Skip to main content

89 Result(s)

within O. A. Bayukov Remove this filter

previous disabled Page of 5
and

  1. No Access

    Article

    Superparamagnetic Relaxation in Ensembles of Ultrasmall Ferrihydrite Nanoparticles

    The paper examines the impact of interparticle interactions on the superparamagnetic relaxation of ultrasmall nanoparticle ensembles, using Fe2O3∙nH2O iron oxyhydroxide (ferrihydrite) nanoparticles as an example....

    Yu. V. Knyazev, D. A. Balaev, S. A. Skorobogatov… in Physics of Metals and Metallography (2024)

  2. No Access

    Article

    Preparation and Properties of Magnetic Composites γ-Fe2O3/SiO2/Aptamer(FAS9) for Magnetic Resonance Hyperthermia

    Powders of maghemite γ-Fe2O3 with an average diameter of 8 nm, γ-Fe2O3/SiO2 composites with an agglomerate diameter of about 50 nm and a size of interspersed γ-Fe2O3 particles of 6 nm, and γ‑Fe2O3/SiO2/aptamer(FA...

    S. V. Stolyar, O. A. Li, E. D. Nikolaeva… in Physics of Metals and Metallography (2023)

  3. No Access

    Article

    An Effective Method of Magnetic Hyperthermia Based on the Ferromagnetic Resonance Phenomenon

    Nickel and cobalt ferrite nanoparticles have been synthesized using the chemical precipitation method; the nanoparticle sizes were found to be 63 ± 22 and 26 ± 4 nm, respectively. The static hysteresis loops a...

    S. V. Stolyar, O. A. Li, E. D. Nikolaeva… in Physics of Metals and Metallography (2023)

  4. No Access

    Article

    Maghemite Nanoparticles for DNA Extraction: Performance and Blocking Temperature

    Iron oxide nanoparticles coated with polyethylene glycol were synthesized by coprecipitation for use in the magnetic separation of DNA (deoxyribonucleic acid). The blocking temperature of nanoparticles was stu...

    S. V. Stolyar, S. V. Komogortsev… in Journal of Superconductivity and Novel Mag… (2022)

  5. No Access

    Article

    Iron Oxide Nanoparticles for Isolating DNA from Blood Cells

    Magnetic iron oxide nanoparticles for separating DNA from blood cells are synthesized. Magnetic nanoparticles with a silicate coating are obtained, and their physical and chemical properties are studied. The p...

    A. V. Tyumentseva, A. S. Gorbenko… in Bulletin of the Russian Academy of Science… (2021)

  6. No Access

    Article

    Synthesis and Structural and Magnetic Properties of the NaNiFe2(VO4)3 Compound

    A new magnetic compound NaNiFe2(VO4)3 has been obtained by the solid-phase synthesis and studied by X-ray diffractometry, nuclear gamma resonance, and magnetometry. The crystal structure of multicomponent vanadat...

    T. V. Drokina, D. A. Velikanov, O. A. Bayukov, M. S. Molokeev… in Physics of the Solid State (2021)

  7. No Access

    Article

    Effect of Electron Delocalization on the “Recoil-Free” Absorption of γ-Ray Photons in Fe1.75V0.25BO4 Warwickite

    Mössbauer spectroscopy is used to study the characteristic features of the crystal lattice dynamics in powdered single crystals of Fe1.75V0.25BO4 warwickite in the temperature range of 4.2–505 K. The Debye temper...

    Yu. V. Knyazev, O. A. Bayukov, M. S. Shustin, D. V. Balatskii… in JETP Letters (2021)

  8. No Access

    Article

    Magnetic States of Fe2+ Ions in FexMn1 – xS Induced by Chemical Pressure

    Influence of the chemical pressure (x) in single crystals of FexMn1 – xS (0.12 ≤ x ≤ 0.29) on the spin state of iron ions was studied by Mössbauer spectroscopy in the temperature range from 4.2 to 300 K. Peculiar...

    G. M. Abramova, Yu. V. Knyazev, O. A. Bayukov, S. P. Kubrin in Physics of the Solid State (2021)

  9. No Access

    Article

    HoFeTi2O7: Synthesis, Peculiarities of the Crystal Structure, and Magnetic Properties

    Polycrystalline samples of HoFeTi2O7 were obtained by solid-phase synthesis and investigated using X-ray diffraction, gamma resonance, and SQUID measurements. Characteristics of the structural properties are pres...

    T. V. Drokina, M. S. Molokeev, D. A. Velikanov… in Physics of the Solid State (2020)

  10. No Access

    Article

    Physical Properties of a Frustrated Quasi-One-Dimensional NaCuFe2(VO4)3 Magnet and Effect of Chemical Pressure Induced by the Substitution of Sodium for Lithium

    The structural, thermal, static magnetic, and resonance properties of the low-dimensional NaCuFe2(VO4)3 compound obtained by the solid-phase synthesis have been investigated. In the temperature range of 110–300 K...

    T. V. Drokina, G. A. Petrakovskii, O. A. Bayukov… in Physics of the Solid State (2020)

  11. No Access

    Article

    Magnetite Nanocrystals with a High Magnetic Anisotropy Constant due to the Particle Shape

    Chemical solution deposition in the presence of arabinogalactan makes it possible to prepare magnetite nanocrystals in the form of square plates with a high aspect ratio (~1/9). The magnetic anisotropy constan...

    S. V. Stolyar, S. V. Komogortsev, L. A. Chekanova… in Technical Physics Letters (2019)

  12. No Access

    Article

    Magnetic Properties of Ultrafine ε-Fe2O3 Nanoparticles in a Silicon Xerogel Matrix

    A new metamaterial is obtained on the basis of ε-Fe2O3 nanoparticles immobilized in a xerogel matrix. Samples are synthesized by impregnating SiO2 hydrogel with iron (II) salts with subsequent drying and calcinat...

    Yu. V. Knyazev, S. S. Yakushkin… in Bulletin of the Russian Academy of Science… (2019)

  13. No Access

    Article

    Cation Distribution in the Composite Materials of the CaFe2O4-α-Fe2O3 Series

    Structured composite materials CaFe2O4-α-Fe2O3 (α-Fe2O3 content is 2–82 wt.%) are obtained with the method of solid-phase synthesis at 1000 °C. The phase composition of the samples is studied using powder X-ray d...

    Yu. V. Knyazev, N. N. Shishkina, O. A. Bayukov… in Journal of Structural Chemistry (2019)

  14. No Access

    Article

    Anisometric Iron Oxide-Based Nanoparticles and Sols Based on Them: Preparation and Properties

    We have synthesized magnetic powders of the magnetite-maghemite series by the chemical reaction of the FeSO4 iron salt and the natural arabinogalactan polysaccharide. These particles with a high magnetization val...

    S. V. Stolyar, O. A. Bayukov… in Journal of Superconductivity and Novel Mag… (2019)

  15. No Access

    Article

    Experimental Modeling of C0-Forming Processes Involving Cohenite and CO2-Fluid in a Silicate Mantle

    Experimental studies were performed in the Fe3C–SiO2–(Mg,Ca)CO3 system (6.3 GPа, 1100–1500°C, 20–40 h). It is established that the carbide–oxide–carbonate interaction leads to the formation of ferrosilite, fayali...

    Yu. V. Bataleva, Yu. N. Palyanov, Yu. M. Borzdov, O. A. Bayukov… in Doklady Earth Sciences (2018)

  16. No Access

    Article

    Conditions of Formation of Iron–Carbon Melt Inclusions in Garnet and Orthopyroxene under P-T Conditions of Lithospheric Mantle

    Of great importance in the problem of redox evolution of mantle rocks is the reconstruction of scenarios of alteration of Fe0- or Fe3C-bearing rocks by oxidizing mantle metasomatic agents and the evaluation of st...

    Yu. V. Bataleva, Yu. N. Palyanov, Yu. M. Borzdov, I. D. Novoselov… in Petrology (2018)

  17. No Access

    Article

    Mössbauer Spectroscopy Study of the Superparamagnetism of Ultrasmall ϵ-Fe2O3 Nanoparticles

    The superparamagnetism of an ensemble of ϵ-Fe2O3 nanoparticles with a mean size of 3.9 nm dispersed in a xerogel SiO2 matrix is studied by the Mössbauer spectroscopy method. It is shown that most nanoparticles at...

    Yu. V. Knyazev, D. A. Balaev, V. L. Kirillov, O. A. Bayukov… in JETP Letters (2018)

  18. No Access

    Article

    Bacterial Ferrihydrite Nanoparticles: Preparation, Magnetic Properties, and Application in Medicine

    Nanoparticles of antiferromagnetically ordered materials acquire the uncompensated magnetic moment caused by defects and surface effects. A bright example of such a nano-antiferromagnet is nanoferrihydrite con...

    S. V. Stolyar, D. A. Balaev, V. P. Ladygina… in Journal of Superconductivity and Novel Mag… (2018)

  19. No Access

    Article

    Modification of the Structure and Magnetic Properties of Cobalt-Doped Ferrihydrite Nanoparticles Under Heat Treatment

    Nanoparticles of antiferromagnetic materials acquire the magnetic moment due to the surface effects and structural defects. According to the Neel hypothesis, magnetic moment μ P of a particle cont...

    S. V. Stolyar, D. A. Balaev, A. A. Krasikov… in Journal of Superconductivity and Novel Mag… (2018)

  20. No Access

    Article

    Evolution of the Fe3+ Ion Local Environment During the Phase Transition ε-Fe2O3 → α-Fe2O3

    Evolution of the local environment of Fe3+ ions in deposited Fe2O3/SiO2 nanoparticles formed in samples with different iron contents was investigated in order to establish the conditions for obtaining the stable

    S. S. Yakushkin, D. A. Balaev… in Journal of Superconductivity and Novel Mag… (2018)

previous disabled Page of 5