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1.


   
    Surface bonding states of nano-crystalline diamond balls / J. L. Peng [et al.] // Int. J. Mod. Phys. B. - 2001. - Vol. 15, Is. 31. - P. 4071-4085, DOI 10.1142/S0217979201007865. - Cited References: 20 . - ISSN 0217-9792
РУБ Physics, Applied + Physics, Condensed Matter + Physics, Mathematical
Рубрики:
PLASMON RESPONSE
   POWDER

   SPECTROSCOPY

   MICROSCOPY

   SILICON

   SI(111)

Кл.слова (ненормированные):
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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Держатели документа:
RMIT Univ, Dept Appl Phys, Melbourne, Vic 3051, Australia
Univ Sydney, Electron Microscope Unit, Sydney, NSW 2006, Australia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Mol Architecture Grp, Krasnoyarsk 660036, Russia
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia
Univ Melbourne, Sch Phys, Parkville, Vic 3052, Australia
ИФ СО РАН
ИБФ СО РАН
Department of Applied Physics, RMIT University, Swanston Street, Melbourne, Vic. 3051, Australia
Electron Microscope Unit, University of Sydney, NSW 2006, Australia
Molecular Architecture Group, Kirensky Institute of Physics, Institute of Biophysics, 660036 Krasnoyarsk, Russian Federation
School of Physics, University of Melbourne, Parkville, Vic. 3010, Australia

Доп.точки доступа:
Peng, J. L.; Bulcock, S.; Belobrov, P. I.; Белобров, Петр Иванович; Bursill, L. A.
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2.


   
    High-pressure magnetic properties and P-T phase diagram of iron borate / A. G. Gavriliuk [et al.] // J. Exp. Theor. Phys. - 2005. - Vol. 100, Is. 4. - P. 688-696, DOI 10.1134/1.1926429. - Cited References: 24 . - ISSN 1063-7761
РУБ Physics, Multidisciplinary
Рубрики:
FEBO3 SINGLE-CRYSTALS
   NUCLEAR-RESONANCE

   BAND-STRUCTURE

   TRANSITION

   TEMPERATURE

   SCATTERING

Кл.слова (ненормированные):
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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Держатели документа:
Inst High Pressure Phys, Troitsk 142190, Moscow Oblast, Russia
Russian Acad Sci, Inst Crystallog, Moscow 119333, Russia
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute for High-Pressure Physics, Troitsk, Moscow oblast, 142190, Russian Federation
Institute of Crystallography, Russian Academy of Sciences, Moscow, 119333, Russian Federation
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Gavriliuk, A. G.; Trojan, I. A.; Lyubutin, I. S.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Sarkissian, V. A.
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3.


   
    The research of powder fullerene and ultra-despersed diamond composites with metal and oxide nanoparicles [Text] / V. G. Isakova, E. A. Petrakovskaya, V. P. Isakov [и др.] // The Physics of Metals and Metallography. - 2006. - Vol. 102, Suppl.1. - S57-S60DOI 10.1134/S0031918X06140146. - 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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Держатели документа:
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036 Russia
Krasnoyarsk State University, Krasnoyarsk, 660041 Russia

Доп.точки доступа:
Isakova, V. G.; Исакова, Виктория Гавриловна; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Isakov, V. P.; Bayukov, O. A.; Баюков, Олег Артемьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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4.


    Korets, A. Y.
    Molecular structural nonuniformity of ultradispersed diamond-containing material and the reasons why it arises / A. Y. Korets, A. S. Krylov, E. V. Mironov // Russ. J. Phys. Chem. B. - 2007. - Vol. 1, Is. 5. - P. 485-492, DOI 10.1134/S1990793107050077. - Cited References: 25. - В описании WOS - Vol. 2 (ошибочно), Is. 5. - P 485-492 . - ISSN 1990-7931
РУБ Physics, Atomic, Molecular & Chemical
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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Держатели документа:
[Korets, A. Ya.
Mironov, E. V.] Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
[Krylov, A. S.] Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Mironov, E. V.
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5.


   
    Novel pressure-induced magnetic transition in magnetite (Fe(3)O(4)) / Y. . Ding [et al.] // Phys. Rev. Lett. - 2008. - Vol. 100, Is. 4. - Ст. 45508, DOI 10.1103/PhysRevLett.100.045508. - Cited References: 39 . - ISSN 0031-9007
РУБ Physics, Multidisciplinary
Рубрики:
MULTIPLE-SCATTERING THEORY
   X-RAY DICHROISM

   LOWER MANTLE

   VERWEY TRANSITION

   K-EDGE

   CIRCULAR-DICHROISM

   SPIN TRANSITION

   BAND-STRUCTURE

   IRON

   FE

Кл.слова (ненормированные):
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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Держатели документа:
Mao, Ho-kwang] Carnegie Inst Washington, HPSynC, Argonne, IL 60439 USA
Lang, Jonathan C.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
[Ovchinnikov, Sergei G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Orlov, Yuri S.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Mao, Ho-kwang] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA
[Mao, Ho-kwang] Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA
HPSynC, Carnegie Institution of Washington, 9700 South Cass Avenue, Argonne, IL 60439, United States
Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Science, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015, United States
HPCAT, Carnegie Institution of Washington, Building 434E, 9700 South Cass Avenue, Argonne, IL 60439, United States

Доп.точки доступа:
Ding, Y.; Haskel, D.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Tseng, Y. C.; Orlov, Y. S.; Lang, J. C.; Mao, H. K.
}
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6.


   
    Magnetization of diamond-graphene flakes composites / I. A. Denisov, P. I. Belobrov [et al.] // Trends in NanoTechnology (TNT 2009). - 2009. - 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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Доп.точки доступа:
Denisov, I.A.; Belobrov, P. I.; Белобров, Петр Иванович; Tsegelnik, S.S.; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Znak, D.A.; Balaev, D. A.; Балаев, Дмитрий Александрович; Bayukov, O. A.; Баюков, Олег Артемьевич; Korchagina, S.B.; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Volkov, N. V.; Волков, Никита Валентинович; Gordeev, S.K.; Trends in NanoTechnology(2009 ; Sep. 7-11 ; Barcelona, Spain)
}
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7.


    Korets, A. Y.
    Structural Nonuniformity of Detonation-Produced Diamond-Containing Material / A. Y. Korets, A. S. Krylov, E. V. Mironov // Russ. J. Phys. Chem. B. - 2010. - Vol. 4, Is. 5. - P. 793-796, DOI 10.1134/S1990793110050155. - Cited References: 10 . - ISSN 1990-7931
РУБ Physics, Atomic, Molecular & Chemical

Кл.слова (ненормированные):
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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Держатели документа:
[Korets, A. Ya.] Siberian Fed Univ, Krasnoyarsk, Russia
[Krylov, A. S.] Russian Acad Sci, Kirenskii Inst Phys, Siberian Div, Krasnoyarsk, Russia
[Mironov, E. V.] Krasnoyarsk Inst Railway Transport, Krasnoyarsk, Russia
ИФ СО РАН

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Mironov, E. V.
}
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8.


   
    Structural heterogeneity detonation diamond containing mate rial [Text] / A. Ya. Korets, A. S. Krylov, E. V. Mironov // 19th International Shock Interaction Symposium / International Shock Interaction Symposium (19 ; 2010 ; Moscow, Russia). - 2010. - P19


Доп.точки доступа:
Korets, A.Ya.; Krylov, A.S.; Mironov, E.V.; International Shock Interaction Symposium(19 ; 2010 ; Moscow, Russia)
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9.


   
    Structural heterogeneity detonation diamond-containing mate rial [Text] / A. Ya. Korets, A. S. Krylov, E. V. Mironov // 3rd Chaotic modeling and Simulation International Conference: CHAOS 2010. - 2010. - P34


Доп.точки доступа:
Korets, A.Ya.; Krylov, A.S.; Mironov, E.V.; Chaotic modeling and Simulation International Conference(2010 ; Jun/ ; 1-4 ; Chania, Crete, Greece)
}
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10.


   
    Structural Inhomogeneity of Detonation Diamond Containing Materials / Korets A.Ya., Krylov A.S., Mironov E.V. // 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. - P33-34 . - ISBN 978-5-901675-96-0

Материалы конференции

Доп.точки доступа:
Korets A.Ya.; Krylov, A. S.; Крылов, Александр Сергеевич; Mironov, E. V.; International Conference on Equations of State for Matter, Physics of Ex treme States of Matter(25 ; 2010 ; MAR ; 1-6 ; Elbrus, Russia)
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