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1.
Makarov, N. P.
Effective upconversion of CO2-laser radiation in
sodium
vapors / N. P. Ьakarov, A. K. Popov, V. P. Timofeev> // Appl. Phys. B. - 1983. -
Vol. 30
,
Is. 1
. - P. 53-55,
DOI
10.1007/BF00692659. - Cited References: 17 . - ISSN 0721-7269
РУБ
Physics, Applied
Кл.слова (ненормированные):
42.65
--
42.80
--
LASERS, CARBON DIOXIDE
--
SODIUM
AND ALLOYS
--
LIGHT
WOS
,
Scopus
Держатели документа:
Siberian Branch, L. V. Kirensky Institute of Physics, USSR Academy of Sciences, Krasnoyarsk, SU-660036, Russia
Доп.точки доступа:
Popov, A. K.; Попов, Александр Кузьмич; Timofeev, V. P.
}
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2.
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
}
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3.
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
}
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4.
Acoustooptic and elastic
properties of NaBi(WO4)2 and LiBi(MoO4)2crystals / K. S. Aleksandrov [et al.]> //
Russ. Ultrason. - 1988. -
Vol. 18
,
Is. 3
. - P. 168-171 . - ISSN 0048-8828
Кл.слова (ненормированные):
Acoustooptical Devices--Materials
--
Elasticity
--
Lithium Compounds
--
Sodium
Compounds
--
Acoustooptic Properties
--
Bulk Acoustic Waves
--
Elastic Properties
--
Crystals
Аннотация:
In recent years interest has been shown in crystals with the scheelite structure (point symmetry group 4/m) as promising materials for acoustooptic devices. However, nearly all the work done so far has been on the NaBi(MoO4)2 and PbMoO4 crystals. In this paper the authors give the results of a study of the elastic and acoustooptic properties of NaBi(WO4)2 and LiBi(MoO4)2 crystals from a series of isomorphic compounds with the scheelite structure carried out in order to determine the extent of the changes in the elastic and acoustooptic properties of this series of crystals when the structural elements are changed.
Scopus
Держатели документа:
USSR Acad of Sciences, Russian Federation
Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Burkov, S. I.; Samkov, A. V.; Kholov, A.; Khafizov, S.Kh.; Shabanova, L. A.; Klevtsov, P. V.; Красноярский государственный университет
}
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5.
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.
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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.
}
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6.
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.
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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.
}
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7.
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.
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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
}
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8.
Magnetic properties and
the metal-insulator transition in GdXMn1-XS solid solutions / O. B. Romanova [et al.]> // Solid State Commun. - 2010. -
Vol. 150
,
Is. 13-14
. - P. 602-604,
DOI
10.1016/j.ssc.2009.12.042. - Cited References: 13. - This study was supported by the Russian Foundation for Basic Research project No. 09-02-00554_a; No. 09-02-92001-NNS_a; No. 08-02-90031 Bel_a and Belarus Foundation for Basic Research project No. F04-182; ADTF "Development of scientific potential of the higher school" No. 2.1.1/401. . - ISSN 0038-1098
РУБ
Physics, Condensed Matter
Кл.слова (ненормированные):
Insulator
--
Metals
--
Crystal growth
--
Phase transitions
--
Insulator
--
Metals
--
Crystal growth
--
Phase transitions
--
Insulator
--
Metals
--
Antiferromagnetic semiconductors
--
Crystal growth
--
Cubic lattice
--
Metal-insulator phase transition
--
Orders of magnitude
--
P-type
--
Temperature range
--
Thermoelectric properties
--
Thermopowers
--
Antiferromagnetic materials
--
Antiferromagnetism
--
Crystal growth
--
Crystallization
--
Electric properties
--
Gadolinium
--
Grain boundaries
--
Magnetic fields
--
Magnetic properties
--
Manganese
--
Manganese compounds
--
Metal insulator boundaries
--
Metals
--
Semiconductor growth
--
Semiconductor insulator boundaries
--
Sodium
chloride
--
Solid solutions
--
Solidification
--
Metal insulator transition
Аннотация:
The structural, magnetic, electrical, and thermoelectric properties of GdXMn1-XS (0.01 <= X <= 0.3) solid solutions synthesized for the first time on the basis of alpha-MnS have been studied experimentally in the temperature range 77-1000 K in magnetic fields up to 10 kOe. The synthesized samples are antiferromagnetic semiconductors with an NaCl-type cubic lattice typical of a-MnS. Both concentration (X-c = 0.3) and temperature (T-c = 450 K) metal-insulator phase transitions have been observed. The concentration metal-insulator transition is accompanied by a decrease in resistivity and thermopower by twelve and two orders of magnitude, respectively, with the change in conductivity from p-type to n-type. (C) 2010 Elsevier Ltd. All rights reserved.
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Держатели документа:
[Romanova, O. B.
Ryabinkina, L. I.
Velikanov, D. A.
Balaev, D. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Sokolov, V. V.
Pichugin, A. Yu.] Russian Acad Sci, Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia
[Galyas, A. I.
Demidenko, O. F.
Makovetskii, G. I.
Yanushkevich, K. I.] Natl Acad Sci Belarus, GO NPTs Mat Sci Ctr, Minsk 220072, Byelarus
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, 660036 Krasnoyarsk, Russian Federation
Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, 630090 Novosibirsk, Russian Federation
GO NPTs Materials Science Center, National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Sokolov, V. V.; Pichugin, A. Y.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Galyas, A. I.; Demidenko, O. F.; Makovetskii, G. I.; Yanushkevich, K. I.
}
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9.
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.
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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
}
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10.
Thermal and physical
properties of
sodium
niobate ceramics over a wide temperature range / V. S. Bondarev [et al.]> // Phys. Solid State. - 2013. -
Vol. 55
,
Is. 4
. - P. 821-828
DOI
10.1134/S1063783413040045
Аннотация:
The temperature dependences of the heat capacity C p (T) and thermal expansion coefficient α(T) of NaNbO3 ceramic samples have been investigated in the temperature range from 2 to 800 K. In addition to the anomalies associated with the known phase transitions at temperatures T 6 ≈ 265 K, T 5 ≈ 638 K, T 4 ≈ 760 K, and T 3 ≈ 793 K, anomalies in the behavior of C p (T) and α(T) have been observed near T 5″ ≈ 500 K and T 5′ ≈ 600 K. It has been found that all the observed structural transformations, according to the values of the entropy change, are not related to the ordering of structural elements. It has been shown that, with an increase in the temperature, the unit cell volume during the phase transitions near 265, 515, 604, and 638 K decreases. The specific features of the transition to the phase R3c have been examined. Two possible scenarios of the sequence of phase transformations in the temperature range between T 5 and T 6 have been analyzed.
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Теплофизические свойства керамики ниобата натрия в широкой области температур // Физика твердого тела. - 2013. - Т. 55, Вып. 4. - С. 752-758
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:
Bondarev, V. S.; Бондарев, Виталий Сергеевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Pogoreltsev, E. I.; Погорельцев, Евгений Ильич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Raevskaya, S. I.; Suzdalev, D. V.; Raevskii, I. P.
}
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11.
Magnetic and thermophysical
properties of GdxMn1-xS solid solutions / S. S. Aplesnin [et al.]> // J. Phys.: Condens. Matter. - 2013. -
Vol. 25
,
Is. 2
. - Ст. 025802. - P. ,
DOI
10.1088/0953-8984/25/2/025802 . - ISSN 0953-8984
Кл.слова (ненормированные):
Antiferromagnetic orders
--
Band state
--
Face-centered cubic lattices
--
Magnetic phase transitions
--
Paramagnetic phase
--
Temperature dependence
--
Antiferromagnetism
--
Electron transitions
--
Gadolinium
--
Manganese
--
Paramagnetism
--
Sodium
chloride
--
Specific heat
--
Organic polymers
Аннотация:
The structural, magnetic, and thermophysical properties of cation-substituted sulfides GdXMn1-XS (0.04 ? X ? 0.25) with the NaCl-type face-centered cubic lattice have been investigated. The range of existence of long-range antiferromagnetic order has been established. The anomalies observed in the temperature dependence of the specific heat correspond to the temperatures of the magnetic phase transition. The anomaly in the specific heat caused by electron transitions between the 4f levels and d band states has been observed. It has been found that the coefficient of thermal expansion decreases with increasing concentration of substituents in the magnetically ordered region and remains nearly invariable in the paramagnetic phase. В© 2013 IOP Publishing Ltd.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Daghestan Sci Ctr, Amirkhanov Inst Phys, Makhachkala 367003, Russia
Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Romanova, O.; Романова, Оксана Борисовна; Gorev, M. V.; Горев, Михаил Васильевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gamzatov, A. G.; Aliev, A. M.
}
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12.
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.
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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.
}
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13.
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.
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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]
}
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14.
Crystal and magnetic
properties of the new copper-
sodium
borate CuNaB3O6 · 0.842H2O / A. M. Vorotynov [et al.]> // J. Exp. Theor. Phys. - 2014. -
Vol. 119
,
Is. 3
. - P. 532-541,
DOI
10.1134/S1063776114080202. - Cited References: 20 . - ISSN 1063-7761. - ISSN 1090-6509
РУБ
Physics, Multidisciplinary
Рубрики:
ALPHA'-NaV2O5
CuGeO3
Аннотация:
A new compound CuNaB3O6 · 0.842H2O was grown for the first time. Its crystal structure, magnetic susceptibility, and magnetic resonance properties are presented. It was proposed that CuNaB3O6 · 0.842H2O is a spin-Peierls magnet with the transition temperature T SP - 128 K and a ladder spin structure. The possibility of a structural phase transition at T ˂ T SP is predicted.
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Публикация "на русском языке"
Crystal and magnetic properties of the new copper-
sodium
borate CuNaB3O6 · 0.842H2O [Текст] / A. M. Vorotynov [et al.] // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 146 Вып. 3.- С.607-617
Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Vorotynov, A. M.; Воротынов, Александр Михайлович; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Rudenko, V. V.; Руденко, Валерий Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Vorotynova, O. V.; Воротынова, Ольга Владленовна
}
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15.
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.
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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)
}
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16.
Crystal and magnetic
properties of the new copper-
sodium
borate CuNaB3O6 · 0.842H2O / A. M. Vorotynov [et al.]> // Журн. эксперим. и теор. физ. - 2014. -
Т. 146
,
Вып. 3
. - С. 607-617,
DOI
10.7868/S004445101409020X. - Библиогр.: 20 назв. . - ISSN 0044-4510
Аннотация:
A new compound CuNaB3O6 · 0.842H2O was grown for the first time. Its crystal structure, magnetic susceptibility, and magnetic resonance properties are presented. It was proposed that CuNaB3O6 · 0.842H2O is a spin-Peierls magnet with the transition temperature T SP ∼ 128 K and a ladder spin structure. The possibility of a structural phase transition at T ˂ T SP is predicted.
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"Переводная" версия
Crystal and magnetic properties of the new copper-
sodium
borate CuNaB3O6 · 0.842H2O [Текст] / A. M. Vorotynov [et al.] // J. Exp. Theor. Phys. : Pleiades Publishing, 2014. - Vol. 119 Is. 3.- P.532-541
Держатели документа:
[Vorotynov, A.
Vasiliev, A.
Rudenko, V.
Bayukov, O.
Velikanov, D.
Ovchinnikov, S.] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Vorotynova, O.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Vorotynov, A. M.; Воротынов, Александр Михайлович; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Rudenko, V. V.; Руденко, Валерий Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Vorotynova, O. V.; Воротынова, Ольга Владленовна
}
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17.
Вальков, Валерий Владимирович
.
Природа эффективных взаимодействий, индуцирующих сверхпроводящую фазу с киральным параметром порядка в кобальтитах натрия / В. В. Вальков, Т. А. Валькова, В. А. Мицкан> //
Физика бессвинцовых пьезоактивных и родственных материалов (Анализ современного состояния и перспективы развития) (LFPM-2015) : труды. - Ростов-на-Дону : Изд-во ЮФУ, 2015. -
Т. 1
. - С. 90-92. - Библиогр.: 6 назв. . - ISBN 978-5-9275-1648-3
Перевод заглавия:
Nature of the effective interactions induces uperconducting phase with a chiral order parameter in the
sodium
cobaltites
Аннотация:
На основе анализа электронной структуры NaxCoO2 при учете сильных корреляций методом операторной формы теории возмущений получен эффективный гамильтониан, описывающий антиферромагнитный тип связи между локализованными состояниями ионов кобальта на треугольной решетке и перескоки электронов в верхней хаббардовской подзоне. Существенно, что учет всех процессов второго порядка по параметру перескока в режиме большого хаббардовского отталкивания электронов с противоположными проекциями спина на одном центре приводит к трехцентровым слагаемым эффективного гамильтониана, описывающим коррелированные перескоки. Эти слагаемые существенно влияют как на характер разрушения мтрехподрешеточной структуры антиферромагнитного упорядочения при допировании, так и на условия реализации сверхпроводящей фазы с киральным параметром порядка.
In the framework of the operator form of perturbation theory an effective Hamiltonian, describing the antiferromagnetic type of the coupling between localized states of the cobalt ions on the triangular lattice and electron hoppings in the upper Hubbard subband, is derived basing on the analysis of the electronic structure of NaxCoO2 and at the accounting the strong correlation. It is essential that account for all the processes of the second order in the hopping parameter at the high Hubbard repulsion of electrons located on one site and possessing the opposite spin projections leads to threecenter terms in the effective Hamiltonian, which describe the correlated hoppings. These terms affect substantially the nature of the destruction of the three-sublattice structure of antiferromagnetic ordering with doping and impact on the conditions for the implementation of the superconducting phase with a chiral order parameter
Материалы конференции
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Валькова, Татьяна Александровна; Val'kova T. A.; Мицкан, Виталий Александрович; Mitskan, V. A.; Val'kov, V. V.; "Физика бессвинцовых пьезоактивных и родственных материалов (Анализ современного состояния и перспективы развития)", международный междисциплинарный молодежный симпозиум(4 ; 2015 ; 2-6 сент. ; Ростов-на-Дону / Туапсе); Южный федеральный университет
}
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18.
Synthesis, structural and
spectroscopic properties of acentric triple molybdate Cs2NaBi(MoO4)3 / A. A. Savina [et al.]> // J. Solid State Chem. - 2015. -
Vol. 225
. - P. 53–58,
DOI
10.1016/j.jssc.2014.11.023. - Cited References: 66. - The authors are grateful to Dr. K.M. Khal'baeva and Dr. Irina A. Gudkova for their assistance in preparing the compound and taking X-ray single-crystal diffraction data. This study is partly supported by the Russian Foundation for Basic Research (Grants 13-03-01020 and 14-03-00298). V.V.A., A.S.K. and A.S.O. gratefully acknowledge the Ministry of Education and Science of the Russian Federation for a partial financial support. . - ISSN 0022-4596. - ISSN 1095-726X
Перевод заглавия:
Синтез, структурные и спектроскопические свойства ацентричного тройного молибдата Cs2NaBi(MoO4)3
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
CRYSTAL-STRUCTURE
SINGLE-CRYSTALS
VIBRATIONAL PROPERTIES
RAMAN-SPECTROSCOPY
HYDROTHERMAL SYNTHESIS
DIELECTRIC-PROPERTIES
SELECTIVE OXIDATION;
BISMUTH MOLYBDATES
IONIC-CONDUCTIVITY
OPTICAL-PROPERTIES
Кл.слова (ненормированные):
Triple molybdate
--
Sodium
--
Cesium
--
Bismuth
--
Crystal structure
--
Raman spectroscopy
--
CRYSTAL-STRUCTURE
--
SINGLE-CRYSTALS
--
VIBRATIONAL PROPERTIES
--
RAMAN-SPECTROSCOPY
--
HYDROTHERMAL SYNTHESIS
--
DIELECTRIC-PROPERTIES
--
SELECTIVE OXIDATION;
--
BISMUTH MOLYBDATES
--
IONIC-CONDUCTIVITY
--
OPTICAL-PROPERTIES
Аннотация:
New ternary molybdate Cs2NaBi(MoO4)3 is synthesized in the system Na2MoO4–Cs2MoO4–Bi2(MoO4)3. The structure of Cs2NaBi(MoO4)3 of a new type is determined in noncentrosymmetric space group R3c, a=10.6435(2), c=40.9524(7) Å, V=4017.71(13) Å3, Z=12 in anisotropic approximation for all atoms taking into account racemic twinning. The structure is completely ordered, Mo atoms are tetrahedrally coordinated, Bi(1) and Bi(2) atoms are in octahedra, and Na(1) and Na(2) atoms have a distorted trigonal prismatic coordination. The Cs(1) and Cs(2) atoms are in the framework cavities with coordination numbers 12 and 10, respectively. No phase transitions were found in Cs2NaBi(MoO4)3 up to the melting point at 826 K. The compound shows an SHG signal, I2w/I2w(SiO2)=5 estimated by the powder method. The vibrational properties are evaluated by Raman spectroscopy, and 26 narrow lines are measured.
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Держатели документа:
SB RAS, Baikal Inst Nat Management, Lab Oxide Syst, Ulan Ude 670047, Russia.
Buryat State Univ, Dept Chem, Ulan Ude 670000, Russia.
SB RAS, Rzhanov Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia.
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia.
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia.
SB RAS, Nikolaev Inst Inorgan Chem, Lab Crystal Chem, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Dept Nat Sci, Novosibirsk 630090, Russia.
SB RAS, Kirensky Inst Phys, Lab Mol Spectroscopy, Krasnoyarsk 660036, Russia.
SB RAS, Nikolaev Inst Inorgan Chem, Lab Epitaxial Layers, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Lab Res Methods Composit & Struct Funct Mat, Novosibirsk 630090, Russia.
SB RAS, Kirensky Inst Phys, Lab Crystal Struct, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660079, Russia.
SB RAS, Inst Automat & Elect, Lab Condenced Matter Spectroscopy, Novosibirsk 630090, Russia.
Доп.точки доступа:
Savina, A. A.; Atuchin, V. V.; Solodovnikov, S. F.; Solodovnikova, Z. A.; Krylov, A. S.; Крылов, Александр Сергеевич; Maximovsky, E. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Pugachev, A. M.; Khaikina, E. G.; Russian Foundation for Basic Research [4828.2012.2, 12-02-31205]; Federal Special Program "Scientific and scientific-pedagogical staff of innovative Russia" [8379]
}
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19.
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.
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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
}
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20.
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.
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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.
}
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© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)