Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

в найденном

Найдено в других БД:

Каталог книг и брошюр библиотеки ИФ СО РАН (1)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=Sodium<.>)

Общее количество найденных документов : 30
Показаны документы с 1 по 20

    Gorelik, V. S.
    Raman light scattering in sodium nitrite crystals / V. S. Gorelik, A. Y. Pyatyshev, A. S. Krylov // Bull. Lebedev Phys. Inst. - 2016. - Vol. 43, Is. 5. - P. 167-173, DOI 10.3103/S1068335616050043. - Cited References:37. - This study was supported by the Russian Foundation for Basic Research, projects nos. 12-02-00491, 13-02-00449,13-02-90420, 14-02-00190. . - ISSN 1068-3356. - ISSN 1934-838X
Рубрики:
NANO2
   PHASE
   SPECTROSCOPY
   PARAPHOTONS
   DEPENDENCE
   SPECTRUM
   SEARCH
Кл.слова (ненормированные):
sodium nitrite -- Raman scattering -- spectrum -- polar mode -- polariton -- ferroelectric -- dispersion curves
Аннотация: Raman light scattering spectra of a ferroelectric sodium nitrite crystal is studied in the lattice mode region as the temperature is lowered from room temperature to 123 K. The existence of a Raman satellite corresponding to the soft lattice mode, i.e., transverse polar vibration responsible for the ferroelectric phase transition, is established for the first time. It is found that the intensity of the Raman scattering by the pseudo-scalar low-frequency A (2) mode exceeds the intensity of other lattice variations by an order of magnitude.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ

Публикация на русском языке Горелик, Владимир Семенович. Комбинационное рассеяние света в кристаллах нитрита натрия [Текст] / В. С. Горелик, А. Ю. Пятышев, А. С. Крылов // Кратк. сообщ. по физ. : Физический институт им. П. Н. Лебедева РАН, 2016. - Т. 43 № 5. - С. 26-36

Держатели документа:
Russian Acad Sci, PN Lebedev Phys Inst, Leninskii Pr 53, Moscow 119991, Russia.

Доп.точки доступа:
Pyatyshev, A. Yu.; Krylov, A. S.; Крылов, Александр Сергеевич; Russian Foundation for Basic Research [12-02-00491, 13-02-00449, 13-02-90420, 14-02-00190]
}
Найти похожие

Gorelik, V. S.
Raman scattering in a ferroelectric sodium nitrite crystal / V. S. Gorelik, A. Y. Pyatyshev, A. S. Krylov // Bull. Russ. Acad. Sci. Phys. - 2016. - Vol. 80, Is. 9. - P. 1127-1130, DOI 10.3103/S1062873816090136. - Cited References: 25 . - ISSN 1062-8738
Кл.слова (ненормированные):
Ferroelectric devices -- Ferroelectricity -- Raman scattering -- Sodium -- Ferroelectric phase transition -- Overdamped -- Sodium nitrite -- Soft modes -- Wide spectral range -- Ferroelectric materials
Аннотация: Raman spectra of the ferroelectric sodium nitrite are recorded over a wide spectral range at different temperatures, including the ferroelectric phase transition interval. The room-temperature Raman spectrum reveals the overdamped А1(z) soft mode which is attributed to the ferroelectric phase transition. © 2016, Allerton Press, Inc.

Смотреть статью,
Scopus,
Читать в сети ИФ

Публикация на русском языке Горелик, Владимир Семенович. Комбинационное рассеяние света в сегнетоэлектрическом кристалле нитрита натрия [Текст] / В. С. Горелик, А. Ю. Пятышев, А. С. Крылов // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 9. - С. 1234-1237

Держатели документа:
Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russian Federation
Bauman Moscow State Technical University, Moscow, Russian Federation
AO NPP Istok, Fryazino, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Pyatyshev, A. Y.; Krylov, A. S.; Крылов, Александр Сергеевич
}
Найти похожие

Thermophysical study of structural phase transitions in Na0.95Li0.05NbO3 solid solution / M. V. Gorev [et al.] // Bull. Russ. Acad. Sci. Phys. - 2016. - Vol. 80, Is. 9. - P. 1046-1050, DOI 10.3103/S1062873816090148. - Cited References: 18. - This work was supported by Southern Federal University, project no. 213.01-2014/012-VG. . - ISSN 1062-8738
Кл.слова (ненормированные):
Niobium oxide -- Sodium -- Specific heat -- Temperature distribution -- Thermal expansion -- Ceramic samples -- Effect of heat treatments -- Possible mechanisms -- Sodium lithium niobate -- Structural distortions -- Structural phase transition -- Temperature dependence -- Temperature range -- Lithium
Аннотация: Temperature dependences of specific heat Cp(T) and coefficient of thermal expansion α(T) for Na0.95Li0.05NbO3 sodium-lithium niobate ceramic samples are investigated in the temperature range of 100–800 K. The Cp(T) and α(T) anomalies at T3 = 310 ± 3 K, T2 = 630 ± 8 K, and T1 = 710 ± 10 K are observed, which correspond to the sequence of phase transitions N ↔ Q ↔ S(R) ↔ T2(S). The effect of heat treatment of the samples on the sequence of structural distortions was established. It is demonstrated that annealing of the samples at 603 K leads to splitting of the anomaly corresponding to the phase transition Q → R/S in two anomalies. After sample heating to 800 K, the only anomaly is observed in both the Cp(T) and α(T) dependence. Possible mechanisms of the observed phenomena are discussed.

Смотреть статью,
Scopus,
Читать в сети ИФ

Публикация на русском языке Теплофизические исследования структурных фазовых переходов в твердом растворе Na0.95Li0.05NbO3 [Текст] / М. В. Горев [и др.] // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 9. - С. 1145-1149

Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Southern Federal University, Rostov-on-Don, Russian Federation

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Raevskaya, S. I.; Flerov, I. N.; Флёров, Игорь Николаевич; Malitskaya, M. A.; Raevskii, I. P.
}
Найти похожие

    Hydrates [Na2(H2O)x](2-thiobarbiturate)2 (x = 3, 4, 5): crystal structure, spectroscopic and thermal properties / N. N. Golovnev [et al.] // J. Coord. Chem. - 2016. - Vol. 69, Is. 21. - P. 3219-3230, DOI 10.1080/00958972.2016.1228914. - Cited References:33. - This work was supported by the the Ministry of Education and Science of the Russian Federation for research engineering of the Siberian Federal University [grant number 3049]. . - ISSN 0095-8972. - ISSN 1029-0389
   Перевод заглавия: Гидраты [Na2(H2O)x](2-thiobarbiturate)2 (x = 3, 4, 5): кристаллическая структура, спектроскопические и термические свойства

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
2-THIOBARBITURIC ACID
   COMPLEXES
   1,3-DIETHYL-2-THIOBARBITURATE
   TRANSFORMATION
   CESIUM
   Na
   Li
Кл.слова (ненормированные):
2-Thiobarbituric acid -- Sodium -- coordination compound -- X-ray diffraction -- infrared spectroscopy -- thermal analysis
Аннотация: The hydrates [Na2(H2O)3(Htba)2] (1) and [Na2(H2O)4(Htba)2] (2), where H2tba is 2-thiobarbituric acid, were obtained under different thermal conditions from aqueous solutions and were structurally characterized. The molecular and supramolecular structures were compared to the known structure of [Na2(H2O)5(Htba)2] (3). In polymeric 1–3, the Htba− ions are linked to Na+ through O and S forming octahedra. The decrease of the number of coordination water molecules led to an increase of the total number of bridge ligands (μ2-H2O, Htba−) and a change of the Htba− coordination. These factors induced higher distortion of the octahedra. It was assumed that hydrates, with a different number of coordinated water molecules, are more probable when the central metal has weaker bonds with O water molecules and with other ligands. The net topologies of 1–3 were compared. Thermal decomposition and IR spectra were analyzed for 1 and 2.

Смотреть статью,
WOS,
Читать в сети ИФ
Держатели документа:
Siberian Fed Univ, Dept Chem, Krasnoyarsk, Russia.
Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk, Russia.
Irkutsk Favorsky Inst Chem, Lab Phys Chem, Irkutsk, Russia.
Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk, Russia.
Tomsk State Univ, Funct Elect Lab, Tomsk, Russia.
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk, Russia.

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sterkhova, Irina V.; Atuchin, V. V.; Sidorenko, Maxim Y.; Ministry of Education and Science of the Russian Federation [3049]
}
Найти похожие

Fedotov, A. P.
Deuteron dynamics in crystal of sodium trideuterium selenite / A. P. Fedotov, V. F. Shabanov // Phys. Status Solidi B. - 1983. - Vol. 118, Is. 1. - P. 345-351, DOI 10.1002/pssb.2221180140. - Cited References: 16 . - ISSN 0370-1972

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Shabanov, V. F.; Шабанов, Василий Филиппович
}
Найти похожие

Electron-Phonon Interaction and Phonon Renormalization in the Lamellar Cobaltate NaxCoO2 / A. . Donkov [et al.] // J. Supercond. Nov. Magn. - 2009. - Vol. 22: International Conference on Quantum Phenomena in Complex Matters (JUL 26-AUG 01, 2008, Erice, ITALY), Is. 1. - P. 37-40, DOI 10.1007/s10948-008-0372-6. - Cited References: 16 . - ISSN 1557-1939

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
SUPERCONDUCTIVITY
Кл.слова (ненормированные):
Electron-phonon interaction -- Superconductivity -- Sodium cobaltate -- Electron-phonon interaction -- Sodium cobaltate -- Superconductivity -- Brillouin zones -- Cobaltate -- Conducting electrons -- Conduction electrons -- Doping dependences -- Feedback effects -- Matrix elements -- Phonon frequencies -- Phonon modes -- Raman experiments -- Renormalization -- Sodium cobaltate -- Sodium cobaltates -- Atoms -- Cobalt compounds -- Critical current density (superconductivity) -- Electric conductivity -- Electron-phonon interactions -- Electrons -- Flow interactions -- Penetration depth (superconductivity) -- Sodium -- Superconductivity -- Phonons
Аннотация: We study theoretically the electron-phonon interaction in NaxCoO2. For the A(1g) and E-1g phonon modes found in Raman experiments, we calculate the matrix elements of the electron-phonon interaction. Analyzing the feedback effect of the conduction electrons on the phonon frequency., we investigate the doping dependence of these two phonon modes. Due to the momentum dependence of the electron-phonon interaction, we find the strongest renormalization of the E-1g mode around the Brillouin zone boundary which should be observed in the neutron scattering. At the same time, the A(1g) mode shows the strongest coupling to the conducting electrons around the G point and reveals its doping dependence in the Raman experiments. Our results shed light on the possible importance of the electron-phonon interaction in the lamellar sodium cobaltates.

WOS,
Scopus,
Читать в сети ИФ
Держатели документа:
[Donkov, A.
Eremin, I.
Knolle, J.
Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Eremin, I.] TU Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, Dresden 01187, Germany
Institute fur Mathematische und Theoretische Physik, TU Braunschweig, Braunschweig 38106, Germany
Siberian Branch, Russian Academy of Sciences, L.V. Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Donkov, A.; Eremin, I.; Knolle, J.; Korshunov, M. M.; Коршунов, Максим Михайлович
}
Найти похожие

Inversionless gain in a three-level system driven by a strong field and collisions / A. K. Popov [et al.] // Chin. Phys. - 2000. - Vol. 9, Is. 2. - P. 124-130. - Cited References: 45 . - ISSN 1009-1963

РУБ Physics, Multidisciplinary
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
   POPULATION-INVERSION
   LIGHT AMPLIFICATION
   QUANTUM COHERENCE
   REFRACTIVE-INDEX
   LASER
   INTERFERENCE
   TRANSITIONS
   SODIUM
   ATOMS
Аннотация: Inversionless gain in a degenerate three-level system driven by a strong external field and by collisions with a buffer gas is investigated. The mechanism of population distribution in upper laser level, contributed by the collision transfer, as well as by relaxation, induced by pressure of a buffer gas, is discussed in detail. Explicit formulae for analysis of optimal conditions are derived. The idea developed here for the incoherent pump could be generalized to other systems.

WOS,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, Inst Phys, Krasnoyarsk, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660036, Russia
Jilin Univ, Dept Phys, Changchun 130023, Peoples R China
Univ Hannover, Inst Quantenopt, D-30167 Hannover, Germany
ИФ СО РАН

Доп.точки доступа:
Popov, A. K.; Myslivets, S. A.; Мысливец, Сергей Александрович; Gao, J. Y.; Zhang, H. Z.; Wellegehausen, B.
}
Найти похожие

Effect of molecular weight of sodium polyacrylates on the size and morphology of nickel nanoparticles synthesized by the modified polyol method and their magnetic properties / O. A. Logutenko [et al.] // Eur. Polym. J. - 2018. - Vol. 99. - P. 102-110, DOI 10.1016/j.eurpolymj.2017.12.017. - Cited References: 26. - This work was supported by the Russian Science Foundation, research project No. 15-13-00113. . - ISSN 0014-3057
Кл.слова (ненормированные):
Nickel nanoparticles -- Sodium polyacrylate -- Polyol -- Reduction -- Magnetic properties
Аннотация: Nickel nanoparticles were synthesized by the reduction of nickel chloride with hydrazine hydrate in a polyol medium in the presence of sodium polyacrylates (Na-PA) having molecular weights (Mw) of 1200, 5100 and 8000. The size and morphology of the resulting nickel nanoparticles were characterized by X-ray diffraction, scanning and transmission electron microscopy. Polymers having lower Mw values were found to be more efficient in reducing the nickel particle size. A decrease in the polymer concentrations yielded the smaller particles. Magnetic measurements showed that the as-prepared powders are ferromagnetic and their saturation magnetization and coercivity are size-dependent. Compared with bulk nickel, the nanoparticles exhibit an enhanced coercivity which is due to their small size and a decreased saturation magnetization resulted from the surface oxidation of the powder. The synthesis procedure offers a simple approach to preparing nickel nanopowders on a large scale which could be used as magnetic recording materials, including high-density memory storage devices.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Kutateladze, 18, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Academgorodok, 50/12, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Logutenko, O. A.; Titkov, A. I.; Vorob'yov, A. M.; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Yukhin, Y. M.; Lyakhov, N. Z.
}
Найти похожие

Dynamical immiscibility of aqueous carbonate fluid in the shortite-water system at high-pressure-temperature conditions / S. V. Goryainov, S. N. Krylova, U. O. Borodina, A. S. Krylov // J. Phys. Chem. C. - 2021. - Vol. 125, Is. 33. - P. 18501-18509, DOI 10.1021/acs.jpcc.1c05077. - Cited References: 47. - The reported study was funded by the RFBR and DFG, project number 21-52-12018. Work is done on the state assignment of the Sobolev Institute of Geology and Mineralogy, Kirensky Institute of Physics SB RAS, Equipment of Federal Research Center of Krasnoyarsk Science Center SB RAS, and supported by the Ministry of Science and Higher Education. Authors thank A.N. Vtyurin, A.G. Sokol, A.Yu. Likhacheva, and A.F. Shatskiy for fruitful discussion . - ISSN 1932-7447. - ISSN 1932-7455

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
SIMULTANEOUSLY HIGH-PRESSURE
SODIUM FORMATE
RAMAN-SPECTRA
Аннотация: Anhydrous carbonate shortite, Na2Ca2(CO3)3, compressed in water at high pressure–temperature (up to 5 GPa, 350 °C) was studied by Raman spectroscopy. At 3.2 GPa and 250 °C, shortite begins to dissolve, followed by crystallization of aragonite and aragonite’. The unusual behavior of aqueous carbonate fluid was observed at 4.8 GPa and 300–350 °C. This process is characterized by the active formation of microbubbles within 2–60 s that are inserted one into another. Microbubbles are considered to be a result of the two immiscible fluid stratification. This dynamical immiscibility of the fluid accompanies the appearance of several crystalline carbonates and organic molecular crystals. Na-formate and some polymorphs of Ca-formate were observed.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Sobolev Inst Geol & Mineral SB RAS, Novosibirsk 630090, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Goryainov, Sergey, V; Krylova, S. N.; Крылова, Светлана Николаевна; Borodina, Ulyana O.; Krylov, A. S.; Крылов, Александр Сергеевич; RFBRRussian Foundation for Basic Research (RFBR); DFGGerman Research Foundation (DFG)European Commission [21-52-12018]; Ministry of Science and Higher EducationMinistry of Science and Higher Education, PolandEuropean Commission
}
Найти похожие

10.

Solid-phase transformation of Cs+- and Sr2+-bearing zeolite sorbents derived from cenospheres to mineral-like forms / S. N. Vereshchagin [et al.] // Materials Research Society Symposium Proceedings. - 2009. - Vol. 1193: 32nd Symposium on Scientific Basis for Nuclear Waste Management (24 May 2009 through 29 May 2009, St. Petersburg, ) Conference code: 79940. - P87-94 . - ISBN 02729172 (ISSN); 9781605111667 (ISBN)
Кл.слова (ненормированные):
Apparent activation energy -- Cenospheres -- Crystalline minerals -- Crystalline phasis -- Crystallization temperature -- Higher temperatures -- Long-term disposal -- Multi phase systems -- Pollucites -- Principal Components -- Solid-phase transformation -- Temperature range -- Thermal treatment -- Thermochemical transformations -- Transformation temperatures -- XRD analysis -- Activation energy -- Atmospheric pressure -- Cesium -- Crystalline materials -- Crystallization -- Fly ash -- Metallic glass -- Radioactive waste disposal -- Radioactive wastes -- Silicate minerals -- Sodium -- Sorbents -- Sorption -- Strontium -- Synthesis (chemical) -- Waste management -- Atmospheric temperature
Аннотация: The paper describes the studies of the transformation of Cs+- and Sr2+-containing zeolite sorbents synthesized from fly ash cenospheres to crystalline mineral composition, suitable for the long-term disposal. Series of Cs+- and Sr2+-exchanged NaP1-containing sorbents were subjected to the thermochemical transformation in the temperature range 40-1100°C at atmospheric pressure in air and the progress of reaction was monitored by DSC and XRD analysis. It was shown that initial sodium zeolite undergoes two-step transformation at 736-785°C and 892-982°C forming nepheline as the principle product, with the conversion temperatures being dependant on the heating rate. The thermal treatment of Cs+-bearing zeolite sorbent led to formation of a complex multiphase system, the principal components of which were nepheline and pollucite. Increasing cesium content in the samples led to a monotonous shift of crystallization peak to the higher temperature range (1005-1006°C). A more complicated behavior was observed for Sr2+-containing samples, for which the crystallization temperature tends to increase (compared with NaP1) at lower Sr contents, but it starts decreasing parallel to the Sr2+ content at Sr2+ loadings 10 mg/g. The principal crystalline phases in Sr-NaP1 sample conversion were nepheline and Sr2+- containing feldspar, the quantity of which increased parallel to the increase of strontium content in zeolite. Apparent activation energies of thermochemical transformations were calculated and possible approaches to reduce transformation temperature are discussed and experimentally illustrated. © 2009 Materials Research Society.

Scopus,
eLibrary,
Источник статьи
Держатели документа:
Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx Street, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Vereshchagin, S.N.; Vereshchagina, T.A.; Solovyov, L.A.; Shishkina, N.N.; Vasilieva, N.G.; Anshits, A.G.
}
Найти похожие

11.

Multicomponent flux growth and composition control of Cu2MnBO5:Ga ludwigites / E. Moshkina, A. Krylov, D. Kokh [et al.] // CrystEngComm. - 2022. - Vol. 24, Is. 19. - P. 3565-3575, DOI 10.1039/d2ce00258b. - Cited References: 26. - This study was supported by the Russian Science Foundation (Grant No. 21-72-00130). The Raman, X-ray, and EDX data were obtained using the analytical equipment of the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” . - ISSN 1466-8033
Кл.слова (ненормированные):
Bismuth compounds -- Boron compounds -- Copper compounds -- Crystal symmetry -- Energy dispersive spectroscopy -- Gallium -- Manganese oxide -- Positive ions -- Sodium compounds
Аннотация: To reach the concentration phase boundary between antiferromagnetic Cu2GaBO5 and ferrimagnetic Cu2MnBO5 ludwigites, solid solutions Cu2Mn1−xGaxBO5 (x = 0.05, 0.1, 0.15, 0.175) were grown by the flux technique using a multi-component solvent based on Bi2Mo3O12 with the addition of Na2B4O7 which significantly influenced the crystal formation and cation composition of the studied compounds. The content of the flux system was corrected taking into account the earlier established relationship of the partition coefficients of Mn2O3 and Ga2O3. The influence of the solvent components on the ludwigite crystallization was analyzed. The maximum size of the grown crystal was 1 × 1 × 4 mm3. The structure and cation composition of the grown compounds were studied using X-ray (X-ray diffraction, EDX (energy-dispersive X-ray spectroscopy)) and vibrational (Raman) spectroscopy techniques. The phase boundary of Cu2MnBO5–Cu2GaBO5 was found to be in the concentration range of x = 0.15–0.175, corresponding to a change in the monoclinic axis direction and a leap in the lattice parameters. The symmetry evolution of metal–oxygen octahedra for four nonequivalent cation positions was analyzed, and the unique crystal structure of Cu2MnBO5 demonstrated high rigidity relative to the introduction of Ga3+ cations. The polarized Raman spectra of monoclinic ludwigites were obtained and studied for the first time. A comparison of the spectra of the studied samples in both phases and orthorhombic ludwigites was made. A number of spectral features due to the monoclinic distortions in the crystal were found. In agreement with the Raman experiment, the concentration phase boundary was close to 0.15.

Смотреть статью,
Scopus
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, 660037, Russian Federation
Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
St Petersburg University, St Petersburg, 199034, Russian Federation

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Krylov, A. S.; Крылов, Александр Сергеевич; Kokh, D.; Shabanova, K.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bovina, A. F.; Бовина, Ася Федоровна; Plyaskin, M.; Пляскин, Михаил Е.; Rostovtsev, N.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
Найти похожие

12.

    Ultra-broad-band-excitable Cu(I)-based organometallic halide with near-unity emission for light-emitting diode applications / J. Huang, B. Su, E. Song [et al.] // Chem. Mater. - 2021. - Vol. 33, Is. 12. - P. 4382-4389, DOI 10.1021/acs.chemmater.1c00085. - Cited References: 43. - This research was supported by the National Natural Science Foundation of China (Grant Nos. 51961145101 and 51972118), the Fundamental Research Funds for the Central Universities (D2190980), the Guangzhou Science and Technology Project (202007020005), International Cooperation Project of National Key Research and Development Program of China (2021YFE0105700), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). The reported study was also funded by RFBR according to research project no. 19-52-80003 . - ISSN 0897-4756
   Перевод заглавия: Металлоорганический галогенид на основе Cu (I) со сверхширокополосным возбуждением и излучением с квантовым выходом близким к единице для применения в светодиодах
Кл.слова (ненормированные):
Crown ethers -- Hybrid materials -- Light -- Luminescence -- Metal halide lamps -- Metal halides -- Organic light emitting diodes (OLED) -- Organometallics -- Sodium compounds -- Application prospect -- Excitation characteristics -- Green emission bands -- High color rendering index -- Luminescence mechanisms -- Luminescent material -- Photoluminescence quantum yields -- White light emitting diodes -- Copper compounds
Аннотация: Low-dimensional hybrid metal halides demonstrate broad-band emission and high photoluminescence quantum yield (PLQY) acting as excellent candidates for a new generation of luminescent materials in lighting fields. However, most luminescent metal halides can only be excited by ultraviolet radiation, and the discovery of high-efficient emitters with broad-band excitation characteristics, especially upon efficient blue light irradiation, is a challenge. Herein, a zero-dimensional (0D) Cu(I)-based organometallic halide (18-crown-6)2Na2(H2O)3Cu4I6 (CNCI) was prepared with a green emission band centered at 536 nm and a near-unity PLQY (91.8%) upon excitation of 450 nm. Importantly, the ultrabroad excitation band covering a 300-500 nm range was observed in CNCI, and the luminescence mechanism has been discussed in detail. A white light-emitting diode (WLED) was fabricated with high luminous efficiency of 156 lm/W and a high color rendering index of 89.6. This work provides guidance for designing high-performance luminescent metal halides with suitable excitation characteristics and also promotes the application prospects of such materials in WLED fields.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation

Доп.точки доступа:
Huang, J.; Su, B.; Song, E.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Z.
}
Найти похожие

13.

    The electronic and optical properties of a narrow-band red-emitting nanophosphor K2NaGaF6:Mn4+ for warm white light-emitting diodes / C. Jiang [et al.] // J. Mater. Chem. C. - 2018. - Vol. 6, Is. 12. - P. 3016-3025, DOI 10.1039/c7tc05098d. - Cited References: 55. - We acknowledge the financial support received from the Program for Innovative Research Team in University of Ministry of Education of China (Grant No. IRT_17R38), the Key Program of Guangzhou Scientific Research Special Project (Grant No. 201607020009), the National Natural Science Foundation of China (Grant No. 51672085, 51322208, 3160440), and the Fundamental Research Funds for the Central Universities. M. G. Brik acknowledges the supports received from the Recruitment Program of High-end Foreign Experts (Grant No. GDW20145200225), the Programme for the Foreign Experts offered by Chongqing University of Posts and Telecommunications, Ministry of Education and Research of Estonia, (Project PUT430) and European Regional Development Fund (Project TK141), and the Guest Professorship at Kyoto University (Prof. S. Tanabe laboratory). The first-principles calculations were carried out using the resources provided by the Wroclaw centre for Networking and Supercomputing (http://wcss.pl; Grant No. WCSS#10117290). . - ISSN 2050-7534
   Перевод заглавия: Электронные и оптические свойства узкополосного нанолюминофора K2NaGaF6:Mn4+ , излучающего красный свет, для белых светодиодов излучающих теплый белый свет
Кл.слова (ненормированные):
Energy efficiency -- Gallium compounds -- Light emission -- Light emitting diodes -- Manganese -- Manganese compounds -- Optical properties -- Phosphors -- Precipitation (chemical) -- Quenching -- Rietveld refinement -- Sodium compounds
Аннотация: Recently, as a key red component in the development of warm white light-emitting diodes (WLEDs), Recently, as a key red component in the development of warm white light-emitting diodes (WLEDs), Mn4+-doped fluorides with narrow red emission have sparked rapidly growing interest because they improve color rendition and enhance the visual energy efficiency. Herein, a red nanophosphor, K2NaGaF6:Mn4+, with a diameter of 150-250 nm has been synthesized using a simple co-precipitation method. Rietveld refinement reveals that it crystallizes in the space group Fm3m with the cell parameter a = 8.25320(4) Å. The exchange charge model (ECM) has been used to calculate the energy levels of Mn4+ ions in K2NaGaF6, which match well with the experimental spectra. The as-synthesized phosphor exhibits a narrow red emission at around 630 nm (spin-forbidden 2Eg → 4A2 transition of Mn4+ ions) when excited at 365 nm (4A2g → 4T1g) and 467 nm (4A2g → 4T2g), with a quantum efficiency (QE) of 61% and good resistance to thermal quenching. Based on the structure, the formation mechanism of ZPL has been discussed. In addition, the concentration-dependent decay curves of Mn4+ in K2NaGaF6 were fitted using the Inokuti-Hirayama model, suggesting that the dipole-dipole interactions determine the concentration quenching. Finally, encouraged by the good performance, a warm LED with a CRI of 89.4 and CCT of 3779 K was fabricated by employing the title nanophosphor as the red component. Our findings suggest that K2NaGaF6:Mn4+ can be a viable candidate for the red phosphor used in warm WLEDs.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
China-Germany Research Center for Photonic Materials and Device, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
School of Applied Physics and Materials, Wuyi University Jiangmen, Guangdong, China
College of Mathematics and Physics, Chongqing University of Posts and Telecommunications, Chongqing, China
Institute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu, Estonia
Institute of Physics, Jan Dlugosz University, Armii Krajowej 13/15, Cz?stochowa, Poland
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong

Доп.точки доступа:
Jiang, C.; Brik, M. G.; Li, L.; Peng, J.; Wu, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wong, K. -L.; Peng, M.
}
Найти похожие

14.

Dzebisashvili, D. M.
London Penetration Depth as a Test of Order Parameter Symmetry in Sodium Cobaltate Superconductors / D. M. Dzebisashvili, A. B. Klyuchantsev // Symmetry-Basel. - 2019. - Vol. 11, Is. 5. - Ст. 633, DOI 10.3390/sym11050633. - Cited References: 43. - The work was financially supported by the Russian Foundation for Basic Research (RFBR) (project no. 18-02-00837) and by the program of the Presidium of the Russian Academy of Sciences No. 12 "Fundamental problems of high-temperature superconductivity". . - ISSN 2073-8994

РУБ Multidisciplinary Sciences
Рубрики:
SPIN
   DEPENDENCE
   POWDER
   CHARGE
   PHASE
   GAP
Кл.слова (ненормированные):
chiral order parameter -- London penetration depth -- sodium cobaltate superconductor
Аннотация: Temperature dependence of the magnetic field penetration depth λ was calculated for water intercalated sodium cobaltate superconductor NaxCoO2⋅yH2O. Assuming that the system is in the chiral d+id–wave superconducting state, it was shown that the shifting of the excitation spectrum nodal points off the normal phase Fermi surface due to variation of the sodium content x changes the functional form of the temperature dependence of λ−2 from exponential to linear in the low temperatures region. It is argued that this change in the functional form of T–dependence of the λ−2 can serve as a proof for the chiral symmetry of the superconducting order parameter in the sodium cobaltate.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ
Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Klyuchantsev, Andrey B.; Дзебисашвили, Дмитрий Михайлович; Russian Foundation for Basic Research (RFBR) [18-02-00837]; Presidium of the Russian Academy of Sciences [12]
}
Найти похожие

15.

Physical properties of a frustrated uasi-one-dimensional NaCuFe2(VO4)3 magnet and effect of chemical pressure induced by the substitution of sodium for lithium / T. V. Drokina, G. A. Petrakovskii, O. A. Bayukov [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 2. - P. 297-307, DOI 10.1134/S1063783420020122. - Cited References: 22 . - ISSN 1063-7834
Кл.слова (ненормированные):
multicomponent vanadates -- structural features -- magnetic properties -- phase transitions -- chemical pressure
Аннотация: The structural, thermal, static magnetic, and resonance properties of the low-dimensional NaCuFe2(VO4)3 compound obtained by the solid-phase synthesis have been investigated. In the temperature range of 110–300 K, the electron spin resonance in the X band with a g factor of 2.008 has been detected. The magnetic properties of a sample with a high frustration level in the paramagnetic, antiferromagnetic, and disordered states have been examined. A shift of the Neel temperature to the high-temperature region in an external magnetic field has been observed. The origin of the disordered magnetism in NaCuFe2(VO4)3 are discussed. The features of substitution of sodium for lithium on the physical properties of the ACuFe2(VO4)3 (A = Na, Li) system have been established. It is shown that the chemical pressure changes the crystal lattice parameters, spacings between magnetic ions, and crystallite size, which is reflected in the physical properties of the material.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ

Публикация на русском языке_ Физические свойства фрустрированного квазиодномерного магнетика NaCuFe2(VO4)3 и влияние химического давления при замещении натрия литием [Текст] / Т. В. Дрокина [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 2. - С. 247-256

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:
Drokina, T. V.; Дрокина, Тамара Васильевна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Bayukov, O. A.; Баюков, Олег Артемьевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Popkov, S. I.; Попков, Сергей Иванович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
Найти похожие

16.

Vasiliev, A. D.
Polymorphism of KNaNbOF5 crystals / A. D. Vasiliev, N. M. Laptash // J. Struct. Chem. - 2012. - Vol. 53, Is. 5. - P. 902-906, DOI 10.1134/S0022476612050101. - Cited References: 11. - The work was supported by RFBR (grant No. 09-02-00062). . - ISSN 0022-4766

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
OXIDE FLUORIDE ANIONS
Кл.слова (ненормированные):
potassium-sodium oxopentafluoroniobate -- crystal structure -- O/F order -- concomitant polymorphism
Аннотация: X-ray crystallography is used to analyze the concomitant polymorphism of KNaNbOF5 crystals. The second beta-modification of the compound, crystallizing in the tetragonal crystal system is found for the first time: space group P4/nmm, a = 5.9352(2) , c =8.5487(5) , V = 301.14(2) (3), Z = 2, R1 = 0.0095. Parameters of the orthorhombic noncentrosymmetric structure of the alpha-phase, previously described by Poeppelmeier et al. (J. Am. Chem. Soc., 129, 13963-13969 (2007)), are refined and a comparative analysis of both structures is performed. The structures are characterized by the complete ordering of oxygen and fluorine atoms, the Nb-O distance in the alpha-phase (1.738(1) ) being noticeably longer than that in the beta-phase (1.709(2) ). In beta-KNaNbOF5, alternating NbOF5 and NaOF5 octahedra share vertices, while in alpha-KNaNbOF5, they share both vertices and edges. The existence of the non-polar centrosymmetric beta-modification of KNaNbOF5 cancels the assumption of the substantial contribution of potassium cations to the polar structure of alpha-KNaNbOF5.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ

Публикация на русском языке Васильев, Александр Дмитриевич. Полиморфизм кристаллов KNaNbOF5 [Текст] / А. Д. Васильев, Н. М. Лапташ // Журн. структ. химии. - Новосибирск : Изд-во СО РАН, 2012. - Т. 53 № 5. - С. 922-926

Держатели документа:
[Vasiliev, A. D.] Russian Acad Sci, Siberian Div, LV Kirenskii Inst Phys, Krasnoyarsk, Russia
[Laptash, N. M.] Russian Acad Sci, Inst Chem, Far Eastern Div, Vladivostok 690022, Russia

Доп.точки доступа:
Laptash, N. M.; Васильев, Александр Дмитриевич
}
Найти похожие

17.

Studies of the heat capacity and thermal expansion of the Na0.95K0.05NbO3 solid solution / M. V. Gorev [et al.] // Phys. Solid State. - 2014. - Vol. 56, Is. 2. - P. 367-372, DOI 10.1134/S1063783414020115. - Cited References: 27. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-4828.2012.2) and the Russian Foundation for Basic Research (project no. 12-02-31799 mol_a). . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
SODIUM NIOBATE
   PHASE-TRANSITIONS
   TEMPERATURE-RANGE
   SINGLE-CRYSTALS
   KNBO3
   FERROELECTRICS
   DIFFRACTION
   OCTAHEDRA
Аннотация: The heat capacity and thermal expansion of ceramic samples of the Na0.95K0.05NbO3 solid solution have been investigated over a wide temperature range of 100-750 K. The observed anomalies in the heat capacity and thermal expansion at T (4) = 297 K, T (3) = 535 K, T (2) = 665 K, and T (1) a parts per thousand 710 K correspond to the sequences of phase transitions N - Q - G - S - T1. It has been shown that, as a result of the phase transitions, the unit cell volume at T (4) and T (2) decreases, and at T (3) and T (1), increases with increasing temperature. The directions of the shift of the phase transition temperatures induced by hydrostatic pressure have been determined. It has been established that all structural transformations are accompanied by relatively small variations in the entropy. Different mechanisms of the structural distortions have been discussed.

Смотреть статью,
Scopus,
WoS,
Читать в сети ИФ

Публикация на русском языке Исследования теплоемкости и теплового расширения твердого раствора Na0.95K0.05NbO3 [Текст] / М. В. Горев [и др.] // Физ. тверд. тела. - 2014. - Т. 56 Вып. 2. - С. 362-367

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia
Southern Fed Univ, Inst Phys Res, Rostov Na Donu 344090, Russia

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Raevskaya, S. I.; Ivliev, M. P.; Raevskii, I. P.; Flerov, I. N.; Флёров, Игорь Николаевич; Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation [NSh-4828.2012.2]; Russian Foundation for Basic Research [12-02-31799 mol_a]
}
Найти похожие

18.

Effect of sodium hypophosphite content to the deposition rate, structure and magnetic properties of electroless deposited Ni-P alloy / R. N. Yaroslavtsev [et al.] // Solid State Phenom. : Selected, peer reviewed papers. - 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P. 237-241, DOI 10.4028/www.scientific.net/SSP.215.237. - Cited References: 15 . - ISSN 978-30383. - ISSN 1662-9779
Кл.слова (ненормированные):
Electroless coatings -- Nickel-phosphorus alloy
Аннотация: The deposition kinetics, structure and magnetic properties of electroless deposited films Ni-P were investigated depending on the amount of sodium hypophosphite in the electroless bath. It was found that the film deposition rate is linear and unambiguously varies with the hypophosphite content from 2 to 13 g/l and from 23 to 25 g/l. The deposition rate varies widely in the hypophosphite concentration range from 13 to 23 g/l. The films are composed of amorphous Ni-P phase and fcc Ni-P solid solution with phosphorus content from 1 to 4 at.% P according to X-ray diffraction. The partial amount of amorphous phase is increased with concentration of sodium hypophosphite. The ferromagnetic resonance field is independent on the concentration of sodium hypophosphite, which assumes to be result from the laminated allocation of the amorphous and fcc phases in the film. © (2014) Trans Tech Publications, Switzerland.

Читать в сети ИФ

Доп.точки доступа:
Ovchinnikov, S. G. \ed.\; Овчинников, Сергей Геннадьевич; Samardak, A. \ed.\; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; sept. ; 15-21 ; Vladivostok)
}
Найти похожие

19.

Popov, E. A.
Temperature and field dependence of exciton-magnon absorption of NaMnCl//3. / E. A. Popov, M. M. Kotlyarskii, I. S. Edelman // Physica Status Solidi B - Basic Research. - 1985. - Vol. 132, Is. 2. - P. 465-470 . - ISSN 0370-1972
Кл.слова (ненормированные):
BAND STRUCTURE -- LIGHT - Absorption -- SODIUM COMPOUNDS - Optical Properties -- EXCITON-MAGNON ABSORPTION -- SODIUM MANGANESE CHLORIDE -- MAGNETIC MATERIALS
Аннотация: The behaviour of the optical absorption bands of NaMnCl//3 is experimentally studied in the region of the **6A//1//g to **4A//1//g, **4E//g(**4G) transition of the Mn**2** plus ion in the temperature range 1. 8 to 20 K and in magnetic fields up to 20 T. Exciton and its 'hot' magnon sidebands are observed in the spectrum. The anomalous temperature dependence of the exciton-magnon bands intensity is explained by participation of magnons with wave vector K does not equal 0 in absorption. The low energy exciton-magnon band is supposed to be due to simultaneous creation of an exciton and annihilation of three thermally created magnons.

Scopus

Доп.точки доступа:
Kotlyarskii, M. M.; Edelman, I. S.; Эдельман, Ирина Самсоновна
}
Найти похожие

20.

Теплофизические свойства керамики ниобата натрия в широкой области температур / В. С. Бондарев [и др.] // Физ. тверд. тела. - 2013. - Т. 55, Вып. 4. - С. 752-758. - Работа выполнена при финансовой поддержке гранта Президента РФ по поддержке ведущих научных школ РФ (НШ-4828.2012.2) и гранта РФФИ N 12-02-31799\_мол\_а.
Аннотация: Выполнены исследования теплоемкости Cp(T) и коэффициента теплового расширения alpha(T) керамики NaNbO3 в области температур 2-800 K. Помимо аномалий, связанных с известными фазовыми переходами при T6~265 K, T5~638 K, T4~760 K и T3~793 K, обнаружены особенносaти поведения Cp(T) и alpha(T) вблизи T5''~500 K и T5'~600 K. Установлено, что все наблюдавшиеся структурные превращения в соответствии с величинами изменения энтропии не связаны с процессами упорядочения структурных элементов. Показано, что с ростом температуры объем ячейки при фазовых переходах вблизи 265, 515, 604 и 638 K убывает. Исследованы особенности перехода в фазу R3c . Проведен анализ двух возможных сценариев реализации последовательности фазовых превращений в интервале между T5 и T6.

Смотреть статью,
Читать в сети ИФ

Переводная версия Thermal and physical properties of sodium niobate ceramics over a wide temperature range. - [Б. м. : б. и.]

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

Доп.точки доступа:
Бондарев, Виталий Сергеевич; Bondarev V.S.; Карташев, Андрей Васильевич; Kartashev A.V.; Горев, Михаил Васильевич; Gorev M.V.; Флёров, Игорь Николаевич; Flerov, I. N.; Погорельцев, Евгений Ильич; Pogoreltsev E.I.; Молокеев, Максим Сергеевич; Molokeev M.S.; Раевская, С. И.; Суздалев, Д. В.; Раевский, И. П.
}
Найти похожие