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Optical properties of the HoGa3(BO3)4 crystal: experiment and ab initio calculation / S. N. Krylova, A. S. Aleksandrovsky, E. M. Roginskii [et al.] // Ferroelectrics. - 2020. - Vol. 559, Is. 1. - P. 135-140, DOI 10.1080/00150193.2020.1722015. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (grant No 18-02-00754) . - ISSN 0015-0193
Кл.слова (ненормированные):
HoGa3(BO3)4 -- ab initio calculation -- absorption spectrum -- band structure
Аннотация: Single crystal of HoGa3(BO3)4 has been grown using solution-melt synthesis. The optical band gap determined from the measured absorption spectrum is due to direct allowed transition and equals to 4.14 eV. The optical properties of this crystal are calculated by the plane-wave pseudo-potential method based on density functional theory. The structure of the crystal has been optimized. The electronic structure of HoGa3(BO3)4 is calculated. The experimental and theoretical fundamental absorption spectra are compared. The calculated bandgap is in good agreement with the experimental data.

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Держатели документа:
Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Ioffe Institute, St. Petersburg, Russian Federation
St. Petersburg State University, St. Petersburg, Russian Federation
Moscow Institute of Physics and Technology, Dolgoprudny, Russian Federation

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Roginskii, E. M.; Krylov, A. A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Vtyurin, A. N.; Втюрин, Александр Николаевич
}
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    Glass crystallization making red phosphor for high-power warm white lighting / T. Hu, L. Ning, Y. Gao [et al.] // Light Sci. Appl. - 2021. - Vol. 10, Is. 1. - Ст. 56, DOI 10.1038/s41377-021-00498-6. - Cited References: 50. - The present work was supported by the National Natural Science Foundations of China (Grant Nos. 51972118, 51961145101, 51722202 and 11974022), the Guangzhou Science & Technology Project (202007020005), the Fundamental Research Funds for the Central Universities (D2190980), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137) . - ISSN 2095-5545
   Перевод заглавия: Кристаллизация стекла с синтезом красного люминофора для мощного теплого белого освещения
Кл.слова (ненормированные):
Aluminosilicate glass -- First-principles calculation -- Glass crystallization -- Luminous efficiency -- Preparation method -- Solid state lighting -- Solid-state lighting technology -- Stable luminescence -- Light emission
Аннотация: Rapid development of solid-state lighting technology requires new materials with highly efficient and stable luminescence, and especially relies on blue light pumped red phosphors for improved light quality. Herein, we discovered an unprecedented red-emitting Mg2Al4Si5O18:Eu2+ composite phosphor (λex = 450 nm, λem = 620 nm) via the crystallization of MgO–Al2O3–SiO2 aluminosilicate glass. Combined experimental measurement and first-principles calculations verify that Eu2+ dopants insert at the vacant channel of Mg2Al4Si5O18 crystal with six-fold coordination responsible for the peculiar red emission. Importantly, the resulting phosphor exhibits high internal/external quantum efficiency of 94.5/70.6%, and stable emission against thermal quenching, which reaches industry production. The maximum luminous flux and luminous efficiency of the constructed laser driven red emitting device reaches as high as 274 lm and 54 lm W−1, respectively. The combinations of extraordinary optical properties coupled with economically favorable and innovative preparation method indicate, that the Mg2Al4Si5O18:Eu2+ composite phosphor will provide a significant step towards the development of high-power solid-state lighting.

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Держатели документа:
School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China
Anhui Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu, Anhui, China
School of Applied Physic and Materials, Wuyi University, Jiangmen, Guangdong, China
Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, Guangdong, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, Russian Federation
Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology Beijing, Beijing, China

Доп.точки доступа:
Hu, T.; Ning, L.; Gao, Y.; Qiao, J.; Song, E.; Chen, Z.; Zhou, Y.; Wang, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Ke, X.; Xia, Z.; Zhang, Q.
}
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Non-chemical fluorination of hexagonal boron nitride by high-energy ion irradiation / S. Entani [et al.] // Nanotechnology. - 2020. - Vol. 31, Is. 12. - Ст. 125705, DOI 10.1088/1361-6528/ab5bcc. - Cited References: 53 . - ISSN 0957-4484. - ISSN 1361-6528
Кл.слова (ненормированные):
Hexagonal boron nitride -- heteroatom doping -- high-energy ion irradiation -- near edge X-ray absorption fine structure -- ab initio calculation
Аннотация: Two-dimensional materials such as hexagonal boron nitride (h-BN) and graphene have attracted wide attention in nanoelectronics and spintronics. Since their electronic characteristics are strongly affected by the local atomic structure, the heteroatom doping could allows us to tailor the electronic and physical properties of two-dimensional materials. In this study, a non-chemical method of heteroatom doping into h-BN under high-energy ion irradiation was demonstrated for the LiF/h-BN/Cu heterostructure. Spectroscopic analysis of chemical states on the relevant atoms revealed that 6 ± 2% fluorinated h-BN are obtained by the irradiation of 2.4 MeV Cu2+ ions with the fluence up to 1014 ions/cm2. It was shown that the high-energy ion irradiation leads to a single-sided fluorination of h-BN by the formation of the fluorinated sp 3-hybridized BN.

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Держатели документа:
National Institutes for Quantum and Radiological Science and Technology Takasaki Advanced Radiation Research Institute, Takasaki, 370-1292, JAPAN
National University of Science and Technology MISiS, Moscow, RUSSIAN FEDERATION
Kirensky Institute of Physics, Krasnoyarsk, RUSSIAN FEDERATION
Ritsumeikan University College of Science and Engineering Graduate School of Science and Engineering, Kusatsu, Shiga, JAPAN
Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Sendai, JAPAN
Research Institute for Applied Mechanics, Kyushu University, Kasuga, JAPAN
National Institutes for Quantum and Radiological Science and Technology Takasaki Advanced Radiation Research Institute, Takasaki, JAPAN
Inorganic Nanomaterials lab, Nacional'nyj issledovatel'skij tehnologiceskij universitet MISiS, Moscow, Moscow, RUSSIAN FEDERATION

Доп.точки доступа:
Entani, Shiro; Larionov, K. V.; Ларионов, Константин В.; Popov, Z. I.; Попов, Захар Иванович; Takizawa, Masaru; Mizuguchi, Masaki; Watanabe, Hideo; Li, Songtian; Naramoto, Hiroshi; Sorokin, Pavel B.; Sakai, Seiji
}
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Calculation and Comparison of Electronic, Vibrational, Polarization, and Magnetic Properties of Double Perovskites CaMnTi2O6 and CaFeTi2O6 / N. D. Andryushin, V. I. Zinenko, M. S. Pavlovskii, A. S. Shinkorenko // J. Exp. Theor. Phys. - 2019. - Vol. 129, Is. 6. - P. 1036-1044, DOI 10.1134/S1063776119110013. - Cited References: 18. - This work was supported by the Russian Foundation for Basic Research (project no. 18-02-00130-a) . - ISSN 1063-7761
Кл.слова (ненормированные):
Antiferromagnetism -- Crystal lattices -- Density functional theory -- Electronic properties -- Ferroelectricity -- Ground state -- Iron compounds -- Perovskite -- Spin polarization
Аннотация: Vibrational, polarization, magnetic, and electronic properties of double perovskites CaMnTi2O6 and CaFeTi2O6 with a rare type of “column” ordering of divalent metal cations have been calculated based on the density functional theory. Analysis of the crystal lattice dynamics for paraelectric phase P42/nmc of both compounds has revealed that ferroelectric instability exists only in CaMnTi2O6. It is found that the structure distortion of the paraphrase of CaMnTi2O6 in the eigenvector of the unstable polar mode leads to a structure with the P42/nmc space group. The calculated spontaneous polarization for the ferroelectric phase of CaMnTi2O6 is Ps = 25 μC/cm2. The spin-polarization calculations have shown that the ground state is ferromagnetic in the CaFeTi2O6 crystal and antiferromagnetic in the CaMnTi2O6 crystal. The exchange interaction constants have been calculated using the Heisenberg model and the mean field approximation; the phase transition temperature for each compound has been estimated.

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Публикация на русском языке Расчет и сравнение электронных, колебательных, поляризационных и магнитных свойств двойных перовскитов CaMnTi2O6 и CaFeTi2O6 [Текст] / Н. Д. Андрюшин [и др.] // Журн. эксперим. и теор. физ. - 2019. - Т. 156 Вып. 6. - С. 1137-1146

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

Доп.точки доступа:
Andryushin, N. D.; Андрюшин, Никита Дмитриевич; Zinenko, V. I.; Зиненко, Виктор Иванович; Pavlovskii, M. S.; Павловский, Максим Сергеевич; Shinkorenko, A. S.; Шинкоренко, Алексей Сергеевич
}
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The calculation of the complete sum of residues relative to a polynomial mapping in CN / A. P. Iuzhakov // Doklady Akademii Nauk. - 1984. - Vol. 275, Is. 4. - P. 817-820. - Cited References: 9 . - ISSN 0002-3264

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Держатели документа:
L.V. Kirensky Inst. Phys., Siberian Branch, USSR Acad. Sci., Krasnoyarsk, Russia

Доп.точки доступа:
Iuzhakov, A. P.
}
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Electronic band structures of NdFe3(BO3)4 and NdGa3(BO3)4 crystals: ab initio calculations / S. Krylova, I. Gudim, A. Aleksandrovsky [et al.] // Ferroelectrics. - 2021. - Vol. 575, Is. 1. - P. 11-17, DOI 10.1080/00150193.2021.1888219. - Cited References: 27. - This work was supported by the Russian Foundation for Basic Research Grant No. 20-42-240009 . - ISSN 0015-0193. - ISSN 1563-5112

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
HOFE3(BO3)4
   TEMPERATURE
   SPECTRA
   GROWTH
Кл.слова (ненормированные):
Borates -- ab initio calculation -- electronic bands -- crystal structure
Аннотация: NdFe3(BO3)4 and NdGa3(BO3)4 crystals are of great interest due to their physical properties. For example, NdFe3(BO3)4 crystal demonstrates magnetodielectric and magnetopiezoelectric effects, and NdGa3(BO3)4 crystal possesses luminescent and nonlinear optical properties. In this work, the properties of these materials are calculated by the plane-wave pseudo-potential method based on density functional theory. The structures of the crystals are optimized. The electronic structure of NdFe3(BO3)4 and NdGa3(BO3)4 are calculated.

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Держатели документа:
Kirensky Inst Phys FRC KSC SB RAS, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Gudim, I. A.; Гудим, Ирина Анатольевна; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич; Russian Foundation for Basic Research GrantRussian Foundation for Basic Research (RFBR) [20-42-240009]
}
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Maximova, O. A.
Analytical calculation of dielectric permittivity tensor from magneto-optical ellipsometry measurements / O. Maximova, S. Ovchinnikov, S. Lyaschenko // J. Phys. A. - 2021. - Vol. 54, Is. 29. - Ст. 295201, DOI 10.1088/1751-8121/abfe72. - Cited References: 24. - This study was supported by the Government of the Russian Federation (Agreement No. 075-15-2019-1886) . - ISSN 1751-8113. - ISSN 1751-8121

РУБ Physics, Multidisciplinary + Physics, Mathematical
Рубрики:
FILMS
Кл.слова (ненормированные):
ellipsometry -- dielectric permittivity tensor -- ferromagnetics -- transverse magneto-optical Kerr effect
Аннотация: Magneto-optical ellipsometry combines ellipsometry and magneto-optical Kerr effect measurements which are two powerful techniques. The main difficulty is usually in data processing as a number of parameters should be extracted from measured ellipsometric (ψ, Δ) and magneto-ellipsometric (δψ, δΔ) parameters. Standard procedure of solving magneto-ellipsometry equations involves numerical calculations. In this paper we show that it is possible to find out all elements of dielectric permittivity tensor without numerical calculation methods. It means that the inverse problem of magneto-optical ellipsometry can be solved analytically in the case of expansion of magneto-ellipsometric parameters δψ and δΔ with respect to two small parameters. We present a full set of mathematical expressions that enable us to calculate complex refraction index and complex magneto-optical parameter of a sample from magneto-optical ellipsometry measurements, thereby obtaining diagonal and off-diagonal complex elements of dielectric permittivity tensor. This analytical approach can be used in case of the contribution from magnetism into reflection coefficients being small.

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Держатели документа:
Kirensky Inst Phys SB RAS, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lyashchenko, S. A.; Лященко, Сергей Александрович; Максимова, Ольга Александровна; Government of the Russian Federation [075-15-2019-1886]
}
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Shinkorenko, A. S.
Magnetic, electronic, and optical properties of the tetraborates NiB4O7 and CoB4O7 in three structural modifications / A. S. Shinkorenko, V. I. Zinenko, M. S. Pavlovskii // Phys. Solid State. - 2021. - Vol. 63, Is. 3. - P. 468-476, DOI 10.1134/S1063783421030173. - Cited References: 22. - This study was supported by the Russian Foundation for Basic Research, project no. 18-32-00919 mol_a . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter

Кл.слова (ненормированные):
ab initio calculation -- behavior under pressure -- phase diagram -- dielectrics -- band structure -- magnetic properties
Аннотация: The physical properties of the NiB4O7 and CoB4O7 tetraborate compounds in three structural modifications with the sp. gr. Pbca, Cmcm, and P6522 have been calculated using the density functional theory in the VASP software package. The pressure dependences of the enthalpy of the compounds in the investigated structural modifications have been calculated. The calculated electron densities of states and band structures showed that the compounds under study in all the considered modifications are dielectrics with a band gap of 3–4 eV. The calculation of the magnetic exchange constants in the Heisenberg model have shown qualitative agreement with the experiment.

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Публикация на русском языке Шинкоренко, Алексей Сергеевич. Магнитные, электронные и оптические свойства тетраборатов NiB4O7 и CoB4O7 в трех структурных модификациях [Текст] / А. С. Шинкоренко, В. И. Зиненко, М. С. Павловский // Физ. тверд. тела. - 2021. - Т. 63 Вып. 3. - С. 376-384

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

Доп.точки доступа:
Zinenko, V. I.; Зиненко, Виктор Иванович; Pavlovskii, M. S.; Павловский, Максим Сергеевич; Шинкоренко, Алексей Сергеевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-32-00919 mol_a]
}
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Satsuk, S. A.
Micromagnetic modeling of the polycrystalline structure effect to the hysteresis loop in ferromagnetic nanowire / S. A. Satsuk, S. V. Komogortsev // Journal of Physics: Conference Series. - 2021. - Vol. 1847, Is. 1. - Ст. 012045, DOI 10.1088/1742-6596/1847/1/012045. - Cited References: 32. - This work was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project 18-42-240006
Кл.слова (ненормированные):
Crystallite size -- Ferromagnetic materials -- Ferromagnetism -- Hysteresis -- Hysteresis loops -- Nanowires -- Ferromagnetic nanowire -- Magnetic anisotropy constant -- Magnetic anisotropy energy -- Micromagnetic modeling -- Micromagnetic simulations -- Non-monotonic dependence -- Numerical calculation -- Polycrystalline structure -- Magnetic anisotropy
Аннотация: Extensive micromagnetic simulation results of the hysteresis loops in ferromagnetic nanowire with randomly oriented crystallites ordered in one chain is presented. Three main contributions to the magnetic energy of the wire had been taken into account: exchange, dipole-dipole, and the magnetic anisotropy energy of the crystallite. In cases where one of the three contributions to the energy can be neglected, the numerical calculations are in good agreement with the results of the well-known, analytically studied micromagnetic problems. In the case when all three contributions are comparable, a complex non-monotonic dependence of the coercive force on the crystallite size and the magnetic anisotropy constant is observed. In order to interpret these changes, a new micromagnetic scale is introduced, which takes into account all three contributions to the magnetic energy of the wire, and performs a correct transition to the analytically studied limits, which take into accountthe competition of any two contributions.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Сацук, Светлана Александровна; Dynamic Systems and Computer Science: Theory and Applications(2021 : Oct. 19-22 ; Irkutsk, Russian Federation)
}
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10.

Magnetization dynamics in two-dimensional arrays of square microelements / V. A. Orlov [et al.] // J. Exp. Theor. Phys. - 2018. - Vol. 126, Is. 4. - P. 523-534, DOI 10.1134/S1063776118040118. - Cited References: 48 . - ISSN 1063-7761
Кл.слова (ненормированные):
Ferromagnetic materials -- Ferromagnetism -- Calculation results -- Collective magnetization -- Collective modes -- Experimental investigations -- Magnetic vortices -- Magnetization dynamics -- Topological charges -- Two-dimensional arrays
Аннотация: The collective magnetization motion in an array of magnetostatically interacting ferromagnetic square elements is studied theoretically and experimentally. Dispersion laws are obtained for collective modes for some particular cases of the distribution of the topological charges π T of magnetic vortices in particles. Resonance curves are plotted with allowance for dissipation for various values of π T . An experimental investigation of the ferromagnetic resonance in a two-dimensional array of particles qualitatively supports the calculation results.

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Публикация на русском языке О динамике намагниченности в двумерных массивах квадратных микроэлементов [Текст] / В. А. Орлов [и др.] // Журн. эксперим. и теор. физ. - 2018. - Т. 153 Вып. 4. - С. 635-648

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, Russian Federation
Astaf’ev Krasnoyarsk State Pedagogical University, ul. Ady Lebedevoi 89, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Orlov, V. A.; Орлов, Виталий Александрович; Rudenko, R. Yu.; Руденко, Роман Юрьевич; Kobyakov, A. V.; Кобяков, Александр Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Kim, P. D.; Ким, Пётр Дементьевич; Prokopenko, V. S.; Orlova, I. N.
}
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11.

Val'kov, V. V.
Topological phase of coexisting superconductivity and 120-degree magnetic order on a triangular lattice / V. V. Val’kov, A. O. Zlotnikov // Bull. Russ. Acad. Sci. Phys. - 2018. - Vol. 82, Is. 5. - P. 588-590, DOI 10.3103/S1062873818050325. - Cited References: 12. - This study was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, and the Krasnoyarsk Territorial Foundation for Science and Technology, project nos. 16-02-00073, 17-42-240441, and 16-42-243069. A.O. Zlotnikov acknowledges the support of the RF Presidential Grant Council, project nos. SP-1370.2015.5 and MK-1398.2017.2. . - ISSN 1062-8738
Кл.слова (ненормированные):
Linear combinations -- Nontrivial topology -- Self-consistent calculation -- Spin wave approximation -- Sublattice magnetization -- Superconducting order parameters -- Topological phase -- Triangular lattice
Аннотация: Using the t–J–V model, self-consistent calculations of the superconducting order parameter described by a linear combination of dx2−y2+idxy and p x + ip y chiral invariants are performed in the phase of coexistence with 120-degree magnetic ordering. Sublattice magnetization is determined in the spin-wave approximation for the case of half-filling. A nontrivial topology of the coexistence phase is demonstrated, testifying to the possibility of obtaining edge states and Majorana modes.

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Публикация на русском языке Вальков, Валерий Владимирович. Топологическая фаза сосуществования сверхпроводимости и 120-градусного магнитного порядка на треугольной решетке [Текст] / В. В. Вальков, A. O. Злотников // Изв. РАН. Сер. физич. - 2018. - Т. 82 № 5. - С. 660-663

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

Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Вальков, Валерий Владимирович
}
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12.

    High mechanical strength in Zn4B6O13 with an unique sodalite-cage structure / Y. Yang [et al.] // RSC Adv. - 2017. - Vol. 7, Is. 4. - P. 2038-2043, DOI 10.1039/c6ra25752f. - Cited References: 44. - The authors acknowledge Dr Siyang Luo for useful discussion. This work is supported by the National Scientific Foundations of China (Grant 11474292), the Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC), and China “863” project (No. 2015AA034203). . - ISSN 2046-2069
   Перевод заглавия: Высокая механическая прочность в Zn4B6O13 с уникальной содалитоподобной структурой
Кл.слова (ненормированные):
Calculations -- Mechanical properties -- Shear stress -- Thermal expansion -- Ultraviolet spectroscopy -- X ray diffraction -- Complex environments -- First-principles calculation -- High mechanical strength -- High-pressure x-ray diffractions -- Mechanical resistance -- Ultraviolet spectral regions -- Wide temperature ranges -- Zero thermal expansion -- Zinc
Аннотация: Recently, a borate crystal Zn4B6O13 (ZBO) has been focused on since it exhibits novel isotropic near-zero thermal expansion behavior in a wide temperature range. In this work, the mechanical properties in ZBO are studied by high-pressure X-ray diffraction and first-principles calculations. It is found that ZBO possesses the highest mechanical hardness in all known borates whose mechanical properties have been measured. The very high mechanical strength in ZBO mainly originates from the resistance of strong Zn-O bonds to the rotation among BO4 tetrahedra in the unique sodalite-cage structure. Moreover, ZBO shows relatively high mechanical resistance to the axial and shear stress and exhibits high optical transparence in the ultraviolet spectral region under high pressure. Benefitting from these good properties, ZBO may find potential applications in high-precision optical facilities used at extreme conditions under complex environments. © The Royal Society of Chemistry.

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Держатели документа:
Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SBRAS, Krasnoyarsk, Russian Federation
Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China
University of Chinese Academy of Sciences, Beijing, China
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation

Доп.точки доступа:
Yang, Y.; Jiang, X.; Gong, P.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Li, X.; Li, Y.; Wu, X.; Wu, Y.; Lin, Z.
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13.

Si/Fe flux ratio influence on growth and physical properties of polycrystalline β-FeSi2 thin films on Si(100) surface / I. A. Tarasov [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440. - P. 144-152, DOI 10.1016/j.jmmm.2016.12.084. - Cited References:39. - This work was supported by the Russian Science Foundation, project no. 16-13-00060 . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SEMICONDUCTING FESI2 FILMS
SPECTROSCOPIC ELLIPSOMETRY
EPITAXIAL-FILMS
Кл.слова (ненормированные):
β-FeSi2 iron disilicide -- Optical properties -- Reflection high-energy -- electron diffraction -- Raman spectroscopy -- ab initio calculation
Аннотация: This work investigates the Si/Fe flux ratio (2 and 0.34) influence on the growth of β-FeSi2 polycrystalline thin films on Si(100) substrate at 630 °C. Lattice deformations for the films obtained are confirmed by X-ray diffraction analysis (XRD). The volume unit cell deviation from that of β-FeSi2 single crystal are 1.99% and 1.1% for Si/Fe =2 and Si/Fe =0.34, respectively. Absorption measurements show that the indirect transition (~ 0.704 eV) of the Si/Fe =0.34 sample changes to the direct transition with a bandgap value of ~0.816 eV for the sample prepared at Si/Fe =2. The absorption spectrum of the Si/Fe =0.34 sample exhibits an additional peak located below the bandgap energy value with the absorption maximum of ~0.36 eV. Surface magneto-optic Kerr effect (SMOKE) measurements detect the ferromagnetic behavior of the β-FeSi2 polycrystalline films grown at Si/Fe =0.34 at T=10 K, but no ferromagnetism was observed in the samples grown at Si/Fe =2. Theoretical calculations refute that the cell deformation can cause the emergence of magnetization and argue that the origin of the ferromagnetism, as well as the lower absorption peak, is β-FeSi2 stoichiometry deviations. Raman spectroscopy measurements evidence that the film obtained at Si/Fe flux ratio equal to 0.34 has the better crystallinity than the Si/Fe =2 sample.

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Доп.точки доступа:
Tarasov, I. A.; Тарасов, Иван Анатольевич; Visotin, M. A.; Высотин Максим Александрович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Kosyrev, N. N.; Косырев, Николай Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Krylov, A. S.; Крылов, Александр Сергеевич; Fedorov, A. S.; Федоров, Александр Семенович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science Foundation [16-13-00060]; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
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14.

Belyaev, B. A.
Electrodynamic calculation of effective electromagnetic parameters of a dielectric medium with metallic nanoparticles of a given size / B. A. Belyaev, V. V. Tyurnev // J. Exp. Theor. Phys. - 2018. - Vol. 127, Is. 4. - P. 608-619, DOI 10.1134/S1063776118100114. - Cited References: 31. - This work was supported by the Ministry of Education and Science of the Russian Federation (contract no. 14.575.21.0142; unique identifier of the project is RFMEFI57517X0142). . - ISSN 1063-7761
Кл.слова (ненормированные):
Electromagnetic fields -- Magnetic susceptibility -- Metals -- Nanoparticles -- Natural frequencies -- Permittivity
Аннотация: The frequency dependence of the effective complex permittivity and effective complex permeability of a heterostructure based on a dielectric medium containing metallic nanoparticles of spherical shape is calculated by an original method. In contrast to the Bruggeman [21] and the Maxwell Garnett [17] approaches, which use the quasi-static approximation in calculations, a nonuniform distribution of electromagnetic fields inside metallic particles is calculated, which allows the analysis of the electromagnetic parameters of the heterostructure not only as a function of frequency but also as a function of the nanoparticle size. It is shown that the plasmon resonant frequency decreases with increasing both the size and the concentration of particles in the heterostructure. It is also shown that a dielectric medium containing nonmagnetic metallic nanoparticles exhibits diamagnetic properties. In this case, the position of the maximum on the frequency dependence of the imaginary part of the magnetic susceptibility coincides with the relaxation frequency of charge carriers. The calculated spectra of the real and imaginary components of the permittivity of the heterostructure with a size of metallic particles less than 10 nm are in good agreement with Bruggeman calculations; however, the agreement with Maxwell Garnett calculations is observed only at nanoparticle concentrations lower than 10–6.

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Публикация на русском языке Беляев, Борис Афанасьевич. Электродинамический расчет эффективных электромагнитных параметров диэлектрической среды с металлическими наночастицами заданных размеров [Текст] / Б. А. Беляев, В. В. Тюрнев // Журн. эксперим. и теор. физ. - 2018. - Т. 154 Вып. 4. - С. 716-729

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch,Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Tyurnev, V. V.; Тюрнев, Владимир Вениаминович; Беляев, Борис Афанасьевич
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15.

    Two-Magnon Relaxation Processes in Nanocrystalline Thin Magnetic Films / A. V. Izotov [et al.] // Russ. Phys. J. - 2019. - Vol. 61, Is. 12. - P. 2313-2320, DOI 10.1007/s11182-019-01673-4. - Cited References: 25. - This research was done with support of the Russian Ministry of Education and Science, task No. 3.1031.2017/PCh. . - ISSN 1064-8887. - ISSN 1573-9228
Рубрики:
FERROMAGNETIC-RESONANCE LINEWIDTH
   MICROMAGNETIC CALCULATION
   SCATTERING
Кл.слова (ненормированные):
micromagnetic simulation -- nanocrystallites -- random magnetic anisotropy -- ferromagnetic resonance -- microwave frequencies -- two-magnon relaxation process
Аннотация: Numerical analysis of the micromagnetic model was used to reveal the ‘resonance’ feature of relaxation processes in nanocrystalline thin magnetic films. This feature manifests itself in the form of sharp broadening of the ferromagnetic resonance (FMR) line at a certain frequency f1 depending on magnetic characteristics of the film, and is observed only in films the thickness of which exceeds some threshold value dmin. Sharp broadening of the FMR line is accompanied by significant shift of the resonance field, whereas the shift value changes the sign at frequency ~ f1. It was shown analytically that the nature of observed effects is associated with the two-magnon process of spin waves scattering on quasi-periodic magnetic microstructure – magnetization ‘ripple’. Obtained expressions for the threshold value of film thickness dmin and frequency of maximum broadening of FMR line f1 agree well with the results of numerical computation of micromagnetic model.

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Публикация на русском языке Особенности двухмагнонных процессов релаксации в нанокристаллических тонких магнитных пленках [Текст] / А. В. Изотов [и др.] // Изв. вузов. Физика. - 2018. - Т. 61 № 12. - С. 153-159

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

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Solovev, P. N.; Соловьев, Платон Николаевич; Boev, N. M.; Боев, Никита Михайлович; Russian Ministry of Education and Science [3.1031.2017/PCh]
}
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16.

Krylova, S. N.
Structural properties and lattice dynamics of HoFe3(BO3)4, HoGa3(BO3)4crystals: ab initio calculation / S. N. Krylova, A. S. Krylov, E. M. Roginskii // Joint Conference of the IEEE ISAF, EMF, ICE, IWPM and PFM : Abstract book. - 2019. - P. 691. - Cited References: 4. - This work is financially supported by the Russian Foundation for Basic Research № 18-02-00754

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS, 660036, Krasnoyarsk, Russia
Ioffe Institute
St. Petersburg State University

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Roginskii, E. M.; Крылова, Светлана Николаевна; IEEE International Symposium on Applications of Ferroelectrics(2019 ; July ; 14-19 ; Lausanne, Switzerland); International Conference on ElectroCeramics(2019 ; July ; 14-19 ; Lausanne, Switzerland); European Meeting on Ferroelectricity(14 ; 2019 ; 14-19 July ; Lausanne, Switzerland); International Workshop on PiezoMEMS(2019 ; July ; 14-19 ; Lausanne, Switzerland)Piezoresponse Force Microscopy Workshop(2019 ; July ; 14-19 ; Lausanne, Switzerland)
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17.

    Numerical calculation of high frequency magnetic susceptibility in thin nanocrystalline magnetic films / A. V. Izotov [et al.] // Physica B. - 2018. - Vol. 556. - P. 42-47, DOI 10.1016/j.physb.2018.12.006. - Cited References: 32. - This work was supported by the Ministry of Education and Science of the Russian Federation, №RFMEFI60417X0179. . - ISSN 0921-4526. - ISSN 1873-2135
   Перевод заглавия: Численный расчет высокочастотной магнитной восприимчивости тонких нанокристаллических магнитных пленок
Рубрики:
Physics, Condensed Matter
Кл.слова (ненормированные):
micromagnetic simulation -- magnetization dynamics -- magnetic susceptibility -- ferromagnetic resonance -- nanocrystalline film -- soft magnetic film
Аннотация: Two numerical micromagnetic methods most suitable for calculation of the high frequency magnetic susceptibility of nanocrystalline thin films were considered in detail. The methods are based on the Landau–Lifshitz equation, linearized around the equilibrium state leading to an eigenvalue problem or solved using an undetermined coefficients technique. An analysis and estimation of an efficiency of the methods were carried out. Several conclusions about their advantages and shortcomings, as well as specifics of their practical application were drawn.

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

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Solovev, P. N.; Соловьев, Платон Николаевич; Boev, N. M.; Боев, Никита Михайлович
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18.

    Study of Peculiarities of the Microwave Absorption Spectrum of Nanocrystalline Thin Magnetic Films / B. A. Belyaev [et al.] // Russ. Phys. J. - 2019. - Vol. 61, Is. 10. - P. 1798-1805, DOI 10.1007/s11182-019-01603-4. - Cited References: 22. - This work was supported by the Ministry of Education and Science of the Russian Federation, project No. RFMEFI60417X0179. . - ISSN 1064-8887. - ISSN 1573-9228
Рубрики:
MICROMAGNETIC CALCULATION
   SIMULATIONS
   PARTICLES
   MODES
Кл.слова (ненормированные):
micromagnetic modeling -- nanocrystallites -- random magnetic anisotropy -- ferromagnetic resonance -- microwave
Аннотация: Based on the micromagnetic model which takes into account the random distribution of the uniaxial magnetic anisotropy directions in crystallites of a nanocrystalline film, an effective method has been implemented for calculation of the magnetization dynamics in microwave fields. For a certain range of crystallite sizes, when the energy of the random magnetic anisotropy is comparable to the exchange energy, a significant change of the ferromagnetic resonance field, broadening of the resonance line, and the appearance of an asymmetry in the shape of the resonance curve were found. With an increase of the crystallite sizes, the resonance field first grows, then, it quickly decreases to its minimum, and then, it grows again to reach saturation. In this case, the steepness of the left slope of the broadening resonance curve first decreases faster than that of the right slope, leading to the symmetry breaking of the resonance curve shape, then, the curve becomes symmetrical again, and then, the steepness of the left slope becomes greater than that of the right slope.

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Публикация на русском языке Исследование особенностей спектра СВЧ-поглощения нанокристаллических тонких магнитных пленок [Текст] / Б. А. Беляев [и др.] // Изв. вузов. Физика. - 2018. - Т. 61 № 10. - С. 50-56

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

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Соловьев, Платон Николаевич; Ministry of Education and Science of the Russian Federation [RFMEFI60417X0179]
}
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19.

Raman spectroscopy of SrLnCuS3 (Ln = La, Nd, Tm): experiment and ab initio calculation / S. N. Krylova, V. А. Chernyshev, A. V. Ruseikina [et al.] // XVIII International Feofilov symposium on spectroscopy of crystals doped with rare earth and transition metal ions (IFS-2022) : book of abstracts : Aug. 22-27, 2022, Moscow, Russia. - 2022. - P. 71-72. - Библиогр.: 8. - The work of Krylova S. was financially supported by the Russian Foundation for Basic Research and DFG project number No 21-52-12018. The research of Ruseikina A. was supported by the Tyumen region within the framework of the grant agreement in the form of a grant to non-profit organizations no. 89-don dated 07.12.2020. Chernyshev V. thanks the Ministry of Science and Higher Education of the Russian Federation (project no. FEUZ-2020-0054) for financial support. . - ISBN 978-5-89513-513-6
Аннотация: The Raman spectra of SrLaCuS3, SrNdCuS3, SrTmCuS3 compounds have been investigated. Ab initio calculations of the crystal structure and phonon spectrum of the compounds have been carried out. The types and wave numbers of the fundamental modes have been determined. The experimental Raman spectra have been interpreted.

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, 660036, Russia
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russia
Institute of Chemistry, University of Tyumen, Tyumen, 625003, Russia

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Chernyshev, V. А.; Ruseikina, A. V.; Grigoriev, M. V.; Aleksandrovskiy, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; International Feofilov symposium on spectroscopy of crystals doped with rare earth and transition metal ions(18 ; 2022 ; Aug. ; Moscow); Физический институт им. П.Н. Лебедева РАН; Институт спектроскопии РАН
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20.

Magneto-optical study of Friedericksz threshold in polymer dispersed nematic liquid crystals / O. O. Prishchepa [et al.] // Mol. Cryst. Liquid Cryst. - 2008. - Vol. 488, Is. 1. - P. 309-316, DOI 10.1080/15421400802241167. - Cited Reference Count: 11 . - ISSN 1542-1406
Рубрики:

Кл.слова (ненормированные):
Friedericksz threshold -- nematic -- magneto-optics -- polymer dispersed liquid crystals -- surface anchoring -- Friedericksz threshold -- Magneto-optics -- Nematic -- Polymer dispersed liquid crystals -- Surface anchoring -- Computer systems -- Crystallography -- Drop formation -- Drops -- Fluid mechanics -- Light sources -- Liquid crystals -- Magnetos -- Optical engineering -- Powders -- Approximate formulas -- Calculation data -- Computer modelling -- Friedericksz threshold -- Magneto-optical -- Magneto-optics -- Measured values -- Nematic -- Nematic droplets -- Poly vinyl butyral -- Polymer dispersed liquid crystals -- Reorientation processes -- Surface anchoring -- Threshold fields -- Nematic liquid crystals
Аннотация: A computer model of reorientation processes in the bipolar nematic droplets of ellipsoidal form with strong tangential anchoring has been developed. The approximate formula to estimate the Friedericksz threshold has been obtained when the operating field (electric or magnetic) is orthogonal to the bipolar axis. The dependence of the threshold field on the droplet form has been considered. The reorientation of the bipolar droplets of 5CB nematic liquid crystal dispersed in polyvinylbutyral has been studied by the magneto-optical method. The calculation data are in good agreement with measured values of the threshold field.

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Держатели документа:
Siberian Fed Univ, SB RAS, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Prishchepa, O. O.; Parshin, A. M.; Паршин, Александр Михайлович; Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; International Topical Meeting on Optics of Liquid Crystals(12th ; OCT 01-05, 2007 ; Puebla, MEXICO)
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