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  1. 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)

  2. 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)

  3. 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)

  4. 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)

  5. No Access

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    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)

  6. 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)

  7. 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)

  8. No Access

    Article

    Analysis of the exchange magnetic structure in Pb3Mn7O15

    The indirect-coupling model is used to analyze the exchange magnetic structure of Pb3Mn7O15 in the hexagonal setting. The ratios of manganese ions Mn4+/Mn3+ in each nonequivalent position are determined. Pb3(Mn0....

    E. V. Eremin, N. V. Volkov, K. A. Sablina… in Journal of Experimental and Theoretical Ph… (2017)

  9. No Access

    Article

    Magnetic properties of Co 2 2+ Co 1 − x 3+ Fe x 3+ BO5 (x = 0.10) single crystals with a ludwigite structure

    The investigation of mixed Co–Fe ludwigite single crystals shows that their magnetic properties are close to the magnetic properties of Fe3BO5 despite the predominance of cobalt ions. The magnetic properties of C...

    Yu. V. Knyazev, N. V. Kazak, O. A. Bayukov… in Journal of Experimental and Theoretical Ph… (2017)

  10. No Access

    Article

    Magnetic and resonance properties of ferrihydrite nanoparticles doped with cobalt

    Powders of undoped ferrihydrite nanoparticles and ferrihydrite nanoparticles doped with cobalt in the ratio of 5: 1 have been prepared by hydrolysis of 3d-metal salts. It has been shown using Mössbauer spectrosco...

    S. V. Stolyar, R. N. Yaroslavtsev, R. S. Iskhakov… in Physics of the Solid State (2017)

  11. No Access

    Article

    Synthesis and structural, magnetic, and resonance properties of the LiCuFe2(VO4)3 compound

    Complex studies have been performed for the structural, static magnetic, and resonance properties of a new magnet LiCuFe2(VO4)3 prepared by solid-phase synthesis. The temperature dependence of the susceptibility ...

    T. V. Drokina, G. A. Petrakovskii, O. A. Bayukov… in Physics of the Solid State (2016)

  12. No Access

    Article

    Change in the magnetic properties of nanoferrihydrite with an increase in the volume of nanoparticles during low-temperature annealing

    The results of the investigation into the effect of low-temperature annealing of a powder of nanoparticles of bacterial ferrihydrite on its magnetic properties have been presented. It has been found that an in...

    D. A. Balaev, A. A. Krasikov, S. V. Stolyar, R. S. Iskhakov… in Physics of the Solid State (2016)

  13. No Access

    Article

    Effect of stoichiometry of Fe and Co on the temperature stability of the magnetic anisotropy in Pr-Dy-Fe-Co-B alloys

    An increase in the cobalt concentration in Pr-Dy-Fe-Co-B alloys leads to the substitution of Co atoms for Fe atoms in the atomic positions, which are the nearest neighbors with the rare-earth metal atoms, and ...

    E. N. Kablov, O. G. Ospennikova, O. A. Bayukov, N. O. Pletnev… in Physics of the Solid State (2015)

  14. No Access

    Article

    Modification of the phase composition and structure of the quasicrystalline Al-Cu-Fe alloy prepared by plasma spraying

    The structural-phase state of quasicrystalline coatings of the Al-Cu-Fe alloy produced under different thermal conditions of plasma spraying (different contact temperatures T k ...

    A. A. Lepeshev, O. A. Bayukov, E. A. Rozhkova, I. V. Karpov… in Physics of the Solid State (2015)

  15. No Access

    Article

    Solid-state synthesis of the ZnO-Fe3O4 nanocomposite: Structural and magnetic properties

    The structural and magnetic properties of ZnO-Fe3O4 nanocomposites produced by the solid-state reaction Zn + 3Fe2O3 → ZnO + 2Fe3O4 upon annealing of Zn/α-Fe2O3 films under vacuum at a temperature of 450°C have be...

    L. E. Bykova, V. G. Myagkov, I. A. Tambasov, O. A. Bayukov… in Physics of the Solid State (2015)

  16. No Access

    Article

    Magnetic properties and the mechanism of formation of the uncompensated magnetic moment of antiferromagnetic ferrihydrite nanoparticles of a bacterial origin

    The magnetic properties of the superparamagnetic ferrihydrite nanoparticles that form as a result of the vital activity of Klebsiella oxytoca bacteria are studied. Both an initial powder with an average number of...

    D. A. Balaev, A. A. Krasikov… in Journal of Experimental and Theoretical Ph… (2014)

  17. No Access

    Article

    Specific features of the crystal structure and magnetic properties of the DyFeTi2O7 compound

    Results of studying the specific features of formation of the crystal structure and distribution of iron cations over the sites in the DyFeTi2O7 compound have been presented and the comparison with the GdGaTi2O7 ...

    T. V. Drokina, G. A. Petrakovskii, M. S. Molokeev… in Physics of the Solid State (2013)

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    Article

    Crystal structure and magnetization of a Co3B2O6 single crystal

    The crystal structure and magnetic properties of Co3B2O6 single crystals are studied. Orthorhombic symmetry with space group Pnnm is detected at room temperature. The measurements of static magnetization and dyna...

    N. V. Kazak, M. S. Platunov, N. B. Ivanova… in Journal of Experimental and Theoretical Ph… (2013)

  19. No Access

    Article

    Evolution of the mössbauer spectra of ludwigite Co3 − x Fe x O2BO3 with substitution of iron for cobalt

    A concentration series of single crystals of iron-cobalt ludwigites Co3 − x Fe x O2BO3 (x = 0.0125, 0.025, 0.050, 0.10, 1.0) has been synthesized. The structure h...

    Yu. V. Knyazev, N. B. Ivanova, O. A. Bayukov, N. V. Kazak… in Physics of the Solid State (2013)

  20. No Access

    Article

    Magnetic state of the GdFeTi2O7 compound

    The X-ray diffraction, Mössbauer, calorimetric, and magnetic characteristics of zirconolite GdFeTi2O7 have been measured to determine the ground magnetic state. A kink dependent on the magnetic prehistory of the ...

    G. A. Petrakovskii, T. V. Drokina, D. A. Velikanov… in Physics of the Solid State (2012)

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