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Korshunov, M. M.
Superconducting order parameter structure in the nematic phase of iron-based materials / M. M. Korshunov, Yu. N. Togushova // JETP Lett. - 2024. - Vol. 119, Is. 4. - P. 310-315, DOI 10.1134/S0021364024600046. - Cited References: 28 . - ISSN 0021-3640. - ISSN 1090-6487
Аннотация: We consider the effect of the nematic order on the formation of the superconducting state in iron pnictides and chalcogenides. Nematic order with the B2g symmetry is modelled as the d-type Pomeranchuk instability and treated within the mean-field approach. Calculated nematic order parameter depends on the nematic interaction coefficient and abruptly changes with the coefficient’s increase. The superconducting solution is obtained within the spin-fluctuation pairing theory. We show that the leading solution in the nematic phase has a sπ± structure. From the critical temperature Tc estimations, we conclude that the nematic superconducting state of the sπ± type is more favorable than the usual s± and dx2-y2 type states appearing in the absence of the nematicity.

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Публикация на русском языке Коршунов, Максим Михайлович. Структура сверхпроводящего параметра порядка в нематической фазе соединений железа [Текст] / М. М. Коршунов, Ю. Н. Тогушова. - 6 с. // Письма в ЖЭТФ. - 2024. - Т. 119 Вып. 4. - С. 302-307

Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia

Доп.точки доступа:
Togushova, Yu. N.; Коршунов, Максим Михайлович
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Magnetization processes in two-dimensional arrays of iron nanowires / D. L. Zagorskiy, S. V. Semenov, S. V. Komogortsev [et al.] // J. Magn. Magn. Mater. - 2024. - Vol. 595. - Ст. 171573, DOI 10.1016/j.jmmm.2023.171573. - Cited References: 48. - This work was supported by Russian Scientific Foundation (RSF) Grant 22-22-00983 . - ISSN 0304-8853. - ISSN 1873-4766
Кл.слова (ненормированные):
Nanowires -- Magnetic measurements -- Micromagnetic modeling
Аннотация: Arrays of iron nanowires (NWs) obtained by template-assisted electrodeposition constitute a promising composite material characterized by a combination of high magnetization in the filler and perpendicular magnetic anisotropy. The properties of these composites arise from the interplay between the behavior of individual NWs and their magnetostatic interactions. In this study, we investigated NW arrays with identical wire diameters but varying spatial arrangements. Major hysteresis loops were studied under various field directions relative to the NW axis. Key parameters such as the slope of the magnetization curve, saturation magnetization, and coercive force were quantified. Additionally, FORC (First Order Reversal Curve) measurements were conducted with the field oriented longitudinally with respect to the NW, offering insights into the inhomogeneity of the demagnetizing field influenced by the NW array's configuration. In the sample with the highest NW density, we observed isotropic behavior of the effective demagnetizing field, and we proposed an explanation for this phenomenon using the effective media approach. Micromagnetic simulations revealed that the magnetic behavior of individual NWs with a 100 nm diameter can be described as an interchange between volumes characterized by vortex and uniform magnetization patterns. Calculations of the demagnetizing field using the effective medium model demonstrated excellent agreement with experimental data across arrays featuring different NW densities. Remarkably, the quantitative consistency of coercive field values obtained from micromagnetic simulations and experimental measurements in the range of angles from 0° to 45° for the studied samples underscores the structural homogeneity of the obtained NWs.

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Держатели документа:
FSRC “Crystallography and Photonics”, Russian Academy of Sciences, Moscow, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
National University of Science and Technology MISiS, Moscow 119049, Russia
Immanuel Kant Baltic Federal University, Kaliningrad 236001, Russia

Доп.точки доступа:
Zagorskiy, D.L.; Semenov, S. V.; Семёнов, Сергей Васильевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Balaev, D. A.; Балаев, Дмитрий Александрович; Doludenko, I.M.; Panina, L.V.
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Fenton reaction-driven pro-oxidant synergy of ascorbic acid and iron oxide nanoparticles in MIL-88B(Fe) / L. Bondarenko, R. Baimuratova, A. Dzeranov [et al.] // New J. Chem. - 2024. - Vol. 48, Is. 22. - P. 10142-10160, DOI 10.1039/D4NJ00963K. - Cited References: 94 . - ISSN 1144-0546. - ISSN 1369-9261
Аннотация: MIL-88B, a promising Fe-based 3D porous metal–organic framework (MOF) catalyst for the Fenton reaction, requires modifications to enhance its pro-oxidant activity and enable magnetic control of the sample. This study reports the successful modification of MIL-88B with iron oxide (Fe3O4) and ascorbic acid (AA). The characterization of the crystal structure and morphology of the Fe3O4–AA MOF sample using X-ray diffraction, Raman and Mossbauer spectroscopy, and scanning electron microscopy revealed that AA facilitated the formation of magnetite with a composition approaching a stoichiometry of Fe2.96O4 while preserving the MOF structure. Specifically, in the presence of hydrogen peroxide (H2O2), Fe3O4–AA–MOF exhibited a 3-fold increase in the Fenton reaction rate for methylene blue degradation compared to the conventional homogeneous system at pH 4.5. Furthermore, Fe3O4–AA–MOF retained the antibacterial properties of AA, as evidenced by its ability to increase reactive oxygen species in luminescent marine bacterium Photobacterium phosphoreum at low concentrations while exhibiting moderate cytotoxicity. The enhanced pro-oxidant activity of the Fe3O4–AA–MOF/H2O2 system is attributed to an AA-promoted surface Fe2+/Fe3+ cycle. A possible mechanism for this system is proposed.

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Держатели документа:
Moscow Aviation Institute (National Research University), Moscow, Russia
Sklifosovsky Research Institute for Emergency Medicine, Moscow, Russia
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka, Moscow region, Russia
Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia
Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 660036 Krasnoyarsk, Russia
Siberian Federal University, 660041 Krasnoyarsk, Russia
Udmurt Federal Research Center of UB RAS, Izhevsk, Russia

Доп.точки доступа:
Bondarenko, L.; Baimuratova, R.; Dzeranov, A.; Pankratov, D.; Kicheeva, A.; Sushko, E.; Сушко, Екатерина Сергеевна; Kudryasheva, N.; Valeev, R.; Tropskaya, N.; Dzhardimalieva, G.; Kydralieva, K.
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Study of magnetic iron oxide nanoparticles coated with silicon oxide by ferromagnetic method / I. G. Vazhenina, S. V. Stolyar, A. V. Tyumentsev [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 6. - P. 884-888, DOI 10.21883/PSS.2023.06.56095.01H. - Cited References: 20. - The study was supported by grant No. 22-14-20020 provided by the Russian Science Foundation, Krasnoyarsk Regional Science Foundation . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
iron oxide nanoparticles -- ferromagnetic resonance -- superparamagnetism -- blocking temperature
Аннотация: agnetic nanoparticles of magnetite with a size of ~8 nm synthesized with a different type of coating were studied by ferromagnetic resonance in the temperature range from 7 to 300 K. The features of the experimental temperature dependences of the parameters of the ferromagnetic resonance curve (the magnitude of the resonant field, line width and intensity) and their approximation allowed us to estimate the values of characteristic temperatures. Firstly, the value of the Vervey temperature and the dependence of its value on the type of coating were determined. Secondly, the temperature of transition of nanoparticles to the superparamagnetic state (blocking temperature) and the temperature range within which the magnetic structure of the outer shell of the magnetic nanoparticle is in the spin glass state are established.

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Публикация на русском языке Исследование магнитных наночастиц оксида железа, покрытых оксидом кремния, методом ферромагнитного резонанса [Текст] / И. Г. Важенина, С. В. Столяр, А. В. Тюменцева [и др.]. - 5 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 6. - С. 923-927

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia
Krasnoyarsk State Medical University named after Prof. V.F. Voyno-Yasenetsky, Ministry of Health of Russia, Krasnoyarsk, Russia

Доп.точки доступа:
Vazhenina, I. G.; Важенина, Ирина Георгиевна; Stolyar, S. V.; Tyumentsev, A. V.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Pyankov, V. F.; Nikolaeva, E. D.; Nanophysics and Nanoelectronics, International Symposium(27 ; 13-16 March 2023 ; Nizhny Novgorod, Russia)
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    Магнитодипольное взаимодействие в двумерном ансамбле нанонитей железа / С. В. Семенов, С. В. Комогорцев, А. Д. Балаев, Д. Л. Загорский // 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. - С. 30, DOI 10.26516/978-5-9624-2178-0.2023.1-207 . - ISBN 978-5-962402178-0
   Перевод заглавия: Magneto-dipole interaction in 2D iron nanowires array

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Держатели документа:
Институт физики им. Л. В. Киренского СО РАН
ФНИЦ "Кристаллография и фотоника" РАН

Доп.точки доступа:
Аплеснин, Сергей Степанович \чл. прогр. ком.\; Aplesnin, S. S.; Балаев, Дмитрий Александрович \чл. прогр. ком.\; Balaev, D. A.; Овчинников, Сергей Геннадьевич \чл. прогр. ком.\; Ovchinnikov, S. G.; Исхаков, Рауф Садыкович \чл. орг. ком.\; Iskhakov, R. S.; Семенов, Сергей Васильевич; Semenov, S. V.; Комогорцев, Сергей Викторович; Komogortsev, S. V.; Балаев, Александр Дмитриевич; Balaev, A.D.; Загорский, Д. Л.; 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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The manifestation of surface and size effects in the magnetic properties of ε-Fe2O3 nanoparticles. (Brief overview) / D. A. Balaev, A. A. Dubrovskii, Yu. V. Knyazev [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 6. - P. 938-946, DOI 10.21883/PSS.2023.06.56105.12H. - Cited References: 66 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
iron oxide ε-Fe2O3 -- nanoparticles -- size effect -- surface magnetic anisotropy
Аннотация: Polymorphic modification of iron oxide, known as ε-Fe2O3, exists only in the form of nanoparticles with characteristic sizes up to several tens of nanometers. Particles of these sizes exhibit a large coercive force, about 20 kOe at room temperature. In the temperature range of 80–150 K, a magnetic transition occurs in ε-Fe2O3, accompanied by a sharp decrease in the coercive force. At the same time, there are significant differences in the magnetic behavior of "large" (~20 nm) particles and ultra-small particles (up to 6 nm). A number of experimental facts indicate the manifestation of size effects that lead to a change in the magnetic structure in particles of these sizes. In addition, a surface effect is also manifested for such particles - a significant contribution to the magnetic behavior is governed by surface magnetic anisotropy. In this paper, a brief review of the manifestation of these size and surface effects in the magnetic properties of ε-Fe2O3 nanoparticles is carried out.

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Публикация на русском языке Проявление поверхностных и размерных эффектов в магнитных свойствах наночастиц ε-Fe2O3. (Краткий обзор) [Текст] / Д. А. Балаев, А. А. Дубровский, Ю. В. Князев [и др.]. - 10 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 6. - С. 979-988

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Институт катализа им. Г.К. Борескова СО РАН, Новосибирск, Россия

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Semenov, S. V.; Семенов, Сергей Васильевич; Kirillov, V. L.; Martianov, O. N.; Nanophysics and Nanoelectronics, International Symposium(27 ; 13-16 March 2023 ; Nizhny Novgorod, Russia)
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    Facile synthesis and selected characteristics of two-dimensional material composed of iron sulfide and magnesium-based hydroxide layers (tochilinite) / Yu. L. Mikhlin, R. V. Borisov, M. N. Likhatski [et al.] // New J. Chem. - 2023. - Vol. 47, Is. 25. - P. 11869-11881, DOI 10.1039/D3NJ00758H. - Cited References: 97. - This research was financially supported by the Russian Science Foundation, project 22-13-00321 . - ISSN 1144-0546. - ISSN 1369-9261
   Перевод заглавия: Синтез и некоторые характеристики двумерного материала, состоящего из слоев сульфида железа и гидроксида на основе магния (точилинит)
Аннотация: We report here a simple hydrothermal synthesis of 100–200 nm flakes of tochilinite (Fe1−xS)·n(Mg,Fe)(OH)2 constructed by interchanging atomic sulfide and hydroxide sheets as a representative of a new platform of multifunctional two-dimensional materials. The reliable formation of tochilinites was ensured by an excess of sodium sulfide, with the assembly of the metal sulfide and hydroxide sheets driven by their opposite electric charges. X-ray photoelectron spectroscopy found that the hydroxide layers involved Fe3+ cations from 10 to 40% of total iron tuned by addition of Al and Li entering the layers; the Fe1−xS sheets comprised comparable amounts of high-spin Fe3+ and Fe2+ centers, and minor S–S bonding. The room-temperature Mössbauer spectra fitted with several doublets (chemical shift of 0.35–0.4 mm s−1 and varying quadrupole splitting) transformed to three six-line patterns (hyperfine fields of ∼290, 350 and 480 kOe) due to magnetic ordering at 4.2 K, albeit the paramagnetic behavior observed in SQUID experiments. A series of UV-vis absorption maxima were explained in terms of both the high-index all-dielectric Mie resonance, in line with the permittivity measurement data, and the ligand-metal charge transfer resembling that in Fe–S clusters in proteins. Prospective properties and applications of the materials are discussed.

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Держатели документа:
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk, Russia
Kirensky Institute of Physics, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, Russia
Siberian Federal University, Svobodny av. 79, Krasnoyarsk, Russia

Доп.точки доступа:
Mikhlin, Yuri L.; Borisov, Roman V.; Likhatski, Maxim N.; Bayukov, O. A.; Баюков, Олег Артемьевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Zharkov, S. M.; Жарков, Сергей Михайлович; Vorobyev, Sergey A.; Tomashevich, Yevgeny V.; Ivaneeva, Anastasiya D.; Karacharov, Anton A.; Karpov, Denis V.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Smolyakov, D. A.; Смоляков, Дмитрий Александрович; Tarasov, A. S.; Тарасов, Антон Сергеевич
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Anomalies in the magnetic properties of bismuth-substituted diluted yttrium iron garnet / S. S. Aplesnin, F. V. Zelenov, S. V. Semenov, O. A. Bayukov // J. Magn. Magn. Mater. - 2023. - Vol. 582. - Ст. 171030, DOI 10.1016/j.jmmm.2023.171030. - Cited References: 61. - The authors are grateful to T. N. Tarasenko for providing samples for magnetic measurements . - ISSN 0304-8853. - ISSN 1873-4766
Кл.слова (ненормированные):
Magnetic properties -- Compensation temperature -- Mossbauer spectroscopy
Аннотация: The magnetic properties and Mossbauer spectra of the Y1.8Bi1.2Fe3.5Ga1.5O12 compound were investigated. A linear temperature dependence of the saturation magnetization, hysteresis, and stability of the coercive field in the magnetically ordered state were found. Using the Mossbauer measurements, the distribution of iron ions over octahedral and tetrahedral sites and the concentration of paramagnetic iron ions were determined. Two critical temperatures – the sublattice magnetization compensation temperature and the ferrimagnet–paramagnet transition temperature – were established. The disappear of the phonon mode in the vicinity of the magnetic transition was observed. The experimental data have been interpreted in terms of the spin–lattice interaction model.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk 660036, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsky Rabochy Av., 31, Krasnoyarsk 660014, Krasnoyarsk, Russia
Siberian Federal University, Svobodny pr. 79, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Zelenov, F. V.; Semenov, S. V.; Семёнов, Сергей Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич
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Characteristics of nanocomplexes with iron Fe3+ in Glass Ionomer Cement powder by ESR method / V. V. Shapovalov, V. A. Shapovalov, Yu. A. Sluzhbin [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 2. - P. 296-298, DOI 10.21883/PSS.2023.02.55415.489. - Cited References: 13 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
Electronic Spin Resonance (ESR) -- nanocrystals -- crystal field potential -- intensity of ESR lines
Аннотация: The study is part of nanomedical biotechnology and is carried out by probing these systems using the Electronic Spin Resonance (ESR) method. The paper investigates Glass Ionomer Cement powder widely used in dental practice Glass Ionomer Cement C-Plus Triplekit-TM. To assess the quality of Glass Ionomer Cement and use ESR radiospectroscopy in the range from low (T=4.2 K) to room (T=300 K) temperatures. A new characteristic of compounds with nanocomplexes of magnetic iron ions Fe3+ is applied.

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Публикация на русском языке Характеристика нанокомплексов c железом Fe3+ в порошке стеклоиномерного цемента методом ЭПР [Текст] / V. V. Shapovalov, В. А. Шаповалов, Ю. А. Службин [и др.] // Физ. тверд. тела. - 2023. - Т. 65 Вып. 2. - С. 302-304

Держатели документа:
Organization “Math for America”, New York, USA
Galkin Donetsk Institute for Physics and Enginireeng, Donetsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Shapovalov, V. V.; Shapovalov, V. A.; Sluzhbin, Yu. A.; Drokina, T. V.; Дрокина, Тамара Васильевна; Vorotynov, A. M.; Воротынов, Александр Михайлович; Valkov, V. I.
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10.

    Ivanov, D. A.
    Changes of the Fermi surface topology in the three-orbital model for iron pnictides with the spin-orbit coupling / D. A. Ivanov, Y. N. Togushova, M. M. Korshunov // J. Sib. Fed. Univ. Math. Phys. - 2023. - Vol. 16, Is. 6. - P. 795-803 ; Журн. СФУ. Матем. и физ. - Cited References: 28 . - ISSN 1997-1397. - ISSN 2313-6022
   Перевод заглавия: Изменение топологии поверхности Ферми в трехорбитальной модели пниктидов железа со спин-орбитальным взаимодействием
Кл.слова (ненормированные):
Fe-based superconductors -- spin-orbit coupling -- band structure -- Fermi surface -- сверхпроводники на основе железа -- спин-орбитальное взаимодействие -- зонная структура -- поверхность Ферми
Аннотация: Effect of the spin-orbit coupling on the band structure and the Fermi surface of the three-orbital model is studied. The inter-orbital part of the model is reformulated to fully conform with the iron lattice symmetry. Because there are two iron ions in the unit cell, we introduce the intra-and inter-ion spin-orbit coupling constants to separate the effect of the related couplings on the band structure and the Fermi surface. Both the intra-and inter-ion parts lift the degeneracy of some bands at the Γ = (0, 0) point and the splitting of bands along the (0, π) ‒ (π, π) direction of the Brillouin zone. We show that the inter-ion part of the spin-orbit coupling leads to the topological change of the Fermi surface — the splitting of two Fermi surface sheets around the M = (π, π) point.
Изучено влияние спин-орбитального взаимодействия на зонную структуру и поверхность Ферми в трехорбитальной модели. Межорбитальная часть модели изменена для полного соответствия с симметрией решетки железа. Из-за наличия двух ионов железа в элементарной ячейке мы вводим внутри- и межионную константы спин-орбитального взаимодействия для разделения эффектов соответствующих взаимодействий на зонную структуру и поверхность Ферми. И внутри, и межионная части снимают вырождение некоторых зон в точке Γ = (0, 0) и вырождение вдоль направления (0, π) − (π, π) зоны Бриллюэна. Показано, что межионная часть спин-орбитального взаимодействия приводит к изменению топологии поверхности Ферми, а именно к разделению листов поверхности Ферми вблизи точки M = (π, π).

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

Доп.точки доступа:
Togushova, Y. N.; Korshunov, M. M.; Коршунов, Максим Михайлович

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11.

Ferromagnetic silicides and germanides epitaxial films and multilayered hybrid structures: Synthesis, magnetic and transport properties / A. S. Tarasov, A. V. Lukyanenko, I. A. Yakovlev [et al.] // Bull. Russ. Acad. Sci.: Phys. - 2023. - Vol. 87, Suppl. 1. - P. S133-S146, DOI 10.1134/S1062873823704518. - Cited References: 54. - The authors thank the laboratory of Magnetic MAX Materials created under Megagrant project (agreement no. 075-15-2019-1886) for providing experimental equipment and the Collective Use Center at the Krasnoyarsk Scientific Center (Siberian Branch, Russian Academy of Sciences) for assistance. The authors also thank Professor B.A. Belyaev for FMR calculations. - Supported by the Russian Science Foundation, grant no. 23-22-10033, https://rscf.ru/project/23-22-10033/, Krasnoyarsk Regional Fund of Science . - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
iron silicide -- manganese germanide -- MBE -- FMR -- electronic transport -- spintronics
Аннотация: Planar and vertical hybrid structures, which combine ferromagnetic and semiconductor layers are essential for implementation and study of spin transport phenomena in semiconductors, which is crucial for the advancement and development of spintronics. We have developed approaches for the synthesis of Fe3 + xSi1 – x epitaxial thin films and demonstrated the spin accumulation effect in multiterminal devices based on Fe3 + xSi1 – x/Si. Fe3 + xSi1 – x/Ge/Fe3Si and Fe3 + xSi1 – x/Ge/Mn5Ge3 multilayer hybrid structures were synthesized on a Si(111) substrate, study of their structural, magnetic and transport properties were performed. The effect of synthesis conditions on the growth of epitaxial structures and on their magnetic and transport properties was discussed. The results obtained may prove valuable in the development and fabrication of spintronic devices.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center”, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 660041, Krasnoyarsk, Russia
Federal Research Center “Krasnoyarsk Scientific Center”, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Bondarev, I. A.; Бондарев, Илья Александрович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Shanidze, L. V.; Шанидзе, Лев Викторович; Smolyakov, D. A.; Смоляков, Дмитрий Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович
}
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12.

Chukalina, E. P.
Study of the magnetic properties of neodymium and samarium iron borates by the method of erbium spectroscopic probe / E. P. Chukalina, A. Jablunovskis, I. A. Gudim // Opt. Spectrosc. - 2023. - Vol. 131, Is. 8. - P. 630-636, DOI 10.1134/S0030400X23060024. - Cited References: 30. - This paper was carried out under financial support of the Russian Science Foundation (grant № 19-12-00413) . - ISSN 0030-400X. - ISSN 1562-6911
Кл.слова (ненормированные):
multiferroics -- optical spectroscopy -- crystals with rare earths -- Kramers ions
Аннотация: Iron borates NdFe3(BO3)4 and SmFe3 (BO3)4 activated with 1% erbium, with ahuntite structure (space symmetry group R32) were investigated by the method of erbium spectroscopic probe. From an analysis of the temperature dependence of the transmission spectra in the region of the 4I15/2 → 4113/2 transition in the Er3+ ion, it was found that both studied compounds order antiferromagnetically at TN ≈ 33 K into an easy-plane magnetic structure. No other phase transitions were found.

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Публикация на русском языке Чукалина Е. П. Исследование магнитных свойств ферроборатов неодима и самария методом спектроскопического эрбиевого зонда [Текст] / Е. П. Чукалина, А. Яблуновский, И. А. Гудим // Опт. и спектроскоп. - 2022. - Т. 130 Вып. 1. - С. 104-110

Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, 108840, Troitsk, Moscow, Russia
Moscow Institute of Physics and Technology (National Research University), 141701, Dolgoprudny, Moscow oblast, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Jablunovskis, A.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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13.

Giant anisotropy of magnetic properties of hydrated iron fluoridotitanate molecular single crystal / A. A. Dubrovskiy, Yu. V. Knyazev, D. A. Velikanov [et al.] // V International Baltic Conference on Magnetism. IBCM : Book of abstracts. - 2023. - P. 57. - Cited References: 4. - РНФ № 23-22-10037 ; Красноярский регион. фонд науки

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Institute of Chemistry, Far Eastern Branch of RAS

Доп.точки доступа:
Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Laptash, N. M.; Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; International Baltic Conference on Magnetism(5 ; 2023 ; Aug. 20-24 ; Svetlogorsk, Russia); Балтийский федеральный университет им. И. Канта
}
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14.

Investigation of the magnetoelectric effect and thermoelectric power of the composite of iron-substituted bismuth pyrostannate Bi2(Sn0.7Fe0.3)2O7/Bi2Fe4O9 / L. V. Udod, S. S. Aplesnin, M. N. Sitnikov, O. B. Romanova // Phys. Solid State. - 2023. - Vol. 65, Is. 8. - P. 1305-1311, DOI 10.21883/PSS.2023.08.56576.83. - Cited References: 45 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
composite -- magnetoelectric effect -- current-voltage characteristics -- hysteresis -- thermoelectric power
Аннотация: The composite compound Bi2(Sn0.7Fe0.3)2O7/Bi2Fe4O9 in the ratio 91/9% was synthesized by the solid-phase reaction method. The current-voltage characteristics were studied in the temperature range 800–400 K. The hysteresis of the current-voltage characteristics was found. The magnetoelectric interaction and thermoelectric power have been studied. The temperatures of predominance of the even and linear functions of the magnetoelectric effect are established. The sign change of the thermopower has been found.

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Публикация на русском языке Исследование магнитоэлектрического эффекта и термоэдс в композитном железозамещенном пиростаннате висмута Bi2(Sn00.7Fe0.3)2O7/Bi2Fe4O9 [Текст] / Л. В. Удод, С. С. Аплеснин, М. Н. Ситников, О. Б. Романова. - 7 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 8. - С. 1361-1367

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian State University of Science and Technology, Krasnoyarsk, Russia

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Romanova, O. B.; Романова, Оксана Борисовна
}
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15.

Magnetization curves of 2D iron nanowires array / D. L. Zagorskiy, S. V. Semenov, S. V. Komogortsev [et al.] // Book of abstacts of Samarkand International Symposium on Magnetism (SISM-2023) / int. adv. com. S. G. Ovchinnikov [et al.]. - 2023. - Ст. 2PO-L4-23. - P. 121. - РНФ № 22-22-00983 . - ISBN 978-5-00202-320-2

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Держатели документа:
Kirensky Institute of Physics SB RAS
FSRC “Crystallography and Photonics” RAS
Moscow Steel and Alloys Institute

Доп.точки доступа:
Ovchinnikov, S. G. \int. adv. com.\; Овчинников, Сергей Геннадьевич; Zagorskiy, D. L.; Semenov, S. V.; Семёнов, Сергей Васильевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Doludenko, I. M.; Balaev, D. A.; Балаев, Дмитрий Александрович; Panina, L. V.; Samarkand International Symposium on Magnetism(2023 ; July 2-6 ; Samarkand); Samarkand State University
}
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16.

The effect of copper and iron adsorption on the catalytic performance of alumina nanofiber / nanodiamond composite in sensing applications / N. O. Ronzhin, E. D. Posokhina, E. V. Mikhlina [et al.] // J. Phys. Chem. Solids. - 2022. - Vol. 167. - Ст. 110785, DOI 10.1016/j.jpcs.2022.110785. - Cited References: 68. - This work is supported by the Russian Foundation for Basic Research, Project 18–29–19078. The authors would like to express their special thanks to Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» for providing the equipment to ensure the accomplishment of this project . - ISSN 0022-3697
Кл.слова (ненормированные):
Nanodiamonds -- Alumina nanofibers -- Indicator system -- Copper ions -- Iron ions -- Phenol detection
Аннотация: Phenolic compounds are common environmental pollutants, which are used in many industries and contaminate water environment due to industrial wastewater discharge. Presently, there is an increasing demand for the development and improvement of inexpensive, easy-to-use analytical tools for in-situ detection of phenolic compounds. In this work, we investigate the effect of adsorption of Cu2+ and Fe2+ ions on the catalytic activity of a composite material based on alumina nanofibers (ANF) and detonation nanodiamonds (DND) in the co-oxidation of phenols with 4-aminoantipyrine in the presence of hydrogen peroxide. We have found more than two-fold increase of the catalytic activity for ANF + DND + Cu composite, while the activity of ANF + DND + Fe composite is found to decrease by several times in comparison with the original ANF + DND material. The results of FTIR analysis indicate that the adsorption of iron ions occurs with the formation of hydroxide surface groups and hydrogen bonds, which apparently block their catalytic activity in the Fenton redox cycle. The higher catalytic performance of AND + DND composite functionalized with copper ions makes it possible to detect two times lower concentrations of analytes (phenol and 4-chlorophenol) in comparison with the original composite. It is shown that the AND + DND + Cu composite provides a linear yield of the co-oxidation reaction product in a wide range of analyte concentrations (0.25–100 μM for phenol and 0.5–25 μM for 4-chlorophenol). Model experiments demonstrate the applicability of copper-functionalized composite as a reusable sensor for the determination of phenol in aqueous samples.

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Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation
Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ronzhin, N. O.; Posokhina, E. D.; Mikhlina, E. V.; Shestakov, N. P.; Шестаков, Николай Петрович; Nemtsev, I. V.; Немцев, Иван Васильевич; Bondar, V. S.; Ryzhkov, I. I.
}
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17.

Starch-coated magnetic iron oxide nanoparticles for affinity purification of recombinant proteins / V. V. Krasitskaya, A. N. Kudryavtsev, R. N. Yaroslavtsev [et al.] // Int. J. Mol. Sci. - 2022. - Vol. 23, Is. 10. - Ст. 5410, DOI 10.3390/ijms23105410. - Cited References: 37. - This study was supported by the Russian Science Foundation and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Acitvities, project No. 22-14-20020 . - ISSN 1661-6596
Кл.слова (ненормированные):
iron oxide nanoparticles -- starch -- affinity sorbent -- maltose-binding protein -- hybrid proteins purification
Аннотация: Starch-coated magnetic iron oxide nanoparticles have been synthesized by a simple, fast, and cost-effective co-precipitation method with cornstarch as a stabilizing agent. The structural and magnetic characteristics of the synthesized material have been studied by transmission electron microscopy, Mossbauer spectroscopy, and vibrating sample magnetometry. The nature of bonds between ferrihydrite nanoparticles and a starch shell has been examined by Fourier transform infrared spectroscopy. The data on the magnetic response of the prepared composite particles have been obtained by magnetic measurements. The determined magnetic characteristics make the synthesized material a good candidate for use in magnetic separation. Starch-coated magnetic iron oxide nanoparticles have been tested as an affinity sorbent for one-step purification of several recombinant proteins (cardiac troponin I, survivin, and melanoma inhibitory activity protein) bearing the maltose-binding protein as an auxiliary fragment. It has been shown that, due to the highly specific binding of this fragment to the starch shell, the target fusion protein is selectively immobilized on magnetic nanoparticles and eluted with the maltose solution. The excellent efficiency of column-free purification, high binding capacity of the sorbent (100–500 µg of a recombinant protein per milligram of starch-coated magnetic iron oxide nanoparticles), and reusability of the obtained material have been demonstrated.

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, 660036, Russian Federation
Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, 660036, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Krasitskaya, V. V.; Kudryavtsev, A. N.; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Stolyar, S. V.; Столяр, Сергей Викторович; Frank, L. A.
}
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18.

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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19.

Tuning of the interparticle interactions in ultrafine ferrihydrite nanoparticles / Y. V. Knyazev, D. A. Balaev, R. N. Yaroslavtsev [et al.] // Adv. Nano Res. - 2022. - Vol. 12, Is. 6. - P. 605-616, DOI 10.12989/anr.2022.12.6.605. - Cited References: 73. - This study was supported by the Russian Science Foundation, project no. 21-72-00025 “Tuning the Magnetic Properties of Ultrafine Biocompatible Ferrihydrite Nanoparticles through Interparticle Interactions” (https://rscf.ru/project/21-72-00025/) . - ISSN 2287-237X
Кл.слова (ненормированные):
ferrihydrite ultrafine nanoparticles -- hyperfine structure -- interparticle interactions -- iron oxyhydroxide -- superparamagnetic relaxation -- surface coatings
Аннотация: We prepared two samples of ultrafine ferrihydrite (FH) nanoparticle ensembles of quite a different origin. First is the biosynthesized sample (as a product of the vital activity of bacteria Klebsiella oxytoca (hereinafter marked as FH-bact) with a natural organic coating and negligible magnetic interparticle interactions. And the second one is the chemically synthesized ferrihydrite (hereinafter FH-chem) without any coating and high level of the interparticle interactions. The interparticle magnetic interactions have been tuned by modifying the nanoparticle surface in both samples. The coating of the FH-bact sample has been partially removed by annealing at 150℃ for 24 h (hereinafter FH-annealed). The FH-chem sample, vice versa, has been coated (1.0 g) with biocompatible polysaccharide (arabinogalactan) in an ultrasonic bath for 10 min (hereinafter FH-coated). The changes in the surface properties of nanoparticles have been controlled by XPS. According to the electron microscopy data, the modification of the nanoparticle surface does not drastically change the particle shape and size. A change in the average nanoparticle size in sample FH-annealed to 3.3 nm relative to the value in the other samples (2.6 nm) has only been observed. The estimated particle coating thickness is about 0.2-0.3 nm for samples FH-bact and FH-coated and 0.1 nm for sample FH-annealed. Mössbauer and magnetization measurements are definitely shown that the drastic change in the blocking temperature is caused by the interparticle interactions. The experimental temperature dependences of the hyperfine field hf>(T) for samples FH-bact and FH-coated have not revealed the effect of interparticle interactions. Otherwise, the interparticle interaction energy Eint estimated from the hf>(T) for samples FH-chem and FH-annealed has been found to be 121kB and 259kB, respectively.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Balaev, D. A.; Балаев, Дмитрий Александрович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Krasikov, A. A.; Красиков, Александр Александрович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Mikhlin, Y. L.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Stolyar, S. V.; Столяр, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович
}
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20.

Begunovich, L. V.
Magnetic collapse in Fe3Se4 under high pressure / L. V. Begunovich, M. M. Korshunov, S. G. Ovchinnikov // Materials. - 2022. - Vol. 15, Is. 13. - Ст. 4583, DOI 10.3390/ma15134583. - Cited References: 27. - L.V.B. and S.G.O. acknowledge the support of the Russian Science Foundation (Project 18-12-00022Π). We acknowledge the useful discussions with M.A. Vysotin. L.V.B. would like to thank the Information Technology Center, Novosibirsk State University, for providing access to their supercomputer facilities . - ISSN 1996-1944
Кл.слова (ненормированные):
band structure -- magnetic moment -- DFT -- pressure -- ferrimagnet -- ferromagnet -- iron selenide
Аннотация: Electronic structure and magnetic properties of Fe3Se4 are calculated using the density functional approach. Due to the metallic properties, magnetic moments of the iron atoms in two nonequivalent positions in the unit cell are different from ionic values for Fe3+ and Fe2+ and are equal to M1=2.071μB and M2=−2.042μB, making the system ferrimagnetic. The total magnetic moment for the unit cell is 2.135μB. Under isotropic compression, the total magnetic moment decreases non-monotonically and correlates with the non-monotonic dependence of the density of states at the Fermi level N(EF). For 7% compression, the magnetic order changes from the ferrimagnetic to the ferromagnetic. At 14% compression, the magnetic order disappears and the total magnetic moment becomes zero, leaving the system in a paramagnetic state. This compression corresponds to the pressure of 114 GPa. The magnetic ordering changes faster upon application of an isotropic external pressure due to the sizeable anisotropy of the chemical bondings in Fe3Se4. The ferrimagnetic and paramagnetic states occur under pressures of 5.0 and 8.0 GPa, respectively. The system remains in the metallic state for all values of compression.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Бегунович, Людмила Витальевна
}
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