S. A. Vyzulin
Kuban State University
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Featured researches published by S. A. Vyzulin.
Solid State Phenomena | 2012
Ju. Chekrygina; A. Devizenko; Yu. E. Kalinin; E. V. Lebedeva; I. G. Shipkova; A. V. Sitnikov; N. E. Syr’ev; S. A. Vyzulin
Static magnetic properties, ferromagnetic resonance (FMR) and glancing angle X-ray diffraction spectra (GAXRD) of CoFeZr (tm)/Si (tSi) in multilayer nanosystems were investigated for two groups of the samples characterized by tm = 2 3 nm, tSi = 0.5 5 nm and by tm = 7 12 nm, tSi = 5 13 nm. A computer simulation of GAXRD spectra of multilayer interference structures has been performed taking into account the possibility of silicides formation at metal-Si interfaces. Matter of discussion is the layer and interlayer thickness below which a resonance response corresponds to that of an effective medium rather than of an individual magnetic layer.
Bulletin of The Russian Academy of Sciences: Physics | 2010
S. A. Vyzulin; E. V. Lebedeva; D. A. Lysak; N. E. Syr’ev
A method for estimating the form of magnetic nanoparticles in composite film structures based on the observation of ferromagnetic resonance phenomenon is offered. Within the model of the effective medium, an explanation is given for experimentally observed concentration and temperature dependences of resonant fields for composite nanosystem (Co45Fe45Z10)f+(Al2O3)100−f.
Bulletin of The Russian Academy of Sciences: Physics | 2010
S. A. Vyzulin; A. V. Gorobinskii; E. V. Lebedeva; N. E. Syr’ev; M. S. Shlapakov
A series of (CoFeB) + (SiO2) magnetic film samples was investigated by ferromagnetic resonance. The magnetic resonance in low fields was experimentally observed. The influence on the position and width of the low-field peak of the magnetic phase concentration in nanofilms and of the registration parameters of a spectrum were established.
Solid State Phenomena | 2014
Ju. Chekrygina; A. Devizenko; Y. Kalinin; Sergey A. Kirov; E. V. Lebedeva; I. G. Shipkova; A. V. Sitnikov; N. E. Syr’ev; S. A. Vyzulin
Magnetic properties and ferromagnetic resonance data of (Co41Fe39B20)x-(SiO2)100-x composite films and multilayer structures composed of these films separated by SiC interlayers have been studied. It has been shown that one of the possible causes responsible for the differences of magnetic properties of composites and multilayer structures can be different shapes of magnetic particles and granules in these materials.
Solid State Phenomena | 2010
Victoria Buravtsova; E.A. Gan'shina; E. V. Lebedeva; N. E. Syr’ev; I. T. Trofimenko; S. A. Vyzulin; I. G. Shipkova; S. Phonghirun; Y. Kalinin; A. V. Sitnikov
Magnetic and magneto-optical properties of multilayers based on the (Co45Fe45Zr10)Z(Al2O3)100-Z composite and amorphous hydrogenated silicon with various thicknesses both of magnetic and semiconductor layers have been investigated. The nonlinear dependence of magnetic and MO characteristics of the nanostructures on the thickness of layers was found. The interface formed on the boundary of two phases (the ferromagnetic granules and the semiconductor ones) strongly influences the magnetic and MO properties of the structures with thin Si layers.
Bulletin of The Russian Academy of Sciences: Physics | 2016
S. A. Vyzulin; N. E. Syr’ev
The magnetic resonance characteristics of multilayer composite nanosystems with dielectric, semiconductor, and metal nonmagnetic interlayers are investigated. Analysis of the experimental data shows that the dominant factor determining the magnetic resonance characteristics of multilayer composite nanosystems is the shape of their magnetic granules.
Moscow University Physics Bulletin | 2009
S. A. Vyzulin; A. V. Gorobinskii; Yu. E. Kalinin; E. V. Lebedeva; A. V. Sitnikov; N. E. Syr’ev; I. T. Trofimenko; I. G. Shipkova
The combined method of static and dynamic magnetic measurements is used to study nano-dimensional multilayer amorphous CoFeZr/α -Si films. It is established that at the thickness of magnetic layers x = 5–12 nm their magnetization does not differ from that of the bulk material. It is shown that as x is lowered to 2–3 nm, the magnetization of magnetic layers decreases, which may be due to the formation of mixed layers containing nonmagnetic silicides. At a thickness of nonmagnetic interlayers of less than 1 nm the features characteristic of a weak antiferromagnetic interaction of neighboring layers are observed.
Bulletin of The Russian Academy of Sciences: Physics | 2007
S. A. Vyzulin; E. V. Lebedeva; A. V. Maksimochkina; N. S. Perov; N. E. Syr’ev; I. T. Trofimenko
The static magnetic properties and ferromagnetic resonance spectra of multilayer CoFeZr-α-Si films with different numbers and thicknesses of magnetic and nonmagnetic layers have been investigated. It is established that the shape of the ferromagnetic resonance spectrum and the resonant fields Hres depend on the thickness of nonmagnetic layers and their total number. The character of changes in the spectrum makes it possible to estimate the quality of layers and interfaces.
Bulletin of The Russian Academy of Sciences: Physics | 2018
S. A. Vyzulin; A. L. Kevraletin; N. E. Syr’ev; V. Y. Buz’ko; E. S. Michenko; K. N. Rozanov
The magnetoresonance properties of a composite film system based on alsifer nanoparticles in a polymer matrix are studied. It is shown that the system has uniaxial anisotropy of magnetic properties in a sample’s plane. The magnitude and orientation of the field of anisotropy upon varying the alsifer concentration do not change appreciably.
Journal of Experimental and Theoretical Physics | 2017
A. B. Granovskii; Yu. E. Kalinin; M. A. Kashirin; D. V. Kolmakov; V. V. Ryl’kov; A. V. Sitnikov; S. A. Vyzulin; E. A. Gan’shina; A. N. Taldenkov
Thin films of (Co41Fe39B20)x(SiO2)100 – x nanocomposites and hybrid nanocomposite–semiconductor [(Co41Fe39B20)x(SiO2)100 – x/C]50 multilayers are synthesized by ion-beam deposition at various contents x of ferromagnetic metallic Co41Fe39B2O nanogranules in an SiO2 matrix and at various carbon layer thicknesses h < 2 nm. Their magnetic and electrical properties, high-frequency magnetic permeability, magnetooptical spectra, and FMR spectra are studied. It is found that both the single-layer nanocomposites and the multilayers with carbon interlayers are superparamagnetic at x < xper, where xper is the electric conduction percolation threshold: a hysteresis at room temperature is absent, and the blocking temperature determined in quasi-static measurements does not exceed 20–30 K and weakly depends on the carbon layer thickness. At a carbon layer thickness h = 1.2–1.8 nm, the real and imaginary parts of complex magnetic permeability at 50 MHz and room temperature are substantially higher than those of the nanocomposites without carbon layers: their values are typical of ferromagnets. This dependence points to an exchange interaction between nanogranules in layers through a carbon interlayer. The influence of a conducting layer on the static and dynamic magnetic properties of a system of interacting superparamagnetic particles is discussed.