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    An effect of reduced S-rich fluids on diamond formation under mantle-slab interaction / Y. V. Bataleva [et al.] // Lithos. - 2019. - Vol. 336-337. - P. 27-39, DOI 10.1016/j.lithos.2019.03.027. - Cited References: 73. - This work was supported by the Russian Science Foundation under Grant No. 14-27-00054 and a state assignment of IGM SB RAS. The authors thank S. Ovchinnikov for his assistance in implementation of the Mossbauer spectroscopy measurements. . - ISSN 0024-4937
   Перевод заглавия: Влияние восстановленных S-обогащенных флюидов на образование алмаза при взаимодействии мантиевых плит
Кл.слова (ненормированные):
Sulfur-rich fluid -- Iron carbide -- Diamond -- Mantle sulfides -- High-pressure experiment
Аннотация: Experimental study, dedicated to understanding the effect of S-rich reduced fluids on the diamond-forming processes under subduction settings, was performed using a multi-anvil high-pressure split-sphere apparatus in Fe3C-(Mg,Ca)CO3-S and Fe0-(Mg,Ca)CO3-S systems at the pressure of 6.3 GPa, temperatures in the range of 900–1600 °C and run time of 18–60 h. At the temperatures of 900 and 1000 °C in the carbide-carbonate-sulfur system, extraction of carbon from cohenite through the interaction with S-rich reduced fluid, as well as C0-producing redox reactions of carbonate with carbide were realized. As a result, graphite formation in assemblage with magnesiowüstite, cohenite and pyrrhotite (±aragonite) was established. At higher temperatures (≥1100 °C) formation of assemblage of Fe3+-magnesiowüstite and graphite was accompanied by generation of fO2-contrasting melts - metal-sulfide with dissolved carbon (Fe-S-C) and sulfide-oxide (Fe-S-O). In the temperature range of 1400–1600 °C spontaneous diamond nucleation was found to occur via redox interactions of carbide or iron with carbonate. It was established, that interactions of Fe-S-C and Fe-S-O melts as well as of Fe-S-C melt and magnesiowüstite, were С0-forming processes, accompanied by disproportionation of Fe. These resulted in the crystallization of Fe3+-magnesiowüstite+graphite assemblage and growth of diamond. We show that a participation of sulfur in subduction-related elemental carbon-forming processes results in sharp decrease of partial melting temperatures (~300 °C), reducting the reactivity of the Fe-S-C melt relatively to FeC melt with respect to graphite and diamond crystallization and decrease of diamond growth rate.

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Sobolev Institute of Geology and Mineralogy, Mineralogy Siberian Branch of the Russian Academy of Sciences, Academican Koptyug Ave., 3, Novosibirsk, 630090, Russian Federation
Novosibirsk State University, Pirogova str., 2, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Bataleva, Y. V.; Palyanov, Y. N.; Borzdov, Y. M.; Novoselov, I. D.; Bayukov, O. A.; Баюков, Олег Артемьевич
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    Processes and conditions of the origin for Fe3+-bearing magnesiowustite under lithospheric mantle pressures and temperatures / Y. Bataleva [et al.] // Minerals. - 2019. - Vol. 9, Is. 8. - Ст. 474, DOI 10.3390/min9080474. - Cited References: 82. - This research was performed by state assignment of IGM SB RAS (project No. 0330-2016-0007). . - ISSN 2075-163X
   Перевод заглавия: Процессы и условия зарождения магнезиовюстита, несущего Fe3+, при давлении и температуре литосферной мантии
Рубрики:
Mineral Geochemistry and Geochronology
Кл.слова (ненормированные):
Fe3+-bearing magnesiowustite -- Mantle oxides -- Experimental modeling -- High-pressure experiment -- Redox reactions -- Lithospheric mantle -- Diamond -- Graphite
Аннотация: An experimental study, implicated in the revealing of the conditions for the origin for Fe3+-bearing magnesiowüstite in the lithospheric mantle, was performed using Mössbauer spectroscopy of pre-synthesized samples. Experiments were carried out using a multi-anvil high-pressure split-sphere apparatus at 6.3–7.5 GPa, in the range of 1100–1650 °C in carbonate-metal, carbonate–oxide-metal, carbonate-oxide, carbide-oxide and carbonate–metal-sulphur systems. In three experimental series, oxygen fugacity gradient in the samples was created, which enabled the study of the processes of magnesiowüstite formation under oxidizing and reducing conditions (ΔlogfO2 (FMQ) values from −1 to −5). It was established that Fe3+-bearing magnesiowüstite can form both in assemblage with oxidized phases, such as carbonate or with reduced ones—metal, carbides, sulphides, graphite and diamond. According to the Mössbauer spectroscopy, the composition of synthesized magnesiowüstite varied within a range of Fe3+/ΣFe values from 0 to 0.3, with IV and VI coordination of Fe3+ depending on P, T, fO2, x-parameters. It was established that Fe3+-bearing magnesiowüstite formation processes under upper mantle P,T-conditions include redox reactions, with magnesiowüstite being (1) reductant or (2) product of interaction, (3) crystallization processes of magnesiowüstite from an oxidized melt, where magnesiowüstite acts as a sink for ferric iron and (4) iron disproportionation.

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Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Koptyug ave 3, Novosibirsk, 630090, Russian Federation
Department of Geology and Geophysics, Novosibirsk State University, Pirogova str 2, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Bataleva, Y.; Palyanov, Y.; Borzdov, Y.; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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Optical properties of the HoGa3(BO3)4 crystal: experiment and ab initio calculation / S. N. Krylova, A. S. Aleksandrovsky, E. M. Roginskii [et al.] // Ferroelectrics. - 2020. - Vol. 559, Is. 1. - P. 135-140, DOI 10.1080/00150193.2020.1722015. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (grant No 18-02-00754) . - ISSN 0015-0193
Кл.слова (ненормированные):
HoGa3(BO3)4 -- ab initio calculation -- absorption spectrum -- band structure
Аннотация: Single crystal of HoGa3(BO3)4 has been grown using solution-melt synthesis. The optical band gap determined from the measured absorption spectrum is due to direct allowed transition and equals to 4.14 eV. The optical properties of this crystal are calculated by the plane-wave pseudo-potential method based on density functional theory. The structure of the crystal has been optimized. The electronic structure of HoGa3(BO3)4 is calculated. The experimental and theoretical fundamental absorption spectra are compared. The calculated bandgap is in good agreement with the experimental data.

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Держатели документа:
Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Ioffe Institute, St. Petersburg, Russian Federation
St. Petersburg State University, St. Petersburg, Russian Federation
Moscow Institute of Physics and Technology, Dolgoprudny, Russian Federation

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Roginskii, E. M.; Krylov, A. A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Vtyurin, A. N.; Втюрин, Александр Николаевич
}
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Bound state in the continuum in 1D chain of dielectric disks: Theory and experiment / M. Balyzin [et al.] // J. Phys. Conf. Ser. - 2018. - Vol. 1092: 3rd International Conference on Metamaterials and Nanophotonics, METANANO 2018 (17 - 21 September 2018). - Ст. 012012, DOI 10.1088/1742-6596/1092/1/012012. - Cited References: 11. - This work is supported by RSF (17-12-01581)
Кл.слова (ненормированные):
1-D chains -- Bound state -- Ceramic disks -- Dielectric disks -- GHz frequencies -- Material loss -- Quadratic growth -- Zero angular momentum
Аннотация: In this work we experimentally observe a symmetry protected optical bound state in the continuum (BIC) with zero angular momentum in 1D array of ceramic disks at GHz frequencies. We analyze the dependence of Q factor of BIC on the number of the disks and the level of the material losses. We confirmed theoretical prediction about quadratic growth of the Q factor with the number of the disks and its following saturation due to material losses.

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Держатели документа:
Department of Nanophotonics and Metamaterials, ITMO University, Saint-Petersburg, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balyzin, M.; Sadrieva, Z.; Belyakov, M. A.; Kapitanova, P.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Bogdanov, A.; International Conference on Metamaterials and Nanophotonics(3rd ; 17 - 21 September 2018 ; Sochi, Russian Federation)
}
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    Graphite and diamond formation in the carbide–oxide–carbonate interactions (Experimental modeling under mantle P,T-conditions) / Y. Bataleva [et al.] // Minerals. - 2018. - Vol. 8, Is. 11. - Ст. 522, DOI 10.3390/min8110522. - Cited References: 67. - The authors express their sincere thanks to the in-house Editor, the guest Academic Editor, and three anonymous Reviewers for helpful and constructive reviews. The authors thank S. Ovchinnikov for his assistance in implementation of Mössbauer spectroscopy measurements and A. Moskalev for his assistance in the work preparation. . - ISSN 2075-163X
   Перевод заглавия: Образование графита и алмаза при взаимодействиях карбид-оксид-карбонат (экспериментальное моделирование в Р,Т-условиях мантии)
Кл.слова (ненормированные):
Cohenite -- Graphite -- Diamond -- CO2 fluid -- Carbonate -- Garnet -- Experiment -- High pressure -- Lithospheric mantle -- Metasomatism
Аннотация: Experimental modeling of the formation of graphite and diamond as a result of carbide–fluid interactions was performed in the Fe3C–SiO2–Al2O3–(Mg,Ca)CO3 systems at 6.3 and 7.5 GPa and 1100–1650 °C. In the experiments with ƒO2-gradient (7.5 GPa, 1250–1350 °C), graphite + magnesiowüstite + garnet ± cohenite assemblage was formed. Graphite was produced through the redox interactions of carbide with carbonate or CO2 (reducing conditions), and redox reactions of magnesiowüstite and CO2 (oxidizing conditions). At 1450–1650 °C, crystallization of graphite, garnet, magnesiowüstite and ferrospinel, as well as generation of Fe2+,3+-rich carbonate–silicate melt occurred. This melt, saturated with carbon, acted as a medium of graphite crystallization and diamond growth on seeds. In the experiments without ƒO2-gradient (6.3 GPa), decarbonation reactions with the formation of CO2-fluid and Fe,Mg,Ca-silicates, as well as C0-producing redox reactions of CO2-fluid with cohenite were simultaneously realized. As a result, graphite (± diamond growth) was formed in assemblage with Fe2+,Fe3+,Mg-silicates and magnetite (1100–1200 °C), or with Fe3+-rich garnet and orthopyroxene (1300–1500 °C). It has been established that a potential mechanism for the crystallization of graphite or diamond growth is the oxidation of cohenite by CO2-fluid to FeO and Fe3O4, accompanied by the extraction of carbon from Fe3C and the corresponding reduction of CO2 to C0.

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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Koptyug ave 3, Novosibirsk, 630090, Russian Federation
Department of Geology and Geophysics, Novosibirsk State University, Pirogova str 2, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Bataleva, Y.; Palyanov, Y.; Borzdov, Y.; Novoselov, I.; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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Quasi-bound States in the Continuum in a Finite Chain of Dielectric Scatterers: Theory and Experiment / M. Balyzin [et al.] ; ed.: W. C. Chew, S. . He // Progress in Electromagnetics Research Symposium (PIERS-Toyama) : IEEE, 2018. - Vol. 2018-August. - P. 2516-2519. - (Progress in Electromagnetics Research Symposium), DOI 10.23919/PIERS.2018.8598011. - Cited References: 27. - This work was supported by the Russian Foundation for Basic Research (16-37-60064, 17-02-01234, 16-02-00314), the Ministry of Education and Science of the Russian Federation (3.1668.2017/4.6), the President of Russian Federation (MK-403.2018.2). . -

РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
LIGHT
Аннотация: In this work we experimentally observe a symmetry protected optical bound state in the continuum (BIC) with zero angular momentum in 1D array of ceramic disks at GHz frequencies. We analyze the dependence of Q factor of BIC on the number of the disks and the level of the material losses. We confirmed theoretical prediction about quadratic growth of the Q factor with the number of the disks and its following saturation due to material losses.

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Держатели документа:
ITMO Univ, Dept Nanophoton & Metamat, St Petersburg, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.

Доп.точки доступа:
Balyzin, M.; Sadrieva, Z.; Belyakov, M. A.; Kapitanova, P.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Bogdanov, A. A.; Chew, W.C. \ed.\; He, S... \ed.\; Russian Foundation for Basic Research [16-37-60064, 17-02-01234, 16-02-00314]; Ministry of Education and Science of the Russian Federation [3.1668.2017/4.6]; Russian Federation [MK-403.2018.2]; Progress in Electromagnetics Research Symposium 2018(Aug 01-04, 2018 ; Toyama, Japan)
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    Музалевский, Константин Викторович.
    Дистанционное измерение профилей влажности в пахотном слое почвы на основе поляриметрических наблюдений коэффициента отражения в P- и C-диапазонах частот. Эксперимент / К. В. Музалевский // Соврем. проблемы дистанц. зондир. Земли из космоса. - 2020. - Т. 17, № 3. - С. 145-148, DOI 10.21046/2070-7401-2020-17-3-145-148. - Библиогр.: 5. - Работа выполнена в рамках проекта Российского фонда фундаментальных исследований № 18-05-00405, методика измерения коэффициентов отражения была развита при поддержке проекта государственного задания № 0356-2019-0004 . - ISSN 2070-7401. - ISSN 2411-0280
   Перевод заглавия: Remote sensing of moisture profiles in the arable soil layer based on polarimetric observations of the reflection coefficient in the P- and C-bands. Experiment
Кл.слова (ненормированные):
радиолокация -- беспилотный летательный аппарат -- агропочвы -- влажность почвы -- пахотный слой -- диэлектрическая проницаемость -- Radar -- Unmanned aerial vehicle -- Agricultural soils -- Soil moisture -- Arable layer -- Dielectric constant
Аннотация: В данном сообщении экспериментально подтверждена принципиальная возможность дистанционного измерения профилей влажности в пахотном слое почвы с пригодной для практического применения точностью на основе поляриметрических измерений коэффициента отражения на двух частотах 630 МГц и 5,4 ГГц. Коэффициенты отражения измерялись под углом 35° импульсным методом в ходе естественных циклов испарения и увлажнения пахотного слоя почвы на участке сельскохозяйственного поля, находящегося под паром в районе пос. Минино, Красноярский край. Профили влажности почвы восстанавливались в ходе решения обратной задачи, информативным признаком в которой выступало отношение коэффициентов обратного радарного рассеяния на согласованных линейных поляризациях. Отношение коэффициентов обратного радарного рассеяния было оценено в скалярном приближении метода Кирхгофа в виде отношения коэффициентов отражения по мощности, измеренных на горизонтальной и вертикальной поляризациях. Среднеквадратическое отклонение и коэффициент детерминации между восстановленными и измеренными значениями объёмной влажности в поверхностном слое почвы толщиной 10 см оказались равны 2,2 % и 0,91 соответственно. Исследование показывает перспективность разработки поляриметрических многочастотных радиолокационных систем комбинированного сверхвысокочастотного и дециметрового диапазонов для дистанционного зондирования профилей влажности пахотного слоя почв.
This report experimentally confirmed the fundamental possibility of remote sensing of moisture profiles in the arable soil layer with practical acceptable accuracy based on polarimetric measurements of the reflection coefficient at two frequencies of 630 MHz and 5.4 GHz. Reflection coefficients were measured at an angle of 35° by the impulse method, during natural cycles of the evaporation and moistening of soil arable layer in a plot of an agricultural field under steam in the area of Minino village, Krasnoyarsk region. Soil moisture profiles were retrieved in the course of solving the inverse problem, in which cost function was the ratio of the backscattering coefficients taken on coincident linear polarizations. The ratio of the backscattering coefficients was estimated by the scalar Kirchhoff approximation in the form of a ratio of power reflection coefficients, which were measured on horizontal and vertical polarizations. The standard deviation and the determination coefficient between the retrieved and measured soil moisture in the 10 cm topsoil were 2.2 % and 0.91, respectively. The study shows the prospects of developing polarimetric multi-frequency radar systems of combined UHF and SHF bands for remote sensing of moisture profiles in the arable layer of soils.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Muzalevskiy, K. V.
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Experimental and numerical investigations of the magnetization curves in the nanocomposites consisted of several ferromagnetic phases / S. Komogortsev [et al.] // TRENDS IN MAGNETISM. - 2011. - Vol. 168-169. - P369-372, DOI 10.4028/www.scientific.net/SSP.168-169.369 . - ISSN 1012-0394
Кл.слова (ненормированные):
approach to saturation -- ferromagnetic correlations -- magnetization curves -- numerical experiment -- two-phase nanomaterials -- ferromagnetic materials -- ferromagnetism -- magnetic anisotropy -- nanocomposites -- nanostructured materials -- anisotropy -- ferromagnetic materials -- ferromagnetism -- magnetic anisotropy -- magnetization -- nanostructured materials -- saturation magnetization -- approach to saturation -- ferromagnetic correlations -- magnetization curves -- numerical experiments -- two-phase nanomaterials -- ferromagnetic exchange -- ferromagnetic phasis -- magnetic anisotropy constant -- numerical investigations -- two phase -- saturation magnetization -- magnetism
Аннотация: The magnetization correlation function for two-phase one-dimentional chain of the ferromagnetic exchange-coupled nanoparticles with a random anisotropy was calculated. The dependence of the magnetic correlation radius and the average magnetic anisotropy constant on the intrinsic size of the phase inhomogeneity was founded. The data allows estimating the applicability limits of the analytical equations for the magnetization curves approaching saturation of two-phase ferromagnetic nanomaterials.

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Держатели документа:
Kirensky Institute of Physics, SD of RAS, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian State Technological University, 82 Mira Prospect, Krasnoyarsk, 660049, Russian Federation
Krasnoyarsk State Pedagogical University, 89 A.Lebedevoy Street, Krasnoyarsk, 660049, Russian Federation
Siberian Federal University, 79 Svobodny Prospect, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Komogortsev, S.V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Balaev, A. D.; Балаев, Александр Дмитриевич; Chekanova, L. A.; Чеканова, Лидия Александровна; Denisova, E. A.; Денисова, Елена Александровна; Eremin, E. V.; Еремин, Евгений Владимирович; Smirnov, S.; Momot, N.
}
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Raman spectroscopy of SrLnCuS3 (Ln = La, Nd, Tm): experiment and ab initio calculation / S. N. Krylova, V. А. Chernyshev, A. V. Ruseikina [et al.] // XVIII International Feofilov symposium on spectroscopy of crystals doped with rare earth and transition metal ions (IFS-2022) : book of abstracts : Aug. 22-27, 2022, Moscow, Russia. - 2022. - P. 71-72. - Библиогр.: 8. - The work of Krylova S. was financially supported by the Russian Foundation for Basic Research and DFG project number No 21-52-12018. The research of Ruseikina A. was supported by the Tyumen region within the framework of the grant agreement in the form of a grant to non-profit organizations no. 89-don dated 07.12.2020. Chernyshev V. thanks the Ministry of Science and Higher Education of the Russian Federation (project no. FEUZ-2020-0054) for financial support. . - ISBN 978-5-89513-513-6
Аннотация: The Raman spectra of SrLaCuS3, SrNdCuS3, SrTmCuS3 compounds have been investigated. Ab initio calculations of the crystal structure and phonon spectrum of the compounds have been carried out. The types and wave numbers of the fundamental modes have been determined. The experimental Raman spectra have been interpreted.

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, 660036, Russia
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russia
Institute of Chemistry, University of Tyumen, Tyumen, 625003, Russia

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Chernyshev, V. А.; Ruseikina, A. V.; Grigoriev, M. V.; Aleksandrovskiy, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; International Feofilov symposium on spectroscopy of crystals doped with rare earth and transition metal ions(18 ; 2022 ; Aug. ; Moscow); Физический институт им. П.Н. Лебедева РАН; Институт спектроскопии РАН
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10.

Muzalevskiy, K. V.
Synthesizing of ultra-wide band impulse by means of a log-periodic dipole antenna. Case study for a radar stand experiment / K. Muzalevskiy, M. Mikhaylov, Z. Ruzicka // 2022 IEEE International Multi-Conference on Engineering, Computer and Information Sciences, SIBIRCON 2022 : IEEE, 2022. - P. 1140-1143, DOI 10.1109/SIBIRCON56155.2022.10017008. - Cited References: 20. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project № 22-17-20042
Кл.слова (ненормированные):
Microwave remote sensing -- log-periodic dipole antenna -- calibration antenna -- complex antenna transfer function -- ultra-wide band impulse -- radiation and receiving impulse
Аннотация: In this work, the approach of ultra-wide band pulses synthesizing is proposed using a broadband low-cost log-periodic dipole antenna and a vector network analyzer. Synthesis of UWB pulse (duration of 2.2ns) became possible due to minimization of antenna dispersion by compensation of amplitude and phase-frequency distortions introduced by the antenna into radiated and received pulse. The method had been developed for a down-looking antenna in a monostatic radar configuration. The antenna return loss was calculated using the model of two-port linear network with S-parameters. To calibrate the model, an original amplitude-phase method was proposed that requires measuring the antenna's return loss when the antenna is located only at several heights above the reflecting surface (metal sheet). In this case, the antenna return loss in an empty room does not need to be measured. The proposed method for synthesizing UWB pulses does not require changes in the design of the antenna and can be implemented as an additional software calibration of the antenna-feeder path. The proposed method of UWB pulses synthesizing can be implemented using miniature, low-cost vector network analyzers for environment remote sensing from unmanned aerial vehicle using the UWB impulses.

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Держатели документа:
Kirensky Institute of Physics Federal Research Center, Laboratory of Radiophysics of the Earth Remote Sensing, KSC Siberian Branch, Russian Academy of Science, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Mikhaylov, M. I.; Михайлов, Михаил Иванович; Ruzicka, Z.; Ружичка, Зденек; Музалевский, Константин Викторович; IEEE International Multi-Conference on Engineering, Computer and Information Sciences 2022(1-13 November 2022 ; Yekaterinburg, Russian Federation)
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