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Trimetallic magnetite-Ti-Au nanoparticle formation: A theoretical approach / A. S. Fedorov, E. A. Kovaleva, A. E. Sokolov [et al.] // Mater. Chem. Phys. - 2021. - Vol. 271. - Ст. 124847, DOI 10.1016/j.matchemphys.2021.124847. - Cited References: 46. - The reported study was funded by Joint Research Project of Russian Foundation for Basic Research # 19-52-52002 and Ministry of Science and Technology, Taiwan MOST # 109-2112-M-153-003 and # 108-2923-M-153-001-MY3 . - ISSN 0254-0584
Кл.слова (ненормированные):
Magnetite -- Gold core-shell nanoparticles -- DFT calculations -- Magnetite -- Nanomedicine
Аннотация: Geometric, electronic and magnetic structure of planar slabs consisting of magnetite Fe3O4, titanium and gold layers are investigated by DFT-GGA calculations. It is assumed that these slabs can be used to simulate the upper layers of magnetite nanoparticles covered with an intermediate layer of titanium and a gold layer on the surface. Specific energies and spreading parameters (wettability) of the magnetite-gold, magnetite-titanium and titanium-gold interfaces are calculated. The specific energy and spreading parameter of the magnetite-gold interface is found to be negative, while these values of the magnetite-titanium (for thin Ti layer) and magnetite-titan-gold interfaces are significantly positive. This allows us to hope that the intermediate thin layer of titanium at the boundary between the surface of the magnetite nanoparticle and the gold layer stabilizes this three-layer structure and allows obtaining magnetite nanoparticles covered with continuous gold coating.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Tomsk State University, Tomsk, 634050, Russian Federation
National Pingtung University, Pingtung City, Pingtung County 90003, Taiwan

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Kovaleva, E. A.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Visotin, M. A.; Высотин, Максим Александрович; Lin, C. R.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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Square plate shaped magnetite nanocrystals / S. V. Komogortsev, S. V. Stolyar, L. A. Chekanova [et al.] // J. Magn. Magn. Mater. - 2021. - Vol. 527. - Ст. 167730, DOI 10.1016/j.jmmm.2021.167730. - Cited References: 42. - This work was supported by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research projects No. 20-42-240001 and 20-42-242902 and by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3). We are grateful to the Center of collective use of FRC KSC SB RAS for the provided equipment . - ISSN 0304-8853
Кл.слова (ненормированные):
Magnetite -- Nanoparticles -- Magnetic anisotropy
Аннотация: Square plate shaped magnetite nanocrystals have been synthesized by chemical precipitation from solution using arabinogalactan. A high crystal quality was observed in the plate plane while, across the plate, there is some stratification. The magnetic hysteresis in such particles is determined by the bulk magnetocrystalline anisotropy, plate shape anisotropy, and surface magnetic anisotropy. It is shown using the micromagnetic simulation that the ferromagnetic square nanoplates exhibit the extraordinary magnetization switching anisotropy, which should be taken into account for understanding the hysteretic properties of the particles.

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Держатели документа:
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Stolyar, S. V.; Столяр, Сергей Викторович; Chekanova, L. A.; Чеканова, Лидия Александровна; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Eroshenko, P. E.; Ерошенко, П. Е.; Iskhakov, R. S.; Исхаков, Рауф Садыкович
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Effects of modified magnetite nanoparticles on bacterial cells and enzyme reactions / L. S. Bondarenko, E. S. Kovel, K. A. Kydralieva [et al.] // Nanomaterials. - 2020. - Vol. 10, Is. 8. - Ст. 1499. - P. 1-20, DOI 10.3390/nano10081499. - Cited References: 83. - This research was funded by the Russian Foundation for Basic Research (#19-315-50048, #19-33-90149, and #18-29-19003) . - ISSN 2079-4991
Кл.слова (ненормированные):
Magnetite nanoparticles -- Humic acids-coated magnetite nanoparticles -- Silica-coated magnetite nanoparticles -- Zeta potential -- Hydrodynamic diameter -- Toxicity -- Bioluminescence -- Bacterial assay -- Enzymatic assay -- Oxidative stress -- Photobacterium phosphoreum -- NADH:FMN-oxidoreductase -- Luciferase
Аннотация: Current paper presents biological effects of magnetite nanoparticles (MNPs). Analyzing effects of MNP’ characteristics (zeta-potential and hydrodynamic diameters) on bacteria and their enzyme reactions was the main focus. Photobacterium phosphoreum and bacterial enzymatic reactions were chosen as bioassays. Three types of MNPs were under study: bare Fe3O4, Fe3O4 modified with 3-aminopropyltriethoxysilane (Fe3O4/APTES), and humic acids (Fe3O4/HA). Effects of the MNPs were studied at a low concentration range (< 2 mg/L) and attributed to availability and oxidative activity of Fe3+, high negative surface charge, and low hydrodynamic diameter of Fe3O4/HA, as well as higher Fe3+ content in suspensions of Fe3O4/HA. Low-concentration suspensions of bare Fe3O4 provided inhibitory effects in both bacterial and enzymatic bioassays, whereas the MNPs with modified surface (Fe3O4/APTES and Fe3O4/HA) did not affect the enzymatic activity. Under oxidative stress (i.e., in the solutions of model oxidizer, 1,4-benzoquinone), MNPs did not reveal antioxidant activity, moreover, Fe3O4/HA demonstrated additional inhibitory activity. The study contributes to the deeper understanding of a role of humic substances and silica in biogeochemical cycling of iron. Bioluminescence assays, cellular and enzymatic, can serve as convenient tools to evaluate bioavailability of Fe3+ in natural dispersions of iron-containing nanoparticles, e.g., magnetite, ferrihydrite, etc.

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Держатели документа:
Moscow Aviation Institute (National Research University), Moscow, 125993, Russian Federation
Institute of Physics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Biophysics SB RAS, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Problems of Chemical Physics RAS, Moscow Region, Chernogolovka, 142432, Russian Federation
University of Szeged, Szeged, H-6720, Hungary
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Bondarenko, L. S.; Kovel, E. S.; Ковель, Екатерина Сергеевна; Kydralieva, K. A.; Dzhardimalieva, G. I.; Illes, E.; Tombacz, E.; Kicheeva, A. G.; Kudryasheva, N. S.
}
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Why the magnetite-gold core-shell nanoparticles are not quite good and how to improve them / A. E. Sokolov, O. S. Ivanova, A. S. Fedorov [et al.] // Phys. Solid State. - 2021. - Vol. 63, Is. 10. - P. 1536-1540, DOI 10.1134/S1063783421090365. - Cited References: 35. - This study was supported by the Russian Foundation for Basic Research, project no. 19-52-52002, and the Ministry of Science and Technology of Taiwan, projects MOST nos. 109-2112-M-153-003 and 108-2923-M-153-001-MY3 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
IRON-OXIDE NANOPARTICLES
   TOTAL-ENERGY CALCULATIONS
   STABILITY
   DESIGN
Кл.слова (ненормированные):
core-shell magnetic nanoparticles -- magnetite-gold interface -- magnetite-titanium-gold trilayer
Аннотация: The nature of the formation of a chemical bond at the magnetite-gold interface has been studied. The geometric structure and the electronic and magnetic properties of plane layers consisting of magnetite Fe3O4 and gold have been investigated using the DFT-GGA calculation. It has been found that the specific energy and the wetting parameter of the magnetite-gold interface are negative, which leads to the island growth of small Au particles on the Fe3O4 surface. The role of an intermediate thin titanium layer between magnetite and gold has been discussed. The specific energy and wetting parameter of the magnetite-titanium (for thin Ti layers) and magnetite-titanium-gold interfaces are positive. It has been suggested that an intermediate thin titanium layer at the interface between the magnetite nanoparticle surface and the gold layer will make it possible to obtain magnetite nanoparticles with a continuous gold coating.

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Публикация на русском языке Почему наночастицы магнетит/золото со структурой ядро-оболочка недостаточно хороши и как их улучшить [Текст] / А. Э. Соколов, О. С. Иванова, А. С. Федоров [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 9. - С. 1367-1371

Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Tomsk State Univ, Tomsk 634050, Russia.
Natl Pingtung Univ, Pingtung 90003, Pingtung County, Taiwan.

Доп.точки доступа:
Sokolov, A. Е.; Соколов, Алексей Эдуардович; Ivanova, O. S.; Иванова, Оксана Станиславовна; Fedorov, A. S.; Федоров, Александр Семенович; Kovaleva, E. A.; Vysotin, M. A.; Высотин, Максим Александрович; Lin, C-R; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52002]; Ministry of Science and Technology of TaiwanMinistry of Science and Technology, Taiwan [109-2112-M-153-003, 108-2923-M-153-001-MY3]
}
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Spatially resolved GHz magnetization dynamics of a magnetite nano-particle chain inside a magnetotactic bacterium / T. Feggeler, R. Meckenstock, D. Spoddig [et al.] // Phys. Rev. Research. - 2021. - Vol. 3, Is. 3. - Ст. 033036, DOI 10.1103/PhysRevResearch.3.033036. - Cited References: 40. - This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) -Project No. OL513/1-1, 321560838, and in part by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) -Project-ID 405553726 TRR 270. M.F. acknowledges support by the government of the Russian Federation (agreement No. 075-15-2019-1886). We gratefully acknowledge A. Ney for fruitful discussions. The use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515 . - ISSN 2643-1564

РУБ Physics, Multidisciplinary
Рубрики:
AQUASPIRILLUM-MAGNETOTACTICUM
ELECTRON-MICROSCOPY
SP-NOV
Аннотация: Understanding magnonic properties of nonperiodic magnetic nanostructures requires real-space imaging of ferromagnetic resonance modes with spatial resolution well below the optical diffraction limit and sampling rates in the 5-100 GHz range. Here, we demonstrate element-specific scanning transmission x-ray microscopydetected ferromagnetic resonance (STXM-FMR) applied to a chain of dipolarly coupled Fe3O4 nano-particles (40-50 nm particle size) inside a single cell of a magnetotactic bacterium Magnetospirillum magnetotacticum. The ferromagnetic resonance mode of the nano-particle chain driven at 6.748 GHz and probed with 50 nm x-ray focus size was found to have a uniform phase response but non-uniform amplitude response along the chain segments due to the superposition of dipolar coupled modes of chain segments and individual particles, in agreement with micromagnetic simulations.

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Держатели документа:
Univ Duisburg Essen, Fac Phys, D-47048 Duisburg, Germany.
Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, D-47048 Duisburg, Germany.
Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany.
Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany.
SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Carl von Ossietzky Univ Oldenburg, Sch Math & Sci, D-26129 Oldenburg, Germany.
Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.

Доп.точки доступа:
Feggeler, Thomas; Meckenstock, Ralf; Spoddig, Detlef; Zingsem, Benjamin W.; Ohldag, Hendrik; Wende, Heiko; Farle, M.; Фарле, Михаель; Winklhofer, Michael; Ollefs, Katharina J.; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)German Research Foundation (DFG) [405553726 TRR 270, OL513/1-1, 321560838]; government of the Russian Federation [075-15-2019-1886]; US Department of Energy, Office of Science, Office of Basic Energy SciencesUnited States Department of Energy (DOE) [DE-AC02-76SF00515]
}
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Surface modification of Magnetite nanoparticles for their applications / A. Е. Sokolov, O. S. Ivanova, E. S. Svetlitsky [et al.] // 4th International Baltic Conference on Magnetism (IBCM 2021) : Book of abstracts. - 2021. - P. 197. - Cited References: 2. - The reported study was funded by RFBR, project number The reported study was funded by Joint Research Project of Russian Foundation for Basic Research # 19-52-52002 and Ministry of Science and Technology, Taiwan MOST # 109-2112-M-153-003 and # 108-2923-M-153-001-MY3.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS

Доп.точки доступа:
Sokolov, A. Е.; Соколов, Алексей Эдуардович; Ivanova, O. S.; Иванова, Оксана Станиславовна; Svetlitsky, E. S.; Petrov, D. A.; Петров, Дмитрий Анатольевич; Edelman, I. S.; Эдельман, Ирина Самсоновна; Spivakov, A. A.; Lin, C. R.; International Baltic Conference on Magnetism: focus on nanobiomedicine and smart materials(4 ; 2021 ; Aug. 29-Sept. 2 ; Svetlogorsk, Russia); Балтийский федеральный университет им. И. Канта
}
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Dimethylsulfoxide as a media for one-stage synthesis of the Fe3O4-based ferrofluids with a controllable size distribution / V. L. Kirillov [et al.] // Mater. Chem. Phys. - 2019. - Vol. 225. - P. 292-297, DOI 10.1016/j.matchemphys.2019.01.003. - Cited References: 36. - This work was supported by the Russian Science Foundation , project no. 17-12-01111. . - ISSN 0254-0584
Кл.слова (ненормированные):
Ferrofluid -- Magnetite nanoparticles -- One-step synthesis -- Superparamagnetic nanoparticles -- Ferromagnetic resonance
Аннотация: The ultrafine (d = 4 nm) magnetite ferrofluid with a narrow nanoparticle size distribution has been synthesized in one stage at room temperature from a solution of iron(II) and (III) chlorides in dimethylsulfoxide (DMSO) with the propylene epoxide admixture. This is the first example of obtaining a stable concentrated ultrafine magnetite/DMSO ferrofluid at room temperature. X-ray diffraction, transmission electron microscopy, ferromagnetic resonance, Mossbauer spectroscopy, and magnetostatic study have been used to elucidate the role of DMSO and the H2O/DMSO ratio in the formation of a stable colloid with a desired nanoparticle size. The initial stages of the magnetite nanoparticles formation have been investigated by the ferromagnetic resonance technique.

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Держатели документа:
Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kirillov, V. L.; Yakushkin, S. S.; Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Yatsenko, D. A.; Martyanov, O. N.
}
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Снижение засоренности конечного концентрата на Абагурской обогатительной фабрике / И. М. Ганженко [и др.] // Черная металлургия : Бюлл. науч.-тех. и экономич. информации . - 2017. - № 3. - С. 39-44 . - ISSN 0135-5910
Кл.слова (ненормированные):
обогатительная фабрика -- мокрое обогащение -- засоренность конечного концентрата -- магнетитовое железо -- магнитные системы сепараторов -- феррит бария -- неодим-железо-бор -- напряженность магнитного поля -- concentration plant -- wet concentration -- final concentrates dirtiness -- magnetite iron -- magnetic separator systems -- Barium ferrite -- Nd-Fe-B composite -- magnetic field strength
Аннотация: Приведены результаты изучения засоренности конечного концентрата Абагурской обогатительной фабрики ОАО “Евразруда”. Установлены достижимые границы разделения по содержанию магнетитового железа для сепараторов ПБМ с магнитными системами из композита Nd-Fe-B. Рекомендовано полностью заменить в магнитных системах сепараторов ПБМ феррит бария на композит неодим-железо-бор.
The results of the investigation into the dirtiness of the final concentrates at the Abagurskaya Concentration Plant at the OAO “Evrazruda” have been presented. The achievable limits of the separation according to the magnetite iron content in case of the PBM separator with the magnetic systems from the Nd-Fe-B composite have been established. It has been recommended to fully replace the barium ferrite by the Nd-Fe-B composite in the magnetic systems of the PBM separators.

РИНЦ
Держатели документа:
Институт физики Сибирского отделения РАН
ОАО “Евразруда”, Абагурский филиал

Доп.точки доступа:
Ганженко, Игорь Михайлович; Ganzhenko I. M.; Якубайлик, Эдуард Константинович; Yakubailik, E. K.; Зарщикова, Г. Г.; Камалова, Т. Б.; Алексеева, Л. А.
}
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Characterization and magnetic properties study for magnetite nanoparticles obtained by pulsed laser ablation in water / V. A. Svetlichnyi [et al.] // Appl. Phys. A. - 2017. - Vol. 123, Is. 12. - Ст. 763, DOI 10.1007/s00339-017-1390-7. - Cited References: 40. - This work was conducted as a government task of the Ministry of Education and Science of the Russian Federation, Project Number 3.9604.2017/8.9. . - ISSN 0947-8396
Кл.слова (ненормированные):
Magnetite -- Pulsed laser ablation -- Nanoparticles -- Dispersion
Аннотация: Magnetite (Fe3O4) nanoparticles of 1–10 nm (with the maximum at 2 nm) were obtained via pulsed laser ablation of iron target in water in form of a stable dispersion without addition of surfactants and stabilizers. The structure of the material obtained was investigated using transmission electron microscopy, scanning electron microscopy, and Brunauer–Emmett–Teller methods. To investigate the composition of the particles in the sample, such methods as Fourier transform infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, and X-ray diffraction, were applied. Magnetite phase was found to be sufficiently pure, it was not contaminated by other iron oxide phases and contained not more than 0.5% of metallic iron in form of large particles. The study of the magnetic properties of the magnetite nanoparticles obtained has shown that they exhibit ferrimagnetic behavior at room temperature with the paramagnetic contribution explained by the presence of fine superparamagnetic particles.

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Держатели документа:
Tomsk State University, Lenina ave., 36, Tomsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, bld. 38, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Svetlichnyi, V. A.; Shabalina, A. V.; Lapin, I. N.; Goncharova, D. A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович
}
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10.

Synthesis and characterization of plate-like magnetite nanoparticles / S. V. Stolyar [et al.] // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст. C.P13. - P. 292-293. - Cited References: 3. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Projects No. 18-43-243003 and No. 18-42-240006. The work is supported by the Special Program of the Ministry of Education and Science of the Russian Federation for the Siberian Federal University . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS Krasnoyarsk, Russia

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Stolyar, S. V.; Столяр, Сергей Викторович; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Latyshev, N. V.; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
Нет сведений об экземплярах (Источник в БД не найден)
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11.

Magnetite Nanocrystals with a High Magnetic Anisotropy Constant due to the Particle Shape / S. V. Stolyar [et al.] // Tech. Phys. Lett. - 2019. - Vol. 45, Is. 9. - P. 878-881, DOI 10.1134/S1063785019090116. - Cited References: 20. - This study was supported in part by the Russian Foundation for Basic Research, Government of Krasnoyarsk Krai, Science Foundation of Krasnoyarsk Krai within research projects nos. 18-42-240006 (“Nanomaterials with Magnetic Properties Determined by the Nanostructure Topological Features”) and 18-43-243003 (“Sonochemical Treatment of Magnetic Nanoparticles As a Way of Modifying Their Properties”) and a special program of the Ministry of Education and Science of the Russian Federation for Siberian Federal University. . - ISSN 1063-7850
Кл.слова (ненормированные):
magnetite -- nanoparticles -- magnetic anisotropy -- polysaccharide
Аннотация: 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 constant of particles is several times higher than that of spherical magnetite particles, which enhances the hysteretic properties with a small particle volume retained.

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Публикация на русском языке

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Subdivision of Federal Krasnoyarsk Science Center,Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Federal Research Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
B.B. Gorodovikov Kalmyk State University, Elista, 358000, Russian Federation
Al-Qasim Green University, College of Biotechnology, Babylon, Iraq

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Chekanova, L. A.; Чеканова, Лидия Александровна; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Cheremiskina, E. V.; Bairmani, M. S.; Eroshenko, P. E.; Ерошенко, П. Е.; Iskhakov, R. S.; Исхаков, Рауф Садыкович
}
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12.

Crystal texture-dependent magnetic and magnetotransport properties of half-metallic Fe3O4 films grown on oxidized Si substrates by reactive deposition / V. V. Balashev [et al.] // J. Alloys Compd. - 2020. - Vol. 815. - Ст. 152398, DOI 10.1016/j.jallcom.2019.152398. - Cited References: 58. - his work is supported in part by the Russian Ministry of Science and Higher Education under the state tasks ( 3.5178.2017/8.9 and 3.4956.2017 ), by Act 211 of the Government of the Russian Federation (contract No. 02.A03.21.0011 ) and by the Comprehensive Program of Basic Research of the Far Eastern Branch of the Russian Academy of Sciences “Far East” 2018–2020 № 18-3-022 ( 0226-18-0031 ). . - ISSN 0925-8388
Кл.слова (ненормированные):
Magnetite -- Crystal texture -- Reactive deposition -- Magnetoresistance -- Magnetic saturation -- FORC
Аннотация: Nanocrystalline magnetite (Fe3O4) films with various preferred crystallite orientations were grown on oxidized silicon surface by reactive iron deposition in an oxygen atmosphere. Depending on the partial pressure of oxygen (PO2), the evolution of the structural, magnetic, and magnetotransport properties of the grown films was investigated. We found that the growth of films containing only the Fe3O4 phase occurs in a certain PO2 range, and the magnetite crystallites may have (311) or (110) preferred orientation. It was revealed that films with (311) and (110) textures have a column structure. An increase in the PO2 leads to a structure transformation from (311) to (110) texture with larger crystallites. A film with (110) texture showed higher values of saturation magnetization, magnetoresistance and spin polarization. The analysis of approach to magnetic saturation revealed that the local magnetic anisotropy of crystallites in textured films is much higher than the anisotropy of bulk magnetite due to the large surface contribution. The FORC diagram method in combination with the approach to magnetic saturation proved the existence of the exchange coupling between large and small grains. Our results open the reliable route for crystal texture-depending manipulation of functional properties of thin magnetite films for advanced spintronic applications.

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Держатели документа:
School of Natural Sciences, Far Eastern Federal University, Vladivostok, Russian Federation
Institute of Automation and Control Processes, FEB RAS, Vladivostok, Russian Federation
Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
National Research South Ural State University, Chelyabinsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balashev, V. V.; Ermakov, K. S.; Samardak, A. Y.; Ognev, A. V.; Samardak, A. S.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Tarasov, A. S.; Тарасов, Антон Сергеевич; Korobtsov, V. V.
}
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13.

Iron oxide nanoparticles synthesized by a glycine-modified coprecipitation method: Structure and magnetic properties / A. Omelyanchik, A. S. Kamzin, A. A. Valiullin [et al.] // Colloids Surf. A Physicochem. Eng. Asp. - 2022. - Vol. 647. - Ст. 129090, DOI 10.1016/j.colsurfa.2022.129090. - Cited References: 80. - This work was supported by the Russian Science Foundation grant No. 21-72-20158 . The study of the structure was carried out on the equipment of the Center Collective Use " Materials Science and Metallurgy " which was purchased with the financial support of the Russian Federation represented by the Ministry of Education and Science (No. 075-15-2021-696) . - ISSN 0927-7757
Кл.слова (ненормированные):
Magnetic nanoparticles -- Iron oxide -- Magnetite -- Maghemite -- Glycine -- Mossbauer spectroscopy -- Coprecipitation
Аннотация: Iron oxide magnetic nanoparticles (MNPs) are of interest in biomedicine and research owing to their moderate cytotoxicity and advanced properties, such as extensive surface-to-volume ratio and possibilities for tailoring their functionality through surface chemistry. To date, various approaches have been used for the synthesis of MNPs with controllable structural properties and various coatings to enhance their stability and functionality. This study describes a modified one-step method of coprecipitation in the presence of glycine allowing the production of particles with controllable size and in situ surface decoration. The effect of different glycine concentrations on the morphostructural and magnetic properties of iron oxide MNPs is studied. The particle size is reduced from 10.2 ± 0.3 to 7.2 ± 0.5 nm by increasing the glycine concentration from 0.06 up to 0.60 mol. The magnetic properties of obtained particles were tracked by SQUID magnetometry and Mossbauer spectroscopy. All samples of glycine capped iron oxide MNPs showed superparamagnetic behaviour at room temperature with maximal value of the saturation magnetization of 69 ± 4 Am2/kg. The results show the optimal concentration range of glycine which can be used in this method: a lower concertation than 0.15 mol does not affect the properties of obtained particles while higher concentrations than 0.3 mol lead to the reduction of magnetic properties (the saturation magnetisation reduces to 59 ± 3 Am2/kg when glycine concentration was 0.6 mol). The proposed economic and environment-friendly approach can be utilized to synthesise –NH2 functionalised MNPs for biomedical or wastewater treatment.

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Держатели документа:
Immanuel Kant Baltic Federal University, Kaliningrad, Russian Federation
Department of Chemistry and Industrial Chemistry (DCIC), University of Genova, Genova, Italy
Ioffe Institute of Russian Academy of Science (RAS), St. Petersburg, Russian Federation
Kazan Federal University, Kazan, Russian Federation
St. Petersburg State University, St. Petersburg, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center Siberian branch RAS, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
The National University of Science and Technology MISIS, Moscow, Russian Federation
Institute of Structure of Matter–CNR, Monterotondo Stazione, Rome, 00016, Italy

Доп.точки доступа:
Omelyanchik, A.; Kamzin, A. S.; Valiullin, A. A.; Semenov, V. G.; Vereshchagin, S. N.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sviridova, T.; Kozenkov, I.; Dolan, E.; Peddis, D.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Rodionova, V.
}
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14.

    Magnetite nanoparticles diluted with Co and Mg ions: magnetic properties and application / O. S. Ivanova, E. S. Svetlitsky, D. A. Petrov, Yu. V. Knyazev // Магнитные материалы. Новые технологии : тез. докл. IX Байкал. междунар. конф. BICMM-2023 / чл. прогр. ком.: S. S. Aplesnin [et al.] ; чл. орг. ком. R. S. Iskhakov [et al.]. - Иркутск, 2023. - P. 93, DOI 10.26516/978-5-9624-2178-0.2023.1-207. - Библиогр.: 1 . - ISBN 978-5-9624-2178-0
   Перевод заглавия: Наночастицы магнетита, разбавленные ионами Co и Mg: магнитные свойства и применение

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Держатели документа:
Kirensky Institute of Physics SB RAS
Siberian Federal University

Доп.точки доступа:
Aplesnin, S. S. \чл. прогр. ком.\; Аплеснин, Сергей Степанович; Balaev, D. A. \чл. прогр. ком.\; Балаев, Дмитрий Александрович; Ovchinnikov, S. G. \чл. прогр. ком.\; Овчинников, Сергей Геннадьевич; Iskhakov, R. S. \чл. орг. ком.\; Исхаков, Рауф Садыкович; Ivanova, O. S.; Иванова, Оксана Станиславовна; Svetlitsky, E. S.; Petrov, D. A.; Петров, Дмитрий Анатольевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Байкальская международная конференция "Магнитные материалы. Новые технологии"(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Magnetic materials. New tecnologies", Baikal International Conference(9 ; 2023 ; Sept. ; 11-14 ; Baikalsk); Иркутский государственный университет
}
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15.

Magneto-optical properties of nanoparticle dispersions based on Fe3O4, obtained by pulse laser ablation in a liquid / O. V. Solodova, A. E. Sokolov, O. S. Ivanova [et al.] // Phys. Solid State. - 2022. - Vol. 64, Is. 14. - P. 2292-2299, DOI 10.21883/PSS.2022.14.54331.147. - Cited References: 39. - The authors would like to thank Dr. Phys.-Math. Sci., Professor I.S. Edelman for participating in the discussion of the study results and significant comments when writing the article. This study was supported by the Russian Foundation for Basic Research, grant No. 19-52-52002 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
pulsed laser ablation -- nanoparticles -- colloidal solutions -- magnetite -- magnetic circular dichroism
Аннотация: The structure, optical and magneto-optical properties of colloidal solutions of iron oxide nanoparticles obtained by pulsed ablation in distilled water, both without additives and with various functional additives: gold-hydrochloric acid, silicon oxide, and polyvinylpyrrolidone, have been studied. It is shown that the main magnetic phase is magnetite Fe3O4. The size distribution of nanoparticles and the degree of their agglomeration depend on the additives. In the absence of the latter, a very wide of size distributions and strong agglomeration of particles are observed. The narrowest distribution curve with a maximum corresponding to ~7 nm and an almost complete absence of agglomeration are observed for particles synthesized in the presence of polyvinylpyrrolidone. The shape of the spectral dependence of magnetic circular dichroism, which generally corresponds to the spectrum of magnetite, undergoes some modifications for various additives, which is associated with defects in the distribution of iron ions between different positions in the crystal.

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Публикация на русском языке Магнитооптические свойства дисперсий наночастиц на основе Fe3O4, полученных методом импульсной лазерной абляции в жидкости [Текст] / О. В. Солодова, А. Э. Соколов, О. С. Иванова [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 12. - С. 2061-2069

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Immanuel Kant Baltic Federal University, Kaliningrad, Russia
Tomsk State University, Tomsk, Russia

Доп.точки доступа:
Solodova, O. V.; Солодова, О. В.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Ivanova, O. S.; Иванова, Оксана Станиславовна; Volochaev, M. N.; Волочаев, Михаил Николаевич; Lapin, I. N.; Goncharova, D. A.; Svetlichnyi, V. A.
}
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16.

Functionalized magnetite nanoparticles: Characterization, bioeffects, and role of reactive oxygen species in unicellular and enzymatic systems / A. G. Kicheeva, E. S. Sushko, L. S. Bondarenko [et al.] // Int. J. Mol. Sci. - 2023. - Vol. 24, Is. 2. - Ст. 1133, DOI 10.3390/ijms24021133. - Cited References: 125. - This research was funded by Russian Science Foundation, N 22-73-10222 . - ISSN 1661-6596. - ISSN 1422-0067
Кл.слова (ненормированные):
magnetite nanoparticles -- surface modification -- humic acids -- organosilane -- reactive oxygen species -- toxicity -- bioluminescence assay -- bacteria -- enzymes -- oxidative stress -- prooxidant -- ferroptosis
Аннотация: The current study evaluates the role of reactive oxygen species (ROS) in bioeffects of magnetite nanoparticles (MNPs), such as bare (Fe3O4), humic acids (Fe3O4-HA), and 3-aminopropyltriethoxysilane (Fe3O4-APTES) modified MNPs. Mössbauer spectroscopy was used to identify the local surrounding for Fe atom/ions and the depth of modification for MNPs. It was found that the Fe3O4-HA MNPs contain the smallest, whereas the Fe3O4-APTES MNPs contain the largest amount of Fe2+ ions. Bioluminescent cellular and enzymatic assays were applied to monitor the toxicity and anti-(pro-)oxidant activity of MNPs. The contents of ROS were determined by a chemiluminescence luminol assay evaluating the correlations with toxicity/anti-(pro-)oxidant coefficients. Toxic effects of modified MNPs were found at higher concentrations (>10−2 g/L); they were related to ROS storage in bacterial suspensions. MNPs stimulated ROS production by the bacteria in a wide concentration range (10−15–1 g/L). Under the conditions of model oxidative stress and higher concentrations of MNPs (>10−4 g/L), the bacterial bioassay revealed prooxidant activity of all three MNP types, with corresponding decay of ROS content. Bioluminescence enzymatic assay did not show any sensitivity to MNPs, with negligible change in ROS content. The results clearly indicate that cell-membrane processes are responsible for the bioeffects and bacterial ROS generation, confirming the ferroptosis phenomenon based on iron-initiated cell-membrane lipid peroxidation.

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Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Federal Research Center “Krasnoyarsk Science Center” of Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Institute of Physics of Siberian Branch of Russian Academy of Sciences, Federal Research Center “Krasnoyarsk Science Center” of Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Department of General Engineering, Moscow Aviation Institute, Moscow, 125993, Russian Federation
Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
Sklifosovsky Research Institute for Emergency Medicine, Moscow, 129010, Russian Federation
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka, 142432, Russian Federation
Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, P.le Fermi, 1, Portici, 80055, Italy
Biophysics Department, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Kicheeva, A. G.; Sushko, E. S.; Сушко, Екатерина Сергеевна; Bondarenko, L. S.; Kydralieva, K. A.; Pankratov, D. A.; Tropskaya, N. S.; Dzeranov, A. A.; Dzhardimalieva, G. I.; Zarrelli, M.; Kudryasheva, N. S.
}
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17.

Fe3O4/Au nanocomposites: Characterization and cytotoxicity effects in vitro / R. N. Yaroslavtsev, A. V. Tyumentseva, D. A. Velikanov [et al.] // Mater. Chem. Phys. - 2024. - Vol. 322. - Ст. 129524, DOI 10.1016/j.matchemphys.2024.129524. - Cited References: 44 . - ISSN 0254-0584. - ISSN 1879-3312
Кл.слова (ненормированные):
Magnetic nanoparticles -- Magnetite -- Gold nanoparticles -- Cytotoxicity
Аннотация: Magnetic nanocomposites containing iron oxide and gold components take great attention last years because of their relative biocompatibility and the ability to combine the magnetic properties of iron and the chemical bonding properties of gold for the possible drug delivery or diagnostics for various diseases. However, such particles have some toxicity to living cells, and the effect depends on many factors, including size, shape, the ratio of components in the composites, and the type of cells affected. And thus, the search for compositions and technologies for producing iron-gold particles with improved properties and reduced cytotoxicity remains relevant. The aim of the study was to synthesize and characterize Fe3O4/Au nanocomposites and evaluate their influence on living cells using the example of cell line HEK293. Fe3O4 nanoparticles (NPs) were synthesized by co-precipitation of Fe2+/Fe3+ water solution in alkaline conditions and then boiled with HAuCl4 in 0.1 M sodium citrate. The NPs properties were estimated by transmission electron microscopy (TEM), vibration magnetometry and ferromagnetic resonance (FMR). According to magnetometric measurements, nanoparticles are mainly in a superparamagnetic state. By fitting magnetization curves, the magnetic characteristics of nanoparticles were determined: saturation magnetization (59.3 emu/g) and magnetic anisotropy constant (K = 0.86·105 erg/cm3). The average particle size estimated from magnetic measurements was 8.7 nm. Considering the presence of a magnetically dead layer, this is in good agreement with the TEM results. The temperature dependence of the FMR linewidth was analyzed using two models. As a result, the parameters MSV and K/MS were determined. The models used showed good agreement. The values of the anisotropy constant (K = 1.06·105 erg/cm3) and the average particle size (6.8 nm) are estimated. The effect of the NPs on the HEK293 cells was studied by MTT-assay, flow cytometry and RT-PCR. The exposure with the NPs lead to a significant decrease of cell metabolic activity in HEK293 cell culture, but this effect was not accompanied by cell death. It was shown that the expression of antioxidant enzymes SOD1 and GPX1 was reduced at the mRNA stage. So the NPs synthesized may affect gene expression and metabolism of HEK293 cells, but this does not have fatal consequences for cell viability.

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Держатели документа:
Krasnoyarsk Science Center, Federal Research Center KSC SB RAS, Akademgorodok 50, Krasnoyarsk, 660036, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Tyumentseva, A.V.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vazhenina, I. G.; Важенина, Ирина Георгиевна; Volochaev, M. N.; Волочаев, Михаил Николаевич; Stolyar, S. V.; Столяр, Сергей Викторович
}
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18.

Core-shell magnetite nanoparticles: morphology, magnetic properties, organic dyes adsorption / O. S. Ivanova, I. S. Edelman, E. S. Svetlitsky [et al.] // International conference "Functional materials" : book of abstracts / ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2023. - P. 114. - Cited References: 1. - РФН № 23-22-10025

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS,
Siberian Federal University
National Pingtung University, 90003, Pingtung City, Taiwan

Доп.точки доступа:
Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Ovchinnikov, S. G. \org. com.\; Овчинников, Сергей Геннадьевич; Ivanova, O. S.; Иванова, Оксана Станиславовна; Edelman, I. S. (Edel'man, I. S.); Эдельман, Ирина Самсоновна; Svetlitsky, E. S.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Zharkov, S. M.; Жарков, Сергей Михайлович; Petrov, D. A.; Петров, Дмитрий Анатольевич; Sukhachev, A. L.; Сухачев, Александр Леонидович; Toropova, E. S.; Chun-Rong Lin; Ying-Zhen Chen; "Functional materials", International conference(2023 ; Oct. 2-6 ; Crimea, Foros); Крымский федеральный университет имени В.И. Вернадского
}
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19.

Core-shell exchange interaction effect in the approach to magnetic saturation of a magnetite-like nanoparticle / S. V. Komogortsev, S. V. Stolyar, R. S. Iskhakov, A. A. Mohov // V International Baltic Conference on Magnetism. IBCM : Book of abstracts. - 2023. - P. 40

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Federal Research Center KSC SB RAS

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Stolyar, S. V.; Столяр, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Mohov, A. A.; International Baltic Conference on Magnetism(5 ; 2023 ; Aug. 20-24 ; Svetlogorsk, Russia); Балтийский федеральный университет им. И. Канта
}
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20.

    The manifestation of stoichiometry deviation in silica-coated magnetite nanoparticles / S. V. Stolyar, D. A. Velikanov, A. V. Tyumentseva [et al.] // VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. M : Magnetism in biology and medicine. - Ст. M.P15. - P. 451-453. - Cited References: 4. - The study was supported by the Russian Science Foundation and the Krasnoyarsk Region Science and Technology Support Fund., grant No. 22-14-20020 . - ISBN 978-5-94469-051-7
   Перевод заглавия: Проявление отклонения от стехиометрии в наночастицах магнетита, покрытых кремнезёмом

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Tyumentseva, A. V.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
}
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