Search Results - "Knyazev, Yu.V"

Role of the surface effects and interparticle magnetic interactions in the temperature evolution of magnetic resonance spectra of ferrihydrite nanoparticle ensembles by Balaev, D.A., Stolyar, S.V., Knyazev, Yu.V., Yaroslavtsev, R.N., Pankrats, A.I., Vorotynov, A.M., Krasikov, A.A., Velikanov, D.A., Bayukov, O.A., Ladygina, V.P., Iskhakov, R.S.

“…•We prepared antiferromagnetic ferrihydrite nanoparticles using two methods: (i) chemical precipitation and (ii) from bacterial sediments after cultivating…”
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Electronic structure and optical properties of Nd5Ge3 compound by Knyazev, Yu.V., Lukoyanov, A.V., Kuz‘min, Yu.I., Maji, B., Suresh, K.G.

“…•We report experimental measurements of optical properties of Nd5Ge3.•The electronic structure and conductivity calculated within the LSDA+U method.•Features…”
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Spectral characteristics and electronic structure of semimetallic ScSb and YSb by Knyazev, Yu.V., Lukoyanov, A.V., Kuz'min, Yu.I.

“…A detailed study of the optical properties of semi-metallic compounds ScSb and YSb has been performed by means of ellipsometric method and first-principle…”
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Magnetically dead layer in interacting ultrafine NiFe2O4 nanoparticles by Knyazev, Yu.V., Balaev, D.A., Stolyar, S.V., Shokhrina, A.O., Velikanov, D.A., Pankrats, A.I., Vorotynov, A.M., Krasikov, A.A., Skorobogatov, S.A., Volochaev, M.N., Bayukov, O.A., Iskhakov, R.S.

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Investigation of semimetallic properties of GdSb and TbSb compounds: A first-principle and optical study by Knyazev, Yu.V., Kuz'min, Yu.I., Baidak, S.T., Lukoyanov, A.V.

“…The electronic and optical properties of binary semimetals GdSb and TbSb in the rocksalt cubic structure have been investigated. The spin-polarized band…”
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Electronic structure of RSn 1.1 Ge 0.9 (R = Dy, Ho) ternary compounds: Band calculation and optical properties by Knyazev, Yu.V., Lukoyanov, A.V., Kuz’min, Yu.I., Gupta, S., Suresh, K.G.

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Magnetic anisotropy and core-shell structure origin of the biogenic ferrihydrite nanoparticles by Knyazev, Yu.V., Balaev, D.A., Stolyar, S.V., Bayukov, O.A., Yaroslavtsev, R.N., Ladygina, V.P., Velikanov, D.A., Iskhakov, R.S.

“…Ferrihydrite is a low-crystalline nanoscale matter. The uncompensated magnetic moment of the ferrihydrite caused by the antiferromagnetic ordering of the…”
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Interparticle magnetic interactions in synthetic ferrihydrite: Mössbauer spectroscopy and magnetometry study of the dynamic and static manifestations by Knyazev, Yu.V., Balaev, D.A., Stolyar, S.V., Krasikov, A.A., Bayukov, O.A., Volochaev, M.N., Yaroslavtsev, R.N., Ladygina, V.P., Velikanov, D.A., Iskhakov, R.S.

“…•Synthetic and biogenic ferrihydrite nanoparticles are synthesized.•Analysis of the Mössbauer spectra and magnetometry revealed the interparticle magnetic…”
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Giant anisotropy of magnetic properties of hydrated iron fluoridotitanate single crystal by Dubrovskiy, A.A., Knyazev, Yu.V., Velikanov, D.A., Vorotynov, A.M., Laptash, N.M., Gerasimova, Yu.V.

“…•We have synthesized high-quality single crystals of the FeTiF6 ‧ 6 H2O.•Magnetic properties investigation of the FeTiF6 ‧ 6 H2O single crystal has shown that…”
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Effect of magnetic frustrations on magnetism of the Fe3BO5 and Co3BO5 ludwigites by Knyazev, Yu.V., Kazak, N.V., Nazarenko, I.I., Sofronova, S.N., Rostovtsev, N.D., Bartolome, J., Arauzo, A., Ovchinnikov, S.G.

“…•The magnetic structures of Fe3BO5 and Co3BO5 ludwigites have been studied experimentally and theoretically.•The different collinear spin configurations in the…”
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Field induced metamagnetism and large magnetic entropy change in RRhSi (R = Tb, Dy, Ho) rare earth intermetallics by Gupta, S., Lukoyanov, A.V., Knyazev, Yu.V., Kuz'min, Yu.I., Suresh, K.G.

“…•Large magnetocaloric effect in DyRhSi and HoRhSi intermetallics is uncovered.•The observed value is higher than reported in other compounds of RTX family.•It…”
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Superparamagnetic blocking and magnetic interactions in nanoferrihydrite adsorbed on biomineralized nanorod-shaped Fe3S4 crystallites by Knyazev, Yu.V., Ikkert, O.P., Semenov, S.V., Volochaev, M.N., Molokeev, M.S., Platunov, M.S., Khramov, E.V., Dubrovskiy, A.A., Shestakov, N.P., Smorodina, E.D., Karnachuk, O.V., Balaev, D.A.

“…A composite based on nanorod-shaped greigite (Fe3S4) crystallites with adsorbed ferrihydrite (Fe2O3 ‧ nH2O) nanoparticles has been synthesized. The synthesis…”
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Electronic and Spectral Properties of RRhSn by Knyazev, Yu.V, Lukoyanov, A.V, Kuz'min, Yu.I, Gupta, S, Suresh, K.G

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ε-Fe2O3 nanoparticles embedded in silica xerogel – Magnetic metamaterial by Yakushkin, S.S., Balaev, D.A., Dubrovskiy, A.A., Semenov, S.V., Knyazev, Yu.V., Bayukov, O.A., Kirillov, V.L., Ivantsov, R.D., Edelman, I.S., Martyanov, O.N.

“…A novel method for synthesizing a new metamaterial based on ε-Fe2O3 nanoparticles immobilized in the xerogel matrix was proposed. Samples with different…”
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Structural and electron transport properties of CaFe2O4 synthesized in air and in helium atmosphere by Knyazev, Yu.V., Tarasov, A.S., Platunov, M.S., Trigub, A.L., Bayukov, O.A., Boronin, A.I., Solovyov, L.A., Rabchevskii, E.V., Shishkina, N.N., Anshits, A.G.

“…The samples with the CaFe2O4-type crystal structure were obtained by the solid-state reaction method at 1000 °C in the air and the helium atmosphere for the…”
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Cobalt-related features of spectral and magnetic properties of RNi4Co (R=Ho, Er) by Lukoyanov, A.V., Knyazev, Yu.V., Kuz‘min, Yu.I., Kuchin, A.G.

“…In this paper we investigate spectral and magnetic properties of RNi4Co (R=Ho, Er) intermetallics to reveal the features associated with the presence of Co…”
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Ferrihydrite nanoparticles produced by Klebsiella oxytoca: Structure and properties dependence on the cultivation time by Stolyar, S.V., Bayukov, O.A., Balaev, D.A., Ladygina, V.P., Yaroslavtsev, R.N., Knyazev, Yu.V., Balasoiu, M., Kolenchukova, O.A., Iskhakov, R.S.

“…[Display omitted] •Ferrihydrite nanoparticles were synthesized using Klebsiella oxytoca microorganisms.•Ferrihydrite pass through several structural states…”
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Dimethylsulfoxide as a media for one-stage synthesis of the Fe3O4-Based ferrofluids with a controllable size distribution by Kirillov, V.L., Yakushkin, S.S., Balaev, D.A., Dubrovskiy, A.A., Semenov, S.V., Knyazev, Yu.V., Bayukov, O.A., Velikanov, D.A., Yatsenko, D.A., Martyanov, O.N.

“…The ultrafine (d = 4 nm) magnetite ferrofluid with a narrow nanoparticle size distribution has been synthesized in one stage at room temperature from a…”
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Fe-induced enhancement of antiferromagnetic spin correlations in Mn2−xFexBO4 by Kazak, N.V., Platunov, M.S., Knyazev, Yu.V., Moshkina, E.M., Gavrilkin, S.Yu, Bayukov, O.A, Gorev, M.V., Pogoreltsev, E.I., Zeer, G.M., Zharkov, S.M., Ovchinnikov, S.G.

“…•The Fe3+ ions distribution was studied by means of Mössbauer Effect.•The progressive increase of afm short-range-order spin correlations was observed.•The…”
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Electronic structure of RSn1.1Ge0.9 (R = Dy, Ho) ternary compounds: Band calculation and optical properties by Knyazev, Yu.V., Lukoyanov, A.V., Kuz’min, Yu.I., Gupta, S., Suresh, K.G.

“…The results of investigations of the electronic structure and optical properties of the compounds DySn1.1Ge0.9 and HoSn1.1Ge0.9 are presented. Our…”
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