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 Найдено в других БД:Каталог книг и брошюр библиотеки ИФ СО РАН (2)Каталог журналов библиотеки ИФ СО РАН (1)
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Общее количество найденных документов : 36
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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Peng J. L., Bulcock S., Belobrov P. I., Bursill L. A.
Заглавие : Surface bonding states of nano-crystalline diamond balls
Место публикации : Int. J. Mod. Phys. B: WORLD SCIENTIFIC PUBL CO PTE LTD, 2001. - Vol. 15, Is. 31. - P4071-4085. - ISSN 0217-9792, DOI 10.1142/S0217979201007865
Примечания : Cited References: 20
Предметные рубрики: PLASMON RESPONSE
POWDER
SPECTROSCOPY
MICROSCOPY
SILICON
SI(111)
Ключевые слова (''Своб.индексиров.''): diamond--article--crystal structure--electron--energy transfer--nanoparticle--particulate matter--structure analysis--surface property--transmission electron microscopy
Аннотация: The rough surface of nano-crystalline diamond spheres induces surface electronic states which appear as a broadened pre-peak over approx. 15 eV at the C K-edge energy threshold for carbon in the parallel electron energy loss spectrum (PEELS). This appears to be at least partially due to 1s-pi* transitions, although typically the latter occupy a range of only 4 eV for the sp(2) edge of highly-oriented pyrollytic graphite (HOPG). No pi* electrons appear in the conduction band inside the diamond particles, where all electrons are sp(3) hybridized. PEELS data were also obtained from a chemical vapour deposited diamond film (CVDF) and gem-quality diamond for comparison with the spectra of nano-diamonds. The density of sp(2) and sp(3) states on the surface of diamond nano-crystals is calculated for simple structural models of the diamond balls, including some conjecture about surface structures. The results are used to interpret the sp(2)/sp(3) ratios measured from the PEELS spectra recorded as scans across the particles. Surface roughness at the atomic scale was also examined using high-resolution transmission electron microscopy (HRTEM) and electron nano-diffraction patterns were used to confirm the crystal structures.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gavriliuk A. G., Trojan I. A., Lyubutin I. S., Ovchinnikov S. G., Sarkissian V. A.
Заглавие : High-pressure magnetic properties and P-T phase diagram of iron borate
Место публикации : J. Exp. Theor. Phys.: AMER INST PHYSICS, 2005. - Vol. 100, Is. 4. - P688-696. - ISSN 1063-7761, DOI 10.1134/1.1926429
Примечания : Cited References: 24
Предметные рубрики: FEBO3 SINGLE-CRYSTALS
NUCLEAR-RESONANCE
BAND-STRUCTURE
TRANSITION
TEMPERATURE
SCATTERING
Ключевые слова (''Своб.индексиров.''): antiferromagnetic materials--diamonds--ferromagnetic materials--high pressure effects--low temperature effects--magnetic moments--magnetic properties--magnetization--phase diagrams--powders--single crystals--synchrotron radiation--diamond anvil cells--electronic transition--iron borate--nuclear forward scattering (nfs)--iron compounds
Аннотация: The high-pressure magnetic states of iron borate (FeBO3)-Fe-57 single-crystal and powder samples have been investigated in diamond anvil cells by nuclear forward scattering (NFS) of synchrotron radiation at different temperatures. In the low-pressure (0 < P < 46 GPa) antiferromagnetic phase, an increase of the Neel temperature from 350 to 595 K induced by pressure was found. At pressures 46-49 GPa, a transition from the antiferromagnetic to a new magnetic state with a weak magnetic moment (magnetic collapse) was discovered. It is attributed to the electronic transition in Fe3+ ions from the high-spin 3d(5) (S = 5/2, (6)A(1g)) to the low-spin (S = 1/2, T-2(2g)) state (spin crossover) due to the insulator-semiconductor-type transition with extensive suppression of strong d-d electron correlations. At low temperatures, NFS spectra of the high-pressure phase indicate magnetic correlations in the low-spin system with a magnetic ordering temperature of about 50 K. A tentative magnetic P-T phase diagram of FeBO3 is proposed. An important feature of this diagram is the presence of two triple points where magnetic and paramagnetic phases of the high-spin and low-spin states coexist. © 2005 Pleiades Publishing, Inc.
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3.

Вид документа : Однотомное издание
Шифр издания :
Автор(ы) : Isakova V. G., Petrakovskaya E. A., Isakov V. P., Bayukov O. A., Velikanov D. A.
Заглавие : The research of powder fullerene and ultra-despersed diamond composites with metal and oxide nanoparicles
Место публикации : The Physics of Metals and Metallography. - 2006. - Vol. 102, Suppl.1. - С. S57-S60. - DOI 10.1134/S0031918X06140146
Примечания : Библиогр.: 7
Аннотация: Magnetic properties of new nanophase materials based on oxide and metal particles of dtransition metals included in the powder fullerite C60 and detonative ultradispersed diamonds (UDD) are investigated. The materials are obtained by an original method of catalytic combustion reaction.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korets A. Y., Krylov A. S., Mironov E. V.
Заглавие : Molecular structural nonuniformity of ultradispersed diamond-containing material and the reasons why it arises
Место публикации : Russ. J. Phys. Chem. B: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 1, Is. 5. - P485-492. - ISSN 1990-7931, DOI 10.1134/S1990793107050077
Примечания : Cited References: 25. - В описании WOS - Vol. 2 (ошибочно), Is. 5. - P 485-492
Предметные рубрики: DETONATION
Аннотация: An analysis of IR spectra, Raman spectra, and X-ray diffraction intensity curves for diamond-containing materials obtained by the detonation method under different conditions and purified by different methods was used to examine the structural nonuniformity of diamond-containing particles and the reasons why it arises.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ding Y., Haskel D., Ovchinnikov S. G., Tseng Y. C., Orlov Y. S., Lang J. C., Mao H. K.
Заглавие : Novel pressure-induced magnetic transition in magnetite (Fe(3)O(4))
Разночтения заглавия :авие SCOPUS: Novel pressure-induced magnetic transition in magnetite (Fe3O4)
Место публикации : Phys. Rev. Lett.: AMER PHYSICAL SOC, 2008. - Vol. 100, Is. 4. - Ст.45508. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.100.045508
Примечания : Cited References: 39
Предметные рубрики: MULTIPLE-SCATTERING THEORY
X-RAY DICHROISM
LOWER MANTLE
VERWEY TRANSITION
K-EDGE
CIRCULAR-DICHROISM
SPIN TRANSITION
BAND-STRUCTURE
IRON
FE
Ключевые слова (''Своб.индексиров.''): emission spectroscopy--magnetoelectronics--pressure effects--synchrotron radiation--diamond anvil cell--magnetic transition--x-ray magnetic circular dichroism--magnetite
Аннотация: Fe K-edge x-ray magnetic circular dichroism of magnetite (Fe(3)O(4)) powders was measured with synchrotron radiation under variable pressure and temperature conditions in diamond anvil cell. The magnetic dichroism was observed to decrease discontinuously by similar to 50% between 12 and 16 GPa, independent of temperature. The magnetic transition is attributed to a high-spin to intermediate-spin transition of Fe(2+) ions in the octahedral sites and could account for previously observed structural and electrical anomalies in magnetite at this pressure range. The interpretation of x-ray magnetic circular dichroism data is supported by x-ray emission spectroscopy and theoretical cluster calculations.
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6.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Denisov I.A., Belobrov P. I., Tsegelnik S.S., Shaikhutdinov K. A., Znak D.A., Balaev D. A., Bayukov O. A., Korchagina S.B., Petrakovskaya E. A., Velikanov D. A., Volkov N. V., Gordeev S.K.
Заглавие : Magnetization of diamond-graphene flakes composites
Коллективы : Trends in NanoTechnology
Место публикации : Trends in NanoTechnology (TNT 2009). - 2009
Примечания : This research was supported by RFBR Grants 07-04-01340-а and 08-02-00259-a, ME&S of RF Grant No. 2.2.2.2/5309 and U.S. CRDF Grant RUX0-002-KR-06/BP4M02.
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korets A. Y., Krylov A. S., Mironov E. V.
Заглавие : Structural Nonuniformity of Detonation-Produced Diamond-Containing Material
Место публикации : Russ. J. Phys. Chem. B: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2010. - Vol. 4, Is. 5. - P793-796. - ISSN 1990-7931, DOI 10.1134/S1990793110050155
Примечания : Cited References: 10
Ключевые слова (''Своб.индексиров.''): diamond-like material--structural nonuniformity--raman scattering spectroscopy
Аннотация: Raman backscattering spectra (RBS), infrared spectra, and X-ray diffraction intensity curves for various fractions of ultradispersed diamond-containing material (UDDCM) were recorded. The RBS and XRD curves obtained suggest that UDDCM is characterized by sharp variations in the ratio between the diamond and nondiamond components, a factor that makes it possible to consider this phase as an individual product and determines the scale of variations in the main characteristics. Fine UDDCM fractions contain only small amounts diamond-like (sp(3) carbon) grains, if any. One possible reason for changes in the ratio between the phases is density fluctuations under nonequilibrium conditions of synthesis.
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8.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Korets A.Ya., Krylov A.S., Mironov E.V.
Заглавие : Structural heterogeneity detonation diamond containing mate rial
Коллективы : International Shock Interaction Symposium
Место публикации : 19th International Shock Interaction Symposium/ International Shock Interaction Symposium (19 ; 2010 ; Moscow, Russia). - 2010. - С. 19
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9.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Korets A.Ya., Krylov A.S., Mironov E.V.
Заглавие : Structural heterogeneity detonation diamond-containing mate rial
Коллективы : Chaotic modeling and Simulation International Conference
Место публикации : 3rd Chaotic modeling and Simulation International Conference: CHAOS 2010. - 2010. - С. 34
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Korets A.Ya., Krylov A. S., Mironov E. V.
Заглавие : Structural Inhomogeneity of Detonation Diamond Containing Materials
Коллективы : International Conference on Equations of State for Matter, Physics of Ex treme States of Matter
Место публикации : Physics of extreme states of matter - 2010/ International Conference on Equations of State for Matter, Physics of Ex treme States of Matter (25 ; 2010 ; MAR ; 1-6 ; Elbrus, Russia). - 2010. - С. 33-34. - ISBN 978-5-901675-96-0
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