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1.
A neutron scattering
and mu SR investigation of the magnetic phase transitions of CuB2O4 / M. . Boehm [et al.]> // Physica B. - 2002. -
Vol. 318
: 6th Patras-University Euroconference on Properties of Condensed Matter Probed with X-Ray Scattering-Electron Correlations and Magnetism (SEP 21-25, 2001, PATRAS, GREECE),
Is. 4
. - P. 277-281,
DOI
10.1016/S0921-4526(02)00788-3. - Cited References: 8 . - ISSN 0921-4526
РУБ
Physics, Condensed Matter
Рубрики:
COPPER METABORATE
Кл.слова (ненормированные):
magnetic soliton lattice
--
Dzyaloshinskii-Moriya interaction
--
neutron
diffraction
--
mu SR
Аннотация:
We have investigated the magnetic ground state in CuB2O4, copper metaborate, by means of neutron
diffraction
and muSR measurements. At T-N = 21 K CuB2O4 undergoes a second-order phase transition from a paramagnetic to an antiferromagnetic commensurate state followed by a second transition at T* = 10 K where the two magnetic sublattices form a soliton lattice, as reported earlier. We give a detailed analysis of the magnetic structure in the commensurate phase which is found to be different from the one published recently. New experimental results are presented which show the existence of a third transition below T approximate to 1.8 K. The magnetic structure remains incommensurate at very low temperatures, but a re-distribution of the magnetic intensities is observed in the neutron
diffraction
data set which suggests that the phases between the Cu2+ spins are changed. (C) 2002 Elsevier Science B.V. All rights reserved.
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Держатели документа:
Inst Laue Langevin, F-38042 Grenoble 9, France
Swiss Fed Inst Technol, Lab Neutron Scattering, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
RAS, Inst Phys SB, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Boehm, M.; Roessli, B.; Schefer, J.; Ouladdiaf, B.; Amato, A.; Baines, C.; Staub, U.; Petrakovskii, G. A.; Петраковский, Герман Антонович
}
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2.
A non-typical sequence
of phase transitions in (NH4)3GeF7: optical and structural characterization / S. V. Mel'nikova [et al.]> // Dalton Trans. - 2016. -
Vol. 45
,
Is. 12
. - P. 5321-5327,
DOI
10.1039/c5dt04907e. - Cited References:25. - The reported study was partially supported by RFBR, research project no. 15-02-02009 a . - ISSN 1477-9226. - ISSN 1477-9234
Перевод заглавия:
Необычная последовательность фазовых переходов в (NH4)3GeF7: Оптическое и структурное исследование
РУБ
Chemistry, Inorganic & Nuclear
Рубрики:
Crystal-structure
Powder
diffraction
NH4F
Fluorination
Аннотация:
Single crystals of germanium double salt (NH4)3GeF7 = (NH4)2GeF6·NH4F = (NH4)3[GeF6]F were grown and studied by the methods of polarization optics and X-ray
diffraction
. The birefringence Δn = (no − ne), the rotation angle of the optical indicatrix ϕ(T) and unit cell parameters were measured in the temperature range 100–400 K. Three structural phase transitions were found at the temperatures: T1↓ = 279.2 K (T1↑ = 279.4 K), T2↑ = 270 K (T2↓ = 268.9 K), T3↓ = 218 K (T3↑ = 227 K). An unusual sequence of symmetry transformations with temperature change was established: P4/mbm (Z = 2) (G1) ↔ Pbam (Z = 4) (G2) ↔ P21/c (Z = 4) (G3) ↔ Pa (Z = 8) (G4). The crystal structures of different phases were determined. The experimental data were additionally interpreted by a group-theoretical analysis of the complete condensate of order parameters taking into account the critical and noncritical atomic displacements. Strengthening of the N–H⋯F hydrogen bonds can be a driving force of the observed phase transitions.
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Держатели документа:
SB RAS, Lab Crystal Phys, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
RAS, Inst Chem, Far Eastern Branch, Vladivostok 690022, Russia.
Siberian Fed Univ, Krasnoyarsk 660074, Russia.
Доп.точки доступа:
Mel'nikova, S. V.; Мельникова, Светлана Владимировна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Laptash, N. M.; Misyul, S. V.; Мисюль, Сергей Валентинович; RFBR [15-02-02009 a]
}
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3.
Aleksandrov, K. S.
Hierarchies of perovskite-like crystals (Review) / K. S. Aleksandrov, V. V. Beznosikov> // Phys. Solid State. - 1997. -
Vol. 39
,
Is. 5
. - P. 695-715,
DOI
10.1134/1.1130120. - Cited References: 143 . - ISSN 1063-7834
Рубрики:
CU-O SYSTEM
HIGH-PRESSURE SYNTHESIS
SUPERCONDUCTING COPPER OXIDES
STRUCTURAL PHASE-TRANSITIONS
NEUTRON POWDER
DIFFRACTION
SINGLE-CRYSTAL
X-RAY
CUPRATE SUPERCONDUCTORS
DIELECTRIC-PROPERTIES
HOMOLOGOUS SERIES
Аннотация:
A system of mutual relationships (a hierarchy) is constructed between various perovskite-like crystal structures based on available structural data. All the perovskite-like structures are characterized by a common indicator of their relationship-the presence of layers, stacks, or frameworks made up of BX6 octahedra linked at their vertices (where B is a cation, X is an anion) or fragments of octahedra in the form of BX5 pyramids or BX4 squares in anion-deficient compounds. In layered structures, these stacks are joined to each other by various intermediate blocks. It is well known that one homological series of compounds is constructed by increasing the number of layers in a stack while preserving the same kind of connecting block. Crystals of various series that contain identical stacks (but different blocks of one or two types) can also be related to one another via this feature. The hierarchical system includes compounds with small distortions in their structures for various reasons. (C) 1997 American Institute of Physics.
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Публикация на русском языке
Александров, Кирилл Сергеевич. Иерархия перовскитоподобных кристаллов (Обзор) [Текст] / К. С. Александров, Б. В. Безносиков // Физ. тверд. тела. - Санкт-Петербург, 1997. - Т. 39 Вып. 5. - С. 785-808
Доп.точки доступа:
Beznosikov, B. V.; Безносиков, Борис Валерьевич; Александров, Кирилл Сергеевич
}
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4.
Aleksandrovsky, A. S.
Nonlinear optical processes and DUV generation in random domain structures of SBO / A. S. Aleksandrovsky> //
Conference on Lasers and Electro-Optics Europe - Technical Digest / Conference on Lasers and Electro-Optics (2015 ; may ; 10–15 ; San Jose, California, US) : IEEE-Institute Electrical and Electronics Engineers, 2015. -
Vol. 2015-August
. - Ст. 7184028,
DOI
10.1364/CLEO_SI.2015.STh3H.1. - Cited References: 3 . - ISBN 9781557529688 (ISBN)
РУБ
Engineering, Electrical & Electronic + Optics + Physics, Applied
Рубрики:
CRYSTAL
Кл.слова (ненормированные):
Correlation
--
Nonlinear optics
--
Optical
diffraction
--
Optical frequency conversion
--
Optical harmonic generation
--
Ultrafast optics
Аннотация:
Random domain structures in orthorhombic strontium tetraborate (α-SBO) are capable in enhancing nonlinear optical conversion efficiency for large variety of processes throughout all transparency window of this material, down to 121 nm. Properties of the material, origin of domains, frequency doubling and autocorrelation measurements, conversion of supercontinuum to UV and continuously tunable VUV generation are described. Prospects of biphoton field generation in α-SBO are discussed. © 2015 OSA.
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Материалы конференции
,
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,
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Доп.точки доступа:
Александровский, Александр Сергеевич; Conference on Lasers and Electro-Optics(2015 ; May ; 10-15 ; San Jose, California, US)
}
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5.
Aleksandrovsky, A. S.
Random quasi-phase-matching and nonlinear
diffraction
in nonlinear photonic crystal structures of strontium tetraborate : conference paper / A. S. Aleksandrovsky, A. M. Vyunishev, A. I. Zaitsev> // Ultrafast optics conference. - Davos, 2013. - Ст. Fr2.3
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр Иванович; Александровский, Александр Сергеевич; Ultrafast optics conference (9 ; 2013 ; March; 2-8 ; Davos Congr. Center, Switzerland)
}
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6.
Altunin, R. R.
Effect of the structural properties on the electrical resistivity of the Al/Ag thin films during the solid-state reaction / R. R. Altunin, E. T. Moiseenko, S. M. Zharkov> // Phys. Solid State. - 2020. -
Vol. 62
,
Is. 4
. - P. 708-713,
DOI
10.1134/S1063783420040034. - Cited References: 43. - This study was supported by the Russian Science Foundation, project no. 18-13-00080. . - ISSN 1063-7834. - ISSN 1090-6460
РУБ
Physics, Condensed Matter
Рубрики:
LIGHT-EMITTING-DIODES
PHASE-FORMATION
AG
AL
DIFFUSION
SUPPRESSION
INTERFACE
SURFACE
GROWTH
HEAT
Кл.слова (ненормированные):
thin films
--
phase formation
--
Al/Ag
--
solid-state reaction;
--
electron
diffraction
--
resistivity
Аннотация:
Based on the results of in situ electron
diffraction
study of the solid-state reaction and electrical resistivity measurements on the Al/Ag thin films with an atomic ratio of Al : Ag = 1 : 3, the temperature of the reaction onset has been established and a model of the structural phase transitions has been proposed. The solid-state reaction begins at 70°C with the formation of the Al–Ag solid solution at the interface between the aluminum and silver nanolayers. It has been found that, in the course of the reaction, the intermetallic compounds γ-Ag2Al → μ-Ag3Al are successively formed. It is shown that the possibility of the formation of the μ‑Ag3Al phase during the solid-state reaction in the Al/Ag thin films depends on the aluminum-to-silver ratio, while the formation of the μ-Ag3Al phase begins only after all fcc aluminum has reacted.
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Публикация на русском языке
Алтунин Р. Р. Влияние структурных свойств на электросопротивление тонких пленок Al/Ag в процессе твердофазной реакции [Текст] / Р. Р. Алтунин, Е. Т. Моисеенко, С. М. Жарков // Физ. тверд. тела. - 2020. - Т. 62 Вып. 4. - С. 621-626
Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Moiseenko, E. T.; Zharkov, S. M.; Жарков, Сергей Михайлович; Russian Science FoundationRussian Science Foundation (RSF) [18-13-00080]
}
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7.
Altunin, R. R.
Kinetics of diffusion and phase formation in a solid-state reaction in Al/Au thin films / R. R. Altunin, E. T. Moiseenko, S. M. Zharkov> // J. Alloys Compd. - 2024. -
Vol. 1002
. - Ст. 175500,
DOI
10.1016/j.jallcom.2024.175500. - Cited References: 83. - This work was supported by the Russian Science Foundation (grant # 22-13-00313) . - ISSN 0925-8388. - ISSN 1873-4669
Кл.слова (ненормированные):
Thin films
--
Solid-state reaction
--
Al-Au intermetallic compounds
--
In situ electron
diffraction
--
Phase transformation
--
Kinetics
Аннотация:
The kinetics of diffusion and formation of Al-Au intermetallic compounds in a solid-state reaction between layers of aluminum and gold has been studied by the method of in situ electron
diffraction
. The phase sequence in the solid-state reaction in Al/Au thin films is found to depend on the atomic ratio of aluminum and gold at the initial state. Specifically, with the atomic ratio being Al:Au=2:1, one observes the formation sequence: Al3Au8→AlAu2→Al2Au, while with the ratio Al:Au=1:4, the sequence is Al3Au8→AlAu4. The observed change in the sequence is explained using the theoretical model of EHF (Effective Heat of Formation). The kinetic parameters of the diffusion of gold through the layer of reaction products in the Al/Au thin films have been determined, including the apparent activation energy of the diffusion Ea=1.17 eV and pre-exponential factor D0=120 cm2/s. Based on the data obtained by in situ electron
diffraction
, the kinetic parameters of the phase formation have been estimated by the Kissinger-Akahira-Sunose method. In addition, the kinetic parameters of the formation of the Al-Au intermetallic compounds have been determined (apparent activation energy Ea, pre-exponential factor A) in the solid-state reaction in the Al/Au thin films, namely, Ea = 0.77 eV, log(A, s−1) = 9 for Al3Au8; Ea = 1.08 eV, log(A, s−1) = 13 for AlAu2; Ea = 1.13 eV, log(A, s−1) = 13 for Al2Au; and Ea = 1.35 eV, log(A, s−1) = 16 for the phase AlAu4. The kinetic parameters of the formation of the AlAu4 phase have been estimated for the first time.
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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Moiseenko, E. T.; Zharkov, S. M.; Жарков, Сергей Михайлович
}
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8.
Altunin, R. R.
Structural phase transformations during a solid-state reaction in a bilayer Al/Fe thin-film nanosystem / R. R. Altunin, E. T. Moiseenko, S. M. Zharkov> // Phys. Solid State. - 2020. -
Vol. 62
,
Is. 1
. - P. 200-205,
DOI
10.1134/S1063783420010059. - Cited References: 36. - This study was supported by the Russian Foundation for Basic Research, project no. 18-03-01173a . - ISSN 1063-7834
Кл.слова (ненормированные):
thin films
--
Al/Fe
--
solid-state reaction
--
phase formation
--
electron
diffraction
Аннотация:
The processes of phase formation during a solid-state reaction between Fe and Al nanolayers have been investigated by the in situ electron
diffraction
method. It is established that the solid-state reaction at the interface between iron and aluminum nanolayers begins at ≈100°C with the formation of a disordered Al solid solution in α-Fe. It is shown that intermetallic phases (FeAl6 and/or Fe2Al5, FeAl, and Fe3Al) are successively formed upon further heating.
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Публикация на русском языке
Алтунин Р. Р. Структурные фазовые превращения при твердофазной реакции в двухслойной тонкопленочной наносистеме Al/Fe [Текст] / Р. Р. Алтунин, Е. Т. Моисеенко, С. М. Жарков // Физ. тверд. тела. - 2020. - Т. 62 Вып. 1. - С. 158-163
Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Moiseenko, E. T.; Zharkov, S. M.; Жарков, Сергей Михайлович
}
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9.
Anharmonic thermal atomic
vibrations in the cubic phase of Cs//2NaNdCl//6 single crystals. / I. P. Makarova [et al.]> // Phys Status Solidi B. - 1984. -
Vol. 121
,
Is. 2
. - P. 481-486 . - ISSN 0370-1972
Кл.слова (ненормированные):
CRYSTALS
--
X-RAYS -
Diffraction
--
ANHARMONIC THERMAL ATOMIC VIBRATIONS
--
CUBIC PHASE
--
PHASE TRANSITIONS
--
CESIUM COMPOUNDS
Аннотация:
Thermal atomic vibrations in the cubic phase of Cs//2NaNdCl//6 single crystal undergoing the structural phase transition (PT) at 138 K are investigated from the data of X-ray
diffraction
obtained at 278, 218, and 148 K. A significant anisotropy of thermal vibrations and their deviations from harmonic behavior are found for the Cl-atoms of the structure. These atoms displace from their equilibrium positions below PT due to the tilts of the octahedral groups.
Scopus
Держатели документа:
Acad of Sciences of the USSR, A. V., Shubnikov Inst of Crystallography,, Moscow, USSR, Acad of Sciences of the USSR, A. V. Shubnikov Inst of Crystallography, Moscow, USSR
Доп.точки доступа:
Makarova, I. P.; Misyul, S. V.; Мисюль, Сергей Валентинович; Muradyan, L. A.; Bovina, A. F.; Бовина, Ася Федоровна; Simonov, V. I.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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10.
Anomalous light
diffraction
by cholesterics encapsulated in films / V. F. Shabanov, S. Ya. Vetrov, G. M. Zharkova, V. M. Khachaturyan> // Journal of Molecular Electronics. - 1990. -
Vol. 6
,
Is. 3
. - P. 141-144
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Доп.точки доступа:
Shabanov, V. F.; Шабанов, Василий Филиппович; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Zharkova, G. M.; Khachaturyan, V. M.
}
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11.
Aplesnin, S. S.
Effect of bond fluctuations on the transport properties of manganites and nickelates / S. S. Aplesnin> // J. Exp. Theor. Phys. - 2007. -
Vol. 104
,
Is. 5
. - P. 766-774,
DOI
10.1134/S1063776107050111. - Cited References: 26 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
NEUTRON-
DIFFRACTION
CHARGE DISPROPORTIONATION
ELECTRONIC-STRUCTURE
MAGNETIC ORDER
TRANSITIONS
PEROVSKITES
PRNIO3
GAP
Кл.слова (ненормированные):
Crystal structure
--
Manganites
--
Optimization
--
Thermal conductivity
--
Thermal effects
--
Bond fluctuations
--
Nickelates
--
Orthorhombic crystal structure
--
Nickel compounds
Аннотация:
For the manganites RMnO(3) (R = La, Pr, Nd), a mechanism is proposed to explain the anomalous temperature dependences of the kinetic coefficients, resistivity, and thermoelectric power during the transition from the pseudocubic O to the orthorhombic O' crystal structure. The contributions of the bending and stretching modes of the octahedron to the formation of thermal-conductivity maxima and to the deviation from the linear dependence of ln(rho/T) on 1/T at low temperatures have been estimated. In nickelates, the metal-insulator transition is caused by lattice-polaron pinning by the stretching mode of the octahedron, and the low-temperature anomaly of the thermal conductivity is related to electron scattering by the bending mode of the octahedron.
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Публикация на русском языке
Аплеснин, Сергей Степанович. Роль флуктуации связей на транспортные свойства в магнганитах и никелатах [Текст] / С. С. Аплеснин // Журн. эксперим. и теор. физ. - 2007. - Т. 131 № 5. - С. 878-888
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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12.
Arkhipkin, V. G.
Diffraction
of a Laguerre-Gaussian beam in Raman interaction with a spatially periodic pump field / V. G. Arkhipkin, D. A. Ikonnikov, S. A. Myslivets> // Phys. Rev. A. - 2023. -
Vol. 107
,
Is. 2
. - Ст. 023519,
DOI
10.1103/PhysRevA.107.023519. - Cited References: 35. - This work was supported by the Russian Science Foundation (Grant No. 19-12-00203) . - ISSN 2469-9926. - ISSN 2469-9934
Аннотация:
We studied Fresnel
diffraction
of a Laguerre-Gaussian beam LGp,l with arbitrary azimuthal l and radial p indices on a grating induced during its Raman interaction with a spatially periodic pump field in an atomic medium. The
diffraction
pattern turned out to be more complex than the classical Talbot effect observed when a plane wave illuminates a two-dimensional grating. The simulation results show that, under certain conditions, at distances corresponding to the classical Talbot planes (integer and fractional), periodic amplitude-phase distributions appear. The
diffraction
patterns are not a probe-field image in the induced grating plane, but a regular array of vortex annular-shaped microbeams with an inhomogeneous intensity distribution depending on the l and p indices and with a topological charge equal to that of the initial probe beam. The intensity and spatial distribution of
diffraction
patterns can be controlled by Raman amplification in the induced grating by varying the pump-field intensity or the Raman detuning.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Department of Photonics and Laser Technology, Siberian Federal University, 660041 Krasnoyarsk, Russia
Доп.точки доступа:
Ikonnikov, D. A.; Иконников, Денис Андреевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
}
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13.
Arkhipkin, V. G.
Diffraction
of vortex Gaussian beams from a two-dimensional Raman-induced grating / V. G. Arkhipkin, S. A. Myslivets> // Laser Phys. - 2021. -
Vol. 31
,
Is. 6
. - Ст. 065401,
DOI
10.1088/1555-6611/abf567. - Cited References: 41 . - ISSN 1054-660X. - ISSN 1555-6611
РУБ
Optics + Physics, Applied
Кл.слова (ненормированные):
diffraction
--
Raman gain
--
Talbot effect
--
optical vortex beam
Аннотация:
In this paper, we study
diffraction
of a vortex Gaussian probe beam on a two-dimensional (2D) Raman-induced
diffraction
grating. Both near- and far-field
diffraction
of a vortex beam is considered. In the near field, quasi-Talbot images occur at specific distances from the grating, which corresponds to the classical Talbot length.
Diffraction
patterns in the Talbot planes are a periodic 2D array of ring-like vortex beamlets with topological charges (TCs) equal to the illuminating probe beam's charge. The lateral (off-axis) beamlets consist of several overlapping vortices with the TCs l = 1 and l =-1, and their centers (singular points) are offset relative to each other. It is shown that in the near field the TC is conserved, and the total
diffraction
field represents a single (global) vortex with an effective TC equal to the charge of the vortex probe beam. In the far field,
diffraction
patterns are also a 2D array of ring-like local vortices with a period depending on the z coordinate. Their TCs are equal to the charge of the probe field. It is shown that in a far field, the diffracted field's total TC is also equal to that of the probe field. We demonstrate that by choosing the pump field parameters, one can effectively control the intensity of
diffraction
orders.
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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660041, Russia.
Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
}
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14.
Arkhipkin, V. G.
One- and two-dimensional Raman-induced
diffraction
gratings in atomic media / V. G. Arkhipkin, S. A. Myslivets> // Phys. Rev. A. - 2018. -
Vol. 98
,
Is. 1
. - Ст. 013838,
DOI
10.1103/PhysRevA.98.013838. - Cited References: 37 . - ISSN 2469-9926. - ISSN 2469-9934
РУБ
Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
COLD ATOMS
ABSORPTION
Аннотация:
We propose and analyze an efficient scheme for the one- and two-dimensional atomic gratings based on periodic spatial modulation of the Raman gain and dispersion, which we name the Raman-induced
diffraction
gratings (RIDGs). There are fundamentally different from those based on electromagnetically induced transparency. As the probe field propagates along the direction normal to the standing pump wave, it can be effectively diffracted into high-order directions. The grating is a hybrid grating, i.e. it represents a mixture of amplitude and phase gratings. We identify the conditions when all high-order diffractions are amplified. In addition, we also show that
diffraction
of a probe field could be dynamically controlled using an additional laser field. With its help, it is possible to suppress or amplify
diffraction
beams. The RIDGs can be considered as all-optical multibeam splitters with amplification.
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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
}
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15.
Arkhipkin, V. G.
The Talbot effect under selective reflection from a Raman induced grating / V. G. Arkhipkin, S. A. Myslivets> // J. Sib. Fed. Univ. Math. Phys. - 2022. -
Vol. 15
,
Is. 6
. - P. 687-698 ; Журн. СФУ. Матем. и физика,
DOI
10.17516/1997-1397-2022-15-6-687-698. - Cited References: 33. - This work was partially (results for 1D gratings) supported by the Russian Science Foundation (RSF) through Grant 19-12-00203 . - ISSN 1997-1397. - ISSN 2313-6022
Перевод заглавия:
Эффект Тальбота при селективном отражении от рамановски индуцированной решетки
Кл.слова (ненормированные):
Raman gain
--
Fresnel
diffraction
--
Talbot effect
--
selective reflection
--
рамановское усиление
--
дифракция Френеля
--
эффект Тальбота
--
селективное отражение
Аннотация:
In the present work, we study the Talbot effect under selective reflection of probe radiation at the interface between a dielectric and a layer of resonant atoms, in which a Raman grating is induced. Under such conditions, the interface can operate as a reflective
diffraction
grating. The cases of one- and two-dimensional gratings are considered. It is shown that the reflection coefficient, with the account of the selectively reflected wave, can be both greater or smaller than the usual Fresnel reflection coefficient. The Talbot effect can be observed for a selectively reflected wave in the near-field
diffraction
region. The spatial structure of the
diffraction
patterns essentially depends on the pump field intensity and the Raman detuning.
В работе исследуется эффект Тальбота при селективном отражении пробного излучения на границе раздела диэлектрик — слой резонансных атомов, в котором индуцируется рамановская решетка. В таких условиях интерфейс может выступать как отражательная дифракционная решетка. Рассмотрены случаи одномерных и двумерных решеток. Показано, что коэффициент отражения с учетом селективно отраженной волны может быть как больше, так и меньше обычного коэффициента отражения Френеля. Эффект Тальбота можно наблюдать для селективно отраженной волны в ближней дифракционной области. Пространственная структура дифракционных картин существенно зависит от напряженности поля накачки и рамановской отстройки.
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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
Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
}
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16.
Arrangement of Rh3+
ions in fac-triamminetrichloridorhodium from powder data and in fac-triamminetrinitratorhodium crystals twinned by merohedry / A. D. Vasiliev [et al.]> // Acta Crystallogr. C. - 2013. -
Vol. 69
,
Pt. 12
. - P. 1462–1466 ; Spec. is. Interplay of crystallogr., spectrosc. and theor. meth. for solving chem. prob.,
DOI
10.1107/S010827011303076X . - ISSN 0108-2701
Перевод заглавия:
Расположение ионов Rh3+ в гран-триамминтрихлоридродии из порошковых данных и в мероэдрически двойникованном кристалле гран-триамминтринитрародия
Кл.слова (ненормированные):
crystal structure
--
powder
diffraction
--
merohedral twinning
--
fac-triamminetrichloridorhodium
--
low solubility
--
fac-triamminetrinitratorhodium
Аннотация:
The rhodium complexes [RhCl3(NH3)3], (I), and [Rh(NO3)3(NH3)3], (II), are built from octahedral RhX3(NH3)3 units; in (I) they are isolated units, while in (II) the units are stacked in columns with partially filled sites for the Rh atoms. The octahedra of monoclinic crystals of (I) are linked by N-H...Cl hydrogen bonds and the Rh3+ ions are located on the mirror planes. In the trigonal crystals of (II), the discontinuous `columns` along the threefold axis are linked by N-H...O hydrogen bonds. The structure of (I) has been solved using laboratory powder
diffraction
data, the structure of (II) has been solved by single-crystal methods using data from a merohedrally twinned sample. Both compounds possess low solubility in water.
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Держатели документа:
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Nikolaev Inst Inorgan Chem SB RAS, Novosibirsk 630090, Russia
Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Baidina, I. A.; Belyaev, A. V.; Vorob`eva, S. N.
}
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17.
Astakhov, A. M.
Crystal and molecular structure of 1-phenyl-2-nitroguanidine / A. M. Astakhov, A. D. Vasiliev, V. A. Revenko> // J. Struct. Chem. - 2012. -
Vol. 53
,
Is. 5
. - P. 1013-1016,
DOI
10.1134/S0022476612050265. - Cited References: 12 . - ISSN 0022-4766
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Кл.слова (ненормированные):
nitrimines
--
nitroguanidine
--
single crystal X-ray
diffraction
study
--
molecular structure
Аннотация:
The molecular structure of 1-phenyl-2-nitroguanidine is nonplanar, but contains two almost planar fragments: nitroguanyl and phenyl groups. Unlike previously studied nitroguanidines, in 1-phenyl-2-nitroguanidine, the nitro group is turned to the secondary amino group. However, the structural parameters of the nitroguanyl group are little different from those of nitroguanidine and its alkyl derivatives. In the benzene ring, the symmetry in the geometric parameters is not observed, which is explained by the intermolecular interaction with the neighboring molecule.
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Публикация на русском языке
Астахов А. М. Кристаллическая и молекулярная структура 1-фенил-2-нитрогуанидина [Текст] / А. М. Астахов, А. Д. Васильев, В. А. Ревенко // Журн. структ. химии. - 2012. - Т. 53 № 5. - С. 1031-1034
Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Revenko, V. A.; Ревенко В.А.
}
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18.
Belyaev, B. A.
Diffraction
of electromagnetic waves on a one-dimensional strip conductor grating located at the interface between dielectric media / A. Belyaev, V. V. Tyurnev> // Russ. Phys. J. - 2015. -
Vol. 58
,
Is. 5
. - P. 646-657,
DOI
10.1007/s11182-015-0546-1. - Cited References:17. - This work was supported in part by the Ministry of Education and Science of the Russian Federation (Agreement No. 14.607.21.0039). . - ISSN 1064-8887. - ISSN 1573-9228
РУБ
Physics, Multidisciplinary
Рубрики:
TRANSMISSION COEFFICIENTS
MULTILAYER STRUCTURE
BANDPASS-FILTERS
REFLECTION
Кл.слова (ненормированные):
electromagnetic waves
--
dielectric layers
--
strip conductors
--
diffraction
Аннотация:
Analytical formulas are derived for the transmission and reflection coefficients of electromagnetic E- and H-waves incident at an arbitrary angle on a one-dimensional strip conductor grating located at the interface between two dielectric media. The feasibility of adjusting the grating reflectivity within wide limits by varying its design parameters is demonstrated, which allows these structures to be used in multilayered dielectric bandpass filters.
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Публикация на русском языке
Беляев, Борис Афанасьевич. Дифракция электромагнитных волн на одномерной решетке полосковых проводников, расположенной на границе раздела диэлектрических сред [Текст] / Б. А. Беляев, В. В. Тюрнев // Изв. вузов. Физика : Томский государственный университет, 2015. - Т. 58 № 5. - С. 57-66
Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia.
Доп.точки доступа:
Tyurnev, V. V.; Тюрнев, Владимир Вениаминович; Беляев, Борис Афанасьевич; Ministry of Education and Science of the Russian Federation [14.607.21.0039]
}
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19.
Bi2(Sn0.95Cr0.05)2O7: Structure, IR
spectra, and dielectric properties / S. S. Aplesnin [et al.]> // Ceram. Int. - 2016. -
Vol. 42
,
Is. 4
. - P. 5177-5183,
DOI
10.1016/j.ceramint.2015.12.040. - Cited References: 45. - This work was supported by the Russian Foundation for Basic Research Projects no. 15-42-04099 r_siberia_a, Siberian Branch of Science and NAS of Belarus “Electronic and magnetic phase transitions in materials with magnetoelectric affect” and government work no. 114090470016. . - ISSN 0272-8842
РУБ
Materials Science, Ceramics
Рубрики:
BISMUTH PYROSTANNATE
PYROCHLORE STRUCTURE
MAGNETIC-PROPERTIES
PARTIAL OXIDATION
HIGH-TEMPERATURE
X-RAY
Bi2Sn2O7
SUBSTITUTION
CATALYSTS
DIFFRACTION
Кл.слова (ненормированные):
Bismuth pyrostannate
--
Infrared absorption spectra
--
Structural transition
--
Permittivity
--
Debye model
Аннотация:
Infrared absorption spectra of the bismuth pyrostannate Bi2(Sn0.95Cr0.05)2O7 were investigated in the frequency range 350-1100 cm-1 at temperatures of 110-525 K. Four frequency regions with split absorption lines are distinguished. Softening of frequencies at the structural transitions was observed. The maxima of permittivity measured in the frequency range 1-200 kHz at temperatures 100-400 K were determined. It was found that the magnetic susceptibility changes its sign in the low-temperature region. The correlation between anomalies in the magnetic susceptibility, permittivity, and absorption line intensity was established. Softening of frequencies is explained by the variation in the coefficient of thermal expansion of the lattice. The temperature behavior of permittivity is described using the Debye model. © 2015 Elsevier Ltd and Techna Group S.r.l.
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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Shestakov, N. P.; Шестаков, Николай Петрович
}
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20.
Bis(μ3-barbiturato−O,O,O′)-(μ2-aqua)- aqua-barium(II): crystal
structure, spectroscopic and thermal properties / L. A. Solovyov [et al.]> // J. Coord. Chem. - 2017. -
Vol. 70
,
Is. 12
. - P. 1984-1993,
DOI
10.1080/00958972.2017.1319943. - Cited References: 21 . - ISSN 0095-8972
Перевод заглавия:
Бис(μ3-барбитурат-O,O,O')-(μ2-аква)-аква-бария(II): Кристаллическая структура, спектроскопические и термические свойства
Кл.слова (ненормированные):
Barbituric acid
--
barium
--
coordination compound
--
X-ray
diffraction
--
infrared spectroscopy
--
thermal analysis
Аннотация:
A polymeric coordination compound, [Ba(H2O) 2(Hba)2] (1) (H2ba – barbituric acid, C4H4N2O3), was obtained. The structure of 1 was solved using powder X-ray
diffraction
methods. The Ba2+ ion in 1 formed a three-capped trigonal prism. The BaO9 polyhedra, connected with each other by the edges and faces, formed a chain. Several 4- and 12-membered cycles due to the bridging μ2-H2O and bridging μ3-Hba– also formed implementing a 3-D polymer structure. The structures of 1 and other thiobarbiturate complexes were compared. The replacement of a S atom by an O atom in the heterocyclic ligand Htba− (thiobarbiturate ion) of the compound Ba(H2O)2(Htba)2 resulted in changes of the coordination number Ba(II) and supramolecular structure. The intermolecular hydrogen bonds O–H⋯O and N–H⋯O formed a 3-D net where pronounced 2-D layers of Hba– ions could be found. A new topological net in 1 was observed. The IR and thermal stability were investigated.
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Держатели документа:
Institute of Chemistry and Chemical Technology, SB RAS, FRC “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Department of Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Доп.точки доступа:
Solovyov, L. A.; Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lesnikov, M. K.
}
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