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Monoclinic SmAl3(BO3)4: synthesis, structural and spectroscopic properties / A. S. Oreshonkov, N. P. Shestakov, M. S. Molokeev [et al.]> // Acta Crystallogr. B. - 2020. - Vol. 76. - P. 654-660, DOI 10.1107/S2052520620008781. - Cited References: 38. - Funding for this research was provided by: Russian Foundation for Basic Research (grant Nos. 18-03-00750, 18-05-00682 and 18-32-20011 to AO)
. - ISSN 2052-5206 Перевод заглавия: Моноклинный SmAl3(BO3)4: синтез, структура и спектроскопические свойстваРУБ Chemistry, Multidisciplinary + Crystallography Рубрики: Optical-properties Luminescence Spectra Crystals Sm Кл.слова (ненормированные): IR spectroscopy -- monoclinic structure -- luminescence -- Raman spectroscopy -- X-ray diffraction -- crystal structure Аннотация: Single crystals of SmAl3(BO3)4 were synthesized by the group growth on seeds method. The crystal structure was solved using a single-crystal experiment and the purity of the bulk material was proved by the Rietveld method. This borate crystallizes in the monoclinic C2/c space group with unit-cell parameters a = 7.2386 (3), b = 9.3412 (5), c = 11.1013 (4) Å and β = 103.2240 (10)°. IR and Raman spectroscopic analyses confirmed the monoclinic structure of SmAl3(BO3)4. Under 532.1 nm excitation, luminescence spectra exhibit bands assignable to the transitions from 4G5/2 to 6H5/2, 6H7/2, 6H9/2 and 6H11/2. The similarity of the luminescence spectra of the trigonal and monoclinic polymorphs is explained by the minor role of Sm—O bond distortion and the primary role of rotational distortion of SmO6 octahedra. The smaller covalency of the Sm—O bond in alumoborates is deduced in comparison with galloborates. Calorimetric measurements did not reveal high-temperature structural phase transitions up to a temperature of 720 K.
Смотреть статью, Scopus, WOS Держатели документа: Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Mol Spect, Krasnoyarsk 660036, Russia. Siberian Fed Univ, Sch Engn & Construct, Krasnoyarsk 660041, Russia. Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, Russia. Siberian Fed Univ, Sch Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia. Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Coherent Opt, Krasnoyarsk 660036, Russia. Siberian Fed Univ, Inst Nanotechnol Spect & Quantum Chem, Krasnoyarsk 660041, Russia. Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Radiospect & Spintron, Krasnoyarsk 660036, Russia. Russian Acad Sci, Inst Automat & Electrometry, Novosibirsk 630090, Russia. Fed Res Ctr KSC SB RAS, Dept Mol Elect, Krasnoyarsk 660036, Russia. Siberian Fed Univ, Krasnoyarsk 660074, Russia. Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia. Ind Univ Tyumen, Dept Gen & Special Chem, Tyumen 625000, Russia. Доп.точки доступа: Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Temerov, V. L.; Темеров, Владислав Леонидович; Adichtchev, S. V.; Pugachev, A. M.; Nemtsev, I. V.; Немцев, Иван Васильевич; Pogoreltsev, E. I.; Погорельцев, Евгений Ильич; Denisenko, Y. G.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-03-00750, 18-05-00682, 18-32-20011] } Найти похожие
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Synthesis and characterization of core-shell magnetic nanoparticles NiFe2O4@Au / D. Saykova, S. Saikova, Y. Mikhlin [et al.]> // Metals. - 2020. - Vol. 10, Is. 8. - Ст. 1075, DOI 10.3390/met10081075. - Cited References: 45
. - ISSN 2075-4701 Перевод заглавия: Синтез и характеристика магнитных наночастиц ядро-оболочка NiFe2O4@AuРУБ Materials Science, Multidisciplinary + Metallurgy & Metallurgical Рубрики: NICKEL FERRITE NANOPARTICLES GOLD NANOPARTICLES OXIDATION REDUCTION Кл.слова (ненормированные): nickel ferrite nanoparticles -- NiFe2O4@Au core-shell nanoparticles -- synthesis -- X-ray photoelectron spectroscopy -- magnetic circular dichroism Аннотация: In this study, NiFe2O4@Au core–shell nanoparticles were prepared by the direct reduction of gold on the magnetic surface using amino acid methionine as a reducer and a stabilizing agent simultaneously. The obtained nanoparticles after three steps of gold deposition had an average size of about 120 nm. The analysis of particles was performed by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis spectroscopy techniques. The results indicate successful synthesis of core–shell particles with the magnetic core, which consists of a few agglomerated nickel ferrite crystals with an average size 25.2 ± 2.0 nm, and the thick gold shell consists of fused Au0 nanoparticles (NPs). Magnetic properties of the obtained nanoparticles were examined with magnetic circular dichroism. It was shown that the magnetic behavior of NiFe2O4@Au NPs is typical for superparamagnetic NPs and corresponds to that for NiFe2O4 NPs without a gold shell. The results indicate the successful synthesis of core–shell particles with the magnetic nickel ferrite core and thick gold shell, and open the potential for the application of the investigated hybrid nanoparticles in hyperthermia, targeted drug delivery, magnetic resonance imaging, or cell separation. The developed synthesis strategy can be extended to other metal ferrites and iron oxides.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Siberian Fed Univ, Sch Nonferrous Met & Mat Sci, Krasnoyarsk 660041, Russia. Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Fed Res Ctr,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia. Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr, Krasnoyarsk Sci Ctr,Siberian Branch, Krasnoyarsk 660036, Russia. Доп.точки доступа: Saykova, Diana; Saikova, Svetlana; Mikhlin, Yuri; Panteleeva, Marina; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Belova, E. } Найти похожие
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Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals / S. Grishina, P. Kodera, S. Goryainov [et al.]> // J. Raman Spectrosc. - 2020. - Vol. 51, Is. 12. - P. 2505-2516, DOI 10.1002/jrs.6005. - Cited References: 55. - Russian Foundation for Basic Research, Grant/Award Numbers: 18-05-00682, 18-05-00682; European Regional Development Fund, Grant/Award Number: ITMS 26240220086; Vedecka Grantova Agentura MSVVaS SR a SAV, Grant/Award Number: 1/0313/20
. - ISSN 0377-0486. - ISSN 1097-4555РУБ Spectroscopy Рубрики: SALT MELT IRON DEPOSIT FLUIDS TRANSFORMATIONS FERRIHYDRITE Кл.слова (ненормированные): daughter mineral -- Fe-oxyhydroxides -- fluid inclusion -- rinneite -- weathering Аннотация: Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral‐forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high‐resolution X‐ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman‐active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Russian Acad Sci, Sobolev Inst Geol & Mineral, Dept Mineral, Siberian Branch, Novosibirsk, Russia. Comenius Univ, Dept Econ Geol, Fac Nat Sci, Bratislava, Slovakia. Kirensky Inst Phys, Mol Spect Lab, Krasnoyarsk, Russia. Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk, Russia. Novosibirsk State Univ, Dept Geol, Novosibirsk, Russia. Slovak Acad Sci, Inst Inorgan Chem, Bratislava, Slovakia. Russian Acad Sci, Inst Geol Ore Deposits Petrog Mineral & Geochem, Moscow, Russia. Доп.точки доступа: Grishina, Svetlana; Kodera, Peter; Goryainov, Sergey; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Seryotkin, Yurii; Simko, Frantisek; Polozov, Alexander G.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-05-00682]; European Regional Development FundEuropean Union (EU) [ITMS 26240220086]; Vedecka Grantova Agentura MSVVaS SR a SAV [1/0313/20] } Найти похожие
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Core-hole localization and ultra-fast dissociation in SF6 / V. Ekholm, G. S. Chiuzbaian, C. Sathe [et al.]> // J. Phys. B. - 2020. - Vol. 53, Is. 18. - Ст. 185101, DOI 10.1088/1361-6455/aba204. - Cited References: 36. - This work was supported by the Swedish Research Council (VR). The calculations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC). FG acknowledges support within the Russian Science Foundation (Project No. 16-12-10109)
. - ISSN 0953-4075. - ISSN 1361-6455РУБ Optics + Physics, Atomic, Molecular & Chemical Рубрики: X-RAY-EMISSION SYMMETRY-BREAKING AB-INITIO SPECTROSCOPY SPECTRA Кл.слова (ненормированные): SF6 -- resonant inelastic x-ray scattering -- symmetry selection rules -- ultrafast dynamics -- vibronic couplings Аннотация: Resonant inelastic x-ray scattering spectra excited at the fluorine K resonances of SF6 have been recorded. While a small but significant propensity for electronically parity-allowed transitions is found, the observation of parity-forbidden electronic transitions is attributed to vibronic coupling that breaks the global inversion symmetry of the electronic wavefunction and localizes the core hole. The dependence of the scattering cross section on the polarization of the incident radiation and the scattering angle is interpreted in terms of local π/σ symmetry around the S–F bond. This symmetry selectivity prevails during the dissociation that occurs during the scattering process.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Lund Univ, MAX IV Lab, Box 118, SE-22100 Lund, Sweden. Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden. Sorbonne Univ, F-75005 Paris, France. CNRS, LCPMR, F-75005 Paris, France. Synchrotron SOLEIL, LOrme Merisiers, BP 48, F-91192 Gif Sur Yvette, France. Ctr Nacl Pesquisa Energia & Mat CNPEM, BR-10000 Campinas, Brazil. Royal Inst Technol, Sch Biotechnol, Theoret Chem & Biol, S-10691 Stockholm, Sweden. Siberian Fed Univ, Krasnoyarsk 660041, Russia. Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia. Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden. Доп.точки доступа: Ekholm, V.; Chiuzbaian, G. S.; Sathe, C.; Nicolaou, A.; Guarise, M.; Simon, M.; Jaouen, N.; Luning, J.; Hague, C. F.; Gel'mukhanov, F.; Гельмуханов, Фарис Хафизович; Odelius, M.; Bjorneholm, O.; Rubensson, J-E; Swedish Research Council (VR)Swedish Research Council; Russian Science FoundationRussian Science Foundation (RSF) [16-12-10109] } Найти похожие
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Transition metal catalyzed Fe–C coupling reactions in synthesis of dicarbonyl(2-thienylethynyl)(η5-cyclopentadienyl)iron complex: Spectroscopic, structure and electrochemical study / V. V. Verpekin, I. S. Ahremchik, A. D. Vasiliev [et al.]> // Transit. Met. Chem. - 2020. - Vol. 45. - P. 589-594, DOI 10.1007/s11243-020-00413-9. - Cited References: 31. - This research was funded by a grant from the Russian Science Foundation (Project No. 18-73-00150)
. - ISSN 0340-4285 Кл.слова (ненормированные): Catalysis -- Catalysts -- Nuclear magnetic resonance spectroscopy -- Transition metals -- X ray powder diffraction Аннотация: The new σ-alkynyl iron(II) complex Cp(CO)2Fe-C≡C-(2-C4H3S) was synthesized with application of several known approaches based on the transition metal (Pd/Cu–, Au–, Cu– and Pd–) catalyzed Fe–C coupling reactions of 2-ethynylthiophene or 2-[(trimethylsilyl)ethynyl]thiophene with cyclopentadienyliron dicarbonyl iodide. The yield of the complex in these reactions was found to strongly depend on the catalyst used. The conditions, catalysts, and reagents that provide the highest yields of the desired 2-thienylethynyl iron complex were determined. The complex was characterized by IR, 1H and 13C NMR spectroscopy. The molecular structure of Cp(CO)2Fe–C≡C-(2-C4H3S) established by X-ray diffraction analysis exhibits a three-leg piano stool geometry. The redox properties of the new complex were studied.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Akademgorodok, 50-24, Krasnoyarsk, 660036, Russian Federation Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Akademgorodok, 50-38, Krasnoyarsk, 660036, Russian Federation Siberian Federal University, Svobodny prospekt, 79, Krasnoyarsk, 660041, Russian Federation A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow, 119991, Russian Federation Доп.точки доступа: Verpekin, V. V.; Ahremchik, I. S.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Burmakina, G. V.; Kondrasenko, A. A.; Nedelina, T. S.; Kreindlin, A. Z. } Найти похожие
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Single particle Raman spectroscopy analysis of the metal-organic framework DUT-8(Ni) switching transition under hydrostatic pressure / A. Krylov, I. Senkovska, S. Ehrling [et al.]> // Chem. Commun. - 2020. - Vol. 56, Is. 59. - P. 8269-8272, DOI 10.1039/d0cc02491k. - Cited References: 40. - This work is financially supported by the Russian Foundation for Basic Research No18-02-00754 and German research foundation (FOR 2433, MOF-switches). The authors would like to thank Dr. V. Bon for support and scientific discussions
. - ISSN 1364-548X Аннотация: Experimental in situ observations of phase coexistence in switchable metal-organic frameworks are reported to provide a fundamental understanding of dynamic adsorbents that can change their pore structure in response to external stimuli. A prototypical flexible pillared layer framework DUT-8(Ni) (DUT = Dresden University of Technology) was studied under hydrostatic pressure by in situ Raman spectroscopy on single crystals. The closing transition of the open pore phase (op) containing DMF in the pores in silicon oil as a pressure transmitting fluid, as well as the closed pore phase (cp) to op transition under pressure in methanol, were studied. Phase coexistences during both transitions were observed.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation Chair of Inorganic Chemistry I, Technische Universitat Dresden, Bergstrasse 66, 01069 Dresden, Germany Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, 660041, Russian Federation Доп.точки доступа: Krylov, A. S.; Крылов, Александр Сергеевич; Senkovska, I.; Ehrling, S.; Maliuta, M.; Krylova, S. N.; Крылова, Светлана Николаевна; Slyusareva, E.; Vtyurin, A. N.; Втюрин, Александр Николаевич; Kaskel, S. } Найти похожие
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Formation, evolution and characteristics of copper sulfide nanoparticles in the reactions of aqueous cupric and sulfide ions / Y. Mikhlin, V. Nasluzov, A. Ivaneeva [et al.]> // Mater. Chem. Phys. - 2020. - Vol. 255. - Ст. 123600, DOI 10.1016/j.matchemphys.2020.123600. - Cited References: 74. - This research was supported by the Russian Foundation for Basic Research , project 18-03-00526a . We thank the ESRF for allocating beamtime, and the BM23 staff for their help during the experiments. Facilities of the Krasnoyarsk Regional Research Equipment Centre of SB RAS were employed in the work
. - ISSN 0254-0584 Перевод заглавия: Формирование, эволюция и свойства наночастиц сульфида меди, сформировавшихся в результате реакции между ионами меди и серы в водном растворе Кл.слова (ненормированные): Copper sulfide nanoparticles -- Polysulfide -- X-ray photoelectron spectroscopy -- X-ray absorption spectroscopy -- DFT+U Аннотация: Colloidal copper sulfides produced in reactions of aqueous copper and sulfide ions are important for many materials applications, environment and mineral processing. Here, CuxS nanoparticles formed and aged at varying copper sulfate to sodium sulfide ratios were studied using in situ UV–vis–NIR spectroscopy, dynamic light scattering, X-ray absorption spectroscopy, ex situ TEM, X-ray photoelectron spectroscopy and Raman scattering, and DFT + U calculations. It was established that the ratio of aqueous Cu2+ to S2− ions of 1:2 is critical for the reaction, which yields disordered covellite-like 4–6 nm Cu0.7S nanoparticles comprised polysulfide species at this and higher sulfide concentrations; upon aging, the particles release sulfur and transform to chalcocite-like structure (Cu2-xS, x < 1). Conversely, at the “excess” of copper ions, Cu2-xS-type particles grew into 12–14 nm “covellitic” nanoparticles. The optical absorbance at 1100–1200 nm commonly attributed to localized surface plasmon resonance increased with time and was lowest for Cu2+/S2−= 1:2. DFT + U calculations found that polysulfide stabilizes copper-deficit covellite, while Cu vacancies in chalcocite are more favorable and destabilized by S–S bonding; the Fermi level energy increases and the hole density decreases with polysulfide formation. We believe that CuS2 clusters form initially, and following conversion of disulfide to polysulfide and then monosulfide ions rather than release of Cu determines the character of CuxS nanoparticles.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk, 660036, Russian Federation Kirensky Institute of Physics, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation Siberian Federal University, Svobodny Pr. 79, Krasnoyarsk, 660041, Russian Federation European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, Grenoble, F-38042, France Доп.точки доступа: Mikhlin, Y. L.; Nasluzov, V.; Ivaneeva, A.; Vorobyev, S.; Likhatski, M.; Romanchenko, A.; Krylov, A. S.; Крылов, Александр Сергеевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Meira, D. M. } Найти похожие
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Krylov, A. S. Raman spectroscopy of crystals / A. Krylov> // Crystals. - 2020. - Vol. 10, Is. 11. - Ст. 981. - P. 1-4, DOI 10.3390/cryst10110981. - Cited References: 10
. - ISSN 2073-4352
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation Доп.точки доступа: Крылов, Александр Сергеевич } Найти похожие
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Втюрин, Александр Николаевич. Фазовые переходы в кристаллах мультиферроиков со структурой хантита, содержащих ионы редкоземельных элементов - исследования методом комбинационного рассеяния света / А. С. Крылов, Е. М. Мошкина, И. А. Гудим [и др.]> // Международная онлайн-конференция "Исследование сегнетоэлектрических материалов российскими учеными. Столетие открытия сегнетоэлектричества" (СЭ-100) : сб. тезисов / чл. прогр. ком. А. Н. Втюрин. - 2020. - Ст. П17. - С. 26-27. - Cited References: 7
. - ISBN 978-5-9500624-3-8 Перевод заглавия: Phase transitions in multiferroics with huntite structure containing rare earth elements - Raman spectroscopy study Аннотация: Изучены эффекты, связанные с параметрами структурного порядка и магнитного упорядочения при фазовых переходах в спектрах комбинационного рассеяния света монокристаллов и твердых растворов кристаллов (Hо-Nd)Fe3(BO3)4, (Sm-La)Fe3(BO3)4, Hо(Fe-Ga)3(BO3)4, Tb(Fe-Ga)3(BO3)4 и Nb(Fe-Ga)3(BO3)4.
Материалы конференции, Читать в сети ИФ Держатели документа: Институт физики им. Л.В. Киренского СО РАН Доп.точки доступа: Втюрин, Александр Николаевич \чл. прогр. ком.\; Vtyurin, A. N.; Крылов, Александр Сергеевич; Krylov, A. S.; Мошкина, Евгения Михайловна; Moshkina, E. M.; Гудим, Ирина Анатольевна; Gudim, I. A.; Крылова, Светлана Николаевна; Krylova, S. N.; Исследование сегнетоэлектрических материалов российскими учеными. Столетие открытия сегнетоэлектричества, международная онлайн-конференция(2020 ; 14-19 сент. ; Екатеринбург); Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина } Найти похожие
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Single crystal growth and the electronic structure of Rb2Na(NO3)3: Experiment and theory / K. E. Korzhneva, V. L. Bekenev, O. Y. Khyzhun [et al.]> // J. Solid State Chem. - 2021. - Vol. 294. - Ст. 121910, DOI 10.1016/j.jssc.2020.121910. - Cited References: 54. - This work was done on state assignment of IGM SB RAS, Ministry of Science and Higher Education of the Russian Federation; NSU BCH-2020-0036-4 (10988) (XRD analysis), and was supported by Russian Foundation for Basic Research (grants Nos. 18-32-00359 , 19-42-540012)
. - ISSN 0022-4596 Перевод заглавия: Рост монокристалла и электронная структура Rb2Na(NO3)3: эксперимент и теория Кл.слова (ненормированные): Double nitrates -- Crystal growth -- Electronic structure -- Nonlinear optical materials -- X-ray photoelectron spectroscopy Аннотация: Rb2Na(NO3)3 crystals demonstrate nonlinear optical properties and can be used as a converter of laser radiation in the shortwave region. The crystals were grown in the present work by the Bridgman–Stockbarger method in a ratio of 75 wt%(RbNO3) and 25 wt%(NaNO3). After the growth, a transparent centimeter size single crystal (6 cm long) was obtained for the first time that is very important for its practical application. The unit cell volume of double Rb2Na(NO3)3 nitrate is intermediate between the cell volumes of simple rubidium and sodium nitrates, RbNO3 and NaNO3. Electronic structure of Rb2Na(NO3)3 was studied in the present work from both experimental and theoretical viewpoints. In particular, employing X-ray photoelectron spectroscopy, we have measured binding energies of core electrons and energy distribution of the electronic states within the valence band region of the Rb2Na(NO3)3 crystal and established rather big binding energies for N 1s and O 1s core-level electrons. The bombardment of middle-energy Ar+ ions induces transformation of some nitrogen atoms of the analyzing topmost layers of the Rb2Na(NO3)3 crystal surface from the NO3– group to the NO2– group. To explore in detail the filling of the valence band of Rb2Na(NO3)3 by electronic states associated with constituting atoms, we use first-principles calculations within a density functional theory (DFT) framework. The DFT calculations reveal that O 2p states are the principal contributors to the valence band bringing the main input in its upper portion. The theoretical finding is supported experimentally by fitting the X-ray photoelectron valence band spectrum and the X-ray emission O Kα band on the total energy scale. The conduction band bottom of Rb2Na(NO3)3 is composed by unoccupied O 2p and N 2p states in almost equal proportion.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Novosibirsk State University, Novosibirsk, 630090, Russian Federation V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk, 630090, Russian Federation Frantsevych Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, 3 Krzhyzhanovsky StreetKyiv UA-03142, Ukraine Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation Доп.точки доступа: Korzhneva, K. E.; Bekenev, V. L.; Khyzhun, O. Y.; Goloshumova, A. A.; Tarasova, A. Y.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Isaenko, L. I.; Kurus, A. F. } Найти похожие
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Thermo-optic refraction in MoS2 medium for “Normally on” all optical switch / P. P. Shetty, M. Babu, D. N. Maksimov, J. Bingi> // Opt. Mater. - 2021. - Vol. 112. - Ст. 110777, DOI 10.1016/j.optmat.2020.110777. - Cited References: 25. - Authors acknowledge the funding support from DST India under INT/RUS/RFBR/P-262
. - ISSN 0925-3467 Кл.слова (ненормированные): Thermal lensing -- Optical modulation -- 2D nanomaterials -- All optical switch -- Thermal lens spectroscopy -- Thermal lensing Аннотация: Two dimensional (2D) nanomaterials like Molybdenum disulfide (MoS2) have been drawing a lot of interest due to their excellent nonlinear optical response. In this research we study thermal lens formation in MoS2 nanoflakes dispersion using mode mismatched pump probe configuration. Observation of the pump and probe beam intensity patterns gave visual insights on time evolution of photothermal lens formation. Effect of MoS2 nanoflakes concentration on thermo-optic properties of dispersions were studied using thermal lens spectroscopy technique. Further, a thermo-optic refraction based technique to measure thermal lens size is proposed. Thermal lens region size increased with increase in pump power. The observed thermal lens modulation is applied to demonstrate ‘normally on’ all optical switch which showed excellent modulation of output beam signal by pump beam.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Bio-inspired Research and Development (BiRD) Laboratory, Photonic Devices and Sensors (PDS) Laboratory, Indian Institute of Information Technology Design and Manufacturing (IIITDM), Kancheepuram, Chennai, 600127, India Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation Siberian Federal University, Krasnoyarsk, 660041, Russian Federation Доп.точки доступа: Shetty, P. P.; Babu, M.; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Bingi, J. } Найти похожие
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Втюрин, Александр Николаевич. Фазовый переход в каркасной металло-органической структуре DUT-8(Ni) под давлением – исследование методом комбинационного рассеяния / А. С. Крылов, I. Senkovska, S. Ehrling [и др.]> // Международная онлайн конференция "Исследование сегнетоэлектрических материалов российскими учеными. Столетие открытия сегнетоэлектричества" (СЭ-100) : сб. тез. конф. / чл. прогр. ком. А. Н. Втюрин. - 2020. - Ст. П3. - С. 7. - Cited References: 3
. - ISBN 978-5-9500624-3-8 Перевод заглавия: Raman spectroscopy analysis of the framework DUT-8(Ni) transition under hydrostatic pressure Аннотация: Методом комбинационного рассеяния исследована гибкая каркасная структура DUT-8(Ni) под давлением. Установлено, что индуцированная давлением трансформация открытой структуры в закрытую происходит, как фазовый переход первого рода. В некотором интервале давлений сосуществуют домены открытой и закрытой фаз.
Материалы конференции, Читать в сети ИФ Держатели документа: Институт физики им. Л.В. Киренского СО РАН Доп.точки доступа: Втюрин, Александр Николаевич \чл. прогр. ком.\; Vtyurin, A. N.; Крылов, Александр Сергеевич; Krylov, A. S.; Senkovska, I.; Ehrling, S.; Maliuta, M.; Крылова, Светлана Николаевна; Krylova, S. N.; Слюсарева, Евгения Алексеевна; Kaskel, S.; Исследование сегнетоэлектрических материалов российскими учеными. Столетие открытия сегнетоэлектричества, международная онлайн-конференция(2020 ; 14-19 сент. ; Екатеринбург); Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина } Найти похожие
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Ferroelastic phase transition in the family of double fluoride crystals by Raman spectroscopy / Y. V. Gerasimova, A. S. Krylov, A. N. Vtyurin [et al.]> // Ferroelectrics. - 2020. - Vol. 568, Is. 1. - P. 185-190DOI 10.1080/00150193.2020.1713348. - Cited References: 14. - This research is supported by Russian Foundation for Basic Research under Grant No. 17-02-00920
Перевод заглавия: Сегнетоэластический фазовый переход в семействе кристаллов двойных фторидов по данным спектроскопии комбинационного рассеяния света Кл.слова (ненормированные): Fluorides -- Raman spectra -- lattice disordering Аннотация: In order to clarify ordering mechanisms of ferroic phase transitions in double fluoride salts (NH4)3SnF7, (NH4)3GeF7 and (NH4)3TiF7, their Raman scattering spectra have been studied in wide ranges of frequencies (20–3400 cm−1) and temperatures (8–410 K). Substitution of the central ion in the octahedron groups was found to change not only the phase transition types and sequences, but to modify the types of structural disorder as well, which is a special feature of these high-symmetry fluoride crystals.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation Institute of Chemistry, Far Eastern Branch of RAS, Vladivostok, Russian Federation Доп.точки доступа: Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Laptash, N. M.; Krylova, S. N.; Крылова, Светлана Николаевна; European Meeting on Ferroelectricity(14 ; 2019 ; 14-19 July ; Lausanne, Switzerland) } Найти похожие
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Bikbaev, R. G. Hybrid Tamm and surface plasmon polaritons in resonant photonic structure / R. G. Bikbaev, S. Y. Vetrov, I. V. Timofeev> // J. Quant. Spectrosc. Radiat. Transf. - 2020. - Vol. 253. - Ст. 107156, DOI 10.1016/j.jqsrt.2020.107156. - Cited References: 58. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 19-42-240004 and by a joint project of the Russian Foundation for Basic Research, project No. 19-52-52006, and the Taiwan Ministry of Science and Technology, project No. 108-2923E-009-003-MY3
. - ISSN 0022-4073 Кл.слова (ненормированные): Tamm plasmon polariton -- Surface plasmon polariton -- Metal-dielectric nanocomposite -- Hybrid mode -- Optical sensor Аннотация: Hybrid modes originating from the coupling of the Tamm and surface plasmon polaritons excited in a one-dimensional resonant photonic structure are demonstrated. The structure represents a photonic crystal bounded by a nanocomposite film consisting of a transparent matrix and silver nanoparticles uniformly distributed over its volume. In comparison with structures on planar metal films the volume concentration and shape of nanoparticles are of great help in configuring the hybrid mode properties, including their wavelength and splitting. Also the radiation incidence angle variation opens the possibility of fine-tuning the energy spectra of the structure. We demonstrate the high-sensitivity of optical sensors based on the resonant photonic structure.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: L.V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS660036, Krasnoyarsk, Russian Federation Siberian Federal University660041, Krasnoyarsk, Russian Federation Доп.точки доступа: Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Бикбаев, Рашид Гельмединович } Найти похожие
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Temperature-dependent Raman spectroscopy, domain morphology and photoluminescence studies in lead-free BCZT ceramic / I. Coondoo, N. Panwar, S. Krylova [et al.]> // Ceram. Int. - 2021. - Vol. 47, Is. 2. - P. 2828-2838, DOI 10.1016/j.ceramint.2020.09.137. - Cited References: 65. - I.C. would like to thank financial assistance by national funds (OE), through FCT – Fundação para a Ciência e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology / MCTES . The authors would also like to acknowledge the Ural Center for Shared Use “Modern nanotechnology”, Ural Federal University, Russia and the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”. The authors would like to thank Dr. E. Venkata Ramana, Department of Physics, University of Aveiro for the dielectric measurements. The work was supported by Government of the Russian Federation (Act 211, 440 Agreement 02.A03.21.0006)
. - ISSN 0272-8842 Кл.слова (ненормированные): Lead-free ceramics -- Raman spectroscopy -- Domain morphology -- Photoluminescence Аннотация: Present work focuses on detailed temperature-dependent X-ray diffraction, Raman scattering, domain configuration, and photoluminescence (PL) studies in the (Ba0·85Ca0.15) (Zr0·10Ti0.90)O3 (BCZT) ceramics. The comprehensive Raman spectroscopy analysis in the present work not only validates the presence of the intermediate orthorhombic phase in BCZT, but also provides evidence of another transition: rhombohedral R3c phase to R3m at low temperature. Temperature behaviour of the lowest frequency transverse optical mode (soft E (TO) phonon) and hard modes was studied. Temperature dependence of peak positions, intensities, and linewidths of Raman phonon modes signalled the presence of phase transitions near −50 ± 5 °C, 0±5 °C, 35±5 °C and 110 ± 10 °C. Evolution of domain morphology occurring at phase transitions above room temperature was studied by piezoresponse force microscopy technique. Analysis of PL spectra revealed disorder/heterogeneity in the sample and indicated the existence of self-trapped excitons. PL spectra are composed of four distinct colour components (~2.55eV:blue, ~2.32eV:green, ~2.08eV:orange and ~1.78eV:red).
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Department of Physics & CICECO – Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal Department of Physics, Central University of Rajasthan, BandarsindriRajasthan 305817, India Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk660036, Russian Federation School of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg620026, Russian Federation I3N-Aveiro, Department of Physics, University of Aveiro, Aveiro, 3810-193, Portugal Доп.точки доступа: Coondoo, I.; Panwar, N.; Krylova, S. N.; Крылова, Светлана Николаевна; Krylov, A. S.; Крылов, Александр Сергеевич; Alikin, D.; Jakka, S. K.; Turygin, A.; Shur, V. Y.; Kholkin, A. L. } Найти похожие
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The structure of the metastable K18Ta5Zr5F63 phase / M. Boca, M. Molokeev, A. Rakhmatullin [et al.]> // New J. Chem. - 2020. - Vol. 44, Is. 22. - P. 9264-9270, DOI 10.1039/d0nj02428g. - Cited References: 30. - Financial support from TGIR-RMN-THC Fr3050 CNRS for conducting the research is gratefully acknowledged. This work was supported by the Slovak Research and Development Agency under the contract no. APVV-15-0479. This work was financially supported by the Scientific Grant Agency of the Ministry of Education of the Slovak Republic and the Slovak Academy of Sciences, grant no. Vega 2/0024/20
. - ISSN 1144-0546 Перевод заглавия: Струкрута метастабильной фазы K18Ta5Zr5F63 Кл.слова (ненормированные): Fluorine compounds -- Geometry -- Nuclear magnetic resonance spectroscopy -- Prisms Аннотация: A metastable phase K18Ta5Zr5F63 was prepared by molten salt synthesis of K2TaF7 and K2ZrF6 in a sealed Pt crucible. This is the first example of a structure of a fluoride complex compound containing both tantalum and zirconium as central atoms. The asymmetric part of the unit cell contains two Ta/Zr sites and one pure Zr site. The Ta1/Zr1 ion is coordinated by seven F ions forming one capped trigonal prism. The Ta2/Zr2 ion is coordinated by six F ions forming a trigonal prism, and this polyhedron is fully ordered. The Zr3 ion is coordinated by six F ions, which are disordered over two positions. All (Zr/Ta)Fn (n = 6–8) polyhedra are isolated from each other, although the ZrF6 units have shared faces, forming an infinite channel along the c-axis. 19F MAS NMR experiments agree with the proposed structural model, identifying all five central non-equivalent polyhedra. The K18Ta5Zr5F63 phase decomposes within several months to its initial components; this can be monitored by NMR, DSC and XRD experiments. Moreover, accelerated decomposition can be achieved by thermal treatment, resulting in the formation of a K3ZrF7 phase.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava, SK-845 36, Slovakia Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50 bld. 38, Krasnoyarsk, 660036, Russian Federation Siberian Federal University, Krasnoyarsk, 660041, Russian Federation Conditions Extremes et Materiaux, Haute Temperature et Irradiation, 1D avenue de la Recherche Scientifique CS 90055, Orleans Cedex 2, 45071, France Доп.точки доступа: Boca, M.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Rakhmatullin, A.; Kubikova, B.; Netriova, Z. } Найти похожие
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X-ray transient absorption spectroscopy by an ultrashort x-ray-laser pulse in a continuous-wave IR field / X. Shi, Y. Wu, J. G. Wang [et al.]> // Phys. Rev. A. - 2020. - Vol. 101, Is. 2. - Ст. 023401, DOI 10.1103/PhysRevA.101.023401. - Cited References: 56. - Grants from the National Basic Research Program of China (Grant No. 2017YFA0403200), National Natural Science Foundation of China (Grants No. 11604197, No. 11934004, and No. 11974230), the Science Challenge Program of China (Grants No. TZ2018005 and No. TZ2016005), and the Organization Department of CCCPC are acknowledged. V.K. acknowledges financial support from Swedish Research Council within the State Contract of the Ministry of Education and Science of the Russian Federation for Siberian Federal University for Scientific Research in 2017-2019 (Project No. 3.2662.2017)
. - ISSN 2469-9926. - ISSN 2469-9934РУБ Optics + Physics, Atomic, Molecular & Chemical Рубрики: MOLECULAR NITROGEN TIME DYNAMICS PHASE SPECTRA DECAY Аннотация: X-ray transient absorption spectra (XTAS) of molecules are theoretically investigated in a femtosecond x-ray pump and continuous-wave (cw) infrared (IR)-control scenario. The scheme is exemplified by a CO molecule resonantly pumped into carbon and oxygen core-excited 1s→π∗ states by a weak femtosecond x-ray pulse, while dynamic Stark shifts are induced by the cw IR-control radiation. As a result, significant shoulder structures appear in XTAS showing strong dependence on the phase of IR radiation relative to the envelope of the x-ray pulse. Due to a significant difference in the frequencies of the two pulses, the present XTAS scheme provides much clear interpretation of the dynamic Stark effects as compared to the attosecond UV transient absorption scenario. Within the suggested two-level model, where the total spectrum is decomposed as incoherent superposition of contributions from different vibrational excitations weighted by the Franck-Condon Factors, all spectral structures can be well identified and interpreted in a good agreement with the full-scale molecular simulations. Well-characterized XTAS in the proposed IR-control scheme can be applied for fine phase synchronization between IR and x-ray pulses, highly demanded in modern experiments on x-ray free-electron lasers.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China. Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China. Peking Univ, Ctr Appl Phys & Technol, Beijing 100084, Peoples R China. Royal Inst Technol, Theoret Chem & Biol, S-10691 Stockholm, Sweden. Siberian Fed Univ, Krasnoyarsk 660041, Russia. Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia. Доп.точки доступа: Shi, Xin; Wu, Yong; Wang, Jian Guo; Kimberg, V.; Кимберг, Виктор Валерьевич; Zhang, Song Bin } Найти похожие
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Aplesnin, S. S. Magnetic capacitance in variable-valence manganese sulfides / S. S. Aplesnin, A. M. Kharkov, G. Y. Filipson> // Phys. Status Solidi B. - 2020. - Vol. 257, Is. 5. - Ст. 1900637, DOI 10.1002/pssb.201900637. - Cited References: 12. - This study was supported by the Russian Foundation for Basic Research No. 18-32-00079 mol_a. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science No. 18-42-240001 r_a
. - ISSN 0370-1972 Кл.слова (ненормированные): Debye model -- infrared spectroscopy -- magnetocapacitance -- permittivity -- relaxation time Аннотация: The permittivity of TmxMn1–xS (0 < x < 0.15) solid solutions is measured in the frequency range of 102–106 Hz at temperatures of 300–500 K in magnetic fields of up to 12 kOe. The migration and relaxation conductivity contributions to the electric polarization are established. The relaxation time and activation energy are calculated using the Debye model. A decrease in the capacitance and relaxation time in a magnetic field is observed. The electron polarization relaxation channel provided by recombination of the electron–hole pairs is found using the infrared spectroscopy investigations.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50 bld. 38, Krasnoyarsk, 660036, Russian Federation Institute of Space Technology, Reshetnev Siberian State University of Science and Technology, Krasnoyarskiy rabochiy Ave., 31, Krasnoyarsk, 660037, Russian Federation Доп.точки доступа: Kharkov, A. M.; Filipson, G. Y.; Аплеснин, Сергей Степанович } Найти похожие
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Gallium composition-dependent structural phase transitions in HoFe3-xGax(BO3)4 solid solutions: crystal growth, structure, and Raman spectroscopy study / E. Moshkina, S. Krylova, I. Gudim [et al.]> // Cryst. Growth Des. - 2020. - Vol. 20, Is. 2. - P. 1058-1069, DOI 10.1021/acs.cgd.9b01387. - Cited References: 30. - The reported study was funded by the Russian Foundation for Basic Research No. 18-02-00754. The experiments were performed using equipment of Center for Common Use, Krasnoyarsk Scientific Center, FSC SB RAS
. - ISSN 1528-7483 Перевод заглавия: Структурные фазовые переходы по концентрации галлия в твердых растворах HoFe3-xGax(BO3)4: рост кристаллов, структура и комбинационное рассеяние Кл.слова (ненормированные): Crystal growth -- Crystal structure -- Density functional theory -- Gallium -- Gallium compounds -- Iron compounds -- Raman scattering -- Solid solutions -- X ray powder diffraction Аннотация: Single crystals of solid solutions of HoFe3–xGax(BO3)4 with x = 0, 0.5, 1, 1.5, and 3 were obtained using flux synthesis. The conditions of the synthesis are described in detail. The structural properties of each of the synthesized samples were studied using X-ray powder diffraction analysis at several temperature points (303, 403, and 503 K). The structural parameters of the obtained samples and the “pure” compounds HoFe3(BO3)4 and HoGa3(BO3)4 were compared. The Raman spectra of the obtained solid solutions HoFe3–xGax(BO3)4 were studied in a wide temperature range (T = 10–400 K). The vibrational spectra and eigenvectors of the HoFe3Ga(BO3)4 and HoGa3(BO3)4 in R32 phase and HoFe3Ga(BO3)4 in P3121 phase were calculated within density functional theory. The features of the Raman spectra of HoFe2Ga(BO3)4, HoFe2.5Ga0.5(BO3)4, HoFe3(BO3)4 crystals associated with the R32 → P3121 structural phase transition, which have a strong dependence on the degree of substitution x, were investigated. Peculiarities of the Raman spectra, which are associated with magnetic ordering in HoFe1.5Ga1.5(BO3)4, HoFe2Ga(BO3)4, and HoFe2.5Ga0.5(BO3)4 crystals, were detected.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation Siberian Federal University, Krasnoyarsk, 660041, Russian Federation Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation Доп.точки доступа: Moshkina, E. M.; Мошкина, Евгения Михайловна; Krylova, S. N.; Крылова, Светлана Николаевна; Gudim, I. A.; Гудим, Ирина Анатольевна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Pavlovskiy, M. S.; Павловский, Максим Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич } Найти похожие
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Magnetic structure of ErFe3(BO3)4: Spectroscopic and thermodynamic studies / E. A. Popova, E. P. Chukalina, K. N. Boldyrev [et al.]> // J. Magn. Magn. Mater. - 2020. - Vol. 500. - Ст. 166374, DOI 10.1016/j.jmmm.2019.166374. - Cited References: 14. - E.P.Ch., and K.N.B. acknowledge a financial support of the Russian Science Foundation under Grant # 19-12-00413. The calculational part of the article was prepared by . E.A.P. within the framework of the Academic Fund Program at the National Research University Higher School of Economics (HSE University) in 2019 (grant №19-04-030) and by the Russian Academic Excellence Project «5-100»
. - ISSN 0304-8853 Кл.слова (ненормированные): Erbium iron borate -- High-resolution optical spectroscopy -- Modeling of magnetic properties Аннотация: We report on the high-resolution spectroscopic study of multiferroic ErFe3(BO3)4. The energies of all eight Kramers doublets of the ground 4I15/2 multiplet of the Er3+ ion were determined by the high-resolution 4I13/2 → 4I15/2 infrared luminescence spectra. The spectroscopically determined temperature dependence of the splitting of the ground Kramers doublet was used to calculate the contribution of the erbium subsystem into the specific heat and the magnetic susceptibility of erbium iron borate. The analysis of the thermodynamic properties based on these calculations allowed us to suggest the domain structure in the easy-plane antiferromagnetically ordered iron subsystem, with two magnetically nonequivalent erbium positions in each domain.
Смотреть статью, Scopus, WOS, Читать в сети ИФ Держатели документа: National Research University Higher School of Economics, Moscow, 101000, Russian Federation Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, 108840, Russian Federation Moscow Institute of Physics and Technology (National Research University), Dolgoprudnyi, 141701, Russian Federation Kirenskiy Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, 660036, Russian Federation Доп.точки доступа: Popova, E. A.; Chukalina, E. P.; Boldyrev, K. N.; Jablunovskis, A.; Gudim, I. A.; Гудим, Ирина Анатольевна } Найти похожие
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