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    Пятнов, Максим Владимирович.
    Фотоэлектрохимическое расщепление воды наноструктурированным электродом и зеленая водородная энергетика / М. В. Пятнов, И. В. Тимофеев // Фотоника. - 2022. - Т. 16, Вып. 2. - С. 116-125 ; Photonics Rus., DOI 10.22184/1993-7296.FRos.2022.16.2.116.125. - Библиогр.: 28. - Исследование выполнено за счет гранта Российского научного фонда и Красноярского краевого фонда поддержки научной и научно-технической деятельности № 22-22-20078, https://rscf.ru/project/22-22-20078 . - ISSN 1993-7296. - ISSN 2686-844X
   Перевод заглавия: Photoelectrochemical water splitting by a nanostructured electrode and green hydrogen energy
Кл.слова (ненормированные):
плазмонный катализ -- расщепление воды -- фототок -- эффективность преобразования света в водород -- plasmonic catalysis -- water splitting -- photo-induced current -- light-to-hydrogen conversion efficiency
Аннотация: В статье описан перспективный способ получения водорода – фотоэлектрохимическое расщепление воды. Этот подход сочетает непосредственное использование солнечной энергии и низкую стоимость производства фотоэлектрохимических ячеек из широко распространенных на Земле полупроводниковых материалов. Последние достижения в конструировании таких ячеек включают наноструктурирование полупроводниковых электродов плазмонными материалами.
This article describes a promising hydrogen formation method, namely the photoelectrochemical water splitting. This approach combines the direct use of solar energy and low production cost of photoelectrochemical cells using the widely used semiconductor materials. The latest advances in such cell design include nanostructuring of the semiconductor electrodes with plasmonic materials.

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Держатели документа:
Институт физики им. Л. В. Киренского СО РАН -обособленное подразделение ФИЦ КНЦ СО РАН
Сибирский федеральный университет

Доп.точки доступа:
Тимофеев, Иван Владимирович; Timofeev, I. V.; Pyatnov, M. V.

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    Получение и активация TiO2 фотонно- кристаллических структур для повышения эффективности реакции фотоэлектрохимического разложения воды / Т. А. Кенова, Н. А. Зосько, М. В. Пятнов [и др.] // Журн. СФУ. Химия. - 2024. - Т. 17, № 1. - С. 27-38 ; J. Sib. Fed. Univ. Chem. - Библиогр.: 25. - Исследование выполнено за счет гранта Российского научного фонда и Красноярского краевого фонда поддержки научной и научно-технической деятельности № 22-22-20078, https://rscf.ru/project/22-22-20078/ с использованием оборудования Красноярского регионального центра коллективного пользования ФИЦ КНЦ СО РАН . - ISSN 1998-2836. - ISSN 2313-6049
   Перевод заглавия: Synthesis and activation of TiO2 photonic crystal structures for enhanced photoelectrochemical water splitting
Кл.слова (ненормированные):
фотонно-кристаллические TiO2 наноструктуры -- активация TiO2 фотонных кристаллов -- фотоэлектрохимическая активность -- разложение воды -- photonic-crystal TiO2 nanostructures -- TiO2 photonic crystals activation -- photoelectrochemical activity -- water splitting
Аннотация: Наноструктурированные фотонно-кристаллические пленки TiO2 анодно синтезированы при импульсном и ступенчатом изменениях напряжения. Полученные фотонные структуры активированы методом циклической вольтамперометрии в 0,5M Na2SO4. Фотоэлектрохимическая активность электродов исследована в реакции разложения воды в области длин волн 360–700 нм. Активация приводит к изменению энергии запрещенной зоны, красному сдвигу спектра IPCE и увеличению его значений в исследованном диапазоне длин волн.
TiO2 photonic crystal nanostructure films are anodic synthesized with pulsed and stepwise voltage changes. The obtained photonic structures were activated by cyclic voltammetry in 0.5M Na2SO4. The photoelectrochemical activity of the electrodes was studied in the water splitting reaction in the wavelength range 360–700 nm. Activation leads to a change in the band gap energy, a red shift in the IPCE spectrum and an increase in its values in the studied wavelength range.

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Держатели документа:
Институт химии и химической технологии СО РАН ФИЦ "Красноярский научный центр СО РАН", Российская Федерация, Красноярск
Институт физики им. Л.В. Киренского СО РАН ФИЦ "Красноярский научный центр СО РАН", Российская Федерация, Красноярск
Сибирский федеральный университет, Российская Федерация, Красноярск

Доп.точки доступа:
Кенова, Т. А.; Зосько, Н. А.; Пятнов, Максим Владимирович; Pyatnov, M. V.; Александровский, Александр Сергеевич; Aleksandrovsky, A. S.; Максимов, Н. Г.; Жижаев, А. М.; Таран, О. П.

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    Ветров, Степан Яковлевич.
    S–поляризованный спектр одномерного фотонного кристалла с анизотропным дефектным слоем нанокомпозита [Текст] / С. Я. Ветров, П. С. Панкин, И. В. Тимофеев // Ученые зап. физ. фак-та МГУ. - 2014. - № 4. - С. 144304. - Библиогр.: 3 назв.
   Перевод заглавия: S–polarized spectrum of one-dimensional photonic crystal with anisotropic nanocomposite defect layer
Кл.слова (ненормированные):
спектр пропускания -- расщепление дефектной моды -- плазмонный резонанс -- нанокомпозит -- transmission spectrum -- splitting of the defect mode -- plasmon resonance -- nanocomposite
Аннотация: Исследованы спектральные свойства одномерного фотонного кристалла с дефектом структуры, в качестве которого рассмотрен слой анизотропного нанокомпозита, внедренного между двумя многослойными диэлектрическими зеркалами. Выявлен ряд важных особенностей в спектре пропускания фотонного кристалла.
Spectral properties are investigated of one-dimensional photonic crystal with structure defect which is considered as an anisotropic nanocomposite layer embedded between two multilayer dielectric mirrors. A number of important features in the transmission spectrum of the photonic crystal are found.

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

Доп.точки доступа:
Панкин, Павел Сергеевич; Тимофеев, Иван Владимирович; Timofeev, I. V.; Vetrov, S. Ya.
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Zeeman effect and stark splitting of the electronic states of the rare-earth ion in the paramagnetic terbium garnets Tb3Ga5O12 and Tb3Al5O12 / U. V. Valiev [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 1. - P. 91-98, DOI 10.1134/S1063783407010167. - Cited References: 14 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
YTTRIUM-ALUMINUM-GARNET
   SELECTIVE POLARIZED SPECTROSCOPY
   CRYSTAL-FIELD ANALYSIS
   GALLIUM GARNET
Аннотация: The Zeeman effect in the F-7(6) - D-5(4) absorption band of the Tb3+ ion in the paramagnetic garnets Tb3Ga5O12 and Tb3Al5O12 was Studied. The field dependences of the Zeeman splitting of some absorption lines arc found to exhibit unusual behavior: as the magnetic field increases, the hand splitting decreases rather than increases. Symmetry analysis relates these lines to 4f - 4f electron transitions of the doublet-quasi-doublet or quasi-doublet-doublet type, for which the field dependences of the splitting differ radically from the well-known field dependences of the Zeeman splitting for quasi-doublet-quasi-doublet or quasi-doublet-singlet transitions in a longitudinal magnetic field.

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Держатели документа:
Natl Univ Uzbekistan, Tashkent 700174, Uzbekistan
Univ Texas, San Antonio, TX 78249 USA
ARL, Adelphi Lab Ctr, Adelphi, MD 20783 USA
Natl Acad Sci Ukraine, Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
National University of Uzbekistan, Tashkent 700174, Uzbekistan
University of Texas at San Antonio, San Antonio, TX 78249-0697, United States
ARL, Adelphi Laboratory Center, Adelphi, MD 20783-1197, United States
Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, pr. Lenina 47, Kharkov, 61103, Ukraine
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Valiev, U. V.; Gruber, J. B.; Sardar, D. K.; Zandi, B.; Kachur, I. S.; Mukhammadiev, A. K.; Piryatinskaya, V. G.; Sokolov, V. Y.; Edelman, I. S.; Эдельман, Ирина Самсоновна
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Vetrov, S. Ya.
Peculiarities of spectral properties of a one-dimensional photonic crystal with an anisotropic defect layer of the nanocomposite with resonant dispersion / S. Y. Vetrov, P. S. Pankin, I. V. Timofeev // Quantum Electron. - 2014. - Vol. 44, Is. 9. - P. 881-884, DOI 10.1070/QE2014v044n09ABEH015473. - Cited References: 22. - The work was partially supported by the SB RAS programme (Grant Nos 43, 101 and 24.29); the Russian Foundation for Basic Research (Grant No. 14-02-31248); the Government Programme of the Ministry of Education and Science of the Russian Federation (Project No. 1276); RF President's Grants Council for the State Support to Young Russian Scientists (No. MK-250.2013.2); and NSCT-SB RAS joint project. . - ISSN 1063-7818. - ISSN 1468-4799

РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
MODE
GLASS
Кл.слова (ненормированные):
transmission spectrum -- splitting of the defect mode -- plasmon resonance -- nanocomposite
Аннотация: We have studied the spectral properties of a one-dimensional photonic crystal with a structure defect that represents an anisotropic nanocomposite layer sandwiched between two multi-layer dielectric mirrors. The nanocomposite consists of metallic nanoscale inclusions of orientationally ordered spheroidal shape, dispersed in a transparent matrix, and is characterised by an effective resonant permittivity. Each of the two orthogonal polarisations of probe radiation corresponds to a particular plasmon resonant frequency of the nanocomposite. The problem of calculating the transmittance spectrum of the waves with s- and p-polarisations for such structures is solved. Spectral manifestation of splitting of the defect mode depending on the structure parameters and volumetric fraction of the nanospheroids is studied. The essential dependence of the position of maxima of the defect modes in the bandgap of the photonic crystal and their splitting on the incidence angle, polarisation, and the ratio of lengths of the polar and equatorial semi-axes of the spheroidal nanoparticles is shown.

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Публикация на русском языке Ветров, Степан Яковлевич. Особенности спектральных свойств одномерного фотонного кристалла с анизотропным дефектным слоем нанокомпозита, имеющего резонансную дисперсию [Текст] / С. Я. Ветров, П. С. Панкин, И. В. Тимофеев // Квант. электроника : Физический институт им. П.Н.Лебедева РАН, 2014. - Т. 44 № 9. - С. 881–884

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Pankin, P. S.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ветров, Степан Яковлевич; SB RAS programme [43, 101, 24.29]; Russian Foundation for Basic Research [14-02-31248]; Government Programme of the Ministry of Education and Science of the Russian Federation [1276]; RF President's Grants Council [MK-250.2013.2]; NSCT-SB RAS joint project
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Val'kov, V. V.
Splitting of the spectrum of fermionic excitations in a topological insulator by charge fluctuations / V. V. Val'kov // JETP Letters. - 2021. - Vol. 114, Is. 12. - P. 751-756, DOI 10.1134/S0021364021240097. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (project no. 19-02-00348) . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
HUBBARD FERMIONS
   EDGE STATES
   PHASE
   SURFACE
Аннотация: It is shown that the intersite Coulomb interaction of electrons in a topological insulator leads to the splitting of the initial energy structure and to the induction of two bands of fluctuation states. As a result, the total spectrum of Fermi excitations of the topological insulator has a four-band structure. The dielectric gap is determined by the energy interval between the bottom of the band of fluctuation states of conduction electrons and the top of the valence band of fluctuation states. Since the band of fluctuation states is narrow, quasiparticles with different effective masses appear.

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Публикация на русском языке Вальков, Валерий Владимирович. Расщепление спектра фермиевских возбуждений топологического изолятора зарядовыми флуктуациями [Текст] / В. В. Вальков // Письма в ЖЭТФ. - 2021. - Т. 114 Вып. 12. - С. 812-817

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Вальков, Валерий Владимирович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-02-00348]
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Val'kov, V. V.
Splitting of the lower subband of Hubbard fermions in the Shubin-Vonsowsky model under the influence of strong intersite correlations / V. V. Val'kov, M. M. Korovushkin // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 1. - P. 108-120, DOI 10.1134/S1063776110061056. - Cited References: 26. - We express our deep gratitude to R. O. Zaitsev for numerous remarks and discussions. We are grateful to A. A. Golovnya, A. A. Shklyaev, and V. A. Mitskan for specific advice on the numerical calculations of the mass operator. This work was supported by the "Quantum Condensed Matter Physics" Program of the Presidium of the Russian Academy of Sciences, the Russian Foundation for Basic Research (project no. 10-02-00251), the "Scientific and Scientific-Pedagogical Personnel of Innovational Russian for 2009-2013" Federal Goal-Oriented Program, and the Interdisciplinary Integration Project no. 53 of the Siberian Branch of the Russian Academy of Sciences. One of us (M. K.) thanks Lavrentiev's contest of youth projects of the Siberian Branch of the Russian Academy of Sciences. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
NARROW ENERGY BANDS
ELECTRON CORRELATIONS
Кл.слова (ненормированные):
Cooper channels -- Cooper instability -- Density of electronic state -- Doping levels -- Electron concentration -- Energy structures -- Hubbard -- Hubbard operators -- Interaction energies -- Intersite correlation -- Mott-Hubbard insulator -- Nonuniform -- Renormalization -- Root mean squares -- Scattering amplitudes -- Spectral intensity -- Split-off band -- Strongly correlated fermions -- Sub-bands -- Doping (additives) -- Superconducting transition temperature
Аннотация: The diagram technique for Hubbard operators is used to investigate the influence of intersite Coulomb interactions on the energy structure and Cooper instability of strongly correlated fermions. Allowance for intersite correlations in doped Mott-Hubbard insulators is shown to lead to a splitting of the lower subband of Hubbard fermions and to the formation of a band of fluctuation states as soon as the intersite interaction energy becomes comparable to or exceeds the mean kinetic energy. The spectral intensity of the splitoff band is proportional to the root-mean-square fluctuation of the occupation numbers and increases with doping level. The predicted effect changes significantly the structure of the density of electronic states. This leads to a renormalization of the pole of the scattering amplitude in the Cooper channel and manifests itself as a nonuniform (in electron concentration) modification of the dependence of the critical superconducting transition temperature.

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Держатели документа:
[Val'kov, V. V.
Korovushkin, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Val'kov, V. V.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Korovushkin, M. M.; Коровушкин, Максим Михайлович; Вальков, Валерий Владимирович
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Val'kov, V. V.
Lower subband splitting and superconductivity of 2D Hubbard fermions with strong intersite correlations / V. V. Val'kov, M. M. Korovushkin // Bull. Russ. Acad. Sci. Phys. - 2012. - Vol. 76, Is. 2. - P. 133-135, DOI 10.3103/S1062873812020074. - Cited References: 6. - This study was supported by Quantum Physics of Condensed Matter program of the Presidium of the Russian Academy of Sciences; the Russian Foundation for Basic Research, project np. 10-02-00251; the federal target program Scientists and Science Teachers of an Innovate Russia, 2009-2013; the Siberian Branch of the Russian Academy of Sciences, complex integration project no. 53; RF Presidential Grant MK-1300.2011.2; and the Siberian Branch of the Russian Academy of Sciences' Lavrent'ev Competition for Young Scientists. . - ISSN 1062-8738
Кл.слова (ненормированные):
Coulomb correlations -- Doping levels -- Electron structures -- Fermi state -- Hubbard -- Intersite correlation -- Mean-square fluctuations -- Spectral intensity -- Split-off band -- Subbands -- Natural sciences
Аннотация: The effect of the strong intersite Coulomb correlations on the formation of an electron structure in the Shubin-Vonsowsky model in the regime of strong one-site correlations is studied. The results reveal a split-off band of the Fermi states. The spectral intensity of this band grows with the enhancement of the doping level and is determined by the mean-square fluctuation of occupation numbers. This changes the structure of the electron density of states qualitatively. © 2012 Allerton Press, Inc.

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Публикация на русском языке Вальков, Валерий Владимирович. Расщепление нижней подзоны и сверхпроводимость 2D-фермионов Хаббарда при сильных межузельных корреляциях [Текст] / В. В. Вальков, М. М. Коровушкин // Изв. РАН. Сер. физич. - 2012. - Т. 76 № 2. - С. 158-160

Доп.точки доступа:
Korovushkin, M. M.; Коровушкин, Максим Михайлович; Вальков, Валерий Владимирович; International Symposium "Nanophysics and Nanoelectronics-2011" (March 2011 ; Nizhni Novgorod)
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    Tuning of photoluminescence and local structures of substituted cations in xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7:Eu2+ phosphors / M. Chen [et al.] // Chem. Mater. - 2017. - Vol. 29, Is. 3. - P. 1430-1438, DOI 10.1021/acs.chemmater.7b00006. - Cited References: 37. - The present work was supported by the National Natural Science Foundation of China (Grants 91622125 and 51572023), Natural Science Foundations of Beijing (2172036), and Fundamental Research Funds for the Central Universities (FRF-TP-15-003A2). . - ISSN 0897-4756
   Перевод заглавия: Управляемая люминесценция и локальная структура замещаемых катионов в люминофоре xSr2Ca(PO4)2-(1-x)Ca10Li(PO4)7:Eu2+
Кл.слова (ненормированные):
Calcium -- Energy transfer -- Europium -- Light emission -- Lithium -- Luminescence -- Phosphors -- Photoionization -- Photoluminescence -- Single crystals -- Composition ranges -- Crystal-field splitting -- Luminescence measurements -- Non-linear variation -- Photoionization process -- Polyhedra distortion -- Rare earth doped solids -- Temperature dependent -- Solid solutions
Аннотация: Local structure modification in solid solution is an essential part of photoluminescence tuning of rare earth doped solid state phosphors. Herein we report a new solid solution phosphor of Eu2+-doped xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7 (0 ≤ x ≤ 1), which share the same β-Ca3(PO4)2 type structure in the full composition range. Depending on the x parameter variation in xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7:Eu2+, the vacancies generated in the M(4) site enable the nonlinear variation of cell parameters and volume, and this increases the magnitude of M(4)O6 polyhedra distortion. The local structure modulation around the Eu2+ ions causes different luminescent behaviors of the two-peak emission and induces the photoluminescence tuning. The shift of the emission peaks in the solid solution phosphors with different compositions has been discussed. It remains invariable at x ≤ 0.5, but the red-shift is observed at x > 0.5 which is attributed to combined effect of the crystal field splitting, Stokes shift, and energy transfer between Eu2+ ions. The temperature-dependent luminescence measurements are also performed, and it is shown that the photoionization process is responsible for the quenching effect.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
State Key Laboratory of Tribology, Tsinghua University, Beijing, China

Доп.точки доступа:
Chen, M.; Xia, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wang, T.; Liu, Q.
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10.

Transversal Zeeman effect in NdFe3(BO3)4 antiferromagnet / S. L. Gnatchenko [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P6.13. - P. 321. - References: 1 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
Kramers doublet -- splitting -- effective field

Доп.точки доступа:
Gnatchenko, S. L.; Гнатченко С. Л.; Kashur, I. S.; Кашур И. С.; Kurnosov, V. S.; Курносов В. С.; Piryatinskaya, V. G.; Пирятинская В. Г.; Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gudim, I. A.; Гудим, Ирина Анатольевна; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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11.

    Temperature-dependent absorption lines observation in Raman spectra of SmFe3 (BO3)4 ferroborate / E. Moshkina [et al.] // J. Raman Spectrosc. - 2018. - Vol. 49, Is. 10. - P. 1732-1735, DOI 10.1002/jrs.5430. - Cited References: 12. - RFBR, Grant/Award Numbers: 18-02-00696 and 18-02-00754 . - ISSN 0377-0486. - ISSN 1097-4555
   Перевод заглавия: Температурно зависимые линии поглощения в спектрах комбинационного рассеяния ферробората SmFe3(BO3)4

РУБ Spectroscopy
Рубрики:
SmFe3 (BO3)4
Ho1-xNdxFe3(BO3)4
CRYSTALS
Кл.слова (ненормированные):
absorption -- ferroborates -- huntite -- level splitting -- magnetic phase -- transitions
Аннотация: The paper demonstrates possibilities of observation and thermal dependency study of the absorption lines as a co‐product of Raman spectroscopy study in SmFe3 (BO3)4 ferroborate. Raman spectra of the ferroborate were studied in a wide temperature range (T = 10÷300 K). Temperature‐dependent absorption lines sensitive to the magnetic phase transition have been observed in Raman spectra at two spectral ranges.

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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Gudim, I. A.; Гудим, Ирина Анатольевна; Temerov, V. L.; Темеров, Владислав Леонидович; Krylov, A. S.; Крылов, Александр Сергеевич; RFBR [18-02-00696, 18-02-00754]
}
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12.

Specific features of Nd3+ Kramers doublets' splitting in an antiferromagnetic crystal NdFe3(BO3)4 in an external magnetic field / S. L. Gnatchenko [et al.] // Low Temp. Phys. - 2019. - Vol. 45, Is. 8. - P. 928-933, DOI 10.1063/1.5116545. - Cited References: 27. - A. V. Malakhovskii is grateful for the financial support provided by the RFBR Grant No. 19-02-00034. . - ISSN 1063-777X
Аннотация: The optical absorption spectra of an easy-plane NdFe3(BO3)4 antiferromagnet are measured in the region of the 4I9/2 → 2H11/2 transition of the of Nd3+ ion. The study is performed in the 2-35 K temperature range, in external magnetic fields of up to 65 kOe directed both along the C3 axis and the basal plane of the crystal. The splitting values of the Nd3+ excited states in the exchange field of the Fe3+ subsystem and the g-factors of the 2H11/2 multiplet states are determined. The nontrivial dependences of the splitting of some Nd3+ states in a magnetic field indicate that these states have anisotropic Fe-Nd exchange interaction. © 2019 Author(s).

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Публикация на русском языке Особенности расщепления крамерсовых дублетов Nd3+ в антиферромагнитном кристалле NdFe3(BO3)4 во внешнем магнитном поле [Текст] / С. Л. Гнатченко [и др.] // Физ. низких температур. - 2019. - Т. 45 Вып. 8. - С. 1084-1091 ; Fiz. Nizk. Temp.

Держатели документа:
B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 47 Nauky Ave., Kharkiv, 61103, Ukraine
Kirensky Institute of Physics, Federal Research Center of Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Gnatchenko, S. L.; Kachur, I. S.; Kurnosov, V. S.; Piryatinskaya, V. G.; Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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13.

Sandler, Yu. M.
Unstability and phase-transition splitting in perovskites at non-ferroelectric structural phase-transitions / Yu. M. Sandler // Solid State Commun. - 1980. - Vol. 33, Is. 2. - P. 265-266, DOI 10.1016/0038-1098(80)90369-5. - Cited References: 6 . - ISSN 0038-1098

РУБ Physics, Condensed Matter

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Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
}
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14.

Novel Janus 2D structures of XMoY (X, Y = O, S, Se, Te) composition for solar hydrogen production / E. V. Sukhanova, N. Sagatov, A. S. Oreshonkov [и др.] // Int. J. Hydrog. Energy. - 2023. - Vol. 48, Is. 38. - P. 14226-14237, DOI 10.1016/j.ijhydene.2022.12.286. - Cited References: 97. - The authors acknowledge financial support from Russian Science Foundation (№ 21-73-20183). The authors are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences and to the Information Technology Centre of Novosibirsk State University for providing access to the cluster computational resources . - ISSN 0360-3199. - ISSN 1879-3487
Кл.слова (ненормированные):
Photocatalytic water splitting -- Novel materials -- Transition metal dichalcogenides -- H2 generation
Аннотация: The successful fabrication of H-phase Janus transition metal dichalcogenides (TMDs) has received considerable interest due to its great potential in photocatalytic applications. Here, new A′-XMoY (X/Y = O, S, Se, Te) Janus-type structures belonging to the family of TMDs were theoretically investigated for the first time in terms of photocatalytic water splitting via DFT calculations. For all compounds, the Raman spectra were calculated. The SMoO, SeMoO, SMoSe, SMoTe and SeMoTe compounds are dynamically stable and are semiconductors. Among all considered structures SMoTe is the most promising candidate for solar hydrogen production because valence and conduction bands perfectly engulf the redox potentials of water at both neutral and acidic media, opposite to SMoSe, SMoO, SeMoO suitable only in the acidic media, and SeMoTe – in the neutral media. Moreover, A′-SMoTe demonstrates the outstanding values of the solar-to-hydrogen (STH) conversion efficiencies of 54.0 and 67.1 for neutral and acidic media.

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Держатели документа:
Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia
Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prosp. acad. Koptyuga 3, 630090 Novosibirsk, 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
Novosibirsk State University, Pirogova 2, 630090 Novosibirsk, Russia

Доп.точки доступа:
Sukhanova, E.V.; Sagatov, N.; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Gavryushkin, P.N.; Popov, Z.I.
}
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15.

Mode splitting in 37-42 GHz barium hexaferrite resonator: Theory and device applications / M. A. Popov [et al.] // IEEE Trans. Magn. - 2014. - Vol. 50, Is. 6. - Ст. 4004507, DOI 10.1109/TMAG.2014.2298498. - Cited References: 34 . - ISSN 0018-9464. - ISSN 1941-0069

РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
MILLIMETER-WAVE APPLICATIONS
   GUIDE JUNCTION CIRCULATORS
   FERRITE
   MICROWAVE
   PROPAGATION
   CYLINDERS
Кл.слова (ненормированные):
Dielectric resonance -- ferromagnetic resonance (FMR) -- hexagonal ferrite -- isolator -- phase shifter
Аннотация: Dielectric resonances in the 37-42 GHz frequency band in the single crystal barium hexaferrite that occur well below the ferromagnetic resonance (FMR) have been investigated. Sample dimensions have been chosen so that the mode frequency is lower than the spin-wave excitation (in this case, the natural domain resonance) frequency. Such dielectric mode frequencies, being a function of both permittivity and permeability, are magnetic field H tunable. Here, we report on below-FMR magnetodielectric resonance (MDR) axially magnetized barium hexaferrites and their H-tuning characteristics. Our studies reveal H-tuning by up to 2.5 GHz and the tuning is the largest when the ferrite is in a magnetically unsaturated state. A theory for the MDR is presented and a fairly good agreement between experimental data and theory has been obtained. Tunable millimeter wave phase shifters and isolators utilizing the below-FMR dielectric resonances have been demonstrated.

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Держатели документа:
Taras Shevchenko Natl Univ Kyiv, Radiophys Dept, UA-01601 Kiev, Ukraine
Oakland Univ, Dept Phys, Rochester, MI 48309 USA
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Popov, M. A.; Zavislyak, I. V.; Movchan, N. N.; Gudim, I. A.; Гудим, Ирина Анатольевна; Srinivasan, G.
}
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16.

Magnetic anisotropy and magnetoelectric properties of Tb1-x Er (x) Fe-3(BO3)(4) ferroborates / A. K. Zvezdin [et al.] // J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 1. - P. 68-73, DOI 10.1134/S1063776109070097. - Cited References: 18. - This study was supported by the Russian Foundation for Basic Research (project no. 07-02-00580). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
GDFE3(BO3)(4)
Кл.слова (ненормированные):
Competing exchange -- Complex compositions -- Critical fields -- Electric polarization -- Er concentrations -- Exchange splitting -- Ferroborates -- G factors -- Magnetoelectric properties -- Nonmonotonic -- Simple model -- Spin-flop transitions -- Composite micromechanics -- Erbium -- Ions -- Magnetic anisotropy -- Magnetostriction -- Magnetostrictive devices -- Phase transitions -- Polarization -- Spin dynamics -- Terbium alloys -- Single crystals
Аннотация: Magnetic and magnetoelectric properties of ferroborate single crystals with complex composition (Tb1 - x Er (x) Fe-3(BO3)(4), x = 0, 0.75) and with competing exchange Tb-Fe and Er-Fe interactions are investigated. Jumps in electric polarization, magnetostriction, and magnetization are observed as a result of spin-flop transitions, as well as a considerable decrease in the critical field upon an increase in the Er concentration, in a field H (c) parallel to the c axis. The observed behavior of phase-transition fields is analyzed and explained using a simple model taking into account anisotropy in g factors and exchange splitting of funda-mental doublets of the easy-axis Tb3+ ion and easy-plane Er3+ ion. It is established that magnetoelectric and magnetostriction anomalies under spin-flop transitions are mainly controlled by the Tb subsystem. The Tb subsystem makes a nonmonotonic contribution Delta P (a) (H (a) , T) to polarization along the a axis: the value of Delta P (a) reverses its sign and increases with temperature due to the contribution from the excited states of the Tb3+ ion.

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Держатели документа:
[Zvezdin, A. K.
Pyatakov, A. P.
Ivanov, V. Yu.
Kuz'menko, A. M.
Mukhin, A. A.] Russian Acad Sci, Prokhorov Inst Gen Phys, Moscow 119991, Russia
[Kadomtseva, A. M.
Popov, Yu. F.
Vorob'ev, G. P.
Pyatakov, A. P.] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
[Bezmaternykh, L. N.
Gudim, I. A.] Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660038, Russia
ИФ СО РАН
Moscow State University, Moscow 119992, Russian Federation
Prokhorov Institute of General Physics, Russian Academy of Sciences, Moscow 119991, Russian Federation
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660038, Russian Federation

Доп.точки доступа:
Zvezdin, A. K.; Kadomtseva, A. M.; Popov, Y. F.; Vorob'ev, G. P.; Pyatakov, A. P.; Ivanov, V. Y.; Kuz'menko, A. M.; Mukhin, A. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [07-02-00580]
}
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17.

Influence of magnetic ordering on electronic structure of Tb3+ ion in TbFe3(BO3)(4) crystal / A. V. Malakhovskii [et al.] // Eur. Phys. J. B. - 2011. - Vol. 80, Is. 1. - P. 1-10, DOI 10.1140/epjb/e2011-10806-x. - Cited References: 28. - The work was supported by the Russian Foundation for Basic Researches grant No. 09-02-00171-a, and by OFN RAS Program 2.3.3.1. . - ISSN 1434-6028

РУБ Physics, Condensed Matter

Кл.слова (ненормированные):
Abrupt change -- Absorption lines -- Crystal-field splitting -- Equilibrium geometries -- Exchange fields -- Excited electronic state -- External magnetic field -- Ion environment -- Local environments -- Magnetic ordering -- Magnetic ordering temperatures -- Magnetically ordered state -- Optical absorption spectrum -- Singlet state -- Structural phase transition -- Sub-lattices -- Temperature intervals -- Temperature variation -- Absorption -- Crystal orientation -- Electric excitation -- Electronic structure -- Ground state -- Ions -- Light absorption -- Magnetic fields -- Magnetic moments -- Excited states
Аннотация: Optical absorption spectra of trigonal crystal TbFe3(BO3)(4) have been studied in the region of F-7(6) -> D-5(4) transition in Tb3+ ion depending on temperature (2-220 K) and on magnetic field (0-60 kOe). Splitting of the Tb3+ excited states, both under the influence of the external magnetic field and effective exchange field of the Fe-sublattice, have been determined. Land, factors of the excited states have been found. Stepwise splitting of one of the absorption lines has been discovered in the region of the Fe-sublattice magnetic ordering temperature. This is shown to be due to the abrupt change of equilibrium geometry of the local Tb3+ ion environment only in the excited state of the Tb3+ ion. In general, the magnetic ordering is accompanied by temperature variations of the Tb3+ local environment in the excited states. The crystal field splitting components have been identified. In particular, it has been shown that the ground state (in D (3) symmetry approximation) consists of two close singlet states of A (1) and A (2) type, which are split and magnetized by effective exchange field of the Fe-sublattice. Orientations of magnetic moments of the excited electronic states relative to that of the ground state have been experimentally determined in the magnetically ordered state of the crystal. A pronounced shift of one of absorption lines has been observed in the vicinity of the TbFe3(BO3)(4) structural phase transition. The temperature interval of coexistence of the phases is about 3 K.

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Держатели документа:
[Malakhovskii, A. V.
Sukhachev, A. L.
Temerov, V. L.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Gnatchenko, S. L.
Kachur, I. S.
Piryatinskaya, V. G.] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
ИФ СО РАН
L. V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, Kharkov 61103, Ukraine

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Temerov, V. L.; Темеров, Владислав Леонидович
}
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18.

    Halogen-doped Chevrel phase Janus monolayers for photocatalytic water splitting / E. V. Sukhanova, N. E. Sagatov, A. S. Oreshonkov [et al.] // Nanomaterials. - 2023. - Vol. 13, Is. 2. - Ст. 368, DOI 10.3390/nano13020368. - Cited References: 85. - The authors acknowledge financial support from the Russian Science Foundation (no. 21-73-20183) . - ISSN 2079-4991
   Перевод заглавия: Гологен-допированные шеврелеподобные монослои со структурой типа "Янус" для фотокаталитического расщепления воды
Кл.слова (ненормированные):
TMDs -- non-van der Waals monolayers -- Mo6S8 -- Mo3S4 -- 2D materials -- exfoliation -- OER -- HER -- nanomaterials
Аннотация: Chevrel non-van der Waals crystals are promising candidates for the fabrication of novel 2D materials due to their versatile crystal structure formed by covalently bonded (Mo6X8) clusters (X–chalcogen atom). Here, we present a comprehensive theoretical study of the stability and properties of Mo-based Janus 2D structures with Chevrel structures consisting of chalcogen and halogen atoms via density functional theory calculations. Based on the analysis performed, we determined that the S2Mo3I2 monolayer is the most promising structure for overall photocatalytic water-splitting application due to its appropriate band alignment and its ability to absorb visible light. The modulated Raman spectra for the representative structures can serve as a blueprint for future experimental verification of the proposed structures.

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Держатели документа:
Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia
Laboratory of Phase Transformations and State Diagrams of the Earth’s Matter at High Pressures, Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, 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
Geology Geophysics Department, Novosibirsk State University, 630090 Novosibirsk, Russia

Доп.точки доступа:
Sukhanova, Ekaterina V.; Sagatov, Nursultan E.; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Gavryushkin, Pavel N.; Popov, Zakhar I.
}
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19.

Cyclic voltammetry as an activation method of TiO2 nanotube arrays for improvement of photoelectrochemical water splitting performance / N. A. Zos’ko, A. S. Aleksandrovsky, T. Kenova [et al.] // ChemPhotoChem. - 2023. - Vol. 7, Is. 9. - Ст. e202300100, DOI 10.1002/cptc.202300100. - Cited References: 36. - The authors express their gratitude to A. M. Zhizhaev for the microscopy and XRD analysis and V. F. Shabanov for the fruitful discussion. - This work was conducted within the framework of the budget project FWES-2021-0023 for Institute of Chemistry and Chemical Technology SB RAS using the equipment of Krasnoyarsk Regional Research Equipment Centre of SB RAS . - ISSN 2367-0932
Кл.слова (ненормированные):
cyclic voltammetry -- electrochemical anodization -- photoelectrochemical activity -- TiO2 nanotubes -- water splitting
Аннотация: A facile and eco-friendly method for activating anodic TiO2 nanotubes (TNTs) by cyclic voltammetry (CV) is proposed, and photoelectrochemical properties of CV-activated TNTs are compared with those of non-activated TNTs and of TNTs activated by hydrogen-thermal reduction. EPR and luminescence studies show that the pristine samples demonstrate rather large content of paramagnetic and luminescing defects, while hydrogenation and CV-activation lead to the different type of rearrangement of defects. TNTs activated by CV-Na2SO4 demonstrate significantly improved photocurrent density (2.25 mA cm-2) in comparison with that of the hydrogen treated and pristine ones (0.93 mA cm-2 and 0.31 mA cm-2) under NUV-irradiation at 0.2 V (RHE). Enhanced photoactivity of Na2SO4-activated TNTs correlates with higher luminescence quantum yield, lowest paramagnetic defects content and larger decay time of the luminescence. Thus, a decrease in the content of defects is an important factor that reduces the non-radiative recombination of charge carriers. The activation-induced redistribution of surface and bulk defects in nanotubes explains the increased photoelectrochemical activity of TiO2-based anodes. Cyclic voltammetry has been proved to be a reliable method to increase the efficiency of TNTs in PEC water splitting.

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Держатели документа:
Laboratory of Catalytic Transformations of Renewable Resources Laboratory of Molecular Spectroscopy and Analysis Institute of Chemistry and Chemical Technology, SB RAS FRC «Krasnoyarsk Science Center SB RAS»,Krasnoyarsk, 660036 (Russia)
Laboratory of Coherent OpticsL.V. Kirensky Institute of Physics SB RAS FRC «Krasnoyarsk Science Center SB RAS»,Krasnoyarsk, 660036 (Russia)
Siberian Federal University, Krasnoyarsk, 660041 (Russia)

Доп.точки доступа:
Zos’ko, Nikolay A.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Kenova, Tatyana; Gerasimova, Marina A.; Maksimov, Nikolay G.; Taran, Oxana P.
}
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20.

Broadband Tamm plasmons in chirped photonic crystals for light-induced water splitting / M. V. Pyatnov, R. G. Bikbaev, I. V. Timofeev [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 6. - Ст. 928, DOI 10.3390/nano12060928. - Cited References: 41 . - ISSN 2079-4991
Кл.слова (ненормированные):
water splitting -- plasmon catalysis -- solar-to-hydrogen efficiency -- photocurrent
Аннотация: An electrode of a light-induced cell for water splitting based on a broadband Tamm plasmon polariton localized at the interface between a thin TiN layer and a chirped photonic crystal has been developed. To facilitate the injection of hot electrons from the metal layer by decreasing the Schottky barrier, a thin n-Si film is embedded between the metal layer and multilayer mirror. The chipping of a multilayer mirror provides a large band gap and, as a result, leads to an increase in the integral absorption from 52 to 60 percent in the wavelength range from 700 to 1400 nm. It was shown that the photoresponsivity of the device is 32.1 mA/W, and solar to hydrogen efficiency is 3.95%.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Computer Modelling, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pyatnov, M. V.; Пятнов, Максим Владимирович; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ryzhkov, I. I.; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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