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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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    Spin-glass magnetic ordering in CoMgGaO2BO3 ludwigite / N. B. Ivanova [et al.] // Физ. низких температур. - 2012. - Т. 38, Вып. 2. - С. 214-217. - Библиогр.: 13 назв. - This work was supported by the Russian Foundation for Basic Research (project No. 09-02-00171-a), the Federal Agency for Science and Innovation (Rosnauka) (project No. MK-5632.2010.2), the Physics Division of the Russian Academy of Sciences, the program "Strongly Correlated Electrons" (project 2.3.1). . - ISSN 0132-6414. - ISSN 1816-0328
   Перевод заглавия: Спин-стекольное магнитное упорядочение в людвигите CoMgGaO2BO3
Рубрики:
AC Magnetic susceptibility
   DC magnetization
   Field cooled
   Flux methods
   Frequency dependent
   Magnetic system
   Magnetic transitions
   Needle shape
   Parent compounds
   Spin-glasses freezing
   Temperature dependencies
   Unit-cell volume
   Zero-field-cooled
   Cobalt
   Cobalt compounds
   Freezing
   Glass
   Magnetic susceptibility
   Magnetism
   Single crystals
   X-ray diffraction
   Spin glass
Кл.слова (ненормированные):
Spin-glass freezing -- Transition metal ludwigites
Аннотация: The single crystal needle shape samples of diamagnetically diluted cobalt ludwigite CoMgGaO2BO3 have been grown by the flux method. The results of x-ray diffraction and both dc and ac magnetic measurements are presented. The unit cell volume undergoes a noticable growth under dilution from 328.31 Å3 for the parent compound Co3O2BO3 to 345.46 Å3 for CoMgGaO2BO3. The temperature of magnetic transition is considerably lower for the latter compound (25 K against 43 Kfor Co3O2BO3). The dc magnetization temperature dependencies undergo the splitting of field cooled and zero-field cooled regimes and the ac magnetic susceptibility temperature dependencies are frequency dependent pointing out a possible spin-glass freezing in the magnetic system.

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Переводная версия Spin-glass magnetic ordering in CoMgGaO2BO3 ludwigite [Текст] / N. B. Ivanova [et al.] // Low Temp. Phys. : American Institute of Physics, 2012. - Vol. 38 No. 2.- P.172-174

Доп.точки доступа:
Ivanova, N. B.; Иванова, Наталья Борисовна; Platunov, M. S.; Платунов, Михаил Сергеевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Kazak, N. V.; Казак, Наталья Валерьевна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Eremin, E. V.; Еремин, Евгений Владимирович; Vasiliev, A. D.; Васильев, Александр Дмитриевич
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Local structure of disordered PbSc1/2Nb1/2O3 in the region of the diffuse tetragonal phase-rhombohedral phase transition / I. P. Aleksandrova [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 2. - P. 316-323, DOI 10.1134/S1063783412020047. - Cited References: 16. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of the Leading Scientific Schools of the Russian Federation (grant no. NSh-4645.2010.2). . - ISSN 1063-7834

РУБ Physics + Condensed Matter
Рубрики:
Neutron-diffraction
   Order
   BaTiO3
   PbNiO3
   NMR
Аннотация: The local structure of the ferroelectric-relaxor PbSc1/2Nb1/2O3 in the temperature range from 550 to 220 K has been investigated using 45Sc nuclear magnetic resonance. It has been found that, in the paraelectric phase at temperatures below 550 K, the crystal consists of regions of an ordered elpasolite structure and inclusions of the disordered tetragonal perovskite phase with displacements along directions of the [001] type. The relative weight of the tetragonal structure in the region of the paraelectric phase is approximately equal to 0.28. Below the temperature of the phase transition from the disordered modification to the polar phase, the relative weight of the tetragonal phase decreases with decreasing temperature. The tetragonal structure is replaced by the trigonal polar structure. In a wide temperature range (∼50 K), there exists a heterophase structure that is characteristic of relaxors. Note that the correlation length of displacements in the tetragonal phase should be very small to explain the absence of indications of the existence of this phase in the diffraction data.

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Публикация на русском языке Локальная структура разупорядоченного PbSc[1/2]Nb[1/2]O[3] в области размытого перехода тетрагональная фаза - тригональная фаза [Текст] / И. П. Александрова [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 2. - С. 298-304

Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Sukhovsky, A. A.; Суховский, Андрей Андреевич; Ivanov, Y. N.; Иванов, Юрий Николаевич; Raevsky, I. P.; Раевский И.П.
}
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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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    Preparation and structural properties of nonlinear optical borates K 2(1-x)Rb 2xAl 2B 2O 7, 0 ˂ x ˂ 0.75 / V. V. Atuchin [и др.] // J. Alloys Compd. - 2012. - Vol. 515. - P. 119-122, DOI 10.1016/j.jallcom.2011.11.115. - Cited References: 30. - This study was supported by SB RAS (Grant 34) and RFBR Grants 11-02-90706-mob_st and 11-03-00867a. . - ISSN 0925-8388
   Перевод заглавия: Получение и структурные свойства нелинейных оптических боратов K 2(1-x)Rb 2xAl 2B 2O 7, 0 ˂ x ˂ 0.75

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering + Aluminum + Crystal structure + Nonlinear optics + Rietveld analysis + Rubidium + Solid solutions + Structural properties + X ray powder diffraction
Рубрики:
UV-light generation
   Frequence-conversion
   K2Al2B2O7 crystal
   Composition ratio
   Mixed-crystals
   Growth
   KRbAl2B2O7
   NLO properties
   Non-linear optical
   Non-linear optical properties
   Rietveld analysis of X-ray powder diffraction data
   Solubility limits
   Space Groups
   Structural parameter
Кл.слова (ненормированные):
KRbAl2B2O7 -- Solid solution -- Crystal structure -- NLO properties
Аннотация: The structures of K 2(1-x)Rb 2xAl 2B 2O 7, x = 0.25, 0.5, 0.75, have been determined in space group P321 through Rietveld analysis of X-ray powder diffraction data. The solubility limit in K 2(1-x)Rb 2xAl 2B 2O 7 crystals has been estimated as x similar to 0.83-0.9. Nonlinear optical properties of KRbAl 2B 2O 7 have been verified by powder Kurtz-Perry method. Mechanisms of structural parameter variation in K 2Al 2B 2O 7 crystal family have been discussed.

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Доп.точки доступа:
Atuchin, V. V.; Bazarov, B. G.; Gavrilova, T. A.; Grossman, V. G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bazarova, Zh. G.
}
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Čerenkov nonlinear diffraction of femtosecond pulses / A. M. Vyunishev [et al.] // ICONO/LAT 2013 : Advance conference program. - 2013. - Ст. ITU17. - P. 40

Материалы конференции

Доп.точки доступа:
Vyunishev, A. M.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zaitsev, A. I.; Зайцев, Александр Иванович; Slabko, V. V.; Слабко, Виталий Васильевич; International Conference on Coherent and Nonlinear Optics(2013 ; June ; 18-22 ; Moscow)
}
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Cerenkov nonlinear diffraction of femtosecond pulses in random nonlinear photonic crystal / A. M. Vyunishev [et al.] // Third Russia-Taiwan School-Seminar on Nonlinear Optics and Photonics : Program and Book of Abstracts. - 2013. - Ст. S1-11-O30. - P. 20

Доп.точки доступа:
Vyunishev, A. M.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zaitsev, A. I.; Зайцев, Александр Иванович; Slabko, V. V.; Слабко, Виталий Васильевич; Russia-Taiwan School-Seminar on Nonlinear Optics and Photonics (3 ; 2013 ; Jun. ; 14-18 ; Владимир / Суздаль)
}
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Contact-induced spin polarization in graphene/h-BN/Ni nanocomposites / P. V. Avramov [et al.] // J. Appl. Phys. - 2012. - Vol. 112, Is. 11. - Ст. 114303. - P. , DOI 10.1063/1.4767134. - Cited References: 47. - This work was supported by JAEA Research fellowship (P.V.A.). P.V.A. also acknowledges JAEA ASRC and Molecular Spintronics Group for hospitality and fruitful collaboration. The authors are grateful to the ICS SB RAS and SFU CC (Krasnoyarsk), ISC RAS and MSU CRC, (SKIF MSU "Chebyshev", Moscow) for computer resources. This work was partially supported by the RFBR grant 12-02-31417. . - ISSN 0021-8979

РУБ Physics, Applied + Boron nitride + Electronic structure + Nanocomposites + Plates (structural components) + Spin polarization + Graphene
Рубрики:
HEXAGONAL BORON-NITRIDE
   TRILAYER GRAPHENE
   NI(111) SURFACE
   GRAPHITE
   APPROXIMATION
   SPINTRONICS
   DIFFRACTION
   SIMULATION
   SUBSTRATE
   CARBON
Аннотация: Atomic and electronic structure of graphene/Ni(111), h-BN/Ni(111) and graphene/h-BN/Ni(111) nanocomposites with different numbers of graphene and h-BN layers and in different mutual arrangements of graphene/Ni and h-BN/Ni at the interfaces was studied using LDA/PBC/PW technique. Using the same technique corresponding graphene, h-BN and graphene/h-BN structures without the Ni plate were calculated for the sake of comparison. It was suggested that C-top:C-fcc and N-top:B-fcc configurations are energetically favorable for the graphene/Ni and h-BN/Ni interfaces, respectively. The Ni plate was found to induce a significant degree of spin polarization in graphene and h-BN through exchange interactions of the electronic states located on different fragments. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767134]

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Держатели документа:
[Avramov, Pavel V.
Sakai, Seiji
Ohtomo, Manabu
Entani, Shiro
Matsumoto, Yoshihiro
Naramoto, Hiroshi] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
[Avramov, Pavel V.
Kuzubov, A. A.
Eleseeva, Natalia S.] LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.; Sakai, Seiji; Ohtomo, Manabu; Entani, Shiro; Matsumoto, Yoshihiro; Naramoto, Hiroshi; Eleseeva, N. S.; Елисеева, Наталья Сергеевна
}
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    Cerenkov nonlinear diffraction of femtosecond pulses / A. M. Vyunishev [et al.] // J. Opt. Soc. Am. B. - 2013. - Vol. 30, Is. 7. - P. 2014-2021, DOI 10.1364/JOSAB.30.002014. - Cited References: 43. - The work was partially supported by the Grant of the President of the Russian Federation MK-250.2013.2, by RFBR through Grant No. 12-02-31167, by the Ministry of Education and Science of the Russian Federation (Contract No. 14.B37.21.0730), by Krasnoyarsk Regional Fund of Science and Technical Activity Support, by PSB RAS Project 2.5.2, and by SFU Grant F12. . - ISSN 0740-3224
   Перевод заглавия: Черенковская нелинейная дифракция фемтосекундных импульсов

РУБ Optics
Рубрики:
STRONTIUM BARIUM NIOBATE
   2ND-HARMONIC GENERATION
   PHOTONIC CRYSTAL
   DOMAIN-WALLS
   MODULATION
Аннотация: Cerenkov nonlinear diffraction of femtosecond pulses in one-dimensional nonlinear photonic crystal of strontium tetraborate was studied theoretically and experimentally in both frequency and time domains. Spectral features of second harmonic radiation were measured in the course of mapping the nonlinear photonic crystal structure. The local second harmonic spectrum demonstrates complex angular behavior within the beam cross section. The spectral width of the second harmonic radiation is found to be fundamental beam size-dependent, and optimal focusing should be used for exact conversion of the fundamental spectrum into the second harmonic one. Experimental results are in excellent agreement with calculations. Maximum second harmonic generation efficiency was up to 2.1% at pumping by a femtosecond oscillator. (C) 2013 Optical Society of America

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660079, Russia

Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zaitsev, A. I.; Зайцев, Александр Иванович; Slabko, V. V.; Слабко, Виталий Васильевич
}
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10.

    Synthesis and molecular structure of cobalt(II) complex with 1-(1-silatranylmethyl)-1,2,4-triazole / A. D. Vasiliev [et al.] // Struct. Chem. - 2013. - Vol. 24, Is. 4. - P. 1001-1005, DOI 10.1007/s11224-012-0121-0. - Cited References: 24 . - ISSN 1040-0400
   Перевод заглавия: Синтез и молекулярная структура комплекса кобальта(II) с 1-(1-силатранилметил)-1,2,4-триазолом

РУБ Chemistry, Multidisciplinary + Chemistry, Physical + Crystallography
Рубрики:
REACTIVITY
   DERIVATIVES
   CRYSTAL
   SPECTRA
Кл.слова (ненормированные):
Complexes -- 1-(1-Silatranylmethyl)-1,2,4-triazole -- Cobalt dichloride -- X-ray diffraction
Аннотация: Reaction of cobalt chloride with 1-(1-silatranylmethyl)-1,2,4-triazole in benzene afforded complex CoCl2 center dot 2L (L = 1-(1-silatranylmethyl)-1,2,4-triazole). It was isolated as the solvate [CoCl2 center dot 2L]center dot CH2Cl2 (1) by recrystallization from dichloromethane and structurally characterized by single-crystal X-ray diffraction. It crystallizes in the monoclinic space group P2(1)/m with a = 6.798(2) E, b = 20.326(5) E, c = 11.005(3) E, and Z = 4. The cobalt atom is in slightly distorted square-planar environment, coordinated to two nitrogen atoms from two ligands and two chloride ions.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
East Siberian State Academician Educ, Irkutsk 664011, Russia
Russian Acad Sci, Siberian Branch, AE Favorsky Irkutsk Inst Chem, Irkutsk 664033, Russia

Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Zel'bst, E. A.; Soldatenko, A. S.; Bolgova, Yu.I.; Trofimova, O. M.; Voronkov, M. G.
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11.

Redox potentials of gold-palladium powders in aqueous solutions of H2PdCl4 / O. V. Belousov [et al.] // Russ. J. Phys. Chem. A. - 2012. - Vol. 86, Is. 3. - P. 484-488, DOI 10.1134/S0036024412020070. - Cited References: 26 . - ISSN 0036-0244

РУБ Chemistry, Physical + Powders
Рубрики:
BIMETALLIC NANOPARTICLES
   METALLIC PALLADIUM
   COPPER
   ELECTRODE
   BLACK
   Bimetallic particles
   Bimetallic powders
   Gold-palladium
   Hydrochloric acid solution
   Nernst equation
   Redox potentials
   Gold
   Hydrochloric acid
   Redox reactions
   Secondary batteries
   Transmission electron microscopy
   X ray diffraction analysis
Кл.слова (ненормированные):
bimetallic powders -- gold-palladium -- redox potential
Аннотация: The redox potential of fine-dispersed and compact bimetallic powders of the palladium-gold system in hydrochloric acid solutions of H2PdCl4 at a temperature of 60A degrees C was studied. It was found that the redox potential increases with gold enrichment of the solid solution in accordance with the Nernst equation. The effect of gold-palladium particle size on this redox potential is shown. The morphology, sizes, and composition of bimetallic particles are determined via transmission electron microscopy and X-ray diffraction analysis.

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Публикация на русском языке Окислительно-востановительные потенциалы золото-палладиевых порошков в водных растворах H2PdCl4 [Текст] / О. В. Белоусов [и др.] // Журн. физ. химии : Наука, 2012. - Т. 86 № 3. - С. 557-562

Держатели документа:
[Belousov, O. V.
Borisov, R. V.
Parfenov, V. A.
Dorokhova, L. I.] Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660041, Russia
[Zharkov, S. M.] Russian Acad Sci, Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Zharkov, S. M.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Belousov, O. V.; Borisov, R. V.; Zharkov, S. M.; Жарков, Сергей Михайлович; Parfenov, V. A.; Dorokhova, L. I.
}
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12.

Vasiliev, A. D.
Crystal structure of hexakis(thiourea)-bis((μ-perchlorato-O,O')- (perchlorato-O)-bismuth) diperchlorate / A. D. Vasiliev, N. N. Golovnev // Russ. J. Coordin. Chem. - 2013. - Vol. 39, Is. 2. - P. 161-164, DOI 10.1134/S1070328413020097 . - ISSN 1070-3284
Кл.слова (ненормированные):
Crystallographic data -- Hydrogen atoms -- Hydrogen bond networks -- IR and Raman spectroscopy -- Space Groups -- Sulfur atoms -- Atoms -- Complex networks -- Hydrogen bonds -- Raman spectroscopy -- Single crystals -- X ray diffraction -- Thioureas
Аннотация: The complex[Bi2(Tu)6(ClO4) 4](ClO4)2 (I) (Tu is thiourea) was synthesized and studied by X-ray diffraction. The crystallographic data of I are: a = 14.205(1) A, b = 13.083(1) A, c = 22.078(2) A, ? = 96.182(1), V = 4079.1(7) A3, space group C2/c, Z = 4. The molecule is located on a twofold axis and consists of the binuclear cation [Bi2(Tu)6(ClO4)4]2+ and two outer-sphere anions Cl 4 -. The Bi-S bond lengths are 2.61-2.62 A. For each terminal and bridging ClO 4 - ion, one Bi-O distance varies from 2.744 to 3.048 3.269 structure contains a hydrogen bond network involving all hydrogen atoms. The IR and Raman spectroscopy data confirm the thiourea coordination by the sulfur atom. В© 2013 Pleiades Publishing, Ltd.

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Публикация на русском языке Васильев, Александр Дмитриевич. Кристаллическая структура диперхлората гексакис(тиомоче-вина)-бис((μ-перхлорато-О,О′)-(перхлрато-О)-висмута) [Текст] / А. Д. Васильев, Н. Н. Головнёв // Координ. химия. - 2013. - Т. 39 № 2. - С. 71-74

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Golovnev, N. N.; Головнёв, Николай Николаевич; Васильев, Александр Дмитриевич
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13.

    Синтез, структура, ЭПР спектры и теплоемкость кубического оксифторида CsZnMoO3F3 / М. С. Молокеев [и др.] // Вестник СибГАУ. - 2013. - № 3. - С. 224-227. - Работа выполнена при финансовой поддержке ФЦП «Научные и научно-педагогические кадры инновационной России» на 2009–2013 гг., № 8379
   Перевод заглавия: Synthesis, structure, epr spectra and heat capacity of cubic CsZnMoO3F3 oxyfluoride
Кл.слова (ненормированные):
оксифторид -- рентгеноструктурный анализ -- ЭПР спектры -- теплоемкость -- oxyfluoride -- X-ray powder diffraction -- EPR -- heat capacity
Аннотация: Оксифторид CsZnMoO3F3 получен методом твердофазного синтеза. Установлено, что кристалл изоструктурен пирохлору и уточнена его кристаллическая структура при T = 298 K методом Ритвельда. Несмотря на то, что основным структурным элементом в этом соединении является искаженный полиэдр, реализовалась кубическая фаза. Стабильность кубической фазы подтверждена исследованием теплоемкости в температурном интервале T = 110–293 K. Проанализированы ЭПР спектры исследуемого соединения в диапазоне температур T = 77–295 K. Установлено наличие дефектов в структуре. Проведено сравнение исследуемого соединения с родственным оксифторидом CsMnMoO3F3. Отмечено лишь небольшое изменение тепловых параметров и параметров ячеек.
Oxyfluoride CsZnMoO3F3 has been prepared with the solid state synthesis. It was found that crystal is isostructural to pyrochlore and its crystal structure was defined with the Rietveld method more exactly. Despite the fact that the main structural element in this compound is distorted polyhedron, the cubic phase has been realized. The stability of the cubic phase over the temperature range T = 110–293 K was proved by the heat capacity measurement. The EPR spectra were analyzed over the range of 77–295 K. The presence of defects was revealed. The comparison between compound under investigation and CsMnMoO3F3 was implemented. Just a tiny change of the thermal parameters and the cell parameters was registered.

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

Доп.точки доступа:
Молокеев, Максим Сергеевич; Molokeev, M.S.; Петраковская, Элеонора Анатольевна; Petrakovskaya, E.A.; Бондарев, Виталий Сергеевич; Bondarev, V. S.; Колесникова, Евгения Михайловна; Kolesnikova, E. M.; Иванов, Н. А.
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14.

    In situ transmission electron microscopy and electron diffraction investigation of solid-state reactions and atomic ordering in Cu/Au bilayer nanofilms / S. M. Zharkov [et al.] // J. Sib. Fed. Univ. Chem. - 2013. - Vol. 6, Is. 3. - P. 230-240 ; Журн. СФУ. Сер. "Химия"
   Перевод заглавия: In situ-исследования твердофазных реакций и атомного упорядочения в двухслойных нанопленках Cu/Au методами просвечивающей электронной микроскопии и дифракции электронов
Кл.слова (ненормированные):
Cu/Au nanofilm -- Intermetallics -- Solid state reaction -- Phase transition -- Atomic ordering -- Superstructure -- нанопленка Cu/Au -- интерметаллиды -- твердофазная реакция -- фазовый переход -- атомное упорядочение -- сверхструктура
Аннотация: Solid-state reaction processes and atomic ordering in Cu/Au bilayer nanofilms (with the atomic ratio Cu:Au≈50:50) have been studied in situ by the methods of transmission electron microscopy and electron diffraction in the process of heating from room temperature up to 700 ºС at a heating rate of 4-8 ºС/min. The solid-state reaction between the nanolayers of copper and gold has been established to begin at 180 ºС. The process of atomic ordering has been shown to start simultaneously with the process of the formation of the disordered phase of Cu50Au50 at 245 ºС. The formation processes of the ordered phases of: CuAuI (L10 superstructure) and CuAuII (long period superstructure) have been studied, as well as the phase transition processes: disorder - order (the transition of the disordered structure into the ordered one) and order - disorder (the transition of the ordered structure into the disordered one).
Методами просвечивающей электронной микроскопии и дифракции электронов проведены in situ-исследования процессов твердофазных реакций и атомного упорядочения в двухслойных нанопленках Cu/Au (с атомным соотношением Cu:Au≈50:50) при нагреве от комнатной температуры до 700 ºС при скорости нагрева 4-8 ºС/мин. Установлено, что твердофазная реакция между нанослоями меди и золота начинается при 180 ºС. Показано, что процесс атомного упорядочения начинается одновременно с процессом формирования неупорядоченной фазы Cu50Au50 при 245 ºС. Исследованы процессы формирования атомно-упорядоченных фаз: CuAuI (L10 сверхструктура) и CuAuII (длинно-периодическая сверхструктура), а также процессы фазовых переходов беспорядок-порядок (переход неупорядоченной структуры в атомно-упорядоченную) и порядок-беспорядок (переход атомно-упорядоченной структуры в неупорядоченную)

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Доп.точки доступа:
Zharkov, S. M.; Жарков, Сергей Михайлович; Moiseenko, E. T.; Моисеенко, Евгений Тимофеевич; Altunin, R. R.; Алтунин, Роман Русланович; Zeer, G. M.

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15.

    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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16.

Experimental study of the structure of milled diamond-containing particles obtained by the detonation method / A. Korets [et al.] // EPJ Appl. Phys. - 2012. - Vol. 57, Is. 3. - Ст. 30701, DOI 10.1051/epjap/2012110208. - Cited References: 15 . - ISSN 1286-0042

РУБ Physics, Applied
Рубрики:
PURIFICATION
NANODIAMOND
Кл.слова (ненормированные):
Chemical change -- Diamond grains -- Experimental spectra -- Experimental studies -- IR spectrum -- Mechanical force -- Detonation -- Diamonds -- X ray diffraction -- Agglomeration
Аннотация: A diamond-containing material (DCM) produced by detonation was mechanically milled using KM-1 and AGO-2S mills. Experimental spectra for infrared (IR) absorption, Raman scattering and X-ray diffraction patterns (XRD) were obtained for the treated DCM samples. We compared the Raman and IR spectra for the KM-1 milled samples and concluded that the surface of the DCM particles was not uniform. The mechanical force that resulted from milling with the AGO-2S destroyed the non-diamond part of the particles and initiated irreversible physical and chemical changes in them. The destruction of the diamond grains was the consequence of these irreversible changes. It follows from the experiments that the dipole momentum of the DCM particle was caused by the presence of polar fragments of molecules. The constant dipole momentum of the particles facilitated the aggregation. Based on this, we proposed a model of a structurally inhomogeneous DCM particle. В© 2012 EDP Sciences.

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Держатели документа:
Siberian Federal University, 26, Kirensky Str., Krasnoyarsk 660074, Russian Federation
Institute of Physics, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Institute of Chemistry and Chemical Technology, KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Korets, A.; Krylov, A. S.; Крылов, Александр Сергеевич; Mironov, E.; Rabchevskii, E.
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17.

Magnetic structure of iron borate DyFe3(BO3)4: A neutron diffraction study / C. Ritter [et al.] // J. Phys.: Conf. Ser. - 2012. - Vol. 340. - Ст. 012065, DOI 10.1088/1742-6596/340/1/012065. - Cited References: 22 . - ISSN 1742-6588

РУБ Physics, Condensed Matter + Physics, Particles & Fields

Кл.слова (ненормированные):
Antiferromagnetics -- Crystallographic structure -- Easy-axis anisotropy -- Iron borate -- Kramers doublet -- Low temperatures -- Magnetic propagation -- Neutron diffraction measurements -- Repopulation -- Room temperature -- Spin reorientation -- Sub-lattices -- Thermal dependences -- Unit cells
Аннотация: Neutron diffraction measurements were performed on the iron borate DyFe3(BO3)4 to investigate details of the crystallographic structure, the low temperature magnetic structure and its magnetic properties. DyFe3(BO3)4 adopts at room temperature the P3121 symmetry and becomes antiferromagnetic below TN = 39 K. Both, the rare earth and the iron sublattice, follow the same magnetic propagation vector τ = [0, 0, ½] which leads to a doubling of the crystallographic unit cell in the c-direction. The easy axis anisotropy of the rare earth determines the moment orientation to be mainly along c. No spin reorientation is found between TN and 1.5 K, however, a small anomaly in the thermal dependence of the unit cell a-parameter is found at about 27 K which could be connected to repopulation of low lying Kramers doublets of Dy3+. The magnetic moment value of the Fe-moment is at 1.5 K with μFe = 4.5 μB only slightly smaller than expected for an S = 5/2 ion while the Dy moment is strongly reduced and amounts only to μDy = 6.4 μB.

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Доп.точки доступа:
Ritter, C.; Pankrats, A. I.; Панкрац, Анатолий Иванович; Gudim, I. A.; Гудим, Ирина Анатольевна; Vorotynov, A. M.; Воротынов, Александр Михайлович; European Conference on Neutron Scattering(5 ; 2011 ; Jul. 17- 21 ; Prague, Czech Republic)
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18.

Magnetic structure of iron borate SmFe3(BO3)4: A neutron diffraction study / C. Ritter [и др.] // The 19th International Conference on Magnetism with Strongly Correlated Electron Systems : book of abstracts. - 2012. - Ст. IJ01. - P. 97

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Доп.точки доступа:
Ritter, C.; Pankrats, A. I.; Панкрац, Анатолий Иванович; Gudim, I. A.; Гудим, Ирина Анатольевна; Vorotynov, A. M.; Воротынов, Александр Михайлович; Korean Physical Society; Korean Magnetics Society; International Union of Pure and Applied Physics; International conference on magnetism (19 ; 2012 ; Jul ; 8-13 ; Busan, Korea / Bexco, Korea)
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19.

In situ transmission electron microscopy and electron diffraction investigations of solid-state reactions in thin-film nanosystems [Текст] / S. M. Zharkov [et al.] // XII Int. symp. self-propagat. high temper. synth. (SHS-2013) : book of abstracts / org. com. I. N. Flerov [et al.] ; progr. com. V. I. Zinenko [et al.]. - 2013. - P. 203-204

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Материалы конференции

Доп.точки доступа:
Zharkov, S. M.; Жарков, Сергей Михайлович; Altunin, R. R.; Алтунин, Роман Русланович; Moiseenko, E. T.; Моисеенко, Евгений Тимофеевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; International symposium on self-propagating high temperature synthesis (12 ; 2013 ; Oct. ; 21–24 ; South Padre Island, USA )
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20.

Raman scattering study of temperature induced phase transitions in crystalline ammonium heptafluorozirconate, (NH4)3ZrF7 / A. S. Krylov [et al.] // Vib. Spectrosc. - 2012. - Vol. 62. - P. 258-263, DOI 10.1016/j.vibspec.2012.07.003. - Cited References: 31. - This work was partly supported by integration project SB RAS No 28, Russian Foundation for Basic Research project No 11-02-98002-r_siberia, No 12-02-00056, SS-4828.2012.2. The authors are grateful to Dr. I.N. Flerov for helpful discussions. The assistance of Dr. S. Skokov is sincerely appreciated. . - ISSN 0924-2031

РУБ Chemistry, Analytical + Chemistry, Physical + Spectroscopy
Рубрики:
VIBRATIONAL-SPECTRA
   X-RAY
   DISORDER
   DIFFRACTION
   ELPASOLITE
   SYMMETRY
   RB2KSCF6
   IF7
Кл.слова (ненормированные):
Raman spectroscopy -- Phase transition -- Ammonium heptafluorozirconate -- Low temperature
Аннотация: This paper reports on a Raman spectroscopy investigation of phase transitions in (NH4)3ZrF7 crystal. Raman spectra were obtained and analyzed in a wavenumber range from 3800 to 15 cm−1 and in the temperature range from 7 to 360 K. The anomalies caused by a series of subsequent structural phase transitions have been analyzed. A soft phonon mode restoring in the distorted phase was found. The spectral changes observed in the current study are similar to those typically found in phase transitions near a tricritical point. The spectral changes in the middle wavenumber range, 700–150 cm−1, indicate that the phase transitions are due to structural ordering of pentagonal ZrF73− bipyramids. Spectral data also show that a phase transition near 225 K is accompanied by an increase of the unit cell volume. In addition, spectral changes in the range of internal vibrations of ammonium ions indicate that the ion's motion slows down with decrease of temperature.

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Держатели документа:
[Krylov, A. S.
Krylova, S. N.
Vtyurin, A. N.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Laptash, N. M.] Russian Acad Sci, Inst Chem, Vladivostok 690022, Russia

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Krylova, S. N.; Крылова, Светлана Николаевна; Laptash, N. M.; Vtyurin, A. N.; Втюрин, Александр Николаевич
}
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