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    Magnetic mechanisms of pairing in strongly correlated electron system of copper oxides / S. G. Ovchinnikov [et al.] // arXiv. - 2015. - Ст. eprint arXiv:1510.08640. - Cited References: 214. - The authors acknowledge support from FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009-2013 (GK 16.740.12.0731 and GK 16.740.11.0740), RFBR (Grants 12-02-31534 and 12-02-31597), Siberian Federal University (Theme #F-11), Governmental support of leading scientific schools of Russia (NSh-1044.2012.2), Program of SB RAS #44, Presidium of RAS program #20.7. EIS, IAM, and MMK are grateful to The Dynasty Foundation and ICFPM forthe financial support. - In book.: Recent advances in superconductivity research", ed. by C.B. Taylor, 321 p., Nova Science Publishers Inc. New York, 2013 ISBN: 978-1-62618-406-0, Chapter 6
Рубрики:
Condensed matter--Strongly correlated electrons
   Superconductivity
Кл.слова (ненормированные):
strong electronic correlations -- cuprates -- Hubbard operators -- electronic structure -- quantum phase transitions -- magnetic mechanism of pairing
Аннотация: The multielectron LDA+GTB approach has been developed to calculate electronic structure of strongly correlated cuprates. At low energies the effective Hamiltonian of the t−t′−t"−t⊥−J∗−J⊥-model has been derived with parameters coming from the ab initio calculation for LSCO. The electronic structure of LSCO has been calculated self-consistently with the short-range antiferromagnetic order for various doping level. Two Lifshitz-type quantum phase transitions with Fermi surface topology changes have been found at dopings xc1=0.15 and xc2=0.24. Its effect on normal and superconducting properties has been calculated. The interatomic exchange parameter and its pressure dependence has been calculated within LDA+GTB scheme. The magnetic mechanisms of d-wave pairing induced by static and dynamical spin correlations are discussed. Simultaneous treatment of magnetic and phonon pairing results in the conclusion that both contributions are of the same order. For two layer cuprates like YBCO the interlayer hopping and exchange effects on the electronic structure and doping dependence of Tc is discussed as well as the Coulomb interaction induced mechanism of pairing.

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Makarov, I. A.; Макаров, Илья Анатольевич; Shneyder, E. I.; Шнейдер, Елена Игоревна; Togushova, Yu.N.; Тогушова Ю.Н.; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Korshunov, M. M.; Коршунов, Максим Михайлович
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Effect of A-site cation ordering on the thermoelectric properties of the complex cobalt oxides Gd1-xSrxCoO3-δ (x = 0.8 and 0.9) / V. A. Dudnikov [et al.] // Ceram. Int. - 2018. - Vol. 44, Is. 9. - P. 10299-10305, DOI 10.1016/j.ceramint.2018.03.037. - Cited References: 38. - This work was supported by the Russian Science Foundation , project no. 16-13-00060. . - ISSN 0272-8842
Кл.слова (ненормированные):
Substituted rare earth cobalt oxides -- Thermoelectric oxide materials -- Ordered and disordered states
Аннотация: The effect of substitution of Sr2+ ions for Gd3+ ions on the phase composition, electrical resistivity, thermoelectricity, and thermal conductivity of rare-earth cobalt oxides Gd1-xSrxCoO3-δ (x = 0.8 and 0.9) has been investigated. It has been determined that at the investigated strontium concentrations, the single-phase disordered nonstoichiometric cubic perovskites and superstructures with ordered Sr2+/Gd3+ ions and anion vacancies can be formed. The influence of ordering/disordering of Gd and Sr cations over crystal-lattice A- sites on the thermoelectric figure of merit and sample stability at high temperatures has been studied. The thermoelectric figure of merit of the disordered samples was found to exceed by far the analogous parameter of the ordered samples, which allows us to consider the disordering as a way of improving the thermoelectric parameters. Two contributions to the conductivities are discussed: high-temperature thermoactivation and low-temperatures variable range hopping. The parameters of the Mott electronic structure, including DOS N(εF), hopping energy ε (the energy of hopping conductivity activation), and hopping length Rh, have been estimated.

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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
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Ioffe Physical-Technical Institute, Russian Academy of Sciences, St. Petersburg, Russian Federation
Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russian Federation

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Kazak, N. V.; Казак, Наталья Валерьевна; Fedorov, A. S.; Федоров, Александр Семенович; Solov'yov, L. A.; Vereshchagin, S. N.; Burkov, A. T.; Novikov, S. V.; Gavrilkin, S. Yu.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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    Вальков, Валерий Владимирович.
    Квантовый транспорт через одномерную цепочку, согнутую в форме квадрата, при учете спин-орбитального взаимодействия Рашбы / В. В. Вальков, А. Д. Федосеев // 20-й Междунар. симп. "Порядок, беспорядок и свойства оксидов" (ODPO-20) : труды симпозиума. - 2017. - Вып. 20, Т. 1. - С. 30-34. - Библиогр.: 5 назв.
   Перевод заглавия: Quantum transport through the 1D square-shaped wire with Rashba spin-orbit coupling
Аннотация: В приближении сильной связи при использовании формализма Ландауэра-Бюттикера исследованы транспортные свойства одномерной цепочки, согнутой в форме квадрата при учете спин-орбитального взаимодействия Рашбы. Обнаружено, что такая геометрия устройства, приводит к возникновению антирезонансов Фано. Показано, что при критической величине спин-орбитального взаимодействия, когда характеристическая длина, связанная с величиной спин-орбитального взаимодействия, совпадает с длиной стороны квадрата, возникает полное отражение от устройства. При величине параметра спин-орбитального взаимодействия близкого к критическому значению прохождение электрона возможно только при энергиях, находящихся в пределах узких интервалов.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Федосеев, Александр Дмитриевич; Fedoseev, A. D.; Val'kov, V. V.; Южный федеральный университет; "Порядок, беспорядок и свойства оксидов", международный междисциплинарный симпозиум(20 ; 2017 ; 5-10 сент. / Ростов-на-Дону / Южный, Ростовская обл.); "Order, Disorder and Properties of Oxides", International meeting(20 ; 2017 г. ; sent. ; 5-10 / Rostov-on-Don / Yuzhny, Russia)
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Semenov, S. V.
Temperature behavior of the magnetoresistance hysteresis in a granular high-temperature superconductor: Magnetic flux compression in the intergrain medium / S. V. Semenov, D. A. Balaev // Physica C. - 2018. - Vol. 550. - P. 19-26, DOI 10.1016/j.physc.2018.04.005. - Cited References: 56. - The work was supported by the Russian Science Foundation (Grant No. 17-72-10050 ). . - ISSN 0921-4534
Кл.слова (ненормированные):
Barium compounds -- Copper compounds -- Grain boundaries -- Hysteresis -- Magnetic flux -- Magnetic moments -- Magnetization -- Magnetoresistance -- Yttrium barium copper oxides
Аннотация: Granular high-temperature superconductors (HTSs) are characterized by the hysteretic behavior of magnetoresistance. This phenomenon is attributed to the effective field in the intergrain medium of a granular HTS. At the grain boundaries, which are, in fact, weak Josephson couplings, the dissipation is observed. The effective field in the intergrain medium is a superposition of the external field and the field induced by magnetic moments of HTS grains. Meanwhile, analysis of the field width of the R(H) magnetoresistance hysteresis ΔH = Hdec − Hinc at Hdec = const, where Hinc and Hdec are increasing and decreasing branches of the R(H) hysteretic dependence, shows that the effective field in the intergrain medium exceeds by far both the external field and the field induced by magnetic moments of HTS grains. This situation suggests the magnetic flux compression in the intergrain medium because of the small length of grain boundaries, which amounts to ∼1 nm, i.e., is comparable with the coherence length and corresponds to Josephson tunneling in HTS materials. In this work, using the previously developed approach, we examine experimental data on the magnetoresistance and magnetization hysteresis in the granular YBa2Cu3O7 HTS compound in the range from 77 K to the critical temperature. According to the results obtained, the degree of magnetic flux compression determined by the parameter α in the expression for the effective field Beff(H) = H − 4π M(H) α in the intergrain medium remains constant over the investigated temperature range. All the features of the observed evolution of the R(H) hysteretic dependences are explained well within the proposed approach when the expression for Beff(H) contains the experimental M(H) magnetization data and the parameter α of about 20–25. The latter is indicative of the dominant effect of magnetic flux compression in the intergrain medium on the transport properties of granular HTS materials.

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

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Семенов, Сергей Васильевич
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Crystal formation of Cu-Mn-containing oxides and oxyborates in bismuth-boron fluxes diluted by MoO3 and Na2CO3 / E. Moshkina [et al.] // J. Cryst. Growth. - 2018. - Vol. 503. - P. 1-8, DOI 10.1016/j.jcrysgro.2018.09.011. - Cited References: 26. - This study was supported by Russian Foundation for Basic Research (RFBR) according to the research project No. 17-02-00953 A. . - ISSN 0022-0248
Кл.слова (ненормированные):
Characterization -- Growth from solutions -- Single crystal growth -- Manganites -- Magnetic materials
Аннотация: The high-temperature crystallizing phases of fluxes (molten solutions) based on Bi2O3:MoO3 = 1:3 and diluted by Na2CO3 and B2O3 (under varying of Na2CO3:B2O3), and by CuO and Mn2O3 (0 ≤ Mn2O3:CuO ≤ 5) are studied. The conditions of the stable crystallization of Mn2+1−xCuxMoO4, Mn23+O3, Mn2+Mn23+O4, Mn2+1−xCuxMn3+BO4 and Mn2+2−xCuxMn3+BO5 have been found. The influence of MoO3 and Na2CO3 to the crystallization processes of Mn2+- and Mn3+-containing Mn2+1−xCuxMoO4 and Mn2+Mn23+O4 and Mn23+O3 are clarified. The occurrence of the chemical bonds of these types at the crystallization of Mn-heterovalent Mn2+1−xCuxMn3+BO4 and Mn2+2−xCuxMn3+BO5 oxyborates is studied. Single crystal growth techniques of these oxyborates are suggested. The results of the structural and magnetic characterization of some discussed compounds are presented.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, 660037, Russian Federation
V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk, 630090, Russian Federation
Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Seryotkin, Y.; Bovina, A. F.; Бовина, Ася Федоровна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Eremin, E. V.; Еремин, Евгений Владимирович; Belskaya, N.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
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Study of iron oxide magnetic nanoparticles obtained via pulsed laser ablation of iron in air / V. A. Svetlichnyi [et al.] // Appl. Surf. Sci. - 2018. - Vol. 462. - P. 226-236, DOI 10.1016/j.apsusc.2018.08.116. - Cited References: 29. - This study was supported by Russian Science Foundation (RSF), Project # 18-19-00268. . - ISSN 0169-4332
Кл.слова (ненормированные):
Pulsed laser ablation in air -- Iron oxides -- Nanostructures -- Magnetic properties -- Thermal transformation
Аннотация: Magnetic nanoparticles were obtained using the nanosecond pulsed laser ablation (Nd:YAG laser, 1064 nm, 7 ns) of an iron target in air at atmospheric pressure. The particles obtained were further annealed at four different temperatures. The composition, structure and properties of all obtained powders were investigated using X-ray diffraction (XRD), DSC, attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR), Raman spectroscopy, TEM, SAED and other techniques. The initial sample was found to contain monoclinic magnetite and iron nitrides. Presumably, magnetite presents in the form of spherical particles with the distribution maximum of 12–15 nm, and nitrides take the form of lamellas and rolls. Thermal treatment of the sample led to particle enlargement and phase transformations, first, to cubic magnetite, then to a Fe3O4, α-Fe2O3 and γ-Fe2O3 mixture, and finally to the pure hematite phase. Zeta-potential, BET surface area and magnetic properties changed with the annealing as well. The obtained materials exhibited different properties that make them in demand in different fields, from biomedicine to technology.

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Держатели документа:
Siberian Physical-Technical Institute of Tomsk State University, Novosobornaya sq., 1, Tomsk, 634050, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Svetlichnyi, V. A.; Shabalina, A. V.; Lapin, I. N.; Goncharova, D. A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович
}
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Localization and transfer of charge carriers in CuO nanopowder by impedance spectroscopy / A. A. Lepeshev [et al.] // J. Mater. Sci.: Mater. Electron. - 2018. - Vol. 29, Is. 14. - P. 12118–12125, DOI 10.1007/s10854-018-9319-2. - Cited References: 26. - The work was performed with a support of the Grant of the Russian Science Foundation (Project No. 16-19-10054). . - ISSN 0957-4522
Кл.слова (ненормированные):
Copper oxides -- Electric charge -- Electric fields -- Electrodes -- Metal nanoparticles -- Permittivity -- Spectroscopy
Аннотация: Particular electro-physical characteristics of CuO nanopowder were investigated by impedance spectroscopy using a sensor based on interdigitated structure in the frequency range from 1 Hz to 100 MHz. The results of investigation were considered. Simulation of impedance spectra by equivalent electric circuits was carried out for numerical approximations of the frequency dependences of the dielectrical permittivity and conductivity. Electric charge accumulation of on the boundaries of nanoparticles and near the metal electrodes of the sensor was revealed. It was shown that a double electric layer is formed near the electrodes, which leads to the appearance of anomalously large values of dielectrical permittivity and an increase in the conductivity in the low-frequency region. The obtained results can be explained by proton conductivity in the nanopowder caused by moisture which is adsorbed on the surface of the nanoparticles. It was shown that after high-temperature annealing of CuO nanopowders, accumulation of electric charges was not observed. It was established that hopping or polaron conductivity occurs in the annealed CuO samples, which increases with increasing electric field frequency according to the power law with a fractional exponent.

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Держатели документа:
Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Science, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Siberian Branch, Kirensky Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Lepeshev, A. A.; Drokin, N. A.; Дрокин, Николай Александрович; Ushakov, A. V.; Karpov, I. V.; Fedorov, L. Y.; Bachurina, E. P.
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    Inhomogeneity of the magnetic state in the Pr1-xSrxMnO3/YSZ films studied by electron magnetic resonance / Yu. E. Samoshkina [et al.] // Int. Workshop on Phase Transit. and Inhomogeneous States in Oxides : book of abstracts / чл. орг. ком. I. N. Flerov. - Kazan, 2017. - P. 29. - Библиогр.: 4. - The work was supported by the Russian Foundation for Basic Researches, Grant No. 16-32-00209 mol_a and the Grant of the President of the Russian Federation no. NSh-7559.2016.2
   Перевод заглавия: Неоднородность магнитных состояний в Pr1-xSrxMnO3/YSZ пленках, изученная с помощью электронного магнитного резонанса

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Доп.точки доступа:
Flerov, I. N. \чл. орг. ком.\; Флёров, Игорь Николаевич; Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Andreev, N. V.; Андреев Н. В.; Chichkov, V. I.; Чичков В.И.; International Workshop on Phase Transitions and Inhomogeneous States in Oxides(2017 ; june ; 25-30 ; Kazan); "Фазовые переходы и неоднородные состояния в оксидах", международный семинар(2017 ; июнь ; 25-30 ; Казань)
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Effect of cation ordering on a-sites on the physical properties of substituted rare-earth cobaltite oxides GD1-XSRXCOO3-Δ / V. A. Dudnikov [et al.] // Moscow International Symposium on Magnetism (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 4PO-I-48. - P. 878

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Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Gavrilkin, S. Yu.; Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Solovyov, L. A.; Соловьев, Леонид Александрович; Vereshchagin, S. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
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10.

    Верещагин, С. Н.
    Изучение фазового перехода порядок-беспорядок в нестехиометрическом Sr-Gd-кобальтате методами ДСК, ТГ и РСА / С. Н. Верещагин, В. А. Дудников, Л. А. Соловьев // Журн. СФУ. Сер. "Химия". - 2016. - Т. 9, № 3. - С. 326-336 ; J. Sib. Fed. Univ. Chem., DOI 10.17516/1998-2836-2016-9-3-326-336. - Библиогр.: 26. - Исследование выполнено при финансовой поддержке Российского фонда фундаментальных исследований, Правительства Красноярского края, Красноярского краевого фонда поддержки научной и научно-технической деятельности в рамках научного проекта 16-43-240505 «р_а». . - ISSN 1998-2836. - ISSN 2313-6049
   Перевод заглавия: DSC+TG and XRD study of order-disorder transition in nonstoichiometric Sr-Gd-cobaltate
Рубрики:
PEROVSKITE-TYPE OXIDES
   PHASE-TRANSITION
   OXYGEN SORPTION
   PERFORMANCE
Кл.слова (ненормированные):
perovskite -- order-disorder -- phase transition -- DSC -- перовскит -- порядок-беспорядок -- фазовый переход -- ДСК
Аннотация: Методами термического и рентгеноструктурного анализа в интервале температур 11001473 К изучен процесс взаимопревращения тетрагонального перовскита Sr ( 0.8 ) Gd ( 0.2 ) CoO ( 3-d ) с упорядоченным расположением катионов Sr/Gd и анионных вакансий в кубическую разупорядоченную модификацию. Показано, что фазовое превращение протекает как размытый фазовый переход первого рода. Процесс разупорядочения не зависит от скорости нагрева и контролируется термодинамическими характеристиками процессов в кристалле, тогда как процесс образования упорядоченной тетрагональной структуры контролируется кинетическими факторами. Проведен количественный анализ температурной зависимости теплоемкости на основе размытых фазовых переходов.
Process of interconversion of tetragonal Sr(0.8) Gd(0.2) CoO(3-d) (with ordered Sr/Gd cations and anion vacancies) to cubic one (with disordered structure) was studied by X-ray structural and thermal analysis at 1100-1473 K. It was shown that the transformation is a first order diffuse phase transition. The ramp rate does not affect cation and anion vacancies disordering which is controlled by thermodynamic parameters of the processes in the solid whereas cubic to tetragonal transition is kinetically controlled. A theory of diffuse phase transition was applied to quantitatively analyze heat capacity temperature dependence.

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Держатели документа:
Институт химии и химической технологии СО РАН
Институт физики им. Л. В. Киренского СО РАН

Доп.точки доступа:
Дудников, Вячеслав Анатольевич; Dudnikov, V. A.; Соловьев, Леонид Александрович; Solovyov L. A.; Vereshchagin S. N.

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11.

    The investigation of the influence of oxygen concentration in the gas mixture on nanodispersed oxides synthesis / I. V. Karpov [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. - 2017. - Vol. 255, Is. 1. - Ст. 012008, DOI 10.1088/1757-899X/255/1/012008. - Cited References: 25
   Перевод заглавия: Исследование влияния концентрации кислорода в газовой смеси на синтез нанодисперсных оксидов
Кл.слова (ненормированные):
Cathodes -- Electrodes -- Particle size -- Vacuum applications -- Average particle size -- Cathode process -- Discharge gaps -- Energy of ions -- Influence of oxygen -- Low pressure arc -- Oxides synthesis -- Superheated gas -- Gases
Аннотация: Thermal effects in cathode space of low-pressure arc discharge, which contribute to the synthesis of nanopowders with an average particle size of less than 10 nm, are considered. One of the most important parameters, characterizing the cathode processes of vacuum arc, is a voltage drop across the discharge gap. All the gases demonstrate a decrease of a voltage drop across the discharge gap under the condition ofincreasing the gas pressure in the range of p = 10-3 - 1 Pa. Dissipation of energy of ions and electrons on gas molecules causes abrupt heating of the gas. Heat, coming from gas plasma, has a significant impact on evaporating material of a cathode. It can be assumed that a microdrop fraction, formed as a result of a cathode spraying in a liquid phase, will further evaporate in a superheated gas.

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Karpov, I. V.; Ushakov, A. V.; Lepeshev, A. A.; Лепешев, Анатолий Александрович; Fedorov, L. Y.; Dorozhkina, E. A.; Karpova, O. N.; Shaikhadinov, A. A.; Demin, V. G.; Bachurina, E. P.; Lichargin, D. V.; Abkaryan, A. K.; Zeer, G. M.; Зеер Г.М.; Zharkov, S. M.; Жарков, Сергей Михайлович; International Scientific Conference Reshetnev Readings(20 ; 2016 ; Nov. 9-12 ; Krasnoyarsk)
}
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12.

    The influence of magnetic field on the rate of cathode erosion at vacuum arc spraying / I. V. Karpov [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. - 2017. - Vol. 255, Is. 1. - Ст. 012007, DOI 10.1088/1757-899X/255/1/012007. - Cited References: 27
   Перевод заглавия: Влияние магнитного поля на скорость эрозии катода при дуговом распылении в вакууме
Кл.слова (ненормированные):
Cathodes -- Copper compounds -- Electrodes -- Magnetic fields -- Magnetism -- Metals -- Vacuum applications -- Vacuum technology -- Cathode erosion -- Influence of magnetic field -- Metal oxides -- Nano powders -- Particular condition -- Vacuum arcs -- Magnetoplasma
Аннотация: The influence of the magnetic field in the cathode space on the synthesis of metal oxide nanopowders by vacuum-arc spraying was studied. It was found that, depending on the geometry of the magnetic field and the pressure of gaseous medium in plasma-chemical reactor, particular conditions which enhance the efficiency of CuO synthesis, appear.

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Доп.точки доступа:
Karpov, I. V.; Ushakov, A. V.; Lepeshev, A. A.; Лепешев, Анатолий Александрович; Fedorov, L. Y.; Dorozhkina, E. A.; Karpova, O. N.; Shaikhadinov, A. A.; Demin, V. G.; Bachurina, E. P.; Lichargin, D. V.; Abkaryan, A. K.; Zeer, G. M.; Зеер Г.М.; Zharkov, S. M.; Жарков, Сергей Михайлович; International Scientific Conference Reshetnev Readings(20 ; 2016 ; Nov. 9-12 ; Krasnoyarsk)
}
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13.

    Structure, electrical and magneto-optical properties of Al co-doped Zn0.95-XCo0.05O thin films prepared by rf magnetron sputtering / В. Г. Мягков [и др.] // 20-й Междунар. симп. "Порядок, беспорядок и свойства оксидов" (ODPO-20) : труды симпозиума. - 2017. - Вып. 20, Т. 1. - С. 241-243. - Библиогр.: 5 назв.
   Перевод заглавия: Структурные, электрические и магнито-оптические свойства Al допированных Zn0.95-XCo0.05O тонких пленок, полученных высокочастотным магнетронным распылением
Аннотация: Мы представляем первые наблюдения большой вращающейся магнитной анизотропии в магнитотвёрдых пленках MnBi, полученных твердофазной реакций в Mn/Bi/Mn пленочных системах. После отжига при 270°С образцы содержали преимущественно α-MnBi, эпитаксиально сросшиейся с фазой Mn1.08Bi. В полученных образцах обнаружена большая вращающаяся магнитная анизотропия, легкую ось которой можно вращаться в полях, превышающих коэрцитивную силу, как в плоскости, так и перпендикулярно плоскости образца. Мы полагаем, что большая вращающаяся магнитная анизотропия является результатом эпитаксиального срастания магнитотвёрдой α-MnBi и магнитомягкой Mn1.08Bi фаз.
We present the first observations of high rotatable magnetic anisotropy in hard magnetic MnBi polycrystalline films, obtained by a solid state reaction in Mn/Bi/Mn films. After annealing at 270°C, the samples contained nanoclusters with the dominating α-MnBi phase epitaxially intergrown with the Mn1.08Bi phase. A high rotatable magnetic anisotropy, whose easy axis can be rotated in fields exceeding the coercivity in the plane and perpendicular to the sample plane, was found in the prepared samples. We suppose that high rotatable magnetic anisotropy is a result of the epitaxial intergrowth of the hard magnetic α-MnBi phase with the Mn1.08Bi phase.

Материалы конференции
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Samoshkina, Yu. E.; Самошкина, Юлия Эрнестовна; Edelman, I. S.; Эдельман, Ирина Самсоновна; Sokolov, A.Е.; Соколов, Алексей Эдуардович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Chou, H.; Южный федеральный университет; "Порядок, беспорядок и свойства оксидов", международный междисциплинарный симпозиум(20 ; 2017 ; 5-10 сент. / Ростов-на-Дону / Южный, Ростовская обл.); "Order, Disorder and Properties of Oxides", International meeting(20 ; 2017 г. ; sent. ; 5-10 / Rostov-on-Don / Yuzhny, Russia)
}
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14.

    Thermoelectric properties and stability of the Re0.2Sr0.8CoO3-δ (Re = Gd, Dy) complex cobalt oxides in the temperature range of 300‒800 K / V. A. Dudnikov [et al.] // Ceram. Int. - 2019. - Vol. 45, Is. 5. - P. 5553-5558, DOI 10.1016/j.ceramint.2018.12.013. - Cited References: 38. - This study was supported by the Russian Science Foundation , project no. 16-13-00060 , Russia . - ISSN 0272-8842
   Перевод заглавия: Термоэлектрические свойства и стабильность Re0.2Sr0.8CoO3-δ (Re = Gd, Dy) сложных оксидов кобальта в температурном интервале 300-800 К
Кл.слова (ненормированные):
Substituted rare earth cobalt oxides -- Thermoelectric oxide materials -- Ordered and disordered states
Аннотация: Temperature dependences of the electrical resistivity and Seebeck coefficient of the Re0.2Sr0.8CoO3‒δ (Re = Gd, Dy) complex cobalt oxides in the temperature range of 300 – 800 K have been investigated. The effects of ordering in the cation and anion sublattices on the thermoelectric properties has been examined and their comparative analysis has been made. It was found that, in the investigated temperature range, the thermoelectric power factor of the ordered compounds significantly exceeds the analogous parameter of the disordered samples. The temperature dependence of the electrical resistivity was shown to obey the activation law. As the temperature increases, the samples undergo a semiconductor-semiconductor electronic transition with a decrease in the activation energy. The thermoelectric properties of all the samples are shown to be stable in the investigated temperature range. The maximum thermoelectric power factor of the ordered Dy0.2Sr0.8CoO2.67 cobaltite at a temperature of 360 K has been obtained; it amounts to 0.23 µW/(cm·K2), which is a good parameter for this class of materials.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch”, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Institute of Engineering Physics and Radio Electronics, Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch”, Krasnoyarsk, 660036, Russian Federation
Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russian Federation

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Kazak, N. V.; Казак, Наталья Валерьевна; Fedorov, A. S.; Федоров, Александр Семенович; Solov'yov, L. A.; Vereshchagin, S. N.; Burkov, A. T.; Novikov, S. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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15.

Orlov, Yu. S.
Magnetic properties and spin crossover in transition metal oxides with d5 Ions at high pressures / Y. S. Orlov, S. V. Nikolaev, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2019. - Vol. 129, Is. 6. - P. 1062-1069, DOI 10.1134/S1063776119120185. - Cited References: 33. - This study was supported by the Russian Science Foundation (project no. 18-12-00022) . - ISSN 1063-7761
Кл.слова (ненормированные):
Antiferromagnetic materials -- Antiferromagnetism -- Chemical bonds -- Elasticity -- Electronic states -- Ferromagnetic materials -- Ferromagnetism -- Magnetic properties -- Paramagnetism -- Phase diagrams -- Transition metals
Аннотация: We analyze the influence of cooperative effects on the magnetic properties and spin crossover between the high-spin (HS) term S = 5/2 and low-spin (LS) term S = 1/2 in Mott–Hubbard dielectrics with 3d5 ions under high pressures. Two cooperation mechanisms (superexchange interaction and effective interaction via the elastic system) are considered. The sign of the exchange interaction changes because of the crossover from the antiferromagnetic in the HS state to the ferromagnetic in the LS state. In view of the large difference between the ionic radii of the HS and LS states, the systems with spin crossover acquire an additional strong coupling via the elastic system. Using the Hubbard operator representation and considering the electronic states of the two terms simultaneously, we obtain the effective Hamiltonian with allowance for the cooperative effects. The magnetic phase diagram and the spin crossover are investigated in the mean field approximation. It is shown that the inclusion of cooperative effects at low temperatures leads to a first-order phase transition between the antiferromagnetic HS state and the ferromagnetic LS state. At higher temperatures, more complicated sequences of phase transitions are possible upon an increase in pressure, including the HS paramagnet–HS antiferromagnet–LS paramagnet and HS antiferromagnet–LS paramagnet–LS ferromagnet transitions.

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Публикация на русском языке Орлов, Юрий Сергеевич. Магнитные свойства и спиновый кроссовер при высоких давлениях в окислах переходных металлов с d5-ионами [Текст] / Ю. С. Орлов, С. В. Николаев, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 2019. - Т. 156 Вып. 6. - С. 1165-1174

Исправлено Orlov Yu. S. Erratum to: Magnetic properties and spin crossover in transition metal oxides with d5 ions at high pressures [Текст] / Y. S. Orlov, S. V. Nikolaev, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2020. - Vol. 131 Is. 2.- P.374-374

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

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Орлов, Юрий Сергеевич
}
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16.

Bikbaev, R. G.
Transparent conductive oxides for the epsilon-near-zero Tamm plasmon polaritons: publisher's note (vol 36, pg 2817, 2019) / R. G. Bikbaev, S. Y. Vetrov, I. V. Timofeev // J. Opt. Soc. Am. B. - 2020. - Vol. 37, Is. 1. - P. 167-167, DOI 10.1364/JOSAB.385427. - Cited References: 1. - The reported study was funded by Russian Foundation for Basic Research project No. 18-32-00053 and by a joint project of the Russian Foundation for Basic Research, project no. 19-52-52006, and the Taiwan Ministry of Science and Technology, project no. 108-2923E-009-003-MY3 . - ISSN 0740-3224. - ISSN 1520-8540

РУБ Optics

Аннотация: This publisher’s note corrects the funding and acknowledgment sections in J. Opt. Soc. Am. B 36, 2817 (2019)

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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Бикбаев, Рашид Гельмединович; Russian Foundation for Basic Research Russian Foundation for Basic Research (RFBR) [19-52-52006, 18-32-00053]; Taiwan Ministry of Science and Technology [108-2923E-009-003-MY3]
}
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17.

Magnetic nanoconstructions of iron oxides coated with arabinogalactan functionalized with DNA aptamer / S. V. Stolyar [et al.] // J. Phys. Conf. Ser. - 2019. - Vol. 1399. - Ст. 022026, DOI 10.1088/1742-6596/1399/2/022026. - Cited References: 6 . - ISSN 1742-6588. - ISSN 1742-6596
Рубрики:
Applied Physics
Аннотация: New composite nanoparticles for biomedical applications have been manufactured. The particles consist of an anisomeric magnetite core coated with arabinogalactan and are functionalized with cameras for As-14 ascites cells (Ehrlich carcinoma). The binding of ascitic Ehrlich carcinoma cells to magnetic nanoparticles was evaluated using fluorescence microscopy.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS Krasnoyarsk, Russia
Krasnoyarsk State Medical University named after prof. V.F. Voino-Yasenecki, Krasnoyarsk, 660022, Russia
Astrakhan State University, Tatisheva 20 A, Astrakhan, 414056, Russia
College of Biotechnology, Al-Qasim Green University, Iraq

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Chekanova, L. A.; Чеканова, Лидия Александровна; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Bayukov, O. A.; Баюков, Олег Артемьевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Garanzha, I. V.; Kolovskaya, O. S.; Bairmani, M. Sh.; Zamay, T. N.; International Scientific Conference "Conference on Applied Physics, Information Technologies and Engineering"(25-27 September 2019 ; Krasnoyarsk, Russian Federation)
}
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18.

Thermoelectric properties of the SmCoO3 and NdCoO3 cobalt oxides / V. A. Dudnikov, A. S. Fedorov, Y. S. Orlov [et al.] // Ceram. Int. - 2020. - Vol. 46, Is. 11. - P. 17987-17991, DOI 10.1016/j.ceramint.2020.04.113. - Cited References: 41. - This study was supported by the Russian Science Foundation, project no. 16-13-00060. . - ISSN 0272-8842. - ISSN 1873-3956

РУБ Materials Science, Ceramics
Рубрики:
MAGNETIC-PROPERTIES
   SPIN
   CONDUCTIVITY
   TRANSITIONS
   LACOO3
   SITE
Кл.слова (ненормированные):
Perovskite -- Thermoelectric oxide materials
Аннотация: The thermoelectric properties of the NdCoO3 and SmCoO3 rare-earth cobalt oxides with a perovskite structure have been investigated in a wide temperature range. It is shown that, in the low-temperature region, the thermal conductivity of the compounds has a sharp maximum and the electrical conductivity of the samples increases with temperature, whereas the Seebeck coefficient behaves nonmonotonically with increasing temperature. The SmCoO3 oxide is characterized by the positive thermopower over the entire investigated range with a sharp growth in the low-temperature region, attaining the maximum value (S ≈ 1000 μV/K) near room temperature, and a further decrease. It has been established that, in the NdCoO3 oxide, the Seebeck coefficient changes its sign, which was rarely observed in the La-based compounds and is atypical of the undoped rare-earth cobalt oxides. The thermopower maximum obtained at a temperature of 450 K is 400 μV/K. The regions of the fastest growth of the thermoelectric power factor correspond to the anomalies caused by the spin transition of Со3+ ions and the dielectric–metal transition.

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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Ioffe Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Fedorov, A. S.; Федоров, Александр Семенович; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, L. A.; Vereshchagin, S. N.; Gavrilkin, S. Yu; Tsvetkov, A. Yu; Gorev, M. V.; Горев, Михаил Васильевич; Novikov, S., V; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science FoundationRussian Science Foundation (RSF) [16-13-00060]
}
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19.

Effect of multiplicity fluctuation in cobalt ions on crystal structure, magnetic and electrical properties of NdCoO3 and SmCoO3 / V. A. Dudnikov, Y. S. Orlov, L. A. Solovyov [et al.] // Molecules. - 2020. - Vol. 25, Is. 6. - Ст. 1301, DOI 10.3390/molecules25061301. - Cited References: 56. - This work is supported by the Russian Science Foundation grant 18-02-00022. . - ISSN 1420-3049

РУБ Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
SPIN-STATE TRANSITIONS
   CO3+ ION
   CONDUCTIVITY
   TEMPERATURE
   BEHAVIOR
Кл.слова (ненормированные):
rare-earth cobalt oxides -- multiplicity fluctuations -- structural -- magnetic -- electrical -- and dilatation properties
Аннотация: The structural, magnetic, electrical, and dilatation properties of the rare-earth NdCoO3 and SmCoO3 cobaltites were investigated. Their comparative analysis was carried out and the effect of multiplicity fluctuations on physical properties of the studied cobaltites was considered. Correlations between the spin state change of cobalt ions and the temperature dependence anomalies of the lattice parameters, magnetic susceptibility, volume thermal expansion coefficient, and electrical resistance have been revealed. A comparison of the results with well-studied GdCoO3 allows one to single out both the general tendencies inherent in all rare-earth cobaltites taking into account the lanthanide contraction and peculiar properties of the samples containing Nd and Sm.

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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr KSC, SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC, Inst Chem & Chem Technol, SB, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia.
Russian Acad Sci, Ioffe Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, Leonid A.; Vereshchagin, Sergey N.; Gavrilkin, Sergey Yu.; Tsvetkov, Alexey Yu.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gorev, M. V.; Горев, Михаил Васильевич; Novikov, Sergey V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science FoundationRussian Science Foundation (RSF) [18-02-00022]
}
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20.

Structural, magnetic, electronic, and dilatation properties of the ordered solid solutions Ln0.2Sr0.8CoO3-δ (Ln = Sm, Gd, Dy) with the same oxygen nonstoichiometry index δ / V. A. Dudnikov, Y. S. Orlov, M. V. Bushinsky [et al.] // J. Alloy. Compd. - 2020. - Vol. 830. - Ст. 154629, DOI 10.1016/j.jallcom.2020.154629. - Cited References: 44. - The work was financially supported by Russian Foundation for Basic Research (grant No. 19-03-00017); RFBR and BRFFR as a part of scientific project No. 18-52-00017 and project F18R-119; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project: "New thermoelectric materials based on multi-scale spatially inhomogeneous substituted rare-earth cobalt oxides and the Ruddlesden-Popper phases " project No. 18-42-243004, Project of Basic Research SB RAS V.45.3.3. . - ISSN 0925-8388. - ISSN 1873-4669

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
LN(1-X)SR(X)COO(3-DELTA) LN
COBALTATE PEROVSKITES
Кл.слова (ненормированные):
Rare earth cobalt oxide solid solutions -- Layered perovskite-type cobalt oxides -- Structural -- Magnetic -- Electronic -- Dilatation properties
Аннотация: Single-phase samples of the layered perovskite-like cobalt oxides Ln0.2Sr0.8CoO3-δ (Ln = Sm, Gd, Dy) with the same oxygen nonstoichiometry index δ = 0.37 ± 0.01 were synthesized. All samples are characterized by a tetragonal unit cell with the space group I4/mmm. The structural, magnetic, electric transport and dilatation properties of the obtained samples are investigated. The studied samples are characterized by two anomalies in magnetic properties, a high-temperature maximum near Тm = 350 К with magnetic field hysteresis below Tm, and a diffuse peak in the intermediate temperature range, which shifts with ionic radius decrease of the rare-earth element to higher temperatures. The high-temperature maxima of the magnetic susceptibility correlate with anomalies in thermal expansion, heat capacity and the features in the temperature dependences of the electrical resistivity, pointing to a strong relationship between the structural, magnetic and electronic degrees of freedom. The given comparative analysis of the experimental data of various substituting rare-earth elements with the same oxygen nonstoichiometry has been carried out for the first time.

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RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
RAS, Fed Res Ctr KSC SB, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.
Lebedev Phys Inst, Moscow 119991, Russia.
NAS Belarus, Sci Pract Mat Res Ctr, Minsk 220072, BELARUS.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Ioffe Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Bushinsky, M. V.; Solovyov, L. A.; Vereshchagin, S. N.; Gavrilkin, S. Yu; Tsvetkov, A. Yu; Gorev, M. V.; Горев, Михаил Васильевич; Novikov, S. V.; Mantytskaya, O. S.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-03-00017]; RFBRRussian Foundation for Basic Research (RFBR) [18-52-00017, F18R-119]; BRFFR [18-52-00017, F18R-119]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory [18-42-243004, SB RAS V.45.3.3]
}
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