26 Result(s)

Article

Synthesis, Ionic, and Phase Compositions of Ferrogarnet Y_2.5Ce_0.5Fe_2.5Ga_2.5O₁₂

X-ray powder diffraction, X-ray photoelectron, and Mössbauer spectroscopy are used to study the ionic and phase compositions of samples of powdered ferrogarnet Y_2.5Ce_0.5Fe_2.5Ga_2.5O₁₂ obtained by gel combustion fo...

Yu. A. Teterin, M. N. Smirnova, K. I. Maslakov… in Russian Journal of Inorganic Chemistry (2023)

Article

Electric Polarization in the BiMn₇O₁₂ Quadruple Manganite: A ⁵⁷Fe Probe Mössbauer Investigation

The electrical hyperfine interactions of the probe ⁵⁷Fe nuclides localized in the structure of the quadruple manganite BiMn₇O₁₂ are studied by Mössbauer spectroscopy. The measurements are carried out in the tempe...

V. I. Nitsenko, A. V. Sobolev, A. A. Belik… in Journal of Experimental and Theoretical Ph… (2023)

Article

Magnetic Hyperfine Interactions of ⁵⁷Fe Probe Atoms in the CaCu_xMn_{7 – x}O₁₂ (0 ≤ x ≤ 1) Manganites

Magnetic and Mössbauer measurements are performed on the nuclei of ⁵⁷Fe probe atoms in the structure of the substituted CaCu_xMn_{6.96 – x}⁵⁷Fe_0.04O₁₂ (0 ≤ x ≤ 1) manganites in the magnetic-ordering temperature range...

Ya. S. Glazkova, V. S. Rusakov… in Journal of Experimental and Theoretical Ph… (2021)

Article

Many-Electron Effects in Co 3s X-Ray Photoelectron Spectra of Diamagnetic ScCoO₃ and Paramagnetic BiCoO₃ Cobaltites

A new method based on the solution of the Dyson equation in the basis of atomic wavefunctions has been developed to quantitatively describe the influence of the dynamic effect on the structure of X-ray photoel...

V. G. Yarzhemsky, Yu. A. Teterin, I. A. Presnyakov, K. I. Maslakov… in JETP Letters (2020)

Article

Synthesis and Study of (Sr,La)₂FeCo_0.5Mo_0.5O_{6 −} δ Oxides with Double Perovskite Structure

Complex oxides Sr_{2 − x}La_xFeCo_0.5Mo_0.5O_{6 − δ}, (x = 0.2, 0.4; δ ≈ 0.03–0.15) have been first synthesized by the sol-gel method. Their crystal structures have been refined by the Rietveld method; the refinement show...

M. M. Abdullaev, S. Ya. Istomin, A. V. Sobolev… in Russian Journal of Inorganic Chemistry (2019)

Article

Electronic Structure of Cobaltites ScCo_{1 –x}Fe_xO₃ (x = 0, 0.05) and BiCoO₃: X-Ray Photoelectron Spectroscopy

The electronic structure of the Co³⁺ cations in perovskite cobaltites Sc_{1 –y}Co_{1 –x}Fe_xO_{3 – (3/2)y} (x = 0, 0.05; y = 0.1) and BiCoO₃ has been studied by X-ray photoelectron spectroscopy. Our measurements have been ...

Yu. A. Teterin, A. V. Sobolev, A. A. Belik… in Journal of Experimental and Theoretical Ph… (2019)

Article

Mössbauer study of the modulated magnetic structure of FeVO₄

Mössbauer spectroscopy is used to study the FeVO₄ multiferroic, which undergoes two magnetic phase transitions at T _N1 ≈ 22 K and T ...

A. V. Sobolev, I. A. Presnyakov… in Journal of Experimental and Theoretical Ph… (2017)

Article

X-ray photoelectron spectroscopy of FeP phosphide

The structure of the outer and inner electron spectra of iron (2p, 3p, 3s, and 3d) and phosphorus (3s and 3p) atoms in FeP monophosphide is studied in detail by the X-ray photoelectron spectroscopy (XPS) method. ...

Yu. A. Teterin, A. V. Sobolev… in Journal of Experimental and Theoretical Ph… (2017)

Article

Synthesis and physicochemical properties of N-decylpyridinium salts with inorganic anions

Ionic liquids with N-decylpyridinium cation and inorganic anions SO ₄ ^2– , NO ₃ ^– , SCN^–, NO ...

O. E. Zhuravlev, I. A. Presnyakov… in Russian Journal of General Chemistry (2016)

Article

Oxidation state and local environment of iron and hydrolytic stability of multicomponent aluminum-iron-phosphate glasses for immobilization of high-level waste

The nuclear gamma resonance (Mössbauer effect) is used to determine the oxidation state and the coordination environment of iron ions in model glasses that simulate vitrified high-level waste. A major fraction...

Ya. S. Glazkova, S. N. Kalmykov, I. A. Presnyakov… in Inorganic Materials: Applied Research (2016)

Article

The synthesis of Fe₃O₄ spherical particles with defined size in a liquid medium

A method for the preparation of nanoand submicron spherical particles of magnetite which form agglomerates was described. At varying the reaction conditions, the particles of -50—200 nm were obtained and chara...

A. E. Dosovitskii, E. V. Grishechkina, A. L. Mikhlin… in Russian Chemical Bulletin (2016)

Article

The structural state of iron in multicomponent aluminum iron borosilicate glass depending on their composition and synthesis conditions

The oxidation states and coordination environment of iron ions in borosilicate glass used for the immobilization of iron-containing radioactive waste are studied by the methods of Mössbauer and Fourier transfo...

Ya. S. Glazkova, S. N. Kalmykov, I. A. Presnyakov… in Glass Physics and Chemistry (2015)

Article

Synthesis of zinc sulfide nanoparticles in an ionic liquid, N-decylpyridinium tetrafluoroborate

Method for obtaining zinc sulfide nanoparticles, “quantum dots,” in an ionic liquid, N-decylpyridinium tetrafluoroborate, is suggested. The average size and shape of the nanoparticles were determined by UV spectr...

O. E. Zhuravlev, I. A. Presnyakov… in Russian Journal of Applied Chemistry (2015)

Article

Oxidation state and local environment of iron in multicomponent aluminoborosilicate glasses

Ya. S. Glazkova, S. N. Kalmykov, A. V. Sobolev… in Doklady Physical Chemistry (2015)

Article

Spatially modulated magnetic structure of AgFeO₂: Mössbauer study on ⁵⁷Fe nuclei

The results of the Mössbauer study of ferrite AgFeO₂ manifesting multiferroic properties (at T ≤ T _N2) have been presented. The hyperfine interaction parameters of ⁵⁷Fe nuclei have been analyzed i...

V. S. Rusakov, I. A. Presnyakov, A. V. Sobolev, A. M. Gapochka… in JETP Letters (2014)

Article

Hyperfine magnetic fields at the nuclei of probe ¹¹⁹Sn atoms and exchange interactions in the CaCu₃Mn_3.96Sn_0.04O₁₂ manganite

We have investigated the hyperfine magnetic interactions between the nuclei of probe ¹¹⁹Sn atoms in the CaCu₃Mn_3.96Sn_0.04O₁₂ double manganite by Mössbauer spectroscopy using magnetic measurements. A consistent de...

V. S. Rusakov, I. A. Presnyakov… in Journal of Experimental and Theoretical Ph… (2011)

Article

The composition of iron-containing microphases in the structure of multiwalled carbon nanotubes

The phase composition of carbon nanotubes (CNTs) with encapsulated iron atoms was studied by ⁵⁷Fe Mössbauer spectroscopy. The synthesis of CNTs was shown to stabilize iron atoms as both thermodynamically stable i...

A. V. Sobolev, N. B. Cherkasov, I. A. Presnyakov… in Russian Journal of Physical Chemistry A (2010)

Article

Electronic state of the ⁵⁷Fe probe atoms in perovskites LaMO₃ (M = Ni, Cu)

Mössbauer spectroscopy has been applied for comparative study of the electronic state of probe iron atoms in perovskite-like nikelate LaNi_0.99 ⁵⁷Fe_0.01O₃ and cuprate LaCu_0.99 ...

I. A. Presnyakov, V. S. Rusakov, A. V. Sobolev… in Russian Journal of Inorganic Chemistry (2009)

Article

Diamagnetic probe atoms of Tin-119 in magnetically ordered ferrites with a brownmillerite-type structure

The method of Mossbauer probe spectroscopy on ¹¹⁹Sn nuclei was used applied to study the influence of the nature of the alkali-earth cation A²⁺ = (Ca, Sr) in A₂Fe₂O₅ ferrites with an ordered brownmillerite-type s...

I. A. Presnyakov, K. V. Pokholok, A. V. Sobolev in Moscow University Chemistry Bulletin (2009)