among electronic spins, which confirms the strong electron-electron interactions. Subsequently, spin polarization induces spin magnetic moments. Minority spin states are dominant for Fe 1−x Co x alloy, which significantly changed the electronic properties. Moreover, Elastic constants confirm that all the phases of Fe 1−x Co x alloy are mechanically stable, and the higher elastic modulus manifests better performance of the resistance to shape change and against uniaxial tensions. The optical properties of FeCo alloy exhibit strong interrelation with atomic composition of Fe and Co. The loss spectra reveal high plasmonic resonance that can be chemically tuned through atomic composition. The spin magnetic moments and high plasmonic resonance make the Fe 1−x Co x alloys as the prominent mechanically stable materials for magneto-optical applications.

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Structural, magnetic, and electronic properties of high moment FeCo nanoparticles

Cited by 52 publications

References 21 publications

Structure and magnetism of Fe–Co alloy nanoparticles

Structure and magnetism of Fe–Co alloy nanoparticles

Synthesis of air stable FeCo alloy nanocrystallite by proteic sol–gel method using a rotary oven

A systematic computational study of electronic, mechanical, and optical properties of Fe_1−xCo_x alloy

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Structural, magnetic, and electronic properties of high moment FeCo nanoparticles

Cited by 52 publications

References 21 publications

Structure and magnetism of Fe–Co alloy nanoparticles

Structure and magnetism of Fe–Co alloy nanoparticles

Synthesis of air stable FeCo alloy nanocrystallite by proteic sol–gel method using a rotary oven

A systematic computational study of electronic, mechanical, and optical properties of Fe1−xCox alloy

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A systematic computational study of electronic, mechanical, and optical properties of Fe_1−xCo_x alloy