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AIZENBERG, L. A.
CALCULATION EXPERIMENT ON THE HIGH-RESOLUTION OF PHYSICAL DEVICES BY THE EXTRAPOLATION OF THE FOURIER SPECTRUM OF UNIDIMENSIONAL FINITE SIGNALS / L. A. AIZENBERG, B. A. KRAVTSOV // Pisma Zhurnal Tek. Fiz. - 1987. - Vol. 13, Is. 19. - P. 1193-1197. - Cited References: 6 . - ISSN 0320-0116

РУБ Physics, Applied

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Доп.точки доступа:
KRAVTSOV, B. A.
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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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Держатели документа:
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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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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Characteristics of the magnetic microstructure of amorphous and nanocrystalline ferromagnets with a random anisotropy: Theoretical estimates and experiment / R. S. Iskhakov [et al.] // JETP Letters. - 2000. - Vol. 72, Is. 12. - P. 603-607, DOI 10.1134/1.1351199. - Cited References: 22 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
ALLOYS
Аннотация: An experimental determination (both direct and indirect) of the characteristics of the magnetic microstructure, namely, the ferromagnetic correlation radius R-f and the rms fluctuation of the mean anisotropy D-1/2H-a, is performed for amorphous and nanocrystalline ferromagnets with a random anisotropy characterized by the quantities R-c and (DHa)-H-1/2, respectively. The magnetization curves of amorphous and nanocrystalline ferromagnets are found to exhibit a dependence on H that is caused by the alignment of the magnetizations of individual magnetic blocks with the field. (C) 2000 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Univ Routes Commun, Krasnoyarsk Branch, Krasnoyarsk 660028, Russia
Moscow MV Lomonosov State Univ, Moscow 119899, Russia
ИФ СО РАН

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Moroz, Z. M.; Shalygina, E. E.
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Conditions for diamond and graphite formation from iron carbide at the P-T parameters of lithospheric mantle / Y. V. Bataleva [et al.] // Russ. Geol. Geophys. - 2016. - Vol. 57, Is. 1 : Tectonics, geodynamics, and petrology of earth’s lithosphere and mantle (to the 80th birthday of Academician Nikolai Leontievich Dobretsov). - P. 176-189, DOI 10.1016/j.rgg.2016.01.012. - Cited References:55. - This work was supported by the Russian Science Foundation under Grant No. 14-27-00054. . - ISSN 1068-7971. - ISSN 1878-030X

РУБ Geosciences, Multidisciplinary
Рубрики:
DEEP CARBON-CYCLE
   EARTHS MANTLE
   MINERAL INCLUSIONS
   HIGH-PRESSURE
   KOKCHETAV MASSI
   SUBDUCTION ZONES
   REDOX BUDGET
   FERRIC IRON
   MOSSBAUER
   METAL
Кл.слова (ненормированные):
iron carbide -- wusite -- graphite -- diamond -- oxides -- olivine -- subduction -- redox interaction -- lithospheric mantle -- high-pressure experiment
Аннотация: To estimate conditions for the stability of iron carbide under oxidation conditions and to assess the possibility of formation of elemental carbon by interaction between iron carbide and oxides, experimental modeling of redox interaction in the systems Fe3C-Fe2O3 and Fe3C-Fe2O3-MgO-SiO2 was carried out on a split-sphere high-pressure multianvil apparatus at 6.3 GPa and 900-1600 degrees C for 18-20 h. During carbide-oxide interaction in the system Fe3C-Fe2O3, graphite crystallizes in assemblage with Fe3+-containing wusite. Graphite forms from carbide carbon mainly by cohenite oxidation: Fe3C + 3Fe(2)O(3) -> 9FeO + C-0 and FeO + Fe3C -> (Fe2+, Fe3+)O + C-0. At above-solidus temperatures (>= 1400 degrees C), when metal-carbon melt is oxidized by wusite, graphite and diamond crystallize by the redox mechanism and form the Fe3+-containing wstite + graphite/diamond assemblage. Interaction in the system Fe3C-Fe2O3-MgO-SiO2 results in the formation of Fe3+-containing mannesiowusite-olivine-graphite assemblage. At >= 1500 degrees C, two melts with contrasting f(O2) values are generated: metal-carbon and silicate-oxide; their redox interaction leads to graphite crystallization and diamond growth. Under oxidation conditions, iron carbide is unstable in the presence of iron, silicon, and magnesium oxides, even at low temperatures. Iron carbide-oxide interaction at the mantle temperatures and pressures leads to the formation of elemental carbon; graphite is produced from carbide carbon mainly by redox reactions of cohenite (or metal-carbon melt) with Fe2O3 and FeO as well as by interaction between metal-carbon and silicate-oxide melts. The results obtained suggest that cohenite can be a potential source of carbon during graphite (diamond) formation in the lithospheric mantle and the interaction of iron carbide with iron, silicon, and magnesium oxides, during which carbon is extracted can be regarded as a process of the global carbon cycle. (C) 2016, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.

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Публикация на русском языке Условия образования графита и алмаза из карбида железа при Р, Т-параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Геол. и геофиз. - 2016. - Т. 57 № 1. - С. 225-240

Держатели документа:
Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Pr Akad Koptyuga 3, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Ul Pirogova 2, Novosibirsk 630090, Russia.
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.; Russian Science Foundation [14-27-00054]
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Conditions of formation of iron-carbon melt inclusions in garnet and orthopyroxene under P-T conditions of lithospheric mantle / Y. V. Bataleva [et al.] // Petrology. - 2018. - Vol. 26, Is. 6. - P. 565-574, DOI 10.1134/S0869591118060024. - Cited References: 45. - This work was supported by the Russian Foundation for Basic Research (project no. 16-35-60024) and a State Assignment (project no. 0330-2016-0007). . - ISSN 0869-5911. - ISSN 1556-2085

РУБ Geosciences, Multidisciplinary + Mineralogy
Рубрики:
EARTHS LOWER MANTLE
   DIAMOND FORMATION
   DEEP MANTLE
   PHYSICOCHEMICAL PARAMETERS
Кл.слова (ненормированные):
high-pressure experiment -- metal-carbon melt -- graphite -- diamond -- CO2-fluid -- mantle silicates -- mantle metasomatism
Аннотация: Of great importance in the problem of redox evolution of mantle rocks is the reconstruction of scenarios of alteration of Fe0- or Fe3C-bearing rocks by oxidizing mantle metasomatic agents and the evaluation of stability of these phases under the influence of fluids and melts of different compositions. Original results of high-temperature high-pressure experiments (P = 6.3 GPa, T = 1300–1500°С) in the carbide–oxide–carbonate systems (Fe3C–SiO2–(Mg,Ca)CO3 and Fe3C–SiO2–Al2O3–(Mg,Ca)CO3) are reported. Conditions of formation of mantle silicates with metallic or metal–carbon melt inclusions are determined and their stability in the presence of CO2-fluid representing the potential mantle oxidizing metasomatic agent are estimated. It is established that garnet or orthopyroxene and CO2-fluid are formed in the carbide–oxide–carbonate system through decarbonation, with subsequent redox interaction between CO2 and iron carbide. This results in the formation of assemblage of Fe-rich silicates and graphite. Garnet and orthopyroxene contain inclusions of a Fe–C melt, as well as graphite, fayalite, and ferrosilite. It is experimentally demonstrated that the presence of CO2-fluid in interstices does not affect on the preservation of metallic inclusions, as well as graphite inclusions in silicates. Selective capture of Fe–C melt inclusions by mantle silicates is one of the potential scenarios for the conservation of metallic iron in mantle domains altered by mantle oxidizing metasomatic agents.

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Публикация на русском языке Условия образования включений железо-углеродного расплава в гранатах и ортопироксенах при P-T параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Петрология. - 2018. - Т. 26 № 6. - С. 571-582

Держатели документа:
Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk, Russia.
Novosibirsk State Univ, Novosibirsk, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk, Russia.

Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Novoselov, I. D.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.; Russian Foundation for Basic Research [16-35-60024]; [0330-2016-0007]
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    Electronic structure of α-SrB4O7: Experiment and theory / A. S. Aleksandrovsky [et al.] // The 7th Russian-French workshop on Nanosciences and Nanotechnologies : Program and abstract book / ed. A. V. Okotrub. - Novosibirsk, 2013. - P. 47 . - ISBN 978-5-901688-29-8
   Перевод заглавия: Электронная структура α-SrB4O7: эксперимент и теория

Материалы конференции

Доп.точки доступа:
Okotrub, A.V. \ed.\; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Atuchin, V. V.; Kesler, V. G.; Zaitsev, A. I.; Зайцев, Александр Иванович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Kuzubov, A. A.; Кузубов, Александр Александрович; Ignatova, N. Y.; Russian-French workshop on Nanosciences and Nanotechnologies(7 ; 2013 ; Jun. ; 3-6 ; Новосибирск); Российская академия наук; Сибирское отделение РАН; Институт неорганической химии им. А.В. Николаева Сибирского отделения РАН; Институт катализа им. Г.К. Борескова Сибирского отделения РАН; Институт физики полупроводников им. А.В. Ржанова Сибирского отделения РАН
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    Electronic structure of α-SrB[[d]]4[[/d]]O[[d]]7[[/d]]: experiment and theory / V. V. Atuchin [et al.] // J. Phys.: Condens. Matter. - 2013. - Vol. 25, no. 8. - Ст. 085503DOI 10.1088/0953-8984/25/8/085503
   Перевод заглавия: Электронная структура α-SrB4O7: эксперимент и теория
Аннотация: The investigation of valence band structure and electronic parameters of constituent element core levels of α-SrB4O7 has been carried out with x-ray photoemission spectroscopy. Optical-quality crystal α-SrB4O7 has been grown by the Czochralski method. Detailed photoemission spectra of the element core levels have been recorded from the powder sample under excitation by nonmonochromatic Al Kα radiation (1486.6 eV). The band structure of α-SrB4O7 has been calculated by ab initio methods and compared to XPS measurements. It has been found that the band structure of α-SrB4O7 is weakly dependent on the Sr-related states.

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Держатели документа:
SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090 90, Russia
SB RAS, Inst Semicond Phys, Lab Phys Bases Integrated Microelect, Novosibirsk 630090 90, Russia
SB RAS, Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036 36, Russia
Siberian Fed Univ, Krasnoyarsk 660041 41, Russia
SB RAS, Inst Phys, Lab Coherent Opt, Krasnoyarsk 660036 36, Russia

Доп.точки доступа:
Atuchin, V. V.; Zaitsev, A. I.; Зайцев, Александр Иванович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Kuzubov, A. A.; Кузубов, Александр Александрович; Ignatova, N. Y.; Kesler, V. G.
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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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10.

    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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