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Pinning enhancement by heterovalent substitution in Y1−xRExBa2Cu3O7−δ / Petrov M.I., Gokhfeld Yu.S., Balaev D.A., Popkov S.I., Dubrovskiy A.A., Gokhfeld D.M., Shaykhutdinov K.A. // 25th International Conference on Low Temperature Physics (LT25). – Amsterdam, Netherlands. - August 6-13. – 2008. – PB-Tu130, p.304

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Gokhfeld, Yu. S.; Гохфельд, Ю. С.; Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович
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Reconfigurable millimeter-wave reflectarray based on low loss liquid crystals / D. Perez-Quintana, E. Aguirre, E. Olariaga [et al.] // IEEE Trans. Antennas Propag. - 2024. - Vol. 72, Is. 1. - P. 531-541, DOI 10.1109/TAP.2023.3329666. - Cited References: 36. - This work was funded by Project RTI2018-094475-B-I00 funded by MCIN/ AEI /10.13039/501100011033/ FEDER “Una manera de hacer Europa”; S.A.K. acknowledges support from the Ministry of Science and Higher Education of the Russian Federation, grant 075-15-2020-797 (13.1902.21.0024). The authors also thank the Shared Equipment Center “Spectroscopy and Optics” of the Institute of Automation and Electrometry SB RAS for THz-TDS characterization of quartz wafers . - ISSN 0018-926X. - ISSN 1558-2221
Аннотация: This paper reports on the development and evaluation of a reconfigurable millimeter-wave reflectarray based on liquid-crystal (LC) substrate operating in the D-band (105-125 GHz). The reflectarray is composed of a high-impedance surface with a meta-array of 33 × 29 patches on a 2-mm-thick quartz substrate, separated from the ground plane by a 40 μm-thick LC layer. A novel LC composition with low dielectric losses (˂ 0.003) and high dielectric anisotropy (˃ 1.3) has been developed for operation at millimeter-waves. The results demonstrate a reflection phase tunability of 210 degrees and low insertion losses of 2.5 dB. Furthermore, the device was demonstrated as a proof of concept for 1D beam-steering applications, exhibiting an operational bandwidth of 12 GHz.

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Держатели документа:
Antennas Group, Universidad Publica de Navarra, Pamplona, Spain
Institute of Smart Cities (ISC), Universidad Publica de Navarra, Pamplona, Spain
TAFCO METAWIRELESS., S.L., Berriozar, Spain
Novosibirsk State University, Novosibirsk, Russia
Institute of Applied Physical Problems, Minsk, Belarus
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Perez-Quintana, D.; Aguirre, E.; Olariaga, E.; Kuznetsov, S. A.; Lapanik, V. I.; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Marcotegui, J. A.; Beruete, M.
}
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Aksenov, S. V.
Majorana modes and Fano resonances in Aharonov–Bohm ring with topologically nontrivial superconducting bridge / S. V. Aksenov, M. Yu. Kagan // J. Low Temp. Phys. - 2024, DOI 10.1007/s10909-024-03171-5. - Cited References: 46. - We were inspired by Andreev’s seminal contribution in the superconducting nanophysics—the field which started in fact from Josephson effect and Andreev reflection. M. Yu. Kagan thanks the Program for basic research of the National Research University Higher School of Economics for support. The work was partially carried out within the state assignment of Kirensky Institute of Physics. S.V.A. thanks the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" for support . - Article in press. - ISSN 0022-2291. - ISSN 1573-7357
Кл.слова (ненормированные):
Topological superconductivity -- Majorana modes -- Aharonov–Bohm ring -- Fano resonanse
Аннотация: We study different resonances (first of all of the Fano type) in the interference device formed by the Aharonov–Bohm ring with superconducting (SC) wire in the topologically nontrivial state playing a role of a bridge between top and bottom arms. We analyze Majorana modes on the ends of the SC wire and show that the collapse of the additional Fano resonance, that is initially induced by transport scheme asymmetry, is connected with the increase of the length of the bridge when the binding energy of the Majorana end modes tends to zero. In local transport regime, the Fano resonances are stable against the change of the transport symmetry. The reasons of both collapse and sustainability are analyzed using a spinless toy model including the Kitaev chain.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, Russia, 660036
National Research University Higher School of Economics, Myasnitskaya Street 20, Moscow, Russia, 101000
P.L. Kapitza Institute for Physical Problems, Russian Academy of Sciences, Kosygin Street 2, Moscow, Russia, 119334

Доп.точки доступа:
Kagan, M. Yu.; Аксенов, Сергей Владимирович
}
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    Resistive switching properties of a nanostructured layer of mixed ZrO2 phases obtained in low-pressure arc discharge plasma / I. V. Karpov, L. Yu Fedorov, A. K. Abkaryan [et al.] // Vacuum. - 2024. - Vol. 227. - Ст. 113375, DOI 10.1016/j.vacuum.2024.113375. - Cited References: 34. - The work was performed with a support of the grant of the Russian Science Foundation (Project No. 24-29-00374, https://rscf.ru/project/24-29-00374/) . - ISSN 0042-207X. - ISSN 1879-2715
   Перевод заглавия: Резистивные коммутационные свойства наноструктурированного слоя смешанных фаз ZrO2, полученного в плазме дугового разряда низкого давления
Кл.слова (ненормированные):
Zirconium oxide -- Vacuum arc -- Physical vapor deposition -- Phase stability
Аннотация: The controlled vacuum-arc synthesis of zirconium dioxide (ZrO2) nanoparticles is considered, which makes it possible to regulate the percentage ratio of the monoclinic and tetragonal phases. The samples were characterized using XRD analysis, SEM, HRTEM analysis, FT-IR analysis, TG/DTA analysis and EPR spectroscopy. It has been established that the formation of the tetragonal phase is associated with the formation of a large number of oxygen vacancies formed due to high-speed quenching of nanoparticles. Reducing the operating gas pressure in a vacuum chamber from 180 Pa to 30 Pa makes it possible to obtain nanoparticles up to 2 nm in size. The synthesized ZrO2 nanoparticles do not contain foreign impurities and when heated, the weight loss is up to 7 %. The process of local resistive switching in the contact of an atomic force microscope (AFM) probe to a nanostructured ZrO(2-x) layer on a conducting substrate has been studied. Cyclic current-voltage characteristics demonstrate the existence of stable states of high and low resistance, switched by changing the polarity of the applied voltage. The coexistence of the m- and t-ZrO2 phases (and the resulting oxygen nonstoichiometry in the interboundary regions) provides conditions for the formation/destruction of a filament from oxygen vacancies, which determine the conductivity of the dielectric in the LRS state.

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Держатели документа:
Siberian Federal University, 660041, Krasnoyarsk, Russian Federation
Federal Research Center Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, 660036, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Karpov, I.V.; Fedorov, L. Yu; Abkaryan, A.K.; Zharkov, S. M.; Жарков, Сергей Михайлович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Nemtsev, I. V.; Немцев, Иван Васильевич; Irtyugo, L.A.
}
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Gavrichkov, V. A.
Doped Mott-Hubbard materials with a low quasiparticle transparency / V. A. Gavrichkov // Phys. Rev. B. - 2024. - Vol. 109, Is. 12. - Ст. 125139, DOI 10.1103/PhysRevB.109.125139. - Cited References: 48. - This work has been supported by the grant of the Russian Science Foundation, RSF 22-22-00298 . - ISSN 2469-9950. - ISSN 2469-9969
Аннотация: Based on the Wilson's criterion metal/insulator, extended to materials with strong electronic correlations, we have identified a specific class of the materials, which is not associated with their usual classification into Mott-Hubbard and charge transfer dielectrics. The local symmetry of these materials leads to the disappearance of quasiparticle states (so-called first removal or first extra states) in the Hubbard gap. It is especially unusual for doped materials, in which quasiparticles, being charge carriers, can disappear or appear under external factors without the Mott transition being achieved. In this work, we introduce the so-called “quasiparticle transparency”, and provide specific experiments to identify materials with the low quasiparticle transparency. A number of examples of such materials with a spin crossover under high pressure, showing the Jahn-Teller nature, are considered.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 660036 Krasnoyarsk, Russia
Rome International Center for Materials Science Superstripes RICMASS, via del Sabelli 119A, 00185 Roma, Italy

Доп.точки доступа:
Гавричков, Владимир Александрович
}
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Possible noncollinear magnetism and different valence state of manganese ions in quasi-low-dimensional ludwigites of (Ni,Cu,Mn)3BO5 / S. N. Sofronova, A. Veligzhanin, E. Eremin [et al.] // Phys. Status Solidi B. - 2023. - Vol. 260, Is. 5. - Ст. 2200457, DOI 10.1002/pssb.202200457. - Cited References: 30. - The equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” was used for measurements in this research. The authors thank E. Moshkina for providing the samples for the study. - Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activity. Grant Number: 20-42-240011 . - ISSN 0370-1972. - ISSN 1521-3951
Кл.слова (ненормированные):
exchange interactions -- ferrimagnetism -- ludwigites -- noncollinear magnetism
Аннотация: The content of transition-metal ions and their valence state for three compositions of NixCuyMn3−x−yBO5 are estimated by the methods of X-ray absorption spectroscopy. In all the three compositions, the copper content does not exceed 0.25. One of the compositions has manganese ions both in the trivalent and bivalent states according to the K-edge position. The calculations of the total energies of various cation-ordered structures using the software package Wien2K show that copper ions predominately occupy one site, namely, 2(2d). The measurements of the magnetic properties show two types of magnetic transitions in all the three compositions, with one of them being in the range of 60–75 K and the other one at 10 K. Based on the exchange interactions calculated in the framework of the empirical model, magnetic ordering temperatures are estimated for two- and three-sublattice structures and the magnetic transition in the range of 60–75 K is supposed to be connected with magnetic moment ordering in sites 2 and 3.

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Держатели документа:
Kirensky Institute of Physics Federal Research Center KSC SB RAS 660036 Krasnoyarsk, Russia
Kurchatov Specialized Source of Synchrotron Radiation “KISI-Kurchatov” National Research Centre “Kurchatov Institute” 123182 Moscow, Russia

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Veligzhanin, Aleksey; Eremin, E. V.; Еремин, Евгений Владимирович; Chernyshev, A. V.; Чернышов, Артем Валерьевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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Low-temperature deformation and fracture of Cr-Mn-N stainless steel: Tensile and impact bending tests / N. Narkevich, I. Vlasov, M. Volochaev [et al.] // Metals. - 2023. - Vol. 13, Is. 1. - Ст. 95, DOI 10.3390/met13010095. - Cited References: 41. - The research was funded by RSF, project No. 22-29-00438. The low-temperature tensile tests were carried out in accordance with the state assignment for the ISPMS SB RAS, project No. FWRW-2021-0009 . - ISSN 2075-4701
Кл.слова (ненормированные):
high-nitrogen steel -- austenite -- tensile test -- impact bending test -- ductile-to-brittle transition -- internal stresses -- fracture
Аннотация: The paper presents the results of tensile and impact bending tests of 17%Cr-19%Mn-0.53%N high-nitrogen austenitic stainless steel in temperatures ranging from −196 to 20 °C. The steel microstructure and fracture surfaces were investigated using transmission and scanning electron microscopes, as well as X-ray diffraction analysis. The steel experiences a ductile-to-brittle transition (DBT); however, it possessed high tensile and impact strength characteristics, as well as the ductile fracture behavior at temperatures down to −114 °C. The correspondence between γ–ε microstructure and fracture surface morphologies was revealed after the tensile test at the temperature of −196 °C. In this case, the transgranular brittle and layered fracture surface was induced by ε-martensite formation. Under the impact bending test at −196 °C, the brittle intergranular fracture occurred at the elastic deflection stage without significant plastic strains, which preceded a failure due to the high internal stresses localized at the boundaries of the austenite grains. The stresses were induced by: (i) segregation of nitrogen atoms at the grain boundaries and in the near-boundary regions, (ii) quenching stresses, and (iii) reducing fcc lattice volume with the test temperature decrease and incorporation of nitrogen atoms into fcc austenite lattice. Anisotropy of residual stresses was revealed. This was manifested in the localization of elastic deformations of the fcc lattice and, consequently, the stress localization in <100>-oriented grains; this is suggested to be the reason of brittle cleavage fracture.

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Держатели документа:
Laboratory of Physical Mesomechanics of Materials and Non-Destructive Testing, Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055, Russian Federation
Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation
Laboratory of Shape Memory Alloys, Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055, Russian Federation
School of Advanced Manufacturing Technologies, National Research Tomsk Polytechnic University, Tomsk, 634030, Russian Federation
Department of Mechanical and Aerospace Engineering, SAPIENZA-Universita Di Roma, Roma, 00184, Italy

Доп.точки доступа:
Narkevich, N.; Vlasov, I.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Gomorova, Y.; Mironov, Y.; Panin, S.; Berto, F.; Maksimov, P.; Deryugin, E.
}
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Magnetic properties of NaNiFe2(VO4)3 compound at low temperatures / T. V. Drokina, O. A. Bayukov, D. A. Velikanov [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 2. - P. 255-259, DOI 10.21883/PSS.2023.02.55409.510. - Cited References: 16 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
multicomponent vanadates -- magnetic properties -- spin disorder
Аннотация: In the low temperature region, a change in the magnetic state was detected in the new NaNiFe2(VO4)3 magnetic compound, confirmed by the results of experimental study by gamma resonance and magnetometry methods. The formation of disordered magnetism in multicomponent vanadate is facilitated by the features of the crystal structure, in which magnetically active cations occupy several crystallographically non-equivalent mixed positions with uneven filling with iron and nickel ions.

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Публикация на русском языке Магнитные свойства соединения NaNiFe2(VO4)3 при низких температурах [Текст] / Т. В. Дрокина, О. А. Баюков, Д. А. Великанов [и др.] // Физ. тверд. тела. - 2023. - Т. 65 Вып. 2. - С. 263-267

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Drokina, T. V.; Дрокина, Тамара Васильевна; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Freydman, A. L.; Фрейдман, Александр Леонидович; Petrakovsky, G. A.; Петраковский, Герман Антонович
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The low-temperature germinating spores of the thermophilic Desulfofundulus contribute to an extremely high sulfate reduction in burning coal seams / O. V. Karnachuk, I. I. Rusanov, I. A. Panova [et al.] // Front. Microbiol. - 2023. - Vol. 14. - Ст. 1204102, DOI 10.3389/fmicb.2023.1204102. - Cited References: 80. - This study was supported by the Russian Science Foundation Projects 21-14-00114 (to OK, sampling, sulfate reduction rate measurements, pure culture isolation and physiological experiments with pure culture and spores) and 22-14-00178 (to NR, metagenome and genome sequencing and analysis) and the Ministry of Science and Higher Education of the Russian Federation . - ISSN 1664-302X
Кл.слова (ненормированные):
sulfate reduction -- thermophiles -- burning coal seams -- Desulfofundulus -- spores
Аннотация: Burning coal seams, characterized by massive carbon monoxide (CO) emissions, the presence of secondary sulfates, and high temperatures, represent suitable environments for thermophilic sulfate reduction. The diversity and activity of dissimilatory sulfate reducers in these environments remain unexplored. In this study, using metagenomic approaches, in situ activity measurements with a radioactive tracer, and cultivation we have shown that members of the genus Desulfofundulus are responsible for the extremely high sulfate reduction rate (SRR) in burning lignite seams in the Altai Mountains. The maximum SRR reached 564 ± 21.9 nmol S cm−3 day−1 at 60°C and was of the same order of magnitude for both thermophilic (60°C) and mesophilic (23°C) incubations. The 16S rRNA profiles and the search for dsr gene sequences in the metagenome revealed members of the genus Desulfofundulus as the main sulfate reducers. The thermophilic Desulfofundulus sp. strain Al36 isolated in pure culture, did not grow at temperatures below 50°C, but produced spores that germinated into metabolically active cells at 20 and 15°C. Vegetative cells germinating from spores produced up to 0.738 ± 0.026 mM H2S at 20°C and up to 0.629 ± 0.007 mM H2S at 15°C when CO was used as the sole electron donor. The Al36 strain maintains significant production of H2S from sulfate over a wide temperature range from 15°C to 65°C, which is important in variable temperature biotopes such as lignite burning seams. Burning coal seams producing CO are ubiquitous throughout the world, and biogenic H2S may represent an overlooked significant flux to the atmosphere. The thermophilic spore outgrowth and their metabolic activity at temperatures below the growth minimum may be important for other spore-forming bacteria of environmental, industrial and clinical importance.

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Держатели документа:
Laboratory of Biochemistry and Molecular Biology, Tomsk State University, Tomsk, Russia
Institute of Microbiology, Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
Institute of Bioengineering, Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
Kirensky Institute of Physics, Krasnoyarsk, Russia

Доп.точки доступа:
Karnachuk, O. V.; Rusanov, I. I.; Panova, I. A.; Kadnikov, V. V.; Avakyan, M. R.; Ikkert, O. P.; Lukina, A. P.; Beletsky, A. V.; Mardanov, A. V.; Knyazev, Yu. V.; Князев, Юрий Владимирович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Pimenov, N. V.; Ravin, N. V.
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10.

    Low-temperature phase transitions in ANLT4.5 ceramics / A. N. Vtyurin, A. S. Krylov, S. N. Krylova [et al.] // Materials Science and Nanotechnology (MSN-2023) : abstract book of International conference / Ural Federal University; org. com. A. N. Vtyurin et al. - Ekaterinburg, 2023. - Ст. 117. - P. 28. - Cited References: 5 . - ISBN 978-5-9500624-6-9
   Перевод заглавия: Низкотемпературные фазовые переходы в керамике ANLT4.5

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Держатели документа:
Kirensky Institute of Physics SB RAS
Siberian Federal University
Ioffe Physical-Technical Institute RAS
Intl. Center for Dielectric Research, Xi'an Jiaotong University, 710049, Xi'an, China

Доп.точки доступа:
Vtyurin, A. N. \org. com.\; Втюрин, Александр Николаевич; Vtyurin, A. N.; Krylov, A. S.; Крылов, Александр Сергеевич; Krylova, S. N.; Крылова, Светлана Николаевна; Roginskii, E. M.; Li, J.; Tian, Y.; Wei, X.; Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина; Ural Federal University; "Materials science and nanotechnology", International conference(2023 ; Aug. 27-30 ; Ekaterinburg)
}
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