Magnetostatic and magneto-optical properties of Co-based amorphous ribbons

Ганьшина, Е. А.; Перов, Н. С.; Kochneva, M.; Sheverdyaeva, P. M.; Kim, C.G.; Kim, C.O.

doi:10.1016/s0304-8853(01)00665-5

Cited by 10 publications

(5 citation statements)

References 6 publications

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“…The magneto-optical Kerr effect in transversal geometry [6][7][8][9], transversal Kerr effect (TKE), consists of changing the intensity of linearly polarized light reflected by a sample magnetized perpendicular to the plane of the incident light. The value and sign of TKE are defined as the ratio of the difference between the intensities of the light reflected by the sample in the magnetized (I) and demagnetized (I 0 ) states to the light intensity I 0 :…”

Section: Magneto-optical and Magnetic Properties Of (Cofezr) X (Mgf 2...mentioning

confidence: 99%

“…Next, the problem of the influence of the phase composition and atomic structure of metal-dielectric granular composites, which were realized in the process of self-organization during their preparation, on the electrical, magnetic, and magneto-optical properties became a challenging subject of intensive experimental and theoretical studies [5][6][7][8][9][10]. All of these properties of composites depend nonlinearly on the phase composition and atomic structure and, in particular, on the concentration of the magnetic metal phase, the shape and size of metal granules, and their distribution over the bulk of the sample.…”

Section: Introductionmentioning

confidence: 99%

“…All of these properties of composites depend nonlinearly on the phase composition and atomic structure and, in particular, on the concentration of the magnetic metal phase, the shape and size of metal granules, and their distribution over the bulk of the sample. In this regard, electroresistive, magnetic, and magneto-optical (MO) studies, which are sensitive to the characteristic sizes, shapes, and topology of metal particles, are of considerable interest [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Electromagnetic Properties of Thinfilm Nanocomposites (CoFeZr)x(MgF2)100−x

et al. 2023

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The aim of this work is a comprehensive study of the effect of variable atomic composition and structural-phase state of (CoFeZr)x(MgF2)100−x nanocomposites (NCs) on their nonlinear electronic and magnetic/magneto-optical properties. Micrometer-thick nanocomposite layers on the glass substrates were obtained by ion-beam sputtering of a composite target in the argon atmosphere in a wide range of compositions x = 9–51 at·%. The value of the resistive percolation threshold, xper = 34 at·%, determined from the concentration dependencies of the electrical resistance of NCs, coincides with the beginning of nucleation of metallic nanocrystals CoFeZr in MgF2 dielectric matrix. The absolute value of maximum magnetoresistance of NCs is 2.4% in a magnetic field of 5.5 kG at x = 25 at·%, up to the percolation threshold. Two maxima appear in the concentration dependencies of magneto-optical transversal Kerr effect, one of which, at x = 34 at·%, corresponds to the formation of CoFeZr alloy nanocrystals of a hexagonal structure, and the second one at x = 45 at·% corresponds to the phase transition of nanocrystals from a hexagonal to a cubic body-centered structure. The magnetic percolation threshold in (CoFeZr)x(MgF2)100−x system at xfm = 34 at·%, with the appearance of a hysteresis loop and a coercive force of Hc ≈ 8 Oe, coincides with the resistive percolation threshold xper = 34 at·%. Concentration dependence of the coercive force showed that at low contents of metallic alloy x < 30 at·%, NCs are superparamagnetic (Hc = 0). With an increase of the alloy content, in the region of magnetic and resistive percolation thresholds, NCs exhibit a magnetically soft ferromagnetic character and do not change it far beyond the percolation threshold, with the maximum value of the coercive force Hc < 30 Oe.

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Section: Magneto-optical and Magnetic Properties Of (Cofezr) X (Mgf 2...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nonlinear Electromagnetic Properties of Thinfilm Nanocomposites (CoFeZr)x(MgF2)100−x

et al. 2023

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“…10. For both samples annealed at 200 • C, the TKE signal remains almost constant with increasing energy; this indicates that the samples are mainly in an amorphous state [36,37], at least for 15-25 nm below the samples surface (in fact, this is the penetration depth of the light used for making these measurements). This is in agreement with with a thickness of 25 nm already displayed a significant drop of saturation magnetization toward the value of the amorphous alloy, and with Fig.…”

Section: Annealing and Crystallization Processmentioning

confidence: 99%

Thickness dependence of crystalline state in FeZrNbCuB thin films obtained by sputter deposition

Coı̈sson

Celegato

Olivetti

et al. 2011

Journal of Alloys and Compounds

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“…All these properties of nanocomposites appreciably depend on their composition and microstructure, especially on the shape and size of metal granules, on their distribution over the sample volume, and primarily on the concentration of the magnetic metal phase. In this regard, magneto-optical (MO) studies are of a considerable interest, since they are sensitive to the changes in the magnetic and electronic structures caused by the characteristic sizes, shapes, and topology of metal particles [ 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Phase Transformations of a Metal Component on the Magneto-Optical Properties of Thin-Films Nanocomposites (CoFeZr)x (MgF2)100−x

et al. 2021

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The results of complex studies of structural-phase transformations and magneto-optical properties of nanocomposites (CoFeZr)x (MgF2)100-x depending on the metal alloy content in the dielectric matrix are presented. Nanocomposites were deposited by ion-beam sputtering onto glass and glass-ceramic substrate. By studying the spectral and field dependences of the transversal Kerr effect (TKE), it was found that the transition of nanocomposites from superparamagnetic to the ferromagnetic state occurs in the region of xfm~30 at%, that corresponds to the onset the formation of ferromagnetic nanocrystals CoFeZr with hexagonal syngony in amorphous dielectric matrix of MgF2. With an increase of concentrations of the metal alloy for x > xfm, the features associated with structural transitions in magnetic granules are revealed in the TKE spectra. Comparison of the spectral and concentration dependences of TKE for nanocomposites on the glass and glass-ceramics substrates showed that the strongest differences occur in the region of the phase structural transition of CoFeZr nanocrystals from a hexagonal to a body-centered cubic structure at x = 38 at.% on the glass substrates and at x = 46 at.% on glass-ceramics substrates, due to different diffusion rates and different size of metal nanocrystals on amorphous glass substrates and more rough polycrystalline glass-ceramics substrates.

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Magnetostatic and magneto-optical properties of Co-based amorphous ribbons

Cited by 10 publications

References 6 publications

Nonlinear Electromagnetic Properties of Thinfilm Nanocomposites (CoFeZr)x(MgF2)100−x

Nonlinear Electromagnetic Properties of Thinfilm Nanocomposites (CoFeZr)x(MgF2)100−x

Thickness dependence of crystalline state in FeZrNbCuB thin films obtained by sputter deposition

Effect of Phase Transformations of a Metal Component on the Magneto-Optical Properties of Thin-Films Nanocomposites (CoFeZr)x (MgF2)100−x

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