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Neutron diffraction measurements of the FexMn1-xS solid solutions [Text] / G. A. Abramova, M. Boehm, B. Roessli [et al.] // 4th European conference on neutron scattering : Lund, Sweden, 25-29 June 2007 : [сб. тезисов]. - p. 128

Доп.точки доступа:
Abramova, G. A.; Boehm, M.; Roessli, B.; Raseh, J.; Petrakovskiy, G. A.; Петраковский, Герман Антонович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Bovina, A. F.; Бовина, Ася Федоровна; Sokolov, V. V.; Соколов, Валерий Владимирович; European conference on neutron scattering(4 ; 2007 ; June ; Lund, Sweden)
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Nonlinear diffraction and random QPM in strontium tetraborate / Aleksandrovsky A.S., Shakhura I.E., Vyunyshev A.M., Zaitsev A.I., Zamkov A.V. // 4th International Conference on Advanced Optoelectronics and Lasers (CAOL 2008), Sept. 29 2008-Oct. 4, 2008,Alushta, Crimea, Ukraine, p.398

Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Shakhura, I. E.; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр, Иванович; Zamkov, A. V.; Замков, Анатолий Васильевич
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    Solid state synthesis, structural, DFT and spectroscopic analysis of EuAl3(BO3)4 / A. S. Oreshonkov, A. S. Aleksandrovsky, O. D. Chimitova [et al.] // Mater. Chem. Phys. - 2024. - Vol. 320. - Ст. 129400, DOI 10.1016/j.matchemphys.2024.129400. - Cited References: 55. - The work was carried out within the state assignment No FWES-2024-0003 of Kirensky Institute of Physics. This work was partially supported by the state order of BINM SB RAS (0273-2021-0008). The samples for this research were synthesized using equipment of the CCU BINM SB RAS. The reflectance spectrum was obtained at the Center for Optical and Laser Materials Research of Research park of St. Petersburg State University. The SEM measurements were performed at Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" . - ISSN 0254-0584. - ISSN 1879-3312
   Перевод заглавия: Твердофазный синтез, структурный, квантово-химический (DFT) и спектроскопический анализ EuAl3(BO3)4
Кл.слова (ненормированные):
EuAl(BO) -- Huntite -- X-ray diffraction -- SEM -- DFT -- Charge transfer -- Raman -- Infrared -- Luminescence
Аннотация: Huntite-like borates are versatile and promising materials with wide range of applications in frequency conversion, UV light generation, lighting, displays, quantum information storage, and more, demonstrated by their various properties and uses in scientific research. In this work, EuAl3(BO3)4 powder was prepared through multi-stage solid-state reaction method using high-purity starting reagents: Eu2O3, Al2O3 and H3BO3, considering a 20 wt% excess of H3BO3 to compensate for B2O3 volatilization. Obtained samples undergo several treatments at varying temperatures and their phase purity is subsequently verified through powder X-ray diffraction analysis. The scanning electron microscopy reveals that resulting EuAl3(BO3)4 powder consists of granules exhibiting irregular morphologies with dimensions of 0.5–8 μm. The electronic band structure of EuAl3(BO3)4, calculated using the GGA PBE method, reveals f-states of Eu near 4 eV. These states do not produce emphasized peaks on simulated absorbance spectra. Using of DFT + U for the f-states of Eu pushed up f-bands above 6 eV and the charge transfer from p-O to d-Eu was obtained (Egdirect = 5.63 eV, Egindirect = 5.37 eV using Ueff = 4 eV). The variation of Ueff has a weak influence on the position of the bottom of the conduction band. The experimental bandgaps of EuAl3(BO3)4 crystalline powder, both direct and indirect, are found to be 3.96 and 3.67 eV, correspondingly. These values are lower than theoretical values what is associated with limitations of DFT calculations involving f electrons. The Raman spectrum of EuAl3(BO3)4 powder is discussed, detailing the contributions of different ions to specific spectral bands. Investigation of high-resolution luminescence spectra shows the possibility to estimate the content of defects by the testing the violation of the prohibition of ultranarrow 5D0 → 7F0 line that is forbidden in the ideal crystalline structure of trigonal EuAl3(BO3)4.

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Держатели документа:
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
School of Engineering and Construction, Siberian Federal University, Krasnoyarsk, 660041, Russia
Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russia
Laboratory of Oxide Systems, Baikal Institute of Nature Management, SB RAS, Ulan-Ude, 670047, Russia
Center for Optical and Laser Materials Research, Saint-Petersburg State University, Saint-Petersburg, 199034, Russia
Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, Moscow, 119334, Russia
Plekhanov Russian University of Economics, Moscow, 117997, Russia
Moscow Institute of Physics and Technology, Dolgoprudny, 141700, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
School of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russia
Institute of Automation and Electrometry, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Department of Molecular Electronics, Federal Research Center Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
Institute of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, 660041, Russia

Доп.точки доступа:
Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Chimitova, O.D.; Pankin, D.V.; Popov, Z.I.; Sukhanova, E.V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Adichtchev, S.V.; Pugachev, A.M.; Nemtsev, I. V.; Немцев, Иван Васильевич
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Synthesis, structure and magnetic properties of monoclinic lanthanum-chromium borate LaCr3(BO3)4 / E. A. Volkova, M. S. Platunov, A. M. Antipin [et al.] // J. Alloys Compd. - 2024. - Vol. 994. - Ст. 174683, DOI 10.1016/j.jallcom.2024.174683. - Cited References: 38. - Single crystal X-ray analysis was carried out within the State assignment NRC "Kurchatov institute" (research contribution of A.M.A.). The research contribution of M.S.P. was partially supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Synchrotron radiation facility "SKIF", Boreskov Institute of Catalysis (project FWUR-2024–0040) . - ISSN 0925-8388. - ISSN 1873-4669
Кл.слова (ненормированные):
Borates -- Flux growth -- Crystal structure -- Differential scanning calorimetry -- Powder X-ray diffraction -- IR spectroscopy -- Antiferromagnet
Аннотация: Single crystals of LaCr3(BO3)4 were synthesized through spontaneous nucleation from a K2Mo3O10 flux melt. The crystal structure was determined using single-crystal X-ray diffraction (XRD) at temperatures of 293 K and 85 K. LaCr-borate crystallizes in the monoclinic C2/c space group with unit cell parameters a = 7.47980(5) Å, b = 9.55180(7) Å, c = 11.48330(8) Å, β= 104.0060(6)°, V = 796.04(1) Å3 (for C1, T = 293 K), and a = 7.47380(5) Å, b = 9.55520(7) Å, c = 11.47100(8) Å, β = 103.9330(6)°, V = 795.08(1) Å3 (for C2, T = 85 K), each with Z = 4. The temperature dependence of the unit cell parameters, including the monoclinic angle (β) and the unit cell volume (V), was investigated over the range of 85–293 K. No structural phase transitions were observed in the low-temperature region down to 85 K. Differential scanning calorimetry (DSC) measurements revealed no high-temperature phase transitions between 50 and 1350°C. Infrared (IR) spectroscopy confirmed the monoclinic structure of LaCr3(BO3)4 crystals, revealing characteristic absorption bands, including the lowest frequency mode associated with the translational vibrations of the La3+ ion.

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Держатели документа:
Faculty of Geology, Lomonosov Moscow State University, Moscow, Russian Federation
Synchrotron radiation facility SKIF, Boreskov Institute of Catalysis SB RAS, Kol’tsovo, Russian Federation
Shubnikov Institute of Crystallography, Complex "Crystallography and Photonics", NRC "Kurchatov institute", Moscow, Russian Federation
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
Melnikov Research Institute of Comprehensive Exploitation of Mineral Resources of the Russian Academy of Sciences, Moscow, Russian Federation

Доп.точки доступа:
Volkova, E. A.; Platunov, M. S.; Платунов, Михаил Сергеевич; Antipin, A. M.; Alpanova, R. R.; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Pyastolova, Yu. V.; Пястолова, Юлия Валентиновна; Podobraznyh, A. D.; Kosorukov, V. L.; Koporulina, E. V.; Maltsev, V. V.
}
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Vyunishev, A. M.
Cherenkov second harmonic generation of femtosecond laser pulses in a homogeneous nonlinear crystal / A. M. Vyunishev, A. S. Chirkin // Laser Phys. - 2024. - Vol. 34, Is. 8. - Ст. 085402, DOI 10.1088/1555-6611/ad5156. - Cited References: 37 . - ISSN 1054-660X. - ISSN 1555-6611
Кл.слова (ненормированные):
second harmonic generation -- nonlinear diffraction -- nonlinear Cherenkov radiation -- femtosecond laser pulses
Аннотация: In experiments on second harmonic (SH) generation (SHG), a conical structure of radiation has been observed. In the present study, a non-stationary theory of SH excitation of ultrashort laser pulses with phase modulation has been developed, which explains the properties of such a structure as Cherenkov radiation. Under phase-mismatched interactions, a maximum of the SH spectrum is observed at the Cherenkov angle, which is determined by the ratio of the SH and laser radiation phase velocities. It is shown that tightly focused laser beams are preferred to observe Cherenkov SHG. The SH spectral width depends on the group velocity mismatch and is more complicated on the excited radiation spectrum. The SH energy can be proportional to the crystal length or group delay length depending on their ratio. We also demonstrate that a complex angular distribution of spectral components (an angular chirp) appears within the SH cross-section.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Photonics and Laser Technology, Siberian Federal University, Krasnoyarsk 660079, Russia
M.V. Lomonosov Moscow State University, Moscow 119991, Russia

Доп.точки доступа:
Chirkin, A. S.; Вьюнышев, Андрей Михайлович
}
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Altunin, R. R.
Kinetics of diffusion and phase formation in a solid-state reaction in Al/Au thin films / R. R. Altunin, E. T. Moiseenko, S. M. Zharkov // J. Alloys Compd. - 2024. - Vol. 1002. - Ст. 175500, DOI 10.1016/j.jallcom.2024.175500. - Cited References: 83. - This work was supported by the Russian Science Foundation (grant # 22-13-00313) . - ISSN 0925-8388. - ISSN 1873-4669
Кл.слова (ненормированные):
Thin films -- Solid-state reaction -- Al-Au intermetallic compounds -- In situ electron diffraction -- Phase transformation -- Kinetics
Аннотация: The kinetics of diffusion and formation of Al-Au intermetallic compounds in a solid-state reaction between layers of aluminum and gold has been studied by the method of in situ electron diffraction. The phase sequence in the solid-state reaction in Al/Au thin films is found to depend on the atomic ratio of aluminum and gold at the initial state. Specifically, with the atomic ratio being Al:Au=2:1, one observes the formation sequence: Al3Au8→AlAu2→Al2Au, while with the ratio Al:Au=1:4, the sequence is Al3Au8→AlAu4. The observed change in the sequence is explained using the theoretical model of EHF (Effective Heat of Formation). The kinetic parameters of the diffusion of gold through the layer of reaction products in the Al/Au thin films have been determined, including the apparent activation energy of the diffusion Ea=1.17 eV and pre-exponential factor D0=120 cm2/s. Based on the data obtained by in situ electron diffraction, the kinetic parameters of the phase formation have been estimated by the Kissinger-Akahira-Sunose method. In addition, the kinetic parameters of the formation of the Al-Au intermetallic compounds have been determined (apparent activation energy Ea, pre-exponential factor A) in the solid-state reaction in the Al/Au thin films, namely, Ea = 0.77 eV, log(A, s−1) = 9 for Al3Au8; Ea = 1.08 eV, log(A, s−1) = 13 for AlAu2; Ea = 1.13 eV, log(A, s−1) = 13 for Al2Au; and Ea = 1.35 eV, log(A, s−1) = 16 for the phase AlAu4. The kinetic parameters of the formation of the AlAu4 phase have been estimated for the first time.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Moiseenko, E. T.; Zharkov, S. M.; Жарков, Сергей Михайлович
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    Soldatenko, A. S.
    N-silylmethyl-2-(1-naphthyl)acetamides: Synthesis, structure and computational screening / A. S. Soldatenko, M. S. Molokeev, N. F. Lazareva // Curr. Org. Chem. - 2024. - Vol. 28, Is. 12. - P. 959-966, DOI 10.2174/0113852728296495240409062733. - Cited References: 75. - This work was supported by the Russian Science Foundation using the analytical equipment of the Baikal Center for Collective Use of the SB RAS and the analytical equipment of the Krasnoyarsk Center for Collective Use of SB RAS. M.S. Molokeev’s work was carried out within the framework of the Strategic Academic Leadership Program "Priority-2030" for the Siberian Federal University . - ISSN 1385-2728. - ISSN 1875-5348
   Перевод заглавия: N-силилметил-2-(1-нафтил)ацетамиды: синтез, структура и вычислительный скрининг
Кл.слова (ненормированные):
N-organyl-2-(1-naphthyl)-N-(silylmethyl)acetamides -- NMR spectroscopy -- X-ray diffraction analysis -- computational screening -- PASS -- ADME
Аннотация: Synthesis of new hybrid organosilicon compounds based on the amides 1- naphthylacetic acid was described. N-Organyl-2-(1-naphthyl)-N-[(triethoxysilyl)methyl]- acetamides were obtained by the reaction of 1-naphthylacetyl chloride with α-silylamines RNHCH2Si(OEt)3 (R = Me, i-Pr and Ph). Their subsequent interaction with N(CH2CH2OH)3 led to the formation of N-organyl-2-(1-naphthyl)-N-(silatranylmethyl)acetamides. The structure of these hybrid compounds was characterized by 1H, 13C, and 29Si NMR spectroscopy. The structure of N-methyl- and N-isopropyl-2-(1-naphthyl)-N-(silatranylmethy)acetamides was confirmed by X-ray diffraction analysis. Results of computational screening showed that these silatranes are bioavailable and have drug-likeness.

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Держатели документа:
Siberian Division of the Russian Academy of Sciences, A.E. Favorsky Irkutsk Institute of Chemistry, 1 Favorsky Street, Irkutsk 664033, Russia
Laboratory of Crystal Physics, Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radio Electronic, Siberian Federal University, Krasnoyarsk 660041, Russia

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

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

Доп.точки доступа:
Matveeva, A. N.; Zobkalo, I. A.; Meven, M.; Freidman, A. L.; Фрейдман, Александр Леонидович; Semenov, S. V.; Семёнов, Сергей Васильевич; Terentjev, K. Yu.; Терентьев, Константин Юрьевич; Pavlovskiy, N. S.; Павловский, Николай Сергеевич; Kolkov, M. I.; Колков, Максим Игоревич; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Hutanu, V.
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    Vyunishev, A. M.
    Frequency doubling of femtosecond laser pulses in three dimensional nonlinear photonic crystals / A. M. Vyunishev, V. G. Arkhipkin, A. S. Chirkin // Laser Phys. Lett. - 2023. - Vol. 20, Is. 3. - Ст. 035402, DOI 10.1088/1612-202X/acb7f5. - Cited References: 20. - This work was supported by the Russian Science Foundation (Grant # 19-12-00203). The authors thank N Davletshin for graphical illustration of NPC . - ISSN 1612-2011. - ISSN 1612-202X
   Перевод заглавия: Удвоение частоты фемтосекундных лазерных импульсов в трехмерных нелинейных фотонных кристаллах
Кл.слова (ненормированные):
second harmonic generation -- nonlinear photonic crystals -- femtosecond laser pulses -- nonlinear diffraction
Аннотация: Quasi-phase matched nonlinear frequency conversion in three dimensional nonlinear photonic crystals (NPCs) has been considered for implementation of the second harmonic generation of transform-limited and chirped femtosecond laser pulses. Spatial distribution of the second harmonic intensity is shown to be caused by Cherenkov- and Raman–Nath-type nonlinear diffraction. These types of nonlinear diffraction may occur simultaneously resulting in an efficient multi-order nonlinear diffraction in the Bragg regime, which can be realized by a proper choice of the modulation period of NPC structure in longitudinal direction for considered transverse diffraction order. Three dimensional NPCs open up new possibilities for ultrafast nonlinear photonics and parametric interactions in optics.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Photonics and Laser Technology, Siberian Federal University, Krasnoyarsk 660079, Russia
M.V. Lomonosov Moscow State University, Moscow 660079, Russia

Доп.точки доступа:
Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Chirkin, A. S.; Чиркин, А. С.; Вьюнышев, Андрей Михайлович
}
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10.

    Two organic-inorganic manganese(II) halide hybrids containing protonated N,N’-dialkylthioureas with efficient green-emission / N. N. Golovnev, M. A. Gerasimova, I. A. Ostapenko [et al.] // J. Mol. Struct. - 2023. - Vol. 1277. - Ст. 134851, DOI 10.1016/j.molstruc.2022.134851. - Cited References: 42. - The reported study was funded by RFBR according to the research project № 19-52-80003. X-ray data from single crystals and powders were obtained with the analytical equipment of Krasnoyarsk Center of collective use of SB RAS . - ISSN 0022-2860
   Перевод заглавия: Два металорганических галогенида марганца(II), содержащие протонированные N,N'-диалкилтиомочевины с эффективным зеленым излучением
Кл.слова (ненормированные):
Zero-dimensional hybrid manganese(II) halides -- N,N′-alkylthioureas -- Synthesis -- Structure -- Photoluminescence -- Quantum yield -- X-ray diffraction
Аннотация: Luminescent (C5H13N2S)2[MnBr4] (1) and (C7H17N2S)2[MnBr4] (2) (C5H12N2S = N,N′-diethylthiourea, C7H16N2S = N,N′-diisopropylthiourea) were prepared via solvothermal method, and the structures of these compounds have been resolved using X-ray single crystal diffraction. The structures consist of electrostatically bound MnBr42− anions and organic C5H13N2S+ and C7H17N2S+ cations. The intermolecular N−H···Br and N−H···S hydrogen bonds additionally stabilize crystal structures of 1-2. Upon excitation over broadband covering the range 265 to 515 nm, these compounds show green emission peaking at 526 nm for 1 and 522 nm for 2, which is assigned to the 4T1→ 6A1 electronic transition of Mn2+ from isolated within the crystal structures MnBr42− tetrahedra. The photoluminescence quantum yield (PLQY) of powder 1 is 97 ± 7% for excitation at 440 nm and that of powder 2 is 83 ± 7% for excitation at 365 nm. The high PLQY indicates the absence of noticeable concentration quenching at shortest Mn···Mn distance of 8.11 and 8.73 Å between Mn2+ ions within the structures of 1 and 2. The high-performance photoluminescence of 0D (C5H13N2S)2[MnBr4] and (C7H17N2S)2[MnBr4] compounds demonstrated promising applications in photonics.

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Держатели документа:
Siberian Federal University, Krasnoyarsk 660041, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russia

Доп.точки доступа:
Golovnev, Nicolay N.; Gerasimova, Marina A.; Ostapenko, Ivan A.; Zolotov, Andrey O.; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
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11.

Unveiling Talbot effect under Fresnel diffraction at a fork-shaped grating / D. A. Ikonnikov, S. A. Myslivets, N. N. Davletshin [et al.] // Ann. Phys. (Berlin). - 2023. - Vol. 535, Is. 3. - Ст. 2200480, DOI 10.1002/andp.202200480. - Cited References: 31. - The work was supported by the Russian Science Foundation (Grant No. 19-12-00203) . - ISSN 0003-3804. - ISSN 1521-3889
Кл.слова (ненормированные):
fork-shaped gratings -- optical vortices -- Talbot effect -- topological charge
Аннотация: The near-field effect of diffraction image self-reproduction or self-imaging of a periodic grating illuminated by quasi-monochromatic wave is well-known as the Talbot effect. Introducing a dislocation to a periodic structure provides a fork-shaped modulation of the phase/amplitude, which produces discrete diffraction pattern in a far-field consisting of optical vortices. In this paper, Fresnel diffraction at amplitude fork-shaped grating is theoretically and experimentally studied. The coexistence of spatial ordering and local violation of translational symmetry of the structure manifests itself in a strict diffraction pattern consisting of optical vortices in the far-field, which is shown to be accompanied by formation of a spatially ordered intensity distribution in the near-field, reminiscent the Talbot carpets for periodic structures. These results demonstrate the first evidence of Talbot effect occurred under light diffraction at fork-shaped gratings, being promising for deep understanding of near-field singular optics phenomena.

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

Доп.точки доступа:
Ikonnikov, D. A.; Иконников, Денис Андреевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Davletshin, N. N.; Давлетшин, Николай Николаевич; Baron, F. A.; Барон, Филипп Алексеевич; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович
}
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12.

Near-field evolution of optical vortices and their spatial ordering behind a fork-shaped grating / D. A. Ikonnikov, S. A. Myslivets, V. G. Arkhipkin, A. M. Vyunishev // Photonics. - 2023. - Vol. 10, Is. 4. - Ст. 469, DOI 10.3390/photonics10040469. - Cited References: 32. - The work is supported by the Russian Science Foundation (grant No. 19-12-00203) . - ISSN 2304-6732
Кл.слова (ненормированные):
fork-shaped grating -- optical vortex -- optical singularity -- near-field diffraction
Аннотация: Fork-shaped gratings are periodic structures containing a spatial dislocation known to be used for the production of optical vortices in a far field. Spatial overlapping of diffraction orders in a near field results in complex spatial evolution of optical vortices. In this paper, we report the results of near-field diffraction on fork-shaped gratings with different topological charges and analyze the evolution of specific optical vortices during propagation. Optical vortices have been shown to form two-dimensional well-ordered spatial configurations in specific transverse planes. The locus of points of optical singularities has been shown to form two helical lines twisted around the ±1 diffraction order directions. Our results demonstrate that the spatial behaviour of optical vortices is in close connection with the spatial ordering arising from the Talbot effect. The quantity of optical vortices demonstrates complex spatial dynamics, which includes spatial oscillations and decreasing along the propagation direction. These results provide a foundation towards a deeper understanding of near-field singular optics phenomena.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Department of Photonics and Laser Technology, Siberian Federal University, 660079 Krasnoyarsk, Russia

Доп.точки доступа:
Ikonnikov, Denis A.; Иконников, Денис Андреевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович
}
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13.

Crystal structure of bismuth-containing samarium iron–aluminium borates Sm1−xBixFe3−yAly(BO3)4 (x = 0.05–0.07, y = 0–0.28) in the temperature range of 25–500 K / E. S. Smirnova, O. A. Alekseeva, V. V. Artemov [et al.] // Crystals. - 2023. - Vol. 13, Is. 7. - Ст. 1128, DOI 10.3390/cryst13071128. - Cited References: 59. - This work was supported by the Russian Science Foundation (project No 23-22-00286) . - ISSN 2073-4352
Кл.слова (ненормированные):
rare-earth iron–aluminium borates -- solid solutions -- low-temperature X-ray diffraction -- single crystals -- temperature structural dynamics -- negative thermal expansion
Аннотация: Structural features of new mixed bismuth-containing samarium iron–aluminium borate single crystals Sm1−xBixFe3−yAly(BO3)4 (x = 0.05–0.07, y = 0–0.28) were studied using X-ray diffraction analysis based on aluminium content and temperature in the range 25–500 K. The crystals were grown using the solution-in-melt technique with Bi2Mo3O12 in a flux. The composition of the single crystals was analyzed using energy-dispersive X-ray fluorescence and energy-dispersive X-ray elemental analysis. Temperature dependencies of Sm1−xBixFe3−yAly(BO3)4 unit-cell parameters were studied. Negative thermal expansion was identified below 100 K and represented by characteristic surfaces of the thermal expansion tensor. (Sm,Bi)–O, (Sm,Bi)–(Fe,Al), (Fe,Al)–(Fe,Al), and (Fe,Al)–O interatomic distances decreased with the addition of aluminium atoms. An increase in the (Fe,Al)–(Fe,Al) intrachain bond length at low temperatures in the magnetically ordered state weakened this bond, whereas a decrease in the (Fe,Al)–(Fe,Al) interchain distance strengthened super-exchange paths between different chains. It was found that the addition of aluminium atoms influenced interatomic distances in Sm1−xBixFe3−yAly(BO3)4 much more than lowering the temperature from 293 K to 25 K. The effect of aluminium doping on magnetoelectric properties and structural symmetry of rare-earth iron borates is also discussed.

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Держатели документа:
Shubnikov Institute of Crystallography of Federal Scientific Research Centre ‘Crystallography and Photonics’, Russian Academy of Sciences, Moscow 119333, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Smirnova, E. S.; Alekseeva, O. A.; Artemov, V. V.; Sorokin, T. A.; Khmelenin, D. N.; Sidorova, E. V.; Frolov, K. V.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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14.

    Magnetic, optical, and thermic properties of SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) compounds / N. N. Habibullayev, N. G. Naumov, A. N. Lavrov [et al.] // Magnetochemistry. - 2023. - Vol. 9, Is. 8. - Ст. 194, DOI 10.3390/magnetochemistry9080194. - Cited References: 36. - The study was funded by the Russian Science Foundation, project No. 23-23-00488 . - ISSN 2312-7481
   Перевод заглавия: Магнитные, оптические и термические свойства соединений SrLnCuSe3 (Ln = Dy, Ho, Er, Tm)
Кл.слова (ненормированные):
single-crystal X-ray diffraction -- Curie–Weiss dependence -- magnetic susceptibility -- effective magnetic momentum -- bandgap -- DFT calculations -- Raman spectrometry -- thermal analysis -- scanning electron microscope
Аннотация: SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) compounds crystallize in the Pnma and Cmcm orthorhombic space group and belong to the Eu2CuS3 and KCuZrS3 structural type, respectively. According to a single-crystal XRD study, the SrTmCuSe3 unit cell parameters are a = 4.0631 (4), b = 13.4544 (14), c = 10.4430 (10) A, and V = 570.88 (10) A3. All the studied SrLnCuSe3 samples in the temperature range of 1.77–300 K demonstrate paramagnetic behavior without any features pointing to magnetic ordering. The measured Curie constants coincide with the values expected for Ln3+ ions with good accuracy, which confirms the stoichiometric composition of the samples and the non-magnetic state of the copper ions, Cu1+ (S = 0). The conducted optical absorption study showed that the polycrystalline SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) samples are semiconductors with a direct bandgap ranging from 2.14 eV to 2.31 eV. Two indirect bandgaps were revealed and explained by the presence of optical transitions to highly dispersive subbands in the conduction band. The compounds demonstrate two reversible phase transitions α⇆β, β⇆γ and an incongruent melting at 1606 K (Dy), 1584 K (Ho), 1634 K (Er), and 1620 K (Tm) associated with the formation of solid solutions of SrSe, Cu2-XSe, and Ln2Se3 binary compounds.

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Держатели документа:
Institute of Chemistry, University of Tyumen, 625003 Tyumen, Russia
Nikolaev Institute of Inorganic Chemistry SB RAS, 630090 Novosibirsk, Russia
Kirensky Institute of Physics, Federal Research Center, KSC, SB RAS, 660036 Krasnoyarsk, Russia
Department of Photonics and Laser Technology, Siberian Federal University, 660036 Krasnoyarsk, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center, KSC, SB RAS, 660036 Krasnoyarsk, Russia
Laboratory of Theory and Optimization of Chemical and Technological Processes, University of Tyumen, 625003 Tyumen, Russia
Department of Physics, Far Eastern State Transport University, 680021 Khabarovsk, Russia
Department of Physical and Applied Chemistry, Kurgan State University, 640020 Kurgan, Russia
Department of General and Special Chemistry, Industrial University of Tyumen, 625000 Tyumen, Russia
Institute of Solid State Chemistry, UB RAS, 620990 Ekaterinburg, Russia

Доп.точки доступа:
Habibullayev, N. N.; Naumov, N. G.; Lavrov, A.N.; Kuratieva, N. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Palamarchuk, I. V.; Yurev, I. O.; Denisenko, Y. G.; Andreev, O. V.; Zakharova, A. D.
}
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15.

    Thermokinetic study of intermetallic phase formation in an Al/Cu multilayer thin film system / E. T. Moiseenko, V. V. Yumashev, R. R. Altunin [et al.] // Materialia. - 2023. - Vol. 28. - Ст. 101747, DOI 10.1016/j.mtla.2023.101747. - Cited References: 53. - This work was supported by the Russian Science Foundation under grant # 22-13-00313 . - ISSN 2589-1529
   Перевод заглавия: Термокинетическое исследование образования интерметаллических фаз в многослойной тонкопленочной системе Al/Cu
Кл.слова (ненормированные):
Intermetallics -- Thin film -- Solid-state reaction -- Kinetics -- Differential scanning calorimetry -- Electron diffraction
Аннотация: The solid-state reaction process in a multilayer thin film system (Al/Cu)50 has experimentally been studied using the methods of simultaneous thermal analysis (STA) and in situ electron diffraction. A detailed kinetic analysis of the phase formation processes during the solid-state reaction has shown that the observed solid-state transformations can be described by a statistically significant kinetic model where each stage corresponds to the reaction of the n-th order with autocatalysis. The low-temperature stage has been demonstrated to be attributable to the formation of the θ-Al2Cu phase, with the medium-temperature and high-temperature ones corresponding to the α2-AlCu3 and γ1-Al4Cu9 phases, respectively. The kinetic parameters for the formation of the phases θ-Al2Cu, α2-AlCu3 and γ1-Al4Cu9 have been determined. It has been shown that the kinetic model describing the solid-state reaction in the Al–Cu multilayer thin film system is in best agreement with the experimental data in the case of a competition between the formation stages of the α2-AlCu3 and γ1-Al4Cu9 phases.

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Держатели документа:
Siberian Federal University, 660041 79 Svobodny ave., Krasnoyarsk, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Akademgorodok 50/24, 660036 Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Moiseenko, E. T.; Yumashev, V. V.; Altunin, R. R.; Solovyov, L. A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Belousov, O. V.; Zharkov, S. M.; Жарков, Сергей Михайлович
}
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16.

Arkhipkin, V. G.
Diffraction of a Laguerre-Gaussian beam in Raman interaction with a spatially periodic pump field / V. G. Arkhipkin, D. A. Ikonnikov, S. A. Myslivets // Phys. Rev. A. - 2023. - Vol. 107, Is. 2. - Ст. 023519, DOI 10.1103/PhysRevA.107.023519. - Cited References: 35. - This work was supported by the Russian Science Foundation (Grant No. 19-12-00203) . - ISSN 2469-9926. - ISSN 2469-9934
Аннотация: We studied Fresnel diffraction of a Laguerre-Gaussian beam LGp,l with arbitrary azimuthal l and radial p indices on a grating induced during its Raman interaction with a spatially periodic pump field in an atomic medium. The diffraction pattern turned out to be more complex than the classical Talbot effect observed when a plane wave illuminates a two-dimensional grating. The simulation results show that, under certain conditions, at distances corresponding to the classical Talbot planes (integer and fractional), periodic amplitude-phase distributions appear. The diffraction patterns are not a probe-field image in the induced grating plane, but a regular array of vortex annular-shaped microbeams with an inhomogeneous intensity distribution depending on the l and p indices and with a topological charge equal to that of the initial probe beam. The intensity and spatial distribution of diffraction patterns can be controlled by Raman amplification in the induced grating by varying the pump-field intensity or the Raman detuning.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Department of Photonics and Laser Technology, Siberian Federal University, 660041 Krasnoyarsk, Russia

Доп.точки доступа:
Ikonnikov, D. A.; Иконников, Денис Андреевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
}
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17.

Magnetic ordering and chirality in multiferroic Dy1-xHoxMnO3 (x = 0.2) / A. N. Matveeva, I. A. Zobkalo, A. Sazonov [и др.] // Phys. B: Condens. Matter. - 2023. - Vol. 658. - Ст. 414821, DOI 10.1016/j.physb.2023.414821. - Cited References: 41. - The authors are grateful to D.A. Balaev for fruitful discussions and crystal growth management. This work was supported by the Russian Foundation for Basic Research grant # 19-52-12047, and DFG grant # SA3688/1-1, also by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects number 18-42-243024 and 20-42-243008. The neutron data were obtained at the instrument POLI operated jointly by RWTH Aachen University and Jülich Centre for Neutron Science within JARA cooperation . - ISSN 0921-4526. - ISSN 1873-2135
Кл.слова (ненормированные):
Neutron diffraction -- Crystal structure -- Multiferroics -- Magnetic structure -- Manganites
Аннотация: Effect of substitution Dy by Ho on the magneto-electric behavior of the compound Dy0.8Ho0.2MnO3 was investigated by the different methods of polarized and classical neutron diffraction and macroscopic methods. It is shown that substitution by Ho of 20% on the position of Dy do not change overall crystal symmetry of compound. It remains of Pbnm type down to the very low temperatures. Magnetic ordering, its temperature and field evolution was determined by the use of single crystal neutron diffraction and magnetization measurements. Chiral type of magnetic structure on Mn subsystem is confirmed below Tc ≈ 16 K. Using polarized neutron diffraction the 3-component character of rare earth magnetic ordering in Dy0.8Ho0.2MnO3 in contrast to DyMnO3 could be revealed. It was shown that doping by 20% Ho suppresses the spontaneous rare-earth ordering with its own propagation vector and provides the situation when two magnetic subsystems, manganese and rare earth ones have a coherent incommensurate spatial propagation. The influence of the external electric field on the magnetic chirality could be directly evidenced, proving strong magneto-electric coupling in multiferroic phase. The study of the electric polarization under similar temperatures and fields on the same samples provides the direct correlation between the results of the microscopic and macroscopic investigations.

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

Доп.точки доступа:
Matveeva, A. N.; Zobkalo, I. A.; Sazonov, A.; Freidman, A. L.; Фрейдман, Александр Леонидович; Semenov, S. V.; Семёнов, Сергей Васильевич; Kolkov, M. I.; Колков, Максим Игоревич; Terentjev, K. Yu.; Терентьев, Константин Юрьевич; Pavlovskiy, N. S.; Павловский, Николай Сергеевич; Shaykhutdinov, K. A.; Hutanu, V.
}
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18.

Formation of the Cu6Sn5 intermetallics in Cu/Sn thin films / L. E. Bykova, S. M. Zharkov, V. G. Myagkov [et al.] // Phys. Solid State. - 2022. - Vol. 64, Is. 2. - P. 33-37, DOI 10.1134/S1063783422010048. - Cited References: 16. - The study was supported by the Russian Foundation for Basic Research, project no. 19-43-240003. The electron microscopy study was carried out at the Krasnoyarsk Regional Center for Collective Use of the Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences and at the Laboratory of Electron Microscopy of the Center for Collective Use of the Siberian Federal University within the state assignment of the Ministry of Science and Higher Education of the Russian Federation, research theme code FSRZ-2020-0011 . - ISSN 1063-7834
Кл.слова (ненормированные):
thin films -- Cu6Sn5 intermetallic -- transmission electron microscopy -- electron diffraction
Аннотация: The formation of the Cu6Sn5 intermetallic in Sn(55nm)/Cu(30nm) thin-film bilayers has been studied upon heating the film sample from room temperature to 300°C directly in a column of a transmission electron microscope in the electron diffraction mode with recording electron diffraction patterns. The thin films synthesized by the solid-state reaction have been found to be single-phase and consist of the η-Cu6Sn5 hexagonal phase (95‒260°C). It has been suggested basing on the effective interdiffusion coefficient (5 × 10‒16 m2/s) estimated in the course of the reaction that the main mechanism of the formation of the Cu6Sn5 thin films is diffusion along grain boundaries and dislocations.

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Публикация на русском языке Формирование интерметаллида Cu6Sn5 в тонких пленках Cu/Sn [Текст] / Л. Е. Быкова, С. М. Жарков, В. Г. Мягков [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 12. - С. 2205-2209

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

Доп.точки доступа:
Bykova, L. E.; Быкова, Людмила Евгеньевна; Zharkov, S. M.; Жарков, Сергей Михайлович; Myagkov, V. G.; Мягков, Виктор Григорьевич; Balashov, Yu. Yu.; Балашов, Юрий Юрьевич; Patrin, G. S.; Патрин, Геннадий Семёнович
}
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19.

Magnetic properties and structural anomalies observed in multiferroic NdFe3(BO3)4 by 57Fe Mossbauer spectroscopy / K. V. Frolov, I. S. Lyubutin, O. A. Alekseeva [et al.] // J. Alloys Compd. - 2022. - Vol. 909. - Ст. 164747, DOI 10.1016/j.jallcom.2022.164747. - Cited References: 61. - This work was supported by the Russian Ministry of Science and Higher Education within the State assignment FSRC "Crystallography and Photonics" RAS and performed using the equipment of the Shared Research Center "Structural diagnostics of materials" of FSRC "Crystallography and Photonics" RAS . - ISSN 0925-8388
Кл.слова (ненормированные):
Multiferroics -- Rare earth - iron compounds -- X-ray diffraction -- Mossbauer spectroscopy -- Commensurate and incommensurate magnetic structures
Аннотация: The results of studies of the NdFe3(BO3)4 by 57Fe Mossbauer spectroscopy in comparison with the data of single crystal X-ray diffraction measurements are presented. Scanning of the crystal cell parameters in a wide temperature range T = 15–500 K revealed a negative thermal expansion along the c axis and structural anomalies. The temperature dependences of the Mössbauer parameters of hyperfine interaction in the paramagnetic state of NdFe3(BO3)4 correlate well with the behavior of crystal cell parameters obtained by X-ray diffraction data. The temperature of the magnetic phase transition TN = 32.54(4) K is established, below which the iron ions form a 3D magnetic order of the Izing type. The magnetic transition of the iron subsystem from a commensurate to an incommensurate structure at a temperature of about T ≈ 15 K is discussed. The "Mössbauer" Debye temperature ΘM was estimated to be 485(2) K.

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Держатели документа:
Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” RAS, Moscow, 119333, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Frolov, K. V.; Lyubutin, I. S.; Alekseeva, O. A.; Smirnova, E. S.; Dudka, A. P.; Verin, I. A.; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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20.

Magnetic phase diagram of HoFeO3 by neutron diffraction / A. K. Ovsianikov, O. V. Usmanov, I. A. Zobkalo [et al.] // J. Magn. Magn. Mater. - 2022. - Vol. 557. - Ст. 169431, DOI 10.1016/j.jmmm.2022.169431. - Cited References: 44. - This work was supported by the Russian Foundation for Basic Research grant # 19-52-12047, and DFG grant # SA 3688/1-1. Neutron Experiments were performed at the instrument POLI jointly operated by RWTH Aachen University and Forschungszentrum Jülich at MLZ within JARA-FIT collaboration . - ISSN 0304-8853
Кл.слова (ненормированные):
Antisymmetric exchange -- External fields -- Isotropic-exchange -- Magnetic phase -- Magnetic phase diagrams -- Neutron diffraction studies -- Sub-lattices -- Under external magnetic field
Аннотация: Neutron diffraction studies of HoFeO3 single crystals were performed under external magnetic fields. The interplay between the external magnetic fields, Dzyaloshinsky-Moria antisymmetric exchange, isotropic exchange interactions between Fe and Ho sublattices and within the Fe sublattice provides a rich magnetic phase diagram. As the result of the balance of exchange interactions inside the crystal and external magnetic fields, we found 8 different magnetic phases, induced or suppressed dependent on the external field.

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Держатели документа:
Petersburg Nuclear Physics Institute by B.P. Konstantinov of NRC «Kurchatov Institute», Gatchina, 188300, Russian Federation
Institute of Crystallography, RWTH Aachen University, Aachen, 52066, Germany
Julich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum, Lichtenbergstrae 1, Garching, 85747, Germany
Scientific-Practical Materials Research Centre NAS of Belarus, 19 P. Brovki str., Minsk, 220072, Belarus
Kirensky Institute of Physics, Federal Research Center, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660071, Russian Federation
Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, Grenoble Cedex 9, 38042, France
Institute of Ceramic, Chinese Academy of Sciences, Shanghai, 200050, China

Доп.точки доступа:
Ovsianikov, A. K.; Usmanov, O. V.; Zobkalo, I. A.; Hutanu, V.; Barilo, S. N.; Liubachko, N. A.; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Terentjev, K. Yu.; Терентьев, Константин Юрьевич; Semenov, S. V.; Семёнов, Сергей Васильевич; Chatterji, T.; Meven, M.; Brown, P. J.; Roth, G.; Peters, L.; Deng, H.; Wu, A.
}
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