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    Беляев, Борис Афанасьевич.
    Исследование оптических резонаторов и полосно-пропускающих фильтров на структурах из чередующихся слоев кварца и серебра / Б. А. Беляев, В. В. Тюрнев, Д. А. Шабанов // Изв. вузов. Физика. - 2025. - Т. 68, № 1. - С. 76-89, DOI 10.17223/00213411/68/1/9. - Библиогр.: 24. - Работа выполнена в рамках научной тематики Госзадания Института физики им. Л.В. Киренского ФИЦ КНЦ СО РАН . - ISSN 0021-3411
   Перевод заглавия: Investigation of optical resonators and bandpass filters on structures made of alternating layers of quartz and silver
Кл.слова (ненормированные):
слоистая металлодиэлектрическая структура -- полосно-пропускающий фильтр -- комплексная относительная диэлектрическая проницаемость -- layered metal-dielectric structure -- bandpass filter -- the complex permittivity
Аннотация: Исследованы характеристики планарного оптического резонатора из кварцевого стекла, окруженного серебряными зеркалами, при изменении их толщины. Измерены амплитудно-частотные характеристики полосно-пропускающих фильтров на планарных структурах, полученных вакуумным напылением на подложки из кварцевого стекла (SiO2) трех слоев также из кварца, являющихся полуволновыми резонаторами, разделенными друг от друга, от подложки и от свободного пространства четырьмя слоями из серебра (Ag). Толщины слоев Ag и SiO2 определялись по заданным параметрам полосы пропускания фильтров синтезом одномерных моделей с использованием электродинамического анализа. При этом учитывались экспериментальные частотные зависимости действительной и мнимой частей комплексной диэлектрической проницаемости серебра. Измеренные амплитудно-частотные характеристики изготовленных опытных образцов фильтров красного, зеленого и фиолетового цветов хорошо согласуются с характеристиками, полученными при синтезе. Проведены систематические исследования фильтров с центральной частотой полосы пропускания 300 ТГц (длина волны 1 мкм) и относительной ее шириной 2-20%, содержащих от 3 до 6 резонаторов. Высокие характеристики разработанных фильтров показывают перспективность их использования в оптических устройствах.
The characteristics of a planar optical resonator made of quartz glass surrounded by silver mirrors were studied as their thickness varied. The frequency responses of bandpass filters were measured on planar structures obtained by vacuum deposition on quartz glass (SiO2) substrates of three quartz layers, which are half-wavelength resonators separated by four silver (Ag) layers from each other, from the substrate, and from free space. The thicknesses of the Ag and SiO2 layers were determined based on the specified parameters of the filter passband by synthesizing one-dimensional models using electrodynamic analysis. The experimental frequency dependences of the real and imaginary parts of the complex permittivity of silver were taken into account. The measured frequency responses of the manufactured prototypes of red, green, and purple filters are in good agreement with the characteristics obtained during synthesis. Systematic studies of filters with a central bandwidth frequency of 300 THz (wavelength of 1 µm) and a relative width of 2-20%, containing from 3 to 6 resonators, have been carried out. The high performance of the developed filters shows the prospects of their use in optical devices.

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Держатели документа:
Сибирский государственный университет науки и технологий им. М.Ф. Решетнева, г. Красноярск, Россия
Сибирский федеральный университет, г. Красноярск, Россия
Институт физики им. Л.В. Киренского ФИЦ КНЦ СО РАН, г. Красноярск, Россия

Доп.точки доступа:
Тюрнев, Владимир Вениаминович; Tyurnev, V. V.; Шабанов, Дмитрий Александрович; Shabanov, D. A.; Belyaev, B. A.
}
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Kovaleva, E. A.
Time-dependent DFT-based study of bacteriochlorophyll a optical properties within the B800 part of LH2 Rhodoblastus acidophilus light-harvesting complex / E. A. Kovaleva, L. V. Begunovich, M. M. Korshunov // J. Photochem. Photobiol. A: Chem. - 2025. - Vol. 468. - Ст. 116489, DOI 10.1016/j.jphotochem.2025.116489. - Cited References: 41. - We thank V.F. Shabanov for useful discussions. This work was supported by the state assignment of the Ministry of Science and Higher Education of the Russian Federation. Authors would like to thank Information Technology Centre, Novosibirsk State University for providing access to their supercomputers. L.V.B. would like to thank Irkutsk Supercomputer Center of SB RAS for providing the access to HPC-cluster «Akademik V.M. Matrosov» (Irkutsk Supercomputer Center of SB RAS, Irkutsk: ISDCT SB RAS; http://hpc.icc.ru) . - ISSN 1010-6030. - ISSN 1873-2666
Кл.слова (ненормированные):
Light-harvesting complex -- Purple bacteria -- DFT -- DFTB -- TD-DFT -- Optical absorption spectra
Аннотация: Optical absorption of B800 part of Rhodoblastus acidophilus light-harvesting complex 2 (LH2) and its constituent bacteriochlorophyll a molecule was studied using time-dependent density functional theory-based approaches. We proved the absence of any sizable effects originating from the interaction between adjacent molecules, thus optical features of B800 LH2 part should not be attributed to the structural organization of pigments. In addition, time-dependent procedure itself was found to be crucial for the correct description of bacteriochlorophyll a absorption spectrum.

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Держатели документа:
Federal Research Center Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Begunovich, L. V.; Korshunov, M. M.; Коршунов, Максим Михайлович
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Optical properties, structural homogeneity, and defect centers of double-doped LiNbO3:Zn:Mg single crystals obtained using different technologies / R. A. Titov, M. V. Smirnov, L. A. Bobreva [et al.] // Inorg. Mater.: Appl. Res. - 2025. - Vol. 16, Is. 2. - P. 278-290, DOI 10.1134/S2075113324701648. - Cited References: 60. - This work was carried out with partial financial support from the Government of the Murmansk Region for research projects of young scientists (no. 201 dated November 27, 2023) and within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (registration number FMEZ-2025-0055) . - ISSN 2075-1133. - ISSN 2075-115X
Кл.слова (ненормированные):
lithium niobate crystal -- double doping -- OH groups -- luminescence centers -- point and complex defects -- Raman spectroscopy -- laser conoscopy -- photoinduced light scattering
Аннотация: Features of the defect structure of a nominally pure LiNbO3stoich crystal and double-doped LiNbO3:Zn:Mg (3.45:1.41 mol %) and LiNbO3:Zn:Mg (3.45:1.22 mol %) single crystals have been studied using Raman spectroscopy, infrared absorption spectroscopy, photoluminescence, laser conoscopy, and photoinduced light scattering. The material for the study has been obtained using homogeneous and direct doping technology. It has been shown that double-doped LiNbO3:Zn:Mg crystals obtained using different technologies have high resistance to damage by laser radiation. However, the LiNbO3:Zn:Mg (3.45:1.22 mol %) crystal obtained by direct doping technology is characterized by lower compositional uniformity compared to the LiNbO3:Zn:Mg (3.45:1.41 mol %) crystal obtained by homogeneous doping technology. Raman spectra have showed that the features of the defect structure of double-doped LiNbO3:Zn:Mg crystals are largely determined by the magnesium impurity. This may be the reason that the influence of the ordering mechanism of magnesium cations (~1.22–1.44 mol %) prevails over the influence of the disordering mechanism of zinc cations (~3.45 mol %) on the features of the structural units of the cation sublattice. It has been found that the lowest concentration of OH groups and photoluminescence intensity in the near-IR region is characteristic of the LiNbO3:Zn:Mg (3.45:1.41 mol %) crystal obtained by homogeneous doping technology.

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Публикация на русском языке Оптические свойства, структурная однородность и дефектные центры монокристаллов двойного легирования LiNbO3:Zn:Mg, полученных по разным технологиям [Текст] / Р. А. Титов, М. В. Смирнов, Л. А. Бобрева [и др.]. - 18 с. // Перспективн. материалы. - 2024. - № 8. - С. 5-22

Держатели документа:
Tananaev Institute of Chemistry—Subdivision of the Federal Research Centre "Kola Science Centre of the Russian Academy of Sciences", 184209, Apatity, Russia
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia

Доп.точки доступа:
Titov, R. A.; Smirnov, M. V.; Bobreva, L. A.; Teplyakova, N. A.; Palatnikov, M. N.; Biryukova, I. V.; Masloboeva, S. M.; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Sidorov, N. V.
}
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Chemical pressure as an effective tool for tuning the structural disordering and barocaloric efficiency of complex fluorides (NH4)3MF7 (M: Sn, Ti, Ge, Si) / I. N. Flerov, M. V. Gorev, E. V. Bogdanov, N. M. Laptash // J. Phys. D: Appl. Phys. - 2024. - Vol. 57, Is. 17. - Ст. 175301, DOI 10.1088/1361-6463/ad211b. - Cited References: 39. - The study was supported by a Grant from the Russian Science Foundation No. 23-22-00115, https://rscf.ru/project/23-22-00115/ . - ISSN 0022-3727. - ISSN 1361-6463
Кл.слова (ненормированные):
fluorides -- phase transformation -- phase diagram -- entropy -- pressure -- barocaloric effect
Аннотация: Double fluoride salts (NH4)3M4+F7 (M4+: Sn, Ti, Ge, Si) demonstrate a high efficiency of using chemical pressure as a tool for control and tuning structural ordering/disordering, sensitivity to hydrostatic pressure, successions of the phase transitions, etc and, as a result, for purposeful variation within a wide range of parameters of barocaloric effect (BCE). The conventional and inverse BCEs near the triple points were found on the T − p phase diagrams, combination of which can be used to construct original cooling cycle in narrow temperature and pressure ranges. Reconstructive transformation between two cubic phases, Pm3-m ↔ Pa3-, realized in (NH4)3SnF7 at atmospheric pressure and in (NH4)3TiF7 at p ˃ 0.4 GPa are characterized by rather low thermal hysteresis, δT0 = 1 K, and a great entropy change, ΔSBCE = 110–152 J (kg · K)−1, depending on the size of the central atom. At above 300–350 K, a contribution to BCE associated with the regular thermal expansion of the crystal lattice becomes comparable to entropy and temperature changes under pressure in the region of the phase transitions. An analysis of the absolute, relative and integral barocaloric characteristics of (NH4)3M4+F7 compounds showed their high competitiveness with respect to other barocaloric materials considered as promising solid-state refrigerants.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 660074 Krasnoyarsk, Russia
Institute of Engineering Systems and Energy, Krasnoyarsk State Agrarian University, 660049 Krasnoyarsk, Russia
Institute of Chemistry, Far Eastern Department of RAS, 690022 Vladivostok, Russia

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Laptash, N. M.
}
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    Оптические свойства, структурная однородность и дефектные центры монокристаллов двойного легирования LiNbO3:Zn:Mg, полученных по разным технологиям / Р. А. Титов, М. В. Смирнов, Л. А. Бобрева [и др.] // Перспективн. материалы. - 2024. - № 8. - С. 5-22, DOI 10.30791/1028-978X-2024-8-5-22. - Библиогр.: 60. - Работа выполнена при частичной финансовой поддержке правительства Мурманской области научно-исследовательских проектов молодых учёных (№ 201 от 27 ноября 2023 г.) и в рамках государственного задания Министерства науки и высшего образования РФ (регистрационный номер FMEZ-2022-0016) . - ISSN 1028-978X
   Перевод заглавия: Optical properties, structural homogeneity and defect centers of double-doped LiNbO3:Zn:Mg single crystals obtained using different technologies
Кл.слова (ненормированные):
кристалл ниобата лития -- двойное легирование -- OH-группы -- центры люминесценции -- точечные и комплексные дефекты -- спектроскопия КРС -- лазерная коноскопия -- фотоиндуцированное рассеяние света -- lithium niobate crystal -- double doping -- OH groups -- luminescence centers -- point and complex defects -- Raman spectroscopy -- laser conoscopy -- photoinduced light scattering
Аннотация: Методами спектроскопии комбинационного рассеяния света, инфракрасной спектроскопии поглощения, фотолюминесценции, лазерной коноскопии и фотоиндуцированного рассеяния света исследованы особенности дефектной структуры номинально чистого кристалла LiNbO3стех и монокристаллов двойного легирования LiNbO3:Zn:Mg (3,45:1,41 мол. %) и LiNbO3:Zn:Mg (3,45:1,22 мол. %), полученных по технологии гомогенного и прямого легирования. Кристаллы двойного легирования LiNbO3:Zn:Mg, полученные по разным технологиям, обладают высоким сопротивлением повреждению лазерным излучением. Кристалл LiNbO3:Zn:Mg (3,45:1,22 мол. %), полученный по технологии прямого легирования, характеризуется более низкой композиционной однородностью по сравнению с кристаллом LiNbO3:Zn:Mg (3,45:1,41 мол. %), полученным по технологии гомогенного легирования. По спектрам комбинационного рассеяния света обнаружено, что особенности дефектной структуры кристаллов двойного легирования LiNbO3:Zn:Mg в большей степени определяет примесь магния. Обнаруженный факт может быть причиной преобладания влияния упорядочивающего механизма катионов магния (~ 1,22 – 1,44 мол. %) над влиянием разупорядочивающего механизма катионов цинка (~ 3,45 мол. %) на особенности структурных единиц катионной подрешетки. Наименьшее значение концентрации ОН-групп и интенсивности фотолюминесценции в ближней ИК области характерно для кристалла LiNbO3:Zn:Mg (3,45:1,41 мол. %), полученного по технологии гомогенного легирования.
Features of the defect structure of a nominally pure LiNbO3stoich crystal and doubly doped LiNbO3:Zn:Mg (3.45:1.41 mol. %) and LiNbO3:Zn:Mg (3.45:1.22 mol. %) single crystals have been studied using Raman spectroscopy, infrared absorption spectroscopy, photoluminescence, laser conoscopy and photoinduced light scattering. The material for the study has been obtained using homogeneous and direct doping technology. It has been shown that double-doped LiNbO3:Zn:Mg crystals obtained using different technologies have high resistance to damage by laser radiation. However, the LiNbO3:Zn:Mg (3.45:1.22 mol. %) crystal obtained using direct doping technology is characterized by lower compositional uniformity compared to the LiNbO3:Zn:Mg (3.45:1.41 mol. %) crystal obtained using homogeneous doping technology. Raman spectra have showed that the features of the defect structure of double-doped LiNbO3:Zn:Mg crystals are largely determined by the magnesium impurity. This may be the reason that the influence of the ordering mechanism of magnesium cations (~ 1.22 – 1.44 mol. %) prevails over the influence of the disordering mechanism of zinc cations (~ 3.45 mol. %) on the features of the structural units of the cation sublattice. It has been found that the lowest concentration of OH groups and photoluminescence intensity in the near-IR region is characteristic of the LiNbO3:Zn:Mg (3.45:1.41 mol. %) crystal obtained using homogeneous doping technology.

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Переводная версия Optical properties, structural homogeneity, and defect centers of double-doped LiNbO3:Zn:Mg single crystals obtained using different technologies [Текст] / R. A. Titov, M. V. Smirnov, L. A. Bobreva [et al.]. - 13 с. // Inorg. Mater.: Appl. Res. - 2025. - Vol. 16 Is. 2.- P.278-290

Держатели документа:
Институт химии и технологии редких элементов и минерального сырья им. И.В. Тананаева — обособленное подразделение федерального государственного бюджетного учреждения науки Федерального исследовательского центра “Кольский научный центр Российской академии наук” (184209 Апатиты, Мурманская обл., ул. Академгородок, 26а)
Институт физики им. Л.В. Киренского Сибирского отделения Российской академии наук — обособленное подразделение Федерального государственного бюджетного научного учреждения “Федеральный исследовательский центр “Красноярский научный центр Сибирского отделения Российской академии наук” (660036 Красноярск, ул. Академгородок, 50, стр. 38)

Доп.точки доступа:
Титов, Р. А.; Смирнов, М. В.; Бобрева, Л. А.; Теплякова, Н. А.; Палатников, М. Н.; Бирюкова, И. В.; Маслобоева, С. М.; Крылов, Александр Сергеевич; Krylov, A. S.; Втюрин, Александр Николаевич; Vtyurin, A. N.; Сидоров, Н. В.
}
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    Bobrov, P. P.
    The effect of dielectric relaxation processes on the complex dielectric permittivity of soils at frequencies from 10 kHz to 8 GHz—Part II: Broadband analysis / P. P. Bobrov, E. S. Kroshka, K. V. Muzalevskiy // IEEE Trans. Geosci. Remote Sens. - 2024. - Vol. 62. - Ст. 2000411, DOI 10.1109/TGRS.2023.3340693. - Cited References: 51 . - ISSN 0196-2892. - ISSN 1558-0644
   Перевод заглавия: Эффект процессов диэлектрической релаксации на комплексную диэлектрическую проницаемость почв на частотах от 10 кГц до 8 ГГц
Кл.слова (ненормированные):
dielectric measurement -- Dobson dielectric model -- Maxwell–Wagner effect -- refraction-relaxation model -- soil moisture
Аннотация: This article is the second in a series evaluating the effect of dielectric relaxation processes on the relatively effective complex dielectric permittivity (RCP) of soils. Part II is based on the results of experimental measurements in the frequency range 10 kHz to 8–20 GHz. The broadband dielectric spectrum model includes the high-frequency part as a model of the dielectric mixture and the relaxation part as the sum of three relaxation processes modeled by the Debye and Cole–Cole formulas. For modeling the high-frequency part of the spectrum, the Dobson and Mironov models were considered as possible options. As stated in Part I, the influence of relaxation processes on the imaginary part of the RCP extends up to frequencies of units of gigahertz. The increase in the imaginary part in these models was compensated by unrealistically high values of the specific electrical conductivity of free and bound water. We examined the correspondence of these models to experimental data at frequencies above 2–5 GHz, assuming that the conductivity of bound and free water is zero. The parameters of relaxation processes were found while solving the least-square optimization problem using the technique for determining the continuous distribution of relaxation times (DRTs). Found process parameters depend on the content of clay, organic carbon, and moisture of the samples. The more clay is in the soil, the greater the strength of these processes is. The influence of organic carbon with the conditions being equal consists in the reduction of the real and imaginary parts of RCP.

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Держатели документа:
Faculty of Physics, Omsk State Pedagogical University, 644043 Omsk, Russia
Omsk Scientific Center SB RAS (Institute of Radiophysics and Physical Electronics), 644099 Omsk, Russia
Kirensky Institute of Physics Federal Research Center KSC Siberian Branch Russian Academy of Sciences, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Kroshka, E. S.; Muzalevskiy, K. V.; Музалевский, Константин Викторович
}
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Absorption spectra of the purple nonsulfur bacteria light-harvesting complex: A DFT study of the B800 part / L. V. Begunovich, E. A. Kovaleva, M. M. Korshunov, V. F. Shabanov // J. Photochem. Photobiol. A: Chem. - 2024. - Vol. 450. - Ст. 115454, DOI 10.1016/j.jphotochem.2023.115454. - Cited References: 42. - This work was supported by the state assignment of the Ministry of Science and Higher Education of the Russian Federation. Authors would like to thank Information Technology Centre, Novosibirsk State University for providing access to their supercomputers. L.V.B. would like to thank Irkutsk Supercomputer Center of SB RAS for providing the access to HPC-cluster «Akademik V.M. Matrosov» (Irkutsk Supercomputer Center of SB RAS, Irkutsk: ISDCT SB RAS; http://hpc.icc.ru, accessed 20.10.2023) . - ISSN 1010-6030. - ISSN 1873-2666
Кл.слова (ненормированные):
Photosynthesis -- LH2 -- Light harvesting -- Rhodoblastus acidophilus -- Bacteriochlorophyll -- DFT -- DFTB -- Optical spectra
Аннотация: We’ve studied the B800 part of Rhodoblastus acidophilus light-harvesting complex (LH2) by several quantum chemical techniques based on the density functional theory (DFT) and determined the specific method and a minimal reliable model suitable for further studies of the LH2. In addition to bacteriochlorophyll a molecules, the minimal model includes two α and one β chain amino acids. Within the model, we are able to reproduce the contribution of the B800 ring of nine bacteriochlorophyll a molecules to the near infrared Qy absorption band. We also discuss the use of hybrid DFT calculations for precise energy and optical estimations and DFT-based tight binding (DFTB) method for the large-scale calculations. Crucial importance of Hartree-Fock exchange interaction for the correct description of B800 peak position was shown.

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

Доп.точки доступа:
Begunovich, L. V.; Kovaleva, E. A.; Korshunov, M. M.; Коршунов, Максим Михайлович; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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    Оптические полосно-пропускающие фильтры третьего порядка на структурах из чередующихся слоев кварца и серебра / Б. А. Беляев, В. В. Тюрнев, Г. В. Скоморохов [и др.] // Докл. РАН. Физика, техн. науки. - 2024. - Т. 516, № 1. - С. 73-80, DOI 10.31857/S2686740024030119. - Библиогр.: 13. - Работа выполнена при поддержке Министерства науки и высшего образования Российской Федерации, государственное задание FEFE-2023-0004 . - ISSN 2686-7400
   Перевод заглавия: Third-order optical bandpass filters based on structures of alternating layers of quartz and silver
Кл.слова (ненормированные):
слоистая структура металл-диэлектрик -- полосно-пропускающий фильтр -- комплексная диэлектрическая проницаемость -- layered metal-dielectric structure -- bandpass filter -- complex permittivity
Аннотация: Разработаны конструкции оптических полосно-пропускающих фильтров на планарных структурах, полученных вакуумным напылением на подложки из кварцевого стекла (SiO2) трех слоев также из кварца, являющихся полуволновыми резонаторами, разделенными друг от друга, свободного пространства и подложки четырьмя слоями из серебра (Ag). Толщины слоев Ag и SiO2 определялись по заданным параметрам полосы пропускания фильтров параметрическим синтезом одномерных моделей с использованием электродинамического анализа. При этом использовались экспериментальные частотные зависимости действительной и мнимой частей комплексной диэлектрической проницаемости серебра. Измеренные амплитудно-частотные характеристики изготовленных опытных образцов фильтров красного, зеленого и фиолетового цветов хорошо согласуются с характеристиками, полученными при синтезе.
Designs of optical bandpass lters have been developed on planar structures, which were obtained by vacuum deposition onto quartz glass (SiO2) substrates of three layers also of quartz, which are half-wavelength resonators separated from each other, from free space, and from the substrate by four layers of silver (Ag). The thicknesses of the Ag and SiO2 layers were determined based on the given parameters of the lter passband by parametric synthesis of one-dimensional models using electrodynamic analysis. In this case, experimental frequency dependences of the real and imaginary parts of the permittivity of silver were used. The measured frequency responses of the manufactured prototypes of red, green and purple lters are in good agreement with the responses obtained during synthesis.

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Держатели документа:
Сибирский государственный университет науки и технологий им. академика М.Ф. Решетнева, Красноярск, Россия
Сибирский федеральный университет, Красноярск, Россия
Институт физики им. Л.В. Киренского ФИЦ КНЦ Сибирского отделения Российской академии наук, Красноярск, Россия

Доп.точки доступа:
Беляев, Борис Афанасьевич; Belyaev, B. A.; Тюрнев, Владимир Вениаминович; Tyurnev, V. V.; Скоморохов, Георгий Витальевич; Skomorokhov, G. V.; Жарков, Сергей Михайлович; Zharkov, S. M.; Сержантов, Алексей Михайлович; Serzhantov, A. M.; Шабанов, Дмитрий Александрович; Shabanov, D. A.
}
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    Особенности ферромагнитного резонанса в тонких пленках, осажденных на полупроводящие подложки / Б. А. Беляев, В. В. Тюрнев, Г. В. Скоморохов [и др.] // Докл. РАН. Физика, техн. науки. - 2024. - Т. 519, № 1. - С. 5-12, DOI 10.31857/S2686740024060012. - Библиогр.: 22 . - ISSN 2686-7400
   Перевод заглавия: Features of ferromagnetic resonance in thin films deposited on semiconductive substrates
Кл.слова (ненормированные):
слоистая структура металл-диэлектрик -- полосно-пропускающий фильтр -- комплексная диэлектрическая проницаемость -- thin magnetic film -- semiconductors substrate -- complex permittivity -- absorption coefficient
Аннотация: Исследовано поведение спектров ферромагнитного резонанса тонких магнитных пленок из пермаллоя Fe30Ni70 толщиной 50 нм в зависимости от проводимости кремниевой подложки толщиной 0.25 мм. Пленки получены вакуумным магнетронным напылением с использованием DC-магнетрона. Спектры снимались на сканирующем спектрометре ферромагнитного резонанса на частоте измерительной головки 3.123 ГГц с локальностью измерения ∼ 1.0 мм2, определяемой площадью отверстия в измерительной головке. Обнаружено, что в определенном интервале проводимости подложки спектры, снятые в случае положения образца пленкой к измерительному отверстию, инвертируются, когда к измерительному отверстию обращена свободная сторона подложки. Результаты электродинамического анализа одномерной модели, отражающей условия проведенного эксперимента, качественно согласуются с результатами измерений.
The behavior of the ferromagnetic resonance spectra of thin magnetic films made of permalloy Fe30Ni70 with a thickness of 50 nm was studied depending on the conductivity of a 0.25 mm thick silicon substrate. The films were obtained by vacuum magnetron sputtering using a DC magnetron. The spectra were taken on a scanning ferromagnetic resonance spectrometer at a frequency of 3.123 GHz with a measurement locality of ∼ 1.0 mm2, determined by the area of the hole in the measuring head. It was found that in a certain range of substrate conductivity, the spectra taken when the sample was positioned with the film facing the measuring hole are inverted when the free side of the substrate faces the measuring hole. The results of the electrodynamic analysis of the one-dimensional model, reflecting the conditions of the experiment, are in qualitative agreement with the measurement results.

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Держатели документа:
Сибирский государственный университет наука и технологий им. академика М. Ф. Решетнева, Красноярск, Россия
Сибирский федеральный университет, Красноярск, Россия
Институт физики им. Л. В. Киренского Сибирского отделения Российской академии наук, ФИЦ КНЦ СО РАН, Красноярск, Россия

Доп.точки доступа:
Беляев, Борис Афанасьевич; Belyaev, B. A.; Тюрнев, Владимир Вениаминович; Tyurnev, V. V.; Скоморохов, Георгий Витальевич; Skomorokhov, G. V.; Горчаковский, Александр Антонович; Gorchakovsky A. A.; Подшивалов, Иван Валерьевич; Podshivalov, I. V.
}
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10.

Thermochemistry of solid-state formation, structure, optical, and luminescent properties of complex oxides Eu2MeO6 (Me–Mo, W), Eu2W2O9: A combined experimental and DFT study / Yu. V. Seredina, A. S. Oreshonkov, M. S. Molokeev [et al.] // Chem. Eur. J. - 2024. - Vol. 30, Is. 53. - Ст. e202402084, DOI 10.1002/chem.202402084. - Cited References: 56. - This work was partially performed using resources of the Research Resource Center "Natural Resource Management and Physico-Chemical Research" (University of Tyumen) and Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS". We acknowledge Lisa-Marie Wagner (JLU Giessen) for help with X-ray powder diffraction, and Svetlana Volkova and Irina Palamarchuk (University of Tyumen) for help with IR and UV spectrometry. The work was partly carried out within the framework of the Strategic Academic Leadership Program "Priority-2030" for the Tyumen State University, Kazan Federal University, and Siberian Federal University and the state assignment of the Kirensky Institute of Physics . - ISSN 0947-6539. - ISSN 1521-3765
Кл.слова (ненормированные):
DFT -- Europium -- Molybdenum -- Oxides -- Tungsten
Аннотация: Complex oxides Eu2MeO6 (Me–Mo, W), Eu2W2O9 were obtained by a solid-phase reaction between binary oxides. The thermodynamic and kinetic mechanisms of the reaction processes were established using a variety of physical-chemical methods. All compounds obtained in this work crystallize in the low-symmetry monoclinic system, forming complex framework structures, which determine a set of very valuable physical-chemical properties. Comparison of experimental Kubelka-Munk functions and DFT- calculated absorption spectra shows adequate agreement and reveals the origin of the fundamental absorption. In addition, the deficiency in DFT calculations in the part of mutual contribution of CTBs of Mo–O and W–O, from one side, and Eu–O contributions, from the other side, is reported. Calculations of absorption spectra are shown to be superior to band structure analysis in the determination of optical band gaps. Additionally, luminescent properties of Eu2MeO6 and Eu2W2O9 compounds were investigated. These studies provide a better understanding of the electronic and optical properties of the compounds Eu2MeO6 and Eu2W2O9, along with their potential applications in various areas.

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Держатели документа:
School of Natural Sciences, University of Tyumen, Tyumen 625003, Russia
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
School of Engineering and Construction, Siberian Federal University, Krasnoyarsk 660041, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RASK, Krasnoyarsk 660036, Russia
Laboratory of Theory and Optimization of Chemical and Technological Processes, Tyumen State University, Tyumen 625003, Russia
Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, Giessen 35392, Germany
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk 660041, Russia
Butlerov Chemistry Institute, Kazan Federal University, Kazan 420008, Russia
Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen 35392, Germany
Department of Construction Materials, Industrial University of Tyumen, Tyumen 625000, Russia

Доп.точки доступа:
Seredina, Yu. V.; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sedykh, A. E.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zhernakov, M. A.; Khritokhin, N. A.; Azarapin, N. O.; Glukhova, P. O.; Shelpakova, N. A.; Muller-Buschbaum, K.; Denisenko, Yu. G.
}
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11.

Lattice dynamics of the BaMg1/3Ta2/3O3 complex perovskite: DFT calculation and Raman spectroscopy / S. Krylova, E. Popova, Yu. Kitaev, S. Lushnikov // Ferroelectrics. - 2024. - Vol. 618, Is. 5 : International Conference "Material Science and Nanotechnology" (MSN-2023), Part I of II. - P. 1268-1279, DOI 10.1080/00150193.2024.2305092. - Cited References: 31 . - ISSN 0015-0193. - ISSN 1563-5112
Кл.слова (ненормированные):
BaMg1/3Ta2/3O3 -- Raman spectra -- density functional theory -- lattice dynamics
Аннотация: The article presents the results of studies of theBaMg1/3Ta2/3O3 (BMT) complex perovskite crystal using Raman spectroscopy and density functional theory (DFT) calculation. The polarized Raman spectra of a cubic BMT single crystal are obtained in two different geometries in a broad temperature range (5–580 K). The density functional theory calculations of the lattice dynamics and vibrational spectra of the BMT crystal in the Г point of the trigonal phase are carried out. The simulated Raman spectra are analyzed in comparison with the experimental spectra of cubic single crystals and those of ceramics in the trigonal phase. The Raman spectra peculiarities are observed and explained.

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Держатели документа:
L. V. Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Ioffe Institute, St. Petersburg, Russia

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Popova, E.; Kitaev, Yu.; Lushnikov, S.; Material Science and Nanotechnology 2023, International Conference(August 27-30, 2023 ; Ekaterinburg, Russia)
}
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12.

Fedchenko, D.
Rudner photonic topological insulators in the language of the Zhegalkin operators / D. Fedchenko, V. Kulikov, I. Timofeev // Nonlinear Phenom. Complex Syst. - 2023. - Vol. 26, Is. 1. - P. 72-76, DOI 10.33581/1561-4085-2023-26-1-72-76. - Cited References: 5 . - ISSN 1561-4085. - ISSN 1817-2458
Кл.слова (ненормированные):
photonic topological insulator -- cellular automata -- Wolfram codes -- Zhegalkin operator
Аннотация: A topological insulator is a material that exhibits the properties of a conductor on the surface and of an insulator in the bulk. The Rudner game is a simplified model of a topological insulator implemented on a two-dimensional photonic lattice of resonators, which is described in the language of tricolor four-cycle two-dimensional Wolfram cellular automata. It is a case of a regular two-dimensional lattice, in which each cell is colored in one of three colors (for a photonic topological insulator, these colors mean the presence of a photon in a resonator, the absence of a photon, and a topological insulator boundary). By setting the transformation rule for each cell, depending on the state of the nearest neighbors and the cell itself, for equal discrete time intervals we obtain a cellular automaton. In this study, the Rudner game is rewritten equivalently in terms of operators in the Zhegalkin polynomial ring with coefficients in a field consisting of three elements.

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Держатели документа:
Siberian Federal University, Krasnoyarsk 660041, RUSSIA
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, RUSSIA

Доп.точки доступа:
Kulikov, V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Федченко, Дмитрий Петрович
}
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13.

    Kinetics and mechanism of BaLaCuS3 oxidation / N. O. Azarapin, N. A. Khritokhin, V. V. Atuchin [et al.] // Crystals. - 2023. - Vol. 13, Is. 6. - Ст. 903, DOI 10.3390/cryst13060903. - Cited References: 65. - The work was partially carried out using the resources of the Research Resource Center “Natural Resources Management and Physico-Chemical Research” (Tyumen University) with financial support from the Ministry of Science and Higher Education of the Russian Federation (contract No. 05.594.21.0019., Unique identification number RFMEFI59420X0019). M.S. Molokeev was supported by the Tyumen Oblast Government, as part of the West-Siberian Interregional Science and Education Center’s project No. 89-DON (3). - The authors would like to thank the staff of the Engineering Center of the Tyumen State University (special Alexej V. Matigorov) for their help in carrying out physical and chemical tests . - ISSN 2073-4352
   Перевод заглавия: Кинетика и механизм окисления BaLaCuS3
Кл.слова (ненормированные):
BaLaCuS3 -- complex sulfide -- oxidation -- kinetic -- XRD analysis
Аннотация: The oxidation reactions of BaLaCuS3 in the artificial air atmosphere were studied at different heating rates in the temperature range of 50–1200 °C. The oxidation stages were determined by DSC-TG, XRD and IR–vis methods. The kinetic characteristics of the proceeding reactions were obtained with the use of the Kissinger model in a linearized form. Compound BaLaCuS3 was stable in the air up to 280 °C. Upon further heating up to 1200 °C, this complex sulfide underwent three main oxidation stages. The first stage is the formation of BaSO4 and CuLaS2. The second stage is the oxidation of CuLaS2 to La2O2SO4 and copper oxides. The third stage is the destruction of La2O2SO4. The final result of the high-temperature treatment in the artificial air atmosphere was a mixture of barium sulfate, copper (II) oxide and La2CuO4. The mechanism and stages of BaLaCuS3 oxidation and further interactions of the components were discussed.

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Держатели документа:
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen 625003, Russia
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
Research and Development Department, Kemerovo State University, Kemerovo 650000, Russia
Department of Industrial Machinery Design, Novosibirsk State Technical University, Novosibirsk 630073, Russia
R&D Center “Advanced Electronic Technologies”, Tomsk State University, Tomsk 634034, Russia
Laboratory for Nanomaterials and Nanoelectronics, Center for Nature-Inspired Engineering, Technology Park, Tyumen State University, Tyumen 625003, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Laboratory of Theory and Optimization of Chemical and Technological Processes, University of Tyumen, Tyumen 625003, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Hybrid Nanodevice Research Group (HNRG), Department of Electrical Engineering, Indian Institute of Technology Indore, Indore 453552, India
Centre for Advanced Electronics (CAE), Indian Institute of Technology Indore, Indore 453552, India
School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
Institute of Solid State Chemistry, UB RAS, Yekaterinburg 620990, Russia

Доп.точки доступа:
Azarapin, N. O.; Khritokhin, N. A.; Atuchin, V. V.; Gubin, A. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Mukherjee, S.; Andreev, O. V.
}
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14.

Complex interplay between 3d and 4f magnetic systems in multiferroic DyMnO3 / A. N. Matveeva, I. A. Zobkalo, M. Meven [et al.] // J. Magn. Magn. Mater. - 2023. - Vol. 569. - Ст. 170415, DOI 10.1016/j.jmmm.2023.170415. - Cited References: 28. - The authors are grateful to S.V. Gavrilov for the technical assistance. This work was supported by the Russian Foundation for Basic Research grant # 19-52-12047, and DFG grant # SA 3688/1-1, also by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects number 18-42-243024 and 20-42-243008. The neutron data were obtained at the instrument HEiDi operated jointly by RWTH Aachen University and Jülich Centre for Neutron Science within JARA cooperation . - ISSN 0304-8853
Кл.слова (ненормированные):
Neutron diffraction -- Crystal structure -- Multiferroics -- Magnetic structure -- Manganites
Аннотация: Structural and magnetic properties of single crystals of DyMnO3 were investigated by neutron diffraction in order to study the peculiarities of 3d-4f interactions in this compound. Precise magnetic order and its detailed temperature evolution were determined using single crystal neutron diffraction. Elliptical cycloid on manganese subsystem below TCh = 19 K was confirmed, with temperature decrease the elipticity of the Mn magnetic structure reduces significantly, creating almost circular cycloid. Temperature evolution of the magnetic structure demonstrate specific hysteretic behavior. The results show a complex interplay between transition metal and rare earth magnetic sublattices leading to so-called “Mn- controlled” and “Dy- controlled” magnetic states. The strong and complicate 3d-4f interaction leads to the unusual very slow magnetic structure relaxation.

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Держатели документа:
Petersburg Nuclear Physics Institute by B.P. Konstantinov of NRC «Kurchatov Institute», Gatchina, 188300, Russian Federation
Institute of Crystallography, RWTH Aachen University and Julich Centre for Neutron Science at Heinz Maier- Leibnitz Zentrum, Garching, Germany
Kirensky Institute of Physics, Federal Research Center, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Matveeva, A. N.; Zobkalo, I. A.; Meven, M.; Freidman, A. L.; Фрейдман, Александр Леонидович; Semenov, S. V.; Семёнов, Сергей Васильевич; Terentjev, K. Yu.; Терентьев, Константин Юрьевич; Pavlovskiy, N. S.; Павловский, Николай Сергеевич; Kolkov, M. I.; Колков, Максим Игоревич; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Hutanu, V.
}
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15.

    Structural and spectroscopic effects of Li+ substitution for Na+ in LixNa1–xCaLa0.5Er0.05Yb0.45(MoO4)3 upconversion scheelite-type phosphors / C. S. Lim, A. Aleksandrovsky, M. Molokeev [et al.] // Crystals. - 2023. - Vol. 13, Is. 2. - Ст. 362, DOI 10.3390/cryst13020362. - Cited References: 63. - This study was funded by the Research Program through the Campus Research Foundation funded by Hanseo University in 2022 (2022046) . - ISSN 2073-4352
   Перевод заглавия: Структурные и спектроскопические эффекты замещения Na+ на Li+ в LixNa1-xCaLa0.5Er0.05Yb0.45(MoO4)3 ап-конверсионных люминофорах типа шеелита
Кл.слова (ненормированные):
microwave sol-gel synthesis -- complex molybdate -- scheelite -- crystal structure -- Raman -- frequency up-conversion -- band structure
Аннотация: New triple molybdates LixNa1−xCaLa0.5(MoO4)3:Er3+0.05/Yb3+0.45 (x = 0, 0.05, 0.1, 0.2, 0.3) were manufactured successfully using the microwave-assisted sol-gel-based technique (MAS). Their room-temperature crystal structures were determined in space group I41/a by Rietveld analysis. The compounds were found to have a scheelite-type structure. In Li-substituted samples, the sites of big cations were occupied by a mixture of (Li, Na, La, Er, Yb) ions, which provided a linear cell volume decrease with the Li content increase. The increased upconversion (UC) efficiency and Raman spectroscopic properties of the phosphors were discussed in detail. The mechanism of optimization of upconversion luminescence upon Li content variation was shown to be due to the control of excitation/energy transfer channel, while the control of luminescence channels played a minor role. The UC luminescence maximized at lithium content x = 0.05. The mechanism of UC optimization was shown to be due to the control of excitation/energy transfer channel, while the control of luminescence channels played a minor role. Over the whole spectral range, the Raman spectra of LixNa1−xCaLa0.5(MoO4)3 doped with Er3+ and Yb3+ ions were totally superimposed with the luminescence signal of Er3+ ions, and increasing the Li+ content resulted in the difference of Er3+ multiple intensity. The density functional theory calculations with the account for the structural disorder in the system of Li, Na, Ca, La, Er and Yb ions revealed the bandgap variation from 3.99 to 4.137 eV due to the changing of Li content. It was found that the direct electronic transition energy was close to the indirect one for all compounds. The determined chromaticity points (ICP) of the LiNaCaLa(MoO4)3:Er3+,Yb3+ phosphors were in good relation to the equal-energy point in the standard CIE (Commission Internationale de L’Eclairage) coordinates.

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Department of Aerospace Advanced Materials and Chemical Engineering, Hanseo University, Seosan 31962, Republic of Korea
Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, 660041 Krasnoyarsk, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 660041 Krasnoyarsk, Russia
Department of Physics, Far Eastern State Transport University, 680021 Khabarovsk, Russia
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
School of Engineering and Construction, Siberian Federal University, 660041 Krasnoyarsk, Russia
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, 630090 Novosibirsk, Russia
Research and Development Department, Kemerovo State University, 650000 Kemerovo, Russia
Department of Industrial Machinery Design, Novosibirsk State Technical University, 630073 Novosibirsk, Russia
R&D Center “Advanced Electronic Technologies”, Tomsk State University, 634034 Tomsk, Russia

Доп.точки доступа:
Lim, Chang S.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Atuchin, V.
}
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16.

Lattice dynamics of the BaMg1/3Ta2/3O3 complex perovskite / S. N. Krylova, E. A. Popova, Yu. E. Kitaev, S. G. Lushnikov // Materials Science and Nanotechnology (MSN-2023) : abstract book of International conference / Ural Federal University; org. com. A. N. Vtyurin [et al.]. - Ekaterinburg, 2023. - Ст. O14. - P. 54. - Cited References: 9. - Russian Foundation for Basic Research and DFG project No 21-52-12018 . - ISBN 978-5-9500624-6-9

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Держатели документа:
Kirensky Institute of Physics SB RAS

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Vtyurin, A. N. \org. com.\; Втюрин, Александр Николаевич; Krylova, S. N.; Крылова, Светлана Николаевна; Popova, E. A.; Kitaev, Yu. E.; Lushnikov, S. G.; 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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17.

The role of chemical pressure in the formation of the structure and barocaloric properties of complex fluorides and oxyfluorides / I. N. Flerov, M. V. Gorev, E. V. Bogdanov, N. M. Laptash // Crystallogr. Rep. - 2023. - Vol. 68, Is. 5. - P. 765-778, DOI 10.1134/S1063774523600485. - Cited References: 67 . - ISSN 1063-7745. - ISSN 1562-689X
Аннотация: The role of chemical pressure as an effective tool in the processes of formation of initial and distorted (as a result of structural transformations) phases, thermodynamic properties, and direct and inverse barocaloric effects in some complex oxyfluorides and fluorides with octahedral, tetrahedral, and spherical anion and cation groups in the structure has been studied. It is found that, due to the small temperature hysteresis and high baric sensitivity of materials, the maximum values of absolute and integral barocaloric characteristics can be implemented at low pressures. Correspondingly, the temperature range of reversibility of thermodynamic cycles based on fluorides/oxyfluorides as solid-state coolants can be expanded.

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Публикация на русском языке Роль химического давления в формировании структуры и барокалорических свойств комплексных фторидов и оксифторидов [Текст] / И. Н. Флёров, М. В. Горев, Е. В. Богданов, Н. М. Лапташ. - 14 с. // Кристаллография. - 2023. - Т. 68 № 5. - С. 776-789

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, Russia
Institute of Engineering Systems and Energy, Krasnoyarsk State Agrarian University, Krasnoyarsk, Russia
Institute of Chemistry, Far Eastern Branch, Vladivostok, Russia

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Laptash, N. M.
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18.

    Complex of ceftriaxone with Mg(II): Synthesis, structure, spectral and antibacterial properties / G. V. Novikova, D. I. Tsyplenkova, A. A. Kuzubov [et al.] // J. Sib. Fed. Univ. Chem. - 2023. - Vol. 16, Is. 1. - P. 5-15 ; Журн. СФУ. Химия. - Cited References: 28. - The research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20–43–240007 . - ISSN 1998-2836. - ISSN 2313-6049
   Перевод заглавия: Комплекс цефтриаксона с Mg(II): синтез, структура, спектральные и антибактериальные свойства
Кл.слова (ненормированные):
cephalosporin antibiotic -- ceftriaxone -- magnesium -- density functional theory -- molecular spectroscopy -- antibacterial screening -- цефалоспориновые антибиотики -- цефтриаксон -- магний -- теория функционала плотности -- молекулярная спектроскопия -- антибактериальный скрининг
Аннотация: Magnesium complex of ceftriaxone was obtained and characterized by atomic-emission and elemental analysis, TGA, FTIR and Raman spectroscopy, X-ray diffraction and density functional theory calculations. Ceftriaxone was coordinated to the magnesium ion by the oxygen of the triazine cycle in the 6th position, the nitrogen of the amine group of the thiazole ring, and oxygen atoms of the lactam carbonyl and carboxylate groups. The disodium salt of ceftriaxone and magnesium complex were screened for antibacterial activity against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa.
Получен и охарактеризован магниевый комплекс цефтриаксона методами атомно-эмиссионного и элементного анализов, ТГА, ИК- и КР‑спектроскопии, РФА и расчетов теории функционала плотности. Цефтриаксон координируется к иону магния через кислород триазинового цикла в шестом положении, азот аминогруппы тиазольного цикла и атомы кислорода карбоксильной и лактамной групп. Динатриевая соль цефтриаксона и комплекс магния были исследованы на антибактериальную активность в отношении Staphylococcus aureus, Escherichia coli и Pseudomonas aeruginosa.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
L.V. Kirensky Institute of Physics SB RAS Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russian Federation
Scientific Research Institute of Medical Problems of the North Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS”, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS Federal Research Center "Krasnoyarsk Scientific Center of the SB RAS", Krasnoyarsk, Russian Federation

Доп.точки доступа:
Novikova, G. V.; Tsyplenkova, D. I.; Kuzubov, A. A.; Кузубов, Александр Александрович; Kolenchukova, O. A.; Samoilo, A. S.; Vorobyev, S. A.

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19.

Muzalevskiy, K. V.
LPDA calibration using an UAV for synthesizing UWB impulses / K. Muzalevskiy // IEEE Antennas Wirel. Propag. Lett. - 2023. - Vol. 22, Is. 9. - P. 2140-2144, DOI 10.1109/LAWP.2023.3278333. - Cited References: 19. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project № 22-17-20042 . - ISSN 1536-1225. - ISSN 1548-5757
Кл.слова (ненормированные):
Log-periodic dipole antenna (LPDA) -- complex antenna transfer function -- complex antenna return loss -- ultra-wideband (UWB) impulses -- impulse radiation -- unmanned aerial vehicle (UAV)
Аннотация: In this letter, the possibility of synthesizing ultra-wideband (UWB) impulses with a conventional log-periodic dipole antenna (LPDA) mounted on a quadrotor unmanned aerial vehicle (UAV) was demonstrated. The formation of impulses using LPDA (bandwidth from 427 MHz to 1.01 GHz) with a duration of 1.9 ns, containing one period of field oscillations, became possible due to compensation of amplitude and phase-frequency distortions introduced by the antenna into radiated and received impulses. Compensation for these distortions was carried out by inverse filtering method after calibrating the antenna-feeder path at various heights UAV hovering above the reference reflector (brass mesh). The conductive carbon elements of UAV, located in the near field of the antenna, are indirectly taken into account during the calibration of antenna-feeder path parameters and do not introduce significant distortions into the generated impulses. The suggested method of synthesizing UWB impulses can find application in environmental remote sensing and can also be used to sharpen fronts of impulses radiated\received with LPDA.

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Держатели документа:
Kirensky Institute of Physics SB RAS Akademgorodok 36, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Музалевский, Константин Викторович
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20.

Charge-transfer plasmons of complex nanoparticle arrays connected by conductive molecular bridges / A. S. Fedorov, M. A. Visotin, E. V. Eremkin [et al.] // Phys. Chem. Chem. Phys. - 2022. - Vol. 24, Is. 32. - P. 19531-19540, DOI 10.1039/d2cp01811j. - Cited References: 43. - The work is supported (ASF, EVE, POK, and SPP) by the Russian Science Foundation (project no. 18-13-00363) . - ISSN 1463-9076
Кл.слова (ненормированные):
Charged nanoparticles -- Complex nanoparticles -- Coulombs energy -- External electromagnetic field -- Molecular bridges -- Molecular dynamics algorithms -- Molecular linkers -- Nanoparticle array -- Plasmon frequency -- Statistic approaches
Аннотация: Charge-transfer plasmons (CTP) in complexes of metal nanoparticles bridged by conductive molecular linkers are theoretically analysed using a statistic approach. The applied model takes into account the kinetic energy of carriers inside the linkers including its dissipation and the Coulomb energy of the charged nanoparticles. The plasmons are statistically investigated for systems containing a large number of complexes of bridged nanoparticles of realistic sizes generated using a simplified molecular dynamics algorithm, where the geometries of the complexes are dependent on the rate of connection of the linkers with the nanoparticles. As illustrated, the distribution of CTP frequencies in the generated nanoparticle complexes is very inhomogeneous. It has a narrow peak, corresponding to CTP plasmons in dimers, and two broad peaks, corresponding mainly to low and high-frequency oscillations in chains of connected nanoparticles. It is found that in general the plasmon frequencies depend inversely on the value of the complex dipole moment of the plasmon oscillation, where the assumption follows that low-frequency plasmons will be more efficiently excited in an external electromagnetic field. To calculate the CTP energy absorption in this field two model modifications are proposed: a system-external electromagnetic field interaction model and a simplified broadening plasmon peak model where the plasmons are calculated at first without damping and where the delta-shaped oscillation peaks are broadened then due to the damping. It is demonstrated that both modifications lead to a wide and almost monotonic absorption in the IR region for all generated systems containing a large number of bridged nanoparticles due to the presence of a large number of CTPs in this region.

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Держатели документа:
International Research Center of Spectroscopy and Quantum Chemistry - IRC SQC, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala, SE-751 20, Sweden
Federal Siberian Research Clinical Center under FMBA of Russia, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Visotin, M. A.; Высотин, Максим Александрович; Eremkin, E. V.; Krasnov, P. O.; Agren, H.; Polyutov, S. P.
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