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1.


   
    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.

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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.
}
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2.


   
    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.

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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.
}
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3.


   
    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 1361-6455
РУБ 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.

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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]
}
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4.


   
    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.

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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.
}
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5.


   
    Mode coupling in arrays of Al nanoparticles / A. E. Ershov, V. S. Gerasimov, R. G. Bikbaev [et al.] // J. Quant. Spectrosc. Radiat. Transf. - 2020. - Vol. 248. - Ст. 106961, DOI 10.1016/j.jqsrt.2020.106961. - Cited References: 81. - The reported study was funded by the grant of the President of Russian Federation (agreement 075-15-2019-676 ); the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (Grant No.18-42-240013); the State contract with Siberian Federal University for scientific research; Russian Science Foundation project number 19-72-00066 (investigation of finite size effects) . - ISSN 0022-4073
Кл.слова (ненормированные):
Plasmonics -- Aluminum -- Surface lattice resonances
Аннотация: The mechanisms of coupling between the lattice modes of a two-dimensional (2D) array consisting of Al nanoparticles and the localized modes of individual Al nanoparticles have been studied in detail. The results were obtained employing the finite-difference time-domain method (FDTD) and the generalized Mie theory. It was shown that interactions of single particles with 2D lattice modes significantly change the extinction spectra depending on the particle radius and the lattice period. The Rayleigh anomalies of higher orders contribute to formation of hybrid modes resulting in increase of the extinction efficiency in short wavelength range of the spectrum. It was shown that high intensity magnetic modes are excited in aluminum nanoparticles arrays. The patterns of spatial electromagnetic field distribution at the frequencies of hybrid modes have been studied. We note that comprehensive understanding the mode coupling mechanisms in arrays paves the way for engineering different types of modern photonic devices with controllable optical properties.

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Держатели документа:
Institute of Computational Modeling SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
L.V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technology, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Ershov, A. E.; Gerasimov, V. S.; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Polyutov, S. P.; Karpov, S. V.; Карпов, Сергей Васильевич
}
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6.


   
    Temperature dependence of the spontaneous polarization, acoustic and strain anomalies in strontium barium niobate crystals of different chemical compositions probed by the second harmonic generation technique / A. M. Pugachev, I. V. Zaytseva, V. K. Malinovsky [et al.] // Ferroelectrics. - 2020. - Vol. 560, Is. 1. - P. 54-60, DOI 10.1080/00150193.2020.1722883. - Cited References: 19. - This work was supported by the Russian Foundation for Basic Research, projects no. 18-02-00399 and 19-42-543-016 and State assignment No AAAA-A17-117052410033-9. . - ISSN 0015-0193. - ISSN 1563-5112
РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
   RELAXOR

   GROWTH

Кл.слова (ненормированные):
SBN-x crystals -- polar regions -- ferroelectric phase transition -- second harmonic generation -- Brillouin spectroscopy
Аннотация: In SrxBa1-xNb2O6 crystals (x = 0.33, 0.5, 0.61, and 0.75), temperature dependences of spontaneous polarization, strain, elastic modules, and second harmonic generation (SHG) signal are compared. It is revealed that SHG describes the temperature dependences of dipole moments in polar nanoregions in paraelectric phase. In the vicinity of the phase transition in paraelectric phase, SHG reflects the temperature behavior of relatively large and long-lived polar asymmetric regions as indicated by the presence of the intermediate temperature range on the temperature dependence of this nonlinear response.

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Держатели документа:
Russian Acad Sci, Inst Automat & Electrometry, Novosibirsk, Russia.
Kirensky Inst Phys Fed Res Ctr KSC SB RAS, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk, Russia.
Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow, Russia.

Доп.точки доступа:
Pugachev, A. M.; Zaytseva, I., V; Malinovsky, V. K.; Surovtsev, N., V; Gorev, M. V.; Горев, Михаил Васильевич; Ivleva, L. I.; Lykov, P. A.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-02-00399, 19-42-543-016, AAAA-A17-117052410033-9]
}
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7.


   
    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.

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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.
}
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8.


   
    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 свойства
РУБ 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.

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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]
}
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9.


    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.

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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
}
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10.


   
    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).

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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.
}
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11.


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.

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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
}
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12.


   
    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.

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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)
}
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13.


   
    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@Au
РУБ 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.

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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.
}
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14.


   
    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 1097-4555
РУБ 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.

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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]
}
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15.


    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

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Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Крылов, Александр Сергеевич
}
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16.


    Plotnikova, A. A.
    Structural Characteristics and Processability of Sphalerite in Lead-Zinc Ore of the Gorevka Deposit / A. A. Plotnikova, V. I. Bragin, Y. V. Knyazev // J. Min. Sci. - 2019. - Vol. 55, Is. 6. - P. 995-1006, DOI 10.1134/S1062739119066381. - Cited References: 33 . - ISSN 1062-7391. - ISSN 1573-8736
РУБ Mining & Mineral Processing

Кл.слова (ненормированные):
Lead-zinc ore -- iron-bearing sphalerite -- pyrrhotine -- X-ray phase analysis -- micro-X-ray spectrum analysis -- high-gradient separation -- Mossbauer spectroscopy
Аннотация: The theoretical and experimental substantiation of the behavior of ferrous sphalerite in magnetic separation is given in terms of the Gorevka deposit ore. In sphalerite of this deposit, the content of isomorphous iron ranges as 4-9%. The Mossbauer spectroscopy showed the singlet and two doublet lines of iron, demonstrating separate arrays of iron atoms in sphalerite lattice, with formation of Fe-Fe pairs and clusters of three or more iron atoms. It is found that distribution of iron in sphalerite into three forms coincides for magnetic and nonmagnetic products of zinc concentrate separation. It is determined that magnetic separation undivides sphalerite grains by the isomorphous iron content but is governed by the genetic features of the deposit formation-association of sphalerite with magnetic minerals (pyrrhotine and siderite) and the absence of such associations in galena.

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Публикация на русском языке Плотникова А. А. Структурно-технологические характеристики сфалерита в свинцово-цинковых рудах Горевского месторождения [Текст] / А. А. Плотникова, В. И. Брагин, Ю. В. Князев // Физ.-техн. проблемы разраб. полез. ископаемых. - 2019. - № 6. - С. 152-164

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kiriensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Bragin, V. I.; Knyazev, Yu. V.; Князев, Юрий Владимирович
}
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17.


    Lundin, A. A.
    Multiple-quantum NMR spectroscopy and quantum information delocalization in solids in the presence of magnetic fields inhomogeneities / A. A. Lundin, V. E. Zobov // International Conference “Magnetic Resonance – Current State and Future Perspectives” (EPR-75) : book of abstracts. - Kazan, 2019. - P. 30. - Cited References: 5

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

Доп.точки доступа:
Zobov, V. E.; Зобов, Владимир Евгеньевич; Лундин, Андрей Арнольдович; "Magnetic Resonance - Current State and Future Perspectives", International Conference(2019 ; Sept. ; 23-27 ; Kazan, Russia); Казанский (Приволжский) федеральный университет; Казанский физико-технический институт им. Е. К. Завойского Казанского научного центра РАН
}
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18.


   
    Crystal structure and structural phase transition in bis­muth-containing HoFe3(BO3)4 in the temperature range 11–500 K / E. S. Smirnova, O. A. Alekseeva, A. P. Dudka [et al.] // Acta Crystallogr. B. - 2019. - Vol. 75. - P. 954-968, DOI 10.1107/S2052520619010473. - Cited References: 37. - The authors are grateful to D. Yu. Chernyshov (SNBL, ESRF, Grenoble) for his assistance in obtaining the experimental data. This work was performed using the equipment of the Shared Research Center FSRC ‘Crystallography and Photonics’ RAS and was supported by the Russian Ministry of Education and Science (project RFMEFI62119X0035). - This work was supported by the Ministry of Science and Higher Education within the State assignment FSRC ‘Crystallography and Photonics’ RAS and partially by the Russian Foundation for Basic Research (grant No. 17-02-00766) . - ISSN 2052-5192
Кл.слова (ненормированные):
holmium iron borate -- crystal structure -- structural phase transition -- Mossbauer spectroscopy -- characteristic temperatures
Аннотация: An accurate single-crystal X-ray diffraction study of bis­muth-containing HoFe3(BO3)4 between 11 and 500 K has revealed structural phase transition at Tstr = 365 K. The Bi atoms enter the composition from Bi2Mo3O12-based flux during crystal growth and significantly affect Tstr. The content of Bi was estimated by two independent methods, establishing the composition as (Ho0.96Bi0.04)Fe3(BO3)4. In the low-temperature (LT) phase below Tstr the (Ho0.96Bi0.04)Fe3(BO3)4 crystal symmetry is trigonal, of space group P3121, whereas at high temperature (HT) above 365 K the symmetry increases to space group R32. There is a sharp jump of oxygen O1 (LT) and O2 (LT) atomic displacement parameters (ADP) at Tstr. O1 and O2 ADP ellipsoids are the most elongated over 90–500 K. In space group R32 specific distances decrease steadily or do not change with decreasing temperature. In space group P3121 the distortion of the polyhedra Ho(Bi)O6, Fe1O6 and Fe2O6, B2O3 and B3O3 increases with decreasing temperature, whereas the triangles B1O3 remain almost equilateral. All BO3 triangles deviate from the ab plane with decreasing temperature. Fe–Fe distances in Fe1 chains decrease, while distances in Fe2 chains increase with decreasing temperature. The Mössbauer study confirms that the FeO6 octahedra undergo complex dynamic distortions. However, all observed distortions are rather small, and the general change in symmetry during the structural phase transition has very little influence on the local environment of iron in oxygen octahedra. The Mössbauer spectra do not distinguish two structurally different Fe1 and Fe2 positions in the LT phase. The characteristic temperatures of cation thermal vibrations were calculated using X-ray diffraction and Mössbauer data.

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Держатели документа:
Shubnikov Inst. of Cristal. of Federal Scientific Research Centre Crystallography and Photonics, Russian Academy of Sciences, Moscow, 119333, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Smirnova, E. S.; Alekseeva, O. A.; Dudka, A. P.; Khmelenin, D. N.; Frolov, K. V.; Lyubutina, M. V.; Gudim, I. A.; Гудим, Ирина Анатольевна; Lyubutin, I. S.
}
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19.


   
    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.

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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
}
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20.


   
    Spin excitations of TmFeO3 studied by high-resolution neutron spectroscopy / S. A. Skorobogatov [и др.] // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст. J.P52. - P. 281. - Cited References: 5 . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Institut für Festkörper und Materialphysik, Technische Universität Dresden, Dresden, Germany
Siberian Federal University, Krasnoyarsk, Russia
Neutron Technologies Division, Oak Ridge National Laboratory, USA
Neutron Scattering Division, Oak Ridge National Laboratory, USA

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Skorobogatov, S. A.; Nikitin, S. E.; Никитин, С.Е.; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Pavlovskii, N. S.; Павловский, Николай Сергеевич; Ehlers, G.; Abernathy, D.; Podlesnyak A. A.; Подлесняк А. А.; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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