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    Carbon double coated Fe3O4@C@C nanoparticles: Morphology features, magnetic properties, dye adsorption / C. R. Lin, O. S. Ivanova, I. S. Edelman [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 3. - Ст. 376, DOI 10.3390/nano12030376. - Cited References: 44. - The work was supported financially by the Russian Foundation for Basic Research, Grant No. 19-52-52002 and Ministry of Science and Technology of Taiwan, Grants MOST No. 108-2923-M-153-001-MY3 and No. 109-2112-M-153-003-. The support was obtained also from the Joint Scientific Center of the Siberian Federal University supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation, where the Transmission Electron Microscopy studies were carried out . - ISSN 2079-4991
   Перевод заглавия: Наночастицы Fe3O4@C@C с двойным углеродным покрытием: Морфологические особенности, магнитные свойства, адсорбция красителей

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
SOLID-PHASE EXTRACTION
FE3O4 NANOPARTICLES
PROFILE REFINEMENT
Кл.слова (ненормированные):
core-shell Fe3O4@C nanoparticles -- core-shell Fe3O4@C@C nanoparticles -- magnetic properties -- dyes adsorption
Аннотация: This work is devoted to the study of magnetic Fe3O4 nanoparticles doubly coated with carbon. First, Fe3O4@C nanoparticles were synthesized by thermal decomposition. Then these synthesized nanoparticles, 20–30 nm in size were processed in a solution of glucose at 200 °C during 12 h, which led to an unexpected phenomenon – the nanoparticles self-assembled into large conglomerates of a regular shape of about 300 nm in size. The morphology and features of the magnetic properties of the obtained hybrid nanoparticles were characterized by transmission electron microscopy, differential thermo-gravimetric analysis, vibrating sample magnetometer, magnetic circular dichroism and Mössbauer spectroscopy. It was shown that the magnetic core of Fe3O4@C nanoparticles was nano-crystalline, corresponding to the Fe3O4 phase. The Fe3O4@C@C nanoparticles presumably contain Fe3O4 phase (80%) with admixture of maghemite (20%), the thickness of the carbon shell in the first case was of about 2–4 nm. The formation of very large nanoparticle conglomerates with a linear size up to 300 nm and of the same regular shape is a remarkable peculiarity of the Fe3O4@C@C nanoparticles. Adsorption of organic dyes from water by the studied nanoparticles was also studied. The best candidates for the removal of dyes were Fe3O4@C@C nanoparticles. The kinetic data showed that the adsorption processes were associated with the pseudo-second order mechanism for cationic dye methylene blue (MB) and anionic dye Congo red (CR). The equilibrium data were more consistent with the Langmuir isotherm and were perfectly described by the Langmuir–Freundlich model.

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Держатели документа:
Natl Pingtung Univ, Dept Appl Phys, Pingtung City 90003, Taiwan.
RAS, FRC KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
RAS, FRC KSC SB, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Lin, Chun-Rong; Ivanova, O. S.; Иванова, Оксана Станиславовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Knyazev, Yu. V.; Князев, Юрий Владимирович; Zharkov, S. M.; Жарков, Сергей Михайлович; Petrov, D. A.; Петров, Дмитрий Анатольевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Svetlitsky, E. S.; Светлицкий, Евгений Сергеевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Solovyov, Leonid A.; Chen, Ying-Zhen; Tseng, Yaw-Teng; 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 [108-2923-M-153-001-MY3, 109-2112-M-153-003]; Joint Scientific Center of the Siberian Federal University [FSRZ-2020-0011]; Ministry of Science and Higher Education of the Russian Federation
}
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    Quaternary selenides EuLnCuSe3: Synthesis, structures, properties and in silico studies / M. V. Grigoriev, L. A. Solovyov, A. V. Ruseikina [et al.] // Int. J. Mol. Sci. - 2022. - Vol. 23, Is. 3. - Ст. 1503, DOI 10.3390/ijms23031503. - Cited References: 90 . - ISSN 1422-0067
   Перевод заглавия: Четвертичные селениды EuLnCuSe3: синтез, структура, свойства и компьютерное моделирование

РУБ Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
RARE-EARTH
   CRYSTAL-STRUCTURES
   MAGNETIC-PROPERTIES
   THERMOELECTRIC PERFORMANCE
Кл.слова (ненормированные):
inorganic materials -- ab initio calculations -- magnetic measurements -- lattice dynamics -- vibrational spectroscopy -- optical spectroscopy -- negative magnetization
Аннотация: In this work, we report on the synthesis, in-depth crystal structure studies as well as optical and magnetic properties of newly synthesized heterometallic quaternary selenides of the Eu+2Ln+3Cu+1Se3 composition. Crystal structures of the obtained compounds were refined by the derivative difference minimization (DDM) method from the powder X-ray diffraction data. The structures are found to belong to orthorhombic space groups Pnma (structure type Ba2MnS3 for EuLaCuSe3 and structure type Eu2CuS3 for EuLnCuSe3, where Ln = Sm, Gd, Tb, Dy, Ho and Y) and Cmcm (structure type KZrCuS3 for EuLnCuSe3, where Ln = Tm, Yb and Lu). Space groups Pnma and Cmcm were delimited based on the tolerance factor t’, and vibrational spectroscopy additionally confirmed the formation of three structural types. With a decrease in the ionic radius of Ln3+ in the reported structures, the distortion of the (LnCuSe3) layers decreases, and a gradual formation of the more symmetric structure occurs in the sequence Ba2MnS3 → Eu2CuS3 → KZrCuS3. According to magnetic studies, compounds EuLnCuSe3 (Ln = Tb, Dy, Ho and Tm) each exhibit ferrimagnetic properties with transition temperatures ranging from 4.7 to 6.3 K. A negative magnetization effect is observed for compound EuHoCuSe3 at temperatures below 4.8 K. The magnetic properties of the discussed selenides and isostructural sulfides were compared. The direct optical band gaps for EuLnCuSe3, subtracted from the corresponding diffuse reflectance spectra, were found to be 1.87–2.09 eV. Deviation between experimental and calculated band gaps is ascribed to lower d states of Eu2+ in the crystal field of EuLnCuSe3, while anomalous narrowing of the band gap of EuYbCuSe3 is explained by the low-lying charge-transfer state. Ab initio calculations of the crystal structures, elastic properties and phonon spectra of the reported compounds were performed.

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Держатели документа:
Univ Tyumen, Lab Theory & Optimizat Chem & Technol Processes, Tyumen 625003, Russia.
SB RAS, Inst Chem & Chem Technol, Fed Res Ctr KSC, Krasnoyarsk 660036, Russia.
Univ Tyumen, Inst Chem, Tyumen 625003, Russia.
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660079, Russia.
RAS, SB, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Ural Fed Univ, Inst Nat Sci & Math, Mira Str 19, Ekaterinburg 620002, Russia.
Univ Tyumen, Inst Phys & Technol, Tyumen 625003, Russia.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660079, Russia.
Siberian Fed Univ, Sch Engn & Construct, Krasnoyarsk 660041, Russia.
Univ Tyumen, Engn Ctr Composite Mat Based Wolfram Cpds & Rare, Tyumen 625003, Russia.
Univ Stuttgart, Inst Inorgan Chem, D-70569 Stuttgart, Germany.
Kurgan State Univ, Adv Mat Ind & Biomed Lab, Sovetskaya Str 63-4, Kurgan 640020, Russia.
Ural Fed Univ, Innovat Ctr Chem & Pharmaceut Technol, Mira Str 19, Ekaterinburg 620002, Russia.

Доп.точки доступа:
Grigoriev, Maxim V.; Solovyov, Leonid A.; Ruseikina, Anna V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Chernyshev, Vladimir A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Garmonov, Alexander A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Matigorov, Alexey V.; Volkova, Svetlana S.; Ostapchuk, Evgeniy A.; Kertman, Alexander V.; Schleid, Thomas; Safin, Damir A.
}
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    Magnetic and magneto-optical properties of Co-P films prepared by chemical deposition / A. V. Chzhan [et al.] // J. Magn. Magn. Mater. - 2011. - Vol. 323, Is. 20. - P. 2493-2496, DOI 10.1016/j.jmmm.2011.05.024. - Cited Reference Count: 22. - Гранты: This study was supported by the Russian Foundation for Basic Research, Project no. 08-02-00397a and the departmental target program Development of Scientific Potential of Higher Education, 2009-2010, Project no. 2.1.1./4399. - Финансирующая организация: Russian Foundation for Basic Research [08-02-00397a]; departmental target program Development of Scientific Potential of Higher Education [2.1.1./4399] . - OCT. - ISSN 0304-8853
Рубрики:
SPECTROSCOPY
   THICKNESS
   COBALT
Кл.слова (ненормированные):
co-p films -- chemically deposition -- the polar kerr and faraday effects -- hysteresis loops -- chemically deposition -- cop films -- hysteresis loops -- the polar kerr and faraday effects -- chemical deposition -- chemically deposition -- co films -- cop films -- film magnetization -- film surface morphology -- incident light -- magnetic and magneto-optical properties -- magnetic layers -- polar kerr effect -- polar-kerr -- polycrystalline -- underlayers -- chemical analysis -- faraday effect -- hysteresis loops -- kerr magnetooptical effect -- light reflection -- magnetic materials -- optical kerr effect -- palladium -- cobalt
Аннотация: Features in the formation of chemically deposited polycrystalline Co-P films with thicknesses of a few nanometers are established by analyzing film surface morphology and variation in the film magnetization. It is shown that in the thickness range below 30 nm the polar Kerr effect value OK changes nonmonotonically and depends on a wavelength of the incident light. For the films thicker than 30 nm, this value depends weakly on both the thickness and the wavelength. These features in the OK behavior are attributed to the Faraday effect, which is revealed at small thicknesses upon light reflection from the lower surface of a magnetic layer. It is found that the Faraday effect in the Co-P films exceeds that in the Co films by a factor of more than two. This effect is assumed to be caused by the presence of a Pd underlayer in the samples under study. (C) 2011 Elsevier BY. All rights reserved.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Chzhan, A. V.; Patrin, G. S.; Kiparisov, S. Y.; Seredkin, V. A.; Середкин, Виталий Александрович; Burkova, L. V.; Буркова, Людмила Викторовна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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Peculiarities of magnetic properties of Ni-Ge layered films / A. V. Chernichenko [et al.] // TRENDS IN MAGNETISM. - 2011. - Vol. 168-169. - P261-264, DOI 10.4028/www.scientific.net/SSP.168-169.261 . - ISSN 1012-0394
Кл.слова (ненормированные):
exchange bias effect -- magnetic properties -- ni and ge mutual diffusion -- ni-ge layer structures -- surface morphology -- antiferromagnetism -- diffusion -- germanium -- magnetic properties -- magnetization -- morphology -- phase interfaces -- solids -- germanium -- magnetic properties -- magnetization -- nickel -- surface morphology -- temperature distribution -- antiferromagnetic phase -- exchange bias effects -- ge films -- layered films -- low temperatures -- magnetization temperature -- mutual diffusion -- ni and ge mutual diffusion -- ni-ge layer structures -- ge layers -- surface morphology -- magnetism
Аннотация: The surface morphology and magnetic properties of layered Ni-Ge films were investigated. The films surface has been shown to consist of the grains of 2 - 4 nm in height with the average radius of about 40-80 nm. Magnetization temperature dependences are different for FC and ZFC processes; in the latter case, the magnetization maximum is observed near the temperature T m?50K. The exchange bias effect is observed at low temperatures. The results are explained by the formation of the antiferromagnetic phase in the interface between Ni and Ge layers due to the Ge and Ni mutual diffusion.

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Держатели документа:
Kirensky Institute of Physics, SB, RAS, Academgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Chernichenko, A. V.; Черниченко, Ангелина Виталиевна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Marushchenko, D. A.; Марущенко, Дмитрий Анатольевич; Turpanov, I. A.; Турпанов, Игорь Александрович; Patrin, G. S.; Патрин, Геннадий Семёнович; Greben'kova, Yu. E.; Гребенькова, Юлия Эрнестовна
}
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Synthesis and structural and magnetic properties of the NaNiFe2(VO4)3 compound / T. V. Drokina, D. A. Velikanov, O. A. Bayukov [et al.] // Phys. Solid State. - 2021. - Vol. 63, Is. 5. - P. 802-810, DOI 10.1134/S1063783421060056. - Cited References: 19. - We are grateful to V.S. Bondarev for studying the thermal properties of NaNiFe2(VO4)3 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
LiCuFe2(VO4)3
HOWARDEVANSITE
Кл.слова (ненормированные):
multicomponent vanadates -- crystal structure -- magnetic properties
Аннотация: 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 vanadate is described by a triclinic symmetry space group P1. The unit cell contains six nonequivalent mixed cationic positions occupied by different-valence ions of transition metals, iron Fe3+ and nickel Ni2+, which facilitates the implementation of a state with the local charge neutrality violation. In addition, two types of iron atom sites have been found, which have an oxygen environment in the form of octahedra and square pyramids with their nonequiprobable population by iron and nickel. The temperature and field dependences of the magnetization have been found to be typical of a paramagnet containing ferromagnetic clusters in a wide temperature range.

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Публикация на русском языке Синтез, структурные и магнитные свойства NaNiFe2(VO4)3 [Текст] / Т. В. Дрокина, Д. А. Великанов, О. А. Баюков [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 6. - С. 754-762

Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Drokina, T. V.; Дрокина, Тамара Васильевна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Petrakovskii, G. A.; Петраковский, Герман Антонович
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Gold-coated Janus-like Fe-Si magnetic nanoparticles for biomedical applications / A. V. Lukyanenko, I. A. Yakovlev, I. A. Tarasov [et al.] // International conference "Functional materials" : book of abstracts / ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2021. - P. 297. - Библиогр.: 3 назв.

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Доп.точки доступа:
Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Ovchinnikov, S. G. \org. com.\; Овчинников, Сергей Геннадьевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Nemtcev, I.V.; Volochaev, M. N.; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; "Functional materials", International conference(2021 ; Oct. 4-8 ; Alushta, Russia); Крымский федеральный университет имени В.И. Вернадского
}
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Synthesis, structure, and properties of EuLnCuSe3 (Ln = Nd, Sm, Gd, Er) / O. V. Andreev, V. V. Atuchin, A. S. Aleksandrovsky [et al.] // Crystals. - 2022. - Vol. 12, Is. 1. - Ст. 17, DOI 10.3390/cryst12010017. - Cited References: 60. - The study was funded by the Ministry of Science and Higher Education of the Russian Ferderation (Projects AAAA-A21-121011390011-4 and AAAA-A19-119031890025-9), as well as the Government of the Tyumen Region (grant to non-profit organizations No. 2. 89-don, dated 7 December 2020) . - ISSN 2073-4352

РУБ Crystallography + Materials Science, Multidisciplinary
Рубрики:
RARE-EARTH
   CRYSTAL-STRUCTURE
   MAGNETIC-PROPERTIES
   CHALCOGENIDES
Кл.слова (ненормированные):
rare earth elements -- complex sulfides -- chalcogenides -- crystal structure -- magnetic properties
Аннотация: EuLnCuSe3 (Ln = Nd, Sm, Gd, Er), due to their complex composition, should be considered new materials with the ability to purposefully change the properties. Samples of the EuLnCuSe3 were prepared using Cu, rare earth metal, Se (99.99%) by the ampoule method. The samples were obtained by the crystallization from a melt and annealed at temperatures 1073 and 1273 K. The EuErCuSe3 crystal structure was established using the single-crystal particle. EuErCuSe3 crystallizes in the orthorhombic system, space group Cmcm, KCuZrS3 structure type, with cell parameters a = 4.0555 (3), b = 13.3570 (9), and c = 10.4602 (7) Å, V = 566.62 (6) Å3. In structure EuErCuSe3, erbium ions are coordinated by selenium ions in the octahedral polyhedron, copper ions are in the tetrahedral coordination, europium ions are between copper and erbium polyhedra layers and are coordinated by selenium ions as two-cap trigonal prisms. The optical band gap is 1.79 eV. At 4.7 K, a transition from the ferrimagnetic state to the paramagnetic state was detected in EuErCuSe3. At 85 and 293 K, the compound is in a paramagnetic state. According to XRPD data, EuLnCuSe3 (Ln = Nd, Sm, Gd) compounds have a Pnma orthorhombic space group of the Eu2CuS3 structure type. For EuSmCuSe3, a = 10.75704 (15) Å, b = 4.11120 (5) Å, c = 13.37778 (22) Å. In the series of EuLnCuSe3 compounds, the optical band gap increases 1.58 eV (Nd), 1.58 eV (Sm), 1.72 eV (Gd), 1.79 eV (Er), the microhardness of the 205 (Nd), 210 (Sm), 225 (Gd) 235 ± 4 HV (Er) phases increases, and the thermal stability of the phases increases significantly. According to the measurement data of differential scanning calorimetry, the EuNdCuSe3 decomposes, according to the solid-phase reaction T = 1296 K, ΔH = 8.2 ± 0.8 kJ/mol. EuSmCuSe3 melts incongruently T = 1449 K, ΔH = 18.8 ± 1.9 kJ/mol. For the EuGdCuSe3, two (Tα↔β = 1494 K, ΔHα↔β = 14.8 kJ/mol, Tβ↔γ = 1530 K, ΔHβ↔γ = 4.8 kJ/mol) and for EuErCuSe3 three polymorphic transitions (Tα↔β = 1561 K, ΔHα↔β = 30.3 kJ/mol, Tβ↔γ = 1579 K, ΔHβ↔γ = 4.4 kJ/mol, and Tγ↔δ = 1600 K, ΔHγ↔δ = 10.1 kJ/mol). The compounds melt incongruently at the temperature of 1588 K, ΔHmelt = 17.9 ± 1.8 kJ/mol and 1664 K, ΔHmelt = 25.6 ± 2.5 kJ/mol, respectively. Incongruent melting of the phases proceeds with the formation of a solid solution of EuSe and a liquid phase.

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Держатели документа:
Univ Tyumen, Inst Chem, Tyumen 625003, Russia.
RAS, Inst Semicond Phys, Lab Opt Mat & Struct, SB, Novosibirsk 630090, Russia.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.
Novosibirsk State Tech Univ, Dept Ind Machinery Design, Novosibirsk 630073, Russia.
RAS, KSC, Fed Res Ctr, Kirensky Inst Phys,SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660036, Russia.
Ind Univ Tyumen, Dept Gen & Special Chem, Tyumen 625000, Russia.
RAS, Boreskov Inst Catalysis, SB, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Lab Mol Design & Ecol Safe Technol, Novosibirsk 630090, Russia.
RAS, Inst Solid State Chem, UB, Ekaterinburg 620990, Russia.

Доп.точки доступа:
Andreev, O. V.; Atuchin, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Denisenko, Y. G.; Zakharov, B. A.; Tyutyunnik, A. P.; Habibullayev, N. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ulybin, D. A.; Shpindyuk, D. D.; Ministry of Science and Higher Education of the Russian Ferderation [AAAA-A21-121011390011-4, AAAA-A19-119031890025-9]; Government of the Tyumen Region [2. 89-don]
}
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    Structural and magnetic alteration of Cu2GaBO5 forced by Mn3+ doping / E. Moshkina, E. Eremin, D. Velikanov [et al.] // J. Alloy. Compd. - 2022. - Vol. 902. - Ст. 163822, DOI 10.1016/j.jallcom.2022.163822. - Cited References: 43. - The study was supported by the Russian Science Foundation (Grant No. 21-72-00130) . The specific heat measurements were supported by the subsidy allocated to Kazan Federal University for the state assignment in the sphere of scientific activities (Project No.Journal of Alloys and Compounds 902 (2022) 163822 0671-2020-0 050) . The magnetic measurements, powder X-ray and EDX data were obtained using the analytical equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS". The X-ray single-crystal experiment was done using the equipment of the Research and Education Centre "Molecular Design and Environmentally Safe Technologies" at NSU. The authors acknowl-edge Prof. Rushana Eremina and Dr. Tatyana Gavrilova for the valu-able discussion of the obtained results . - ISSN 0925-8388. - ISSN 1873-4669
   Перевод заглавия: Структурная и магнитная перестройка Cu2GaBO5, вызванная допированием Mn3+

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical
Рубрики:
CRYSTAL-STRUCTURE
SUSCEPTIBILITY
Кл.слова (ненормированные):
Ludwigites -- Flux growth -- Magnetic susceptibility -- Spin glass state
Аннотация: To study the gradual change of the structure and the magnetic state of the ludwigite Cu2GaBO5 upon Mn3+ doping, single crystals of Cu2Ga1−xMnxBO5 (x = 0.55, 0.7, 0.8) with the size up to 3 × 3 × 10 mm3 were grown using the flux technique. The phase homogeneity and crystal structure of the obtained compounds were investigated by the powder and single crystal X-ray diffraction. All the samples possessed the monoclinic-distorted ludwigite structure with the P21/c space group. The study of the actual Cu/Ga/Mn composition by the EDX (energy-dispersive X-ray spectroscopy) technique revealed the lower Mn content in all the samples and the refined formulas were Cu2Ga0.47Mn0.53BO5, Cu1.92Ga0.5Mn0.58BO5 and Cu2Ga0.32Mn0.68BO5, respectively. Despite the high manganese content, the concentration transition (from Cu2GaBO5 to Cu2MnBO5) and change of the monoclinic angle did not occur, but strong Me-O octahedra distortions exceeding those both in the parent ludwigites Cu2GaBO5 and Cu2MnBO5 were found. The study of the thermodynamic and magnetic properties revealed the low-temperature magnetic phase transition inherited from the parent Cu2GaBO5 in all the samples. However, the nature and ordering type for the compounds with different Mn content were different: there was a complex transformation of the magnetic state from the partially ordered AFM (antiferromagnetically) in Cu2Ga0.47Mn0.53BO5, through the spin glass state, to the combined spin glass/ordered state in Cu2Ga0.32Mn0.68BO5 with the appearance of magnetic anisotropy. The evident dependence of Tc (phase transition temperature) on the magnetic field was found as well as its decrease at the nonzero magnetic field in the samples with x = 0.53 and 0.68.

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Держатели документа:
Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Novosibirsk State Univ, Novosibirsk 630090, Russia.
Inst Geol & Mineral, Novosibirsk 630090, Russia.
Kazan Fed Univ, Inst Phys, Kazan 420008, Russia.
Russian Acad Sci, Fed Res Ctr, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Eremin, E. V.; Еремин, Евгений Владимирович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bovina, A. F.; Бовина, Ася Федоровна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Seryotkin, Y.; Cherosov, M.; Batulin, R.; Nemtsev, I. V.; Немцев, Иван Васильевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Russian Science FoundationRussian Science Foundation (RSF) [21-72-00130]; Kazan Federal University [0671-2020-0 050]
}
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Состояние спинового стекла в SmFeTi2O7 / Г. А. Петраковский [и др.] // Физика твердого тела. - 2011. - Т. 53, № 9. - С. 1757-1760 . - ISSN 0367-3294

ГРНТИ

29.19

Рубрики:

Аннотация: Методом твердофазной реакции синтезировано соединение SmFeTi2O7. С целью определения магнитного состояния проведены рентгеноструктурные, мессбауэровские, калориметрические и магнитные измерения. В SmFeTi2O7 обнаружено состояние спинового стекла с температурой замерзания Tf=7 K.

РИНЦ
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН, Красноярск, Россия
Сибирский федеральный университет, Красноярск, Россия

Доп.точки доступа:
Петраковский, Герман Антонович; Petrakovskii, G. A.; Дрокина, Тамара Васильевна; Drokina, T. V.; Шадрина, Александра Леонидовна; Shadrina A.L.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Баюков, Олег Артемьевич; Bayukov, O. A.; Молокеев, Максим Сергеевич; Molokeev, M. S.; Карташев, Андрей Васильевич; Kartashev, A. V.; Степанов, Геннадий Николаевич
}
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10.

Влияние примесных ионов кобальта на магнитные и электрические свойства кристаллов моносилицида железа / Г. С. Патрин, В. В. Белецкий, Д. А. Великанов [и др.] // Журнал экспериментальной и теоретической физики. - 2011. - Т. 139, № 2. - С. 351-358 . - ISSN 0044-4510

ГРНТИ

29.19

Рубрики:

Аннотация: Представлены результаты экспериментальных исследований кристаллов Fe1-хCoхSi в примесном пределе. Содержание примеси было х = 0.001, 0.005 и 0.01. Проведены температурные и полевые изучения магнитной восприимчивости. Из экспериментальных данных следует, что введение примесей кобальта ведет к изменению энергетической структуры, что наиболее ярко проявляется в изменении электрических свойств. Выполнены температурные, полевые и концентрационные измерения электросопротивления. Полученные результаты интерпретируются в рамках модели Кондо.

РИНЦ
Держатели документа:
Институт инженерной физики и радиоэлектроники Сибирского федерального университета
Институт физики им. Л. В. Киренского Сибирского отделения Российской академии наук

Доп.точки доступа:
Патрин, Геннадий Семёнович; Patrin, G. S.; Белецкий, В. В.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Волков, Никита Валентинович; Volkov, N. V.; Юркин, Глеб Юрьевич; Yurkin, G. Yu.
}
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11.

Spin-glass state in SmFeTi2C7 / G. A. Petrakovskii, T. V. Drokina, A. L. Shadrina [et al.] // Moscow Int. Symp. on Magnet. (MISM-2011) : Book of abstracts. - 2011. - Ст. 22PO-J-10 . - P. 176-177. - Библиогр.: 2

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Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Drokina, T. V.; Дрокина, Тамара Васильевна; Shadrina, A. L.; Шадрина, Александра Леонидовна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
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12.

Magnetic properties and order-disoder transition in CoPt nanoparticles / S. V. Komogortsev, N. A. Chizhik, E. Yu. Filatov [et al.] // Moscow Int. Symp. on Magnet. (MISM-2011) : Book of abstracts. - 2011. - Ст. 23PO-I-26. - P. 405. - Библиогр.: 2. - The work has been partially supported by RFBR Grant 11-03-00168-а, Government of the Novosibirsk region grant for young scientists and engineers, Federal Program “Development of the Scientific Potential of Higher Education” (project no. RNP. 2.1.1/11470), Federal Target Program “Research and Research-Pedagogical Personnel of Innovation Russia for 2009-2013”.

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Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Chizhik, N. A.; Чижик Н. А.; Filatov, E. Yu.; Филатов Е. Ю.; Korenev, S. V.; Коренев С.В.; Shubin, Yu. V.; Шубин Ю.В.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Yurkin, G. Yu.; Юркин, Глеб Юрьевич; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
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13.

Теплоемкость и теплопроводность монокристаллов FexMn1-xS / Г. М. Абрамова [и др.] // Физика твердого тела. - 2011. - Т. 53, № 1. - С. 75-78 . - ISSN 0367-3294

ГРНТИ

29.19

Аннотация: Представлены результаты исследования тепловых свойств и теплопроводности монокристаллов однородных твердых растворов FexMn1-xS с кубической NaCl структурой, полученных при катионном замещении двухвалентных ионов марганца в моносульфиде марганца. Установлены аномалии теплоемкости и теплопроводности в области магнитного перехода. Катионное замещение сопровождается ростом температуры фазового перехода.

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Держатели документа:
Институт неорганической химии СО РАН, Новосибирск, Россия
Институт физики им. Л.В. Киренского СО РАН, Красноярск, Россия

Доп.точки доступа:
Абрамова, Галина Михайловна; Abramova, G. M.; Петраковский, Герман Антонович; Petrakovskii, G. A.; Карташев, Андрей Васильевич; Kartashev, A. V.; Волков, Никита Валентинович; Volkov, N. V.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Соколов, В. В.; Пичугин, А. Ю.
}
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14.

Transport properties of FeSi with cobalt impurities / G. Y. Yurkin [et al.] // TRENDS IN MAGNETISM. - 2011. - Vol. 168-169. - P493-496, DOI 10.4028/www.scientific.net/SSP.168-169.493 . - ISSN 1012-0394
Кл.слова (ненормированные):
iron monosilicide -- kondo effect -- magnetization -- resistivity -- spindependent scattering -- superparamagnetic cluster -- cobalt -- crystals -- electric resistance -- electron energy loss spectroscopy -- kondo effect -- magnetic field effects -- magnetic properties -- magnetization -- magnetoresistance -- scattering -- superparamagnetism -- transport properties -- cobalt -- electric conductivity -- electron scattering -- impurities -- kondo effect -- magnetism -- magnetization -- experimental investigations -- kondo models -- magnetoresistance properties -- resistivity -- si crystals -- spin dependent scattering -- superparamagnetic clusters -- crystal impurities -- crystal impurities
Аннотация: The results of experimental investigations of Fe1-xCo xSi crystals in the impurity limit are presented in this article. We made an attempt to study changes of magnetic properties and conductivity in mixed Fe1-xCoxSi crystals in the impurity limit. Magnetoresistance properties are well described in the framework of Kondo model. The presence of Co-subsystem leads to the occurrence of spin-dependent channel in electron scattering conduction.

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Держатели документа:
Kirensky Institute of Physics, SB, RAS, 660036, Krasnoyarsk, Russian Federation
Siberian Federal University, 660041, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Yurkin, G. Yu.; Юркин, Глеб Юрьевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Beletsky, V. V.
}
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15.

Магнитные свойства монокристалла Nd0.5Gd0.5Fe3(BO3)4 / А. В. Малаховский [и др.] // Физика твердого тела. - 2011. - Т. 53, № 10. - С. 1929-1934 . - ISSN 0367-3294

ГРНТИ

29.19

Рубрики:

Аннотация: Исследованы магнитные свойства монокристалла Nd0.5Gd0.5Fe3(BO3)4 в основных кристаллографических направлениях в полях до 90 kG и в интервале температур 2-300 K, а также измерена теплоемкость в интервале 2-300 K. Установлено, что ниже температуры Нееля TN=32 K вплоть до 2 K в нем реализуется легкоплоскостная антиферромагнитная структура. Обнаружены гистерезис при намагничивании кристалла в легкой плоскости в полях 1-3.5 kG и сингулярность на температурной зависимости магнитной восприимчивости в легкой плоскости при температуре 11 K в поле B1 kG. Показано, что эта сингулярность связана с появлением гистерезиса. Обсуждается происхождение магнитных свойств кристалла в области гистерезиса. Работа была поддержана грантом РФФИ N 09-02-00171-а.

РИНЦ
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН, Красноярск, Россия
Сибирский федеральный университет, Красноярск, Россия

Доп.точки доступа:
Малаховский, Александр Валентинович; Malakhovskii, A. V.; Еремин, Евгений Владимирович; Eremin, E. V.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Карташев, Андрей Васильевич; Kartashev, A. V.; Васильев, Александр Дмитриевич; Vasiliev, A. D.; Гудим, Ирина Анатольевна; Gudim, I. A.
}
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16.

Кристаллическая структура и магнитная анизотропия в людвигите Co2FeO2BO3 / Н. Б. Иванова [и др.] // Журнал экспериментальной и теоретической физики. - 2011. - Т. 140, № 6. - С. 1160-1172 . - ISSN 0044-4510
Рубрики:

Аннотация: Получены монокристаллы оксиборатов со структурой людвигита Co3FeO2BO3 и Co2FeO2BO3. Проведено детальное исследование кристаллической структуры и магнитных свойств. В замещенном людвигите Co2FeO2BO3 обнаружено двухэтапное магнитное упорядочение при температурах, характерных для Fe3O2BO3 (TN1 ? 110 К, TN2 = 70 К), а не для Co3FeO2BO3 (TN = 42 К). Данный эффект объяснен с позиций предпочтительного характера заполнения железом неэквивалентных кристаллографических позиций, как выявлено в ходе рентгеноструктурных исследований. Оба материала демонстрируют ярко выраженную одноосную магнитную анизотропию. Кристаллографическое направление Ь является легким направлением намагничивания. При замещении железом кобальтовый людвигит приобретает чрезвычайную магнитную жесткость.

РИНЦ
Держатели документа:
Institute de Ciencia de Materiales de Aragon, CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada
Институт физики им. Л. В. Киренского Сибирского отделения Российской академии наук
Красноярский государственный аграрный университет
Сибирская аэрокосмическая академия
Сибирский федеральный университет

Доп.точки доступа:
Иванова, Наталья Борисовна; Ivanova, N.B.; Патрин, Геннадий Семёнович; Patrin, G. S.; Казак, Наталья Валерьевна; Kazak, N. V.; Князев, Юрий Владимирович; Knyazev, Yu. V.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Безматерных, Леонард Николаевич; Bezmaternykh, L. N.; Овчинников, Сергей Геннадьевич; Ovchinnikov, S. G.; Васильев, Александр Дмитриевич; Vasiliev, A. D.; Платунов, Михаил Сергеевич; Platunov, M. S.; Бартоломе, X.
}
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17.

Magnetic transitions in the Co2.5Ge0.5BO5 / N. A. Belskaya, N. V. Kazak, A. D. Vasilev [et al.] // International conference "Functional materials" : book of abstracts / ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2021. - P. 61-62. - Библиогр.: 7 назв. - The reported study was funded by Russian Foundation for Basic Research (RFBR), project number 20-02-00559

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Доп.точки доступа:
Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Ovchinnikov, S. G. \org. com.\; Овчинников, Сергей Геннадьевич; Belskaya, N. A.; Kazak, N. V.; Казак, Наталья Валерьевна; Vasilev, A. D.; Васильев, Александр Дмитриевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gavrilkin, S. Y.; Ovchinnikov, S. G.; "Functional materials", International conference(2021 ; Oct. 4-8 ; Alushta, Russia); Крымский федеральный университет имени В.И. Вернадского
}
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18.

Co5/3Nb1/3BO4: A new cobalt oxyborate with a complex magnetic structure / N. V. Kazak, N. A. Belskaya, E. M. Moshkina [et al.] // J. Magn. Magn. Mater. - 2021. - Vol. 534. - Ст. 168056, DOI 10.1016/j.jmmm.2021.168056. - Cited References: 50. - The authors acknowledge M. Molokeev for the orientating the single crystal for magnetic measurements. The X-ray diffraction and specific heat measurements were carried out in the Common Access Facility Centres of SB RAS (Krasnoyarsk, Russia) and P.N. Lebedev Physical Institute of RAS (Moscow, Russia). This work has been financed by the Russian Foundation for Basic Research (project no. 20-02-00559). We acknowledge financial support from the Spanish MINECO DWARFS project MAT2017-83468-R and Gobierno de Aragón (Group, E12-20R) . - ISSN 0304-8853
Кл.слова (ненормированные):
Warwickites -- Ferrimagnet
Аннотация: Needle-shape single crystals of Co5/3Nb1/3BO4 warwickite were grown using the flux technique. X-ray diffraction measurements have revealed an orthorhombic structure (Sp. Gr. Pbnm) where the octahedral M1 site is occupied by a mixture of Co2+/Nb5+ ions and the M2 site is exclusively filled by Co2+ ions. Using dc magnetization measurements it was established that the new material undergoes two magnetic transitions: an antiferromagnetic transition at TN1 = 27 K and a ferrimagnetic one at TN2 = 14 K, below which a hysteresis cycle opens. Both magnetic transitions are marked by anomalies in the specific heat. High magnetic anisotropy with c-axis as a hard magnetization direction was detected.

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Держатели документа:
Kirensky Institute of Physics, FRC SB RAS, Krasnoyarsk, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada, Zaragoza, 50009, Spain
Servicio de Medidas Fisicas, Universidad de Zaragoza, Zaragoza, Spain
P.N. Lebedev, Physical Institute of RAS, Moscow, 119991, Russian Federation

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Belskaya, N. A.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Bartolome, J.; Arauzo, A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gavrilkin, S. Y.; Gorev, M. V.; Горев, Михаил Васильевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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19.

Regularities of the property changes in the compounds EuLnCuS3 (Ln = La-Lu) / A. V. Ruseikina, V. A. Chernyshev, D. A. Velikanov [et al.] // J. Alloys Compd. - 2021. - Vol. 874. - Ст. 159968, DOI 10.1016/j.jallcom.2021.159968. - Cited References: 102. - The work was supported by the Ministry of Science and Higher Education of the Russian Federation under Project No. FEUZ-2020-0054 ; by the " YMNIK " program research project No. 14977GY/2019; by the Ministry of Science and Higher Education of the Russian Federation under project RFMEFI59420X0019 . - ISSN 0925-8388
Кл.слова (ненормированные):
Inorganic materials -- Ab initio calculations -- Thermochemistry -- Magnetic measurements -- Microhardness -- Lattice dynamics
Аннотация: This work contains the results of complex experimental research of the compounds EuLnCuS3 (Ln = La-Lu) enhanced by the DFT calculations. It is aimed at the data replenishment with particular attention to the revelation of regularities in the property changes, in order to extend the potential applicability of the materials of the selected chemical class. The ab initio calculations of the fundamental vibrational modes of the crystal structures were in good agreement with experimental results. The wavenumbers and types of the modes were determined, and the degree of the ion participation in the modes was also estimated. The elastic properties of the compounds were calculated. The compounds were found out to be IR-transparent in the range of 4000–400 cm–1. The estimated microhardness of the compounds is in the range of 2.68–3.60 GPa. According to the DSC data, the reversible polymorphous transitions were manifested in the compounds EuLnCuS3 (Ln = Sm, Gd-Lu): for EuSmCuS3 Tα↔β = 1437 K, ΔНα↔β = 7.0 kJ·mol-1, Tβ↔γ = 1453 K, ΔНβ↔γ = 2.6 kJ·mol-1; for EuTbCuS3 Tα↔β = 1478 K, ΔНα↔β = 1.6 kJ·mol-1, Tβ↔γ = 1516 K, ΔНβ↔γ = 0.9 kJ·mol-1, Tγ↔δ = 1548 K, ΔНγ↔δ = 1.6 kJ·mol-1; for EuTmCuS3 Tα↔β = 1543 K, Tβ↔γ = 1593 K, Tγ↔δ = 1620 K; for EuYbCuS3 Tα↔β = 1513 K, Tβ↔γ = 1564 K, Tγ↔δ = 1594 K; for EuLuCuS3 Tα↔β = 1549 K, Tβ↔γ = 1601 K, Tγ↔δ = 1628 K. In the EuLnCuS3 series, the transition into either ferro- or ferrimagnetic states occurred in the narrow temperature range from 2 to 5 K. The tetrad effect in the changes of incongruent melting temperature and microhardness conditioned on rLn3+ as well as influencing of phenomenon of crystallochemical contraction were observed. For delimiting between space groups Cmcm and Pnma in the compounds ALnCuS3, the use of the tolerance factor t’ = IR(A)·IR(C) + a×IR(B)2 was verified.

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Держатели документа:
Institute of Chemistry, University of Tyumen, Tyumen, 625003, Russian Federation
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660079, Russian Federation
Institute of Physics and Technology, University of Tyumen, Tyumen, 625003, Russian Federation
Engineering Centre of Composite Materials Based on Wolfram Compounds and Rare-earth Elements, University of Tyumen, Tyumen, 625003, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660049, Russian Federation
University of Tyumen, Tyumen, 625003, Russian Federation

Доп.точки доступа:
Ruseikina, A. V.; Chernyshev, V. A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Grigoriev, M. V.; Andreev, O. V.; Garmonov, A. A.; Matigorov, A. V.; Melnikova, L. V.; Kislitsyn, A. A.; Volkova, S. S.
}
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20.

Uncompensated magnetic moment and surface and size effects in few-nanometer antiferromagnetic NiO particles / D. A. Balaev, A. A. Krasikov, S. I. Popkov [et al.] // J. Magn. Magn. Mater. - 2021. - Vol. 539. - Ст. 168343, DOI 10.1016/j.jmmm.2021.168343. - Cited References: 98. - The TEM study was carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences . - ISSN 0304-8853
Кл.слова (ненормированные):
Antiferromagnetic NiO nanoparticles -- Uncompensated magnetic moment -- Superparamagnetism -- Surface magnetic anisotropy
Аннотация: The analysis of the M(H) magnetization curves of antiferromagnetic nanoparticles yields information about magnetic subsystems formed in these objects, which are characterized by a large fraction of surface atoms. However, in the conventionally investigated experimental magnetic field range of up to 60–90 kOe, this analysis often faces the ambiguity of distinguishing the Langevin function-simulated contribution of uncompensated magnetic moments μun of particles against the background of a linear-in-field dependence (the antiferromagnetic susceptibility and other contributions). Here, this problem has been solved using a pulsed technique, which makes it possible to significantly broaden the range of external fields in which the μun contribution approaches the saturation. Nanoparticles of a typical NiO antiferromagnet with an average size of ~ 4.5 nm have been investigated. Based on the thorough examination of the M(H) magnetization curves measured in pulsed fields of up to 250 kOe, a model of the magnetic state of NiO nanoparticles of such a small size has been proposed. The average moment is ~130 μB (μB is the Bohr magneton) per particle, which corresponds to 60–70 decompensated spins of nickel atoms localized, according to the Néel hypothesis (μun ~ 3/2), both on the surface and in the bulk of a particle. A part of the surface spins unrelated to the antiferromagnetic core form another subsystem, which behaves as free paramagnetic atoms. Along with the antiferromagnetic core, an additional linear-in-field contribution has been detected, which is apparently related to superantiferromagnetism, i.e., the size effect inherent to small antiferromagnetic particles.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center”, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Krasikov, A. A.; Красиков, Александр Александрович; Popkov, S. I.; Попков, Сергей Иванович; Semenov, S. V.; Семёнов, Сергей Васильевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Kirillov, V. L.; Martyanov, O. N.
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