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1.
Slabko, V. V.
Self-organised aggregation of a pair of
particles
with different resonant frequencies and electric dipole moments of transitions, controlled by an external quasi-resonant field / V. V. Slabko, A. S. Tsipotan, A. S. Aleksandrovsky> // Quantum Electron. . - 2013. -
Vol. 43
,
no. 5
. - P. 458-462
DOI
10.1070/QE2013v043n05ABEH015021
Аннотация:
The influence of the oscillation phases of the dipole moments induced in metal nanoparticles and quantum dots by an external laser field on their interaction energy is considered. It is shown that a difference in resonant frequencies leads to the formation of additional minima and maxima, which are absent in the spectral dependence of the interaction energy of identical
particles
at similar orientations of the pair of
particles
with respect to the plane of polarisation of radiation. These features are due to the fact that the oscillation phase difference of the induced dipole moments of
particles
reaches values close to π.
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Публикация на русском языке
Слабко, Виталий Васильевич. Управляемая внешним квазирезонансным полем самоорганизованная агрегация пары частиц с разными резонансными частотами и электродипольными моментами переходов / В. В. Слабко // Квантовая электроника. - 2013. - Т. 43, № 5. - С. 458-462
Доп.точки доступа:
Tsipotan, A. S. ; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Слабко, Виталий Васильевич
}
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2.
Слабко, Виталий Васильевич
.
Управляемая внешним квазирезонансным полем самоорганизованная агрегация пары частиц с разными резонансными частотами и электродипольными моментами переходов / В. В. Слабко, А. С. Ципотан, А. С. Александровский> // Квант. электроника. - 2013. -
Т. 43
,
№ 5
. - С. 458-462
Кл.слова (ненормированные):
взаимодействие лазерного излучения с веществом
--
дипольное взаимодействие
--
наночастицы
--
наноструктуры
Аннотация:
Рассмотрено влияние фаз колебаний наведенных внешним лазерным полем дипольных моментов наночастиц металла и квантовых точек на энергию их взаимодействия. Показано, что различие в резонансных частотах приводит к возникновению дополнительных минимумов и максимумов, отсутствующих в спектральной зависимости энергии взаимодействия идентичных частиц при аналогичных ориентациях пары частиц относительно плоскости поляризации излучения. Последнее связано с достижением разностью фаз колебаний наведенных дипольных моментов частиц величин, близких к π.
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Переводная версия
Self-organised aggregation of a pair of
particles
with different resonant frequencies and electric dipole moments of transitions, controlled by an external quasi-resonant field. - [Б. м. : б. и.]
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Ципотан, Алексей Сергеевич; Александровский, Александр Сергеевич; Aleksandrovsky, A. S.; Slabko V.V.
}
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3.
Microstructure and magnetic
properties of C/Co-P and Al2O3/Co-P composite
particles
prepared by electroless plating / E. A. Denisova [et al.]> // J. Appl. Phys. - 2013. -
Vol. 113
,
Is. 17
. - Ст. 17A340. - P.
DOI
10.1063/1.4800037
Перевод заглавия:
Микроструктура и магнитные свойства композиционных частиц C/Co-P и Al2O3/Co-P, изготовленных методом химического осаждения
Аннотация:
The electroless plating is used to synthesize two types of composite powder, such as the activated carbon with pores filled by Co100-XPX
particles
and the Al2O3 microgranular coated by the shell which consists of Co100-XPX
particles
with 4 X 18. The magnetic and structural properties of the composite
particles
are characterized by scanning electron microscopy, X-ray diffraction, and vibrating sample magnetometer. It is found that the average Co(P) particle size in composite powders decreases from 300 nm to 120 nm with an increase in P- content from 4 to 18 at. %. It causes a reduction in coercivity from 300 to 80 Oe for Al2O3/Co(P) powders and from 680 to 150 Oe for C/Co(P) powders. The effects of two methods of immobilization of Co(P)
particles
on magnetic properties are studied.
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Держатели документа:
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Inst Chem & Chem Technol SB RAS, Krasnoyarsk 660036, Russia;
Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Bondarenko, G. N.; Бондаренко, Галина Николаевна
}
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4.
Spherical magnetic nanoparticles
fabricated by laser target evaporation / A. P. Safronov [et al.]> // AIP Adv. - 2013. -
Vol. 3
,
Is. 5
. - Ст. 052135. - P. ,
DOI
10.1063/1.4808368. - Cited References: 47. - This work was supported by the RFBR 10-02-96015 and 12-02-31385 projects, UrFU 215, Spanish MEC MAT2011-27573-C04 grants, Universidad del Pais Vasco UPV/EHU under UFI11/53 action and Physics Department of the University of Maryland visiting grant. Selected measurements were performed at SGIker service of UPV-EHU. We thank O.M. Samatov, Dr. A.M. Murzakayev, Dr. I. Orue, and A.A. Svalova for special support. . - ISSN 2158-3226
РУБ
Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
IRON-OXIDE NANOPOWDERS
CO2-LASER EVAPORATION
FE3O4 NANOPARTICLES
FINITE-SIZE
TEMPERATURE
FERROMAGNETS
FERROFLUIDS
DEPENDENCE
EXPLOSION
PARTICLES
Аннотация:
Magnetic nanoparticles of iron oxide (MNPs) were prepared by the laser target evaporation technique (LTE). The main focus was on the fabrication of de-aggregated spherical maghemite MNPs with a narrow size distribution and enhanced effective magnetization. X-ray diffraction, transmission electron microscopy, magnetization and microwave absorption measurements were comparatively analyzed. The shape of the MNPs (mean diameter of 9 nm) was very close to being spherical. The lattice constant of the crystalline phase was substantially smaller than that of stoichiometric magnetite but larger than the lattice constant of maghemite. High value of M-s up to 300 K was established. The 300 K ferromagnetic resonance signal is a single line located at a field expected from spherical magnetic
particles
with negligible magnetic anisotropy. The maximum obtained concentration of water based ferrofluid was as high as 10g/l of magnetic material. In order to understand the temperature and field dependence of MNPs magnetization, we invoke the core-shell model. The nanoparticles is said to have a ferrimagnetic core (roughly 70 percent of the caliper size) while the shell consists of surface layers in which the spins are frozen having no long range magnetic order. The core-shell interactions were estimated in frame of random anisotropy model. The obtained assembly of de-aggregated nanoparticles is an example of magnetic nanofluid stable under ambient conditions even without an electrostatic stabilizer. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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Держатели документа:
RAS, Inst Electrophys, Ekaterinburg 620016, Russia
Urals Fed Univ, Ekaterinburg 620000, Russia
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Basque Country UPV EHU, Dept Elect & Elect, Bilbao 48080, Spain
Univ Basque Country UPV EHU, SGIker, Bilbao 48080, Spain
Univ Maryland, Dept Phys, FMR Grp, College Pk, MD 20742 USA
Доп.точки доступа:
Safronov, A. P.; Beketov, I. V.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Kurlyandskaya, G. V.; Medvedev, A. I.; Leiman, D. V.; Larranaga, A.; Bhagat, S. M.
}
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5.
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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6.
Structural diagnostics of
functional nanomaterials with the use of X-ray synchrotron radiation / N. N. Trofimova [et al.]> // Nanotechnologies in Russia. - 2013. -
Vol. 8
,
Is. 5-6
. - P. 396-401,
DOI
10.1134/S1995078013030191 . - ISSN 1995-0780
Кл.слова (ненормированные):
Experimental facilities
--
Functional Nano materials
--
Kurchatov synchrotron radiation
--
Magnetic nano-
particles
--
Research capabilities
--
Structural diagnostics
--
Structural elements
--
X-ray synchrotron radiation
--
Nanostructured materials
--
Synchrotron radiation
Аннотация:
An experimental facility for the complex X-ray diagnostics of functional nanomaterials (Structural Materials Science beamline) installed at the Kurchatov Synchrotron Radiation Center is presented. The key structural elements of the beamline are described. The research capabilities of the facility are demonstrated by the example of transparent magnets and glasses with magnetic nanoparticles, which are promising for the design of magneto-optical data storage and spintronics devices.
Scopus
Публикация на русском языке
Структурная диагностика функциональных наноматериалов с использованием рентгеновского синхротронного излучения // Российские нанотехнологии. - Москва : Парк-медиа, 2013. - Т. 8, № 5-6. - С. 108-112
Держатели документа:
National Research Center Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182, Russian Federation
Faculty of Chemistry, Moscow State University, Moscow, 119991, Russian Federation
Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow oblast, 141700, Russian Federation
Kirenskii Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow, 119991, Russian Federation
Доп.точки доступа:
Trofimova, N. N.; Veligzhanin, A. A.; Murzin, V.Y; Chernyshov, A. A.; Khramov, E. V.; Zabluda, V. N.; Заблуда, Владимир Николаевич; Edel'man, I. S.; Эдельман, Ирина Самсоновна; Slovokhotov, Y. L.; Zubavichus, Y. V.
}
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7.
Correlation of magnetic
anisotropy energy and order parameter in nanostructured CoPt
particles
/ S. V. Komogortsev [и др.]> //
V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013 = EASTMag-2013. - P70 . - ISBN 978-5-7444-3124-2
Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Zimin, A. A.; Зимин, А. А.; Korenev, S. V.; Коренев С.В.; Filatov, E. Yu.; Филатов Е.Ю.; Shubin, Yu. V.; Шубин Ю.В.; Chizhik, N. A.; Чижик Н.А.; Yurkin, G.Yu.; Юркин, Глеб Юрьевич; Eremin, E. V.; Еремин, Евгений Владимирович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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8.
Magnetic
particles
in
mesoporous silica MCM-41 / E. A. Denisova, S. V. Komogortsev> //
V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P176 . - ISBN 978-5-7444-3124-2
Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Li, O. A.; Ли О.А.; Chekanova, L. A.; Чеканова, Лидия Александровна; Patrusheva, T. N.; Патрушева, Тамара Николаевна; Eremin, E. V.; Еремин, Евгений Владимирович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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9.
Correlation of magnetic
anisotropy energy and order parameter in nanostuctured CoPt
particles
/ S. V. Komogortsev [и др.]> //
V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P246 . - ISBN 978-5-7444-3124-2
Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Zimin, A. A.; Зимин, А. А.; Filatov, E. Yu. ; Филатов Е.Ю.; Korenev, S. V. ; Коренев С.В.; Shubin, Yu. V. ; Шубин Ю.В.; Chizhik, N. A. ; Чижик Н.А.; Yurkin, G.Yu.; Юркин, Глеб Юрьевич; Eremin, E. V.; Еремин, Евгений Владимирович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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10.
Magnetic nanoparticles formed
in glasses co-doped with iron and larger radius elements / I. S. Edelman [et al.]> // J. Appl. Phys. - 2012. -
Vol. 112
,
Is. 8
. - Ст. 84331. - P. ,
DOI
10.1063/1.4759244. - Cited References: 65. - This work was partly supported by the Russian Foundation for Basic Research, Grant Nos. 07-02-92174 RFBR-CNRS and 11-02-00972, and President of Russia Federation Grant No NSh 1044.2012.2. A. Artemenko acknowledges financial support from the Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme (EPREXINA, GA 255662). The synchrotron measurements were supported via the Russian federal Contract No. 16.552.11.7003. The authors thank K. P. Polyakova for the preparation of thin films. . - ISSN 0021-8979
РУБ
Physics, Applied
Рубрики:
SUPERPARAMAGNETIC RESONANCE
FERROMAGNETIC-RESONANCE
TEMPERATURE-DEPENDENCE
FERRITE NANOPARTICLES
OXIDE NANOPARTICLES
FARADAY-ROTATION
CERAMICS
ANISOTROPY
PARTICLES
SPECTRA
Аннотация:
A new type of nanoparticle-containing glasses based on borate glasses co-doped with low contents of iron and larger radius elements, Dy, Tb, Gd, Ho, Er, Y, and Bi, is studied. Heat treatment of these glasses results in formation of magnetic nanoparticles, radically changing their physical properties. Transmission electron microscopy and synchrotron radiation-based techniques: x-ray diffraction, extended x-ray absorption fine structure, x-ray absorption near-edge structure, and small-angle x-ray scattering, show a broad distribution of nanoparticle sizes with characteristics depending on the treatment regime; a crystalline structure of these nanoparticles is detected in heat treated samples. Magnetic circular dichroism (MCD) studies of samples subjected to heat treatment as well as of maghemite, magnetite, and iron garnet allow to unambiguously assign the nanoparticle structure to maghemite, independently of co-dopant nature and of heat treatment regime used. Different features observed in the MCD spectra are related to different electron transitions in Fe3+ ions gathered in the nanoparticles. The static magnetization in heat treated samples has non-linear dependence on the magnetizing field with hysteresis. Zero-field cooled magnetization curves show that at higher temperatures the nanoparticles occur in superparamagnetic state with blocking temperatures above 100 K. Below ca. 20 K, a considerable contribution to both zero field-cooled and field-cooled magnetizations occurs from diluted paramagnetic ions. Variable-temperature electron magnetic resonance (EMR) studies unambiguously show that in as-prepared glasses paramagnetic ions are in diluted state and confirm the formation of magnetic nanoparticles already at earlier stages of heat treatment. Computer simulations of the EMR spectra corroborate the broad distribution of nanoparticle sizes found by "direct" techniques as well as superparamagnetic nanoparticle behaviour demonstrated in the magnetization studies. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4759244]
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Держатели документа:
[Edelman, I.
Ivanova, O.
Ivantsov, R.
Velikanov, D.
Zabluda, V.] LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
[Zubavichus, Y.
Veligzhanin, A.] NRC Kurchatov Inst, Moscow 123182, Russia
[Zaikovskiy, V.] Siberian Branch RAS, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
[Stepanov, S.] SI Vavilov State Opt Inst, St Petersburg, Russia
[Artemenko, A.] CNRS, ICMCB, UPR 9048, F-33608 Pessac, France
[Curely, J.
Kliava, J.] Univ Bordeaux 1, CNRS, UMR 5798, LOMA, F-33405 Talence, France
Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivanova, O. S.; Иванова, Оксана Станиславовна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Zabluda, V. N.; Заблуда, Владимир Николаевич; Zubavichus, Y.; Veligzhanin, A. A.; Zaikovskiy, V. I.; Stepanov, S.; Artemenko, A.; Curely, J.; Kliava, J.
}
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11.
Superconductivity in repulsive
fermi-systems at low density / M. Y. Kagan [et al.]> // J. Supercond. Nov. Magn. - 2013. -
Vol. 26
,
Is. 9
. - P. 2809-2815,
DOI
10.1007/s10948-013-2262-9. - Cited References: 57. - The authors acknowledge helpful discussions with A. V. Chubukov, A. S. Alexandrov, V. V. Kabanov, K. I. Kugel, Yu. V. Kopaev, N.M. Plakida, N.V. Prokof'ev, M. M. Korovushkin, M. A. Mitskan. M. Yu. K. work was supported by RFBR grant No. 11-02-00741. . - ISSN 1557-1939
Перевод заглавия:
Сверхпроводимость в Ферми-системах с отталкиванием при малых концентрациях
РУБ
Physics, Applied + Physics, Condensed Matter
Рубрики:
T-J MODEL
SUPERFLUID TRANSITION-TEMPERATURE
FRACTIONAL-STATISTICS
PHASE-SEPARATION
HUBBARD-MODEL
GAS
ENHANCEMENT
MECHANISM
EXCHANGE
PARTICLES
Кл.слова (ненормированные):
Anomalous superconductivity
--
p-wave and d-wave pairings
--
Kohn-Luttinger mechanism
--
Shubin-Vonsovsky
--
Hubbard and t-J models
Аннотация:
In the large variety of models such as 3D and 2D Fermi-gas model with hard-core repulsion, 3D and 2D Hubbard model, and the Shubin-Vonsovsky model, we demonstrate the possibility of triplet p-wave pairing at low electron density. We show that the critical temperature of the p-wave pairing can be strongly increased in a spin-polarized case or in a two-band situation already at low density and reach experimentally feasible values of (1-5) K. We also discuss briefly d-wave pairing and high-T-C superconductivity with T-C similar to 100 K, which arises in the 2D t-J model in the range of parameters realistic for cuprates.
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Держатели документа:
PL Kapitsa Phys Problems Inst, Moscow 119334, Russia
Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany
Hofstra Univ, Dept Phys & Astron, Hempstead, NY 11549 USA
Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Kagan, M. Y.; Efremov, D. V.; Mar'enko, M. S.; Val'kov, V. V.; Вальков, Валерий Владимирович; RFBR [11-02-00741]
}
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12.
Effects of size
polydispersity on the extinction spectra of colloidal nanoparticle aggregates / A. E. Ershov [et al.]> // Phys. Rev. B. - 2012. -
Vol. 85
,
Is. 4
. - Ст. 045421. - P. ,
DOI
10.1103/PhysRevB.85.045421. - Cited References: 41. - This work was supported by grants from the following foundations of the Russian Federation: Presidium of RAS, OFN RAS, and SB RAS. . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
METAL FRACTAL CLUSTERS
OPTICAL-PROPERTIES
ABSORPTION
NONLINEARITIES
COMPOSITES
SCATTERING
PARTICLES
SPHERES
GRAINS
Аннотация:
We investigate the effect of particle polydispersity on the optical extinction spectra of colloidal aggregates of spherical metallic (silver) nanoparticles, taking into account the realistic interparticle gaps caused by layers of stabilizing polymer adsorbed on the metal surface (adlayers). The spectra of computer-generated aggregates are computed using two different methods. The coupled-multipole method is used in the quasistatic approximation and the coupled-dipole method beyond the quasistatics. The latter approach is applicable if the interparticle gaps are sufficiently wide relative to the particle radii. Simulations are performed for two different particle size distribution functions (bimodal and Gaussian), varying the number of
particles
per aggregate, and different distribution functions of the interparticle gap width. The strong influence of the latter factor on the spectra is demonstrated and investigated in detail.
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Держатели документа:
[Ershov, Alexander E.
Isaev, Ivan L.
Semina, Polina N.
Karpov, Sergei V.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ershov, Alexander E.
Karpov, Sergei V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Markel, Vadim A.] Univ Penn, Dept Bioengn, Dept Radiol, Philadelphia, PA 19104 USA
[Markel, Vadim A.] Univ Penn, Grad Grp Appl Math & Computat Sci, Philadelphia, PA 19104 USA
Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Isaev, I. L.; Исаев, Иван Леонидович; Semina, P. N.; Семина, Полина Николаевна; Markel, V. A.; Karpov, S. V.; Карпов, Сергей Васильевич
}
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13.
Magnetic anisotropy and
order parameter in nanostructured CoPt
particles
/ S. V. Komogortsev [et al.]> // Appl. Phys. Lett. - 2013. -
Vol. 103
,
Is. 15
. - Ст. 152404. - P. ,
DOI
10.1063/1.4824973. - Cited References: 36. - The authors are grateful to Dr. A. V. Zadesenets for synthesis of CoPt complex precursor and Dr. A. S. Bogomyakov for assistance in magnetic measurements. The work was supported by RFBR (Grant Nos. 11-03-00168-a and 12-02-00943-a), Interdisciplinary integration of fundamental research of SB RAS (2012-2014) project No. 64, and grant of the President of the Russian Federation (No. MK-1934.2013.3). . - ISSN 0003-6951
РУБ
Physics, Applied
Рубрики:
FEPT THIN-FILMS
REMANENT MAGNETIZATION
UNIAXIAL ANISOTROPIES
FINE
PARTICLES
NANOPARTICLES
FERROMAGNETS
PHASE
Аннотация:
The correlation of magnetic anisotropy energy with order parameter in the crystallites of CoPt nanostructured
particles
prepared by thermal decomposition and further annealing has been studied by investigation of the approach magnetization to saturation curves and x-ray powder diffraction pattern profiles. It is shown that magnetic anisotropy energy value in partially ordered CoPt crystallite could be described as an intermediate case between two extremes, corresponding to either single or several c-domains of L1(0) phase in crystallite. (C) 2013 AIP Publishing LLC.
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Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
SB RAS, Nikolaev Inst Inorgan Chem, Novosibirsk 630090, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Zimin, A. A.; Зимин, А. А.; Filatov, E. Y.; Korenev, S. V.; Shubin, Y. V.; Chizhik, N. A.; Yurkin, G.Yu.; Юркин, Глеб Юрьевич; Eremin, E. V.; Еремин, Евгений Владимирович; RFBR [11-03-00168-a, 12-02-00943-a]; Interdisciplinary integration of fundamental research of SB RAS [64]; Russian Federation [MK-1934.2013.3]
}
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14.
Surface effects and
magnetic ordering in few-nanometer-sized ε-Fe 2O3
particles
/ D. A. Balaev [et al.]> // J. Appl. Phys. - 2013. -
Vol. 114
,
Is. 16
. - Ст. 163911. - P. ,
DOI
10.1063/1.4827839 . - ISSN 0021-8979
Аннотация:
The magnetic properties of ?-Fe2O3 nanoparticles with an average size of 3.4 nm in a silica gel matrix are investigated using Mossbauer technique, electron spin resonance, and magnetic measurements. Two magnetic subsystems reveal in magnetic measurements. Paramagnetic subsystem is formed by the Fe(III) ions in the smallest (<3.5 nm)
particles
' shell, while ferrimagnetic ordering in the "core" of the
particles
results in superparamagnetic behavior. The superparamagnetic behavior of the investigated samples is observed up to ?800 K. The magnetic moment of the
particles
is formed by both the ferrimagnetic ordering characteristic of ?-Fe 2O3 and the additional effect of uncompensated sublattices (planes). В© 2013 AIP Publishing LLC.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia
Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Bayukov, O. A.; Баюков, Олег Артемьевич; Yakushkin, S. S.; Bukhtiyarova, G. A.; Martyanov, O. N.
}
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15.
Kolovsky, A. R.
Wannier-Stark states and Bloch oscillations in the honeycomb lattice / A. R. Kolovsky, E. N. Bulgakov> // Phys. Rev. B. - 2013. -
Vol. 87
,
Is. 3
. - Ст. 033602. - P. ,
DOI
10.1103/PhysRevA.87.033602 . - ISSN 1050-2947
Кл.слова (ненормированные):
Bloch oscillations
--
Chaotic state
--
Honeycomb lattices
--
Localization length
--
Localized state
--
Quantum
particles
--
Static fields
--
Tight-binding approximations
--
Solid state physics
--
Honeycomb structures
Аннотация:
We study a quantum particle in a tilted honeycomb lattice in the tight-binding approximation. First we discuss the particle eigenstates, i.e., the stationary Wannier-Stark states. These states are proved to be extended states for the rational directions of the static field and localized states for the irrational directions. We find energy bands of the extended states and analyze the localized states. It is shown, in particular, that the localized honeycomb Wannier-Stark states are chaotic states with irregular dependence of the localization length on the static field magnitude. Second we discuss Bloch oscillations of the quantum particle. Irregular Bloch oscillations for irrational directions are observed. В© 2013 American Physical Society.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Bulgakov, E. N.; Булгаков, Евгений Николаевич; Коловский, Андрей Радиевич
}
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16.
Kolovsky, A. R.
Cyclotron-Bloch dynamics of a quantum particle in a two-dimensional lattice / A. R. Kolovsky, G. Mantica> // Physical Review E - Statistical, Nonlinear, and Soft Matter Physics. - 2011. -
Vol. 83
,
Is. 4
. - Ст. 041123,
DOI
10.1103/PhysRevE.83.041123 . - ISSN 1539-3755
Кл.слова (ненормированные):
Critical value
--
Directed transport
--
Drift velocities
--
Electric and magnetic fields
--
Electric field magnitude
--
Electric field vectors
--
Free space
--
Initial conditions
--
Lattice plane
--
Quantum dynamics
--
Quantum
particles
--
Quantum wave packets
--
Two dimensional square lattice
--
Two-dimensional lattices
--
Electric fields
--
Magnetic fields
--
Quantum theory
--
Vector spaces
--
Two dimensional
Аннотация:
This paper studies the quantum dynamics of a charged particle in a two-dimensional square lattice, under the influence of electric and magnetic fields, the former being aligned with one of the lattice axes and the latter perpendicular to the lattice plane. While in free space these dynamics consist of uniform motions in the direction orthogonal to the electric field vector, we find that, in a lattice, this directed drift takes place only for specific initial conditions and for electric field magnitudes smaller than a critical value. Otherwise, the quantum wave packet spreads ballistically in both directions orthogonal to the electric field. We quantify this ballistic spreading and identify the subspace of initial conditions ensuring directed transport with the drift velocity. We also describe the effect of disorder in the system. В© 2011 American Physical Society.
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Держатели документа:
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, 660041 Krasnoyarsk, Russian Federation
Center for Nonlinear and Complex Systems, University of Insubria, I-22100 Como, Italy
CNISM Unita di Como, I.N.F.N. Sezione di Milano, Italy
Доп.точки доступа:
Mantica, G.; Коловский, Андрей Радиевич
}
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17.
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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18.
Kuzovnikova, L. A.
Magnetic nanocomposite Al2O3/Co100-XPX
particles
: structure and magnetic properties / L. А. Kuzovnikova, Е. А. Denisova, L. А. Chekanova> //
19th International Symposium on Metastable, Amorphous and Nanostructural Materials (ISMANAM-2012) : book of abstracts. - 2012. - P. 149
Материалы конференции
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Денисова, Елена Александровна; Denisova, E. A.; Chekanova, L. A.; Чеканова, Лидия Александровна; Кузовникова, Людмила Александровна; Национальный исследовательский технологический университет "МИСИС"; International Symposium on Metastable, Amorphous and Nanostructural Materials(19 ; 2012 ; июнь ; 18-22 ; Москва); Международный симпозиум по метастабильным, аморфным и наноструктурированным материалам(19 ; 2012 ; июнь ; 18-22 ; Москва)
}
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19.
Karpov, S. V.
The role of the electron tunneling effect in the coagulation kinetics of polydisperse metal nanocolloids / S. V. Karpov, P. N. Semina, A. P. Gavrilyuk> // Colloid J. - 2012. -
Vol. 74
,
Is. 3
. - P. 305-312,
DOI
10.1134/S1061933X12030052. - Cited References: 16. - Authors are thankful to G. A. Chiganova for discussions and helpful comments. Studies were carried out with the support of grants: the Presidium of RAS No 29 and No 31, OFN RAS III.9.5, IP SB RAS No 43, IP SB RAS (and SFU) No 101. . - ISSN 1061-933X
РУБ
Chemistry, Physical
Рубрики:
PARTICLES
Аннотация:
The energy of pair interactions between metal nanoparticles of different sizes is shown to be able to increase upon coagulation due to the additional electrostatic effect resulting from mutual heteropolar charging of the
particles
. The tunnel electron transfer occurring upon the collisions between
particles
of different sizes may be the reason for the charging. The transfer is caused by the dependence of the electron work function on the particle size. The electron transfer through the interparticle gap equalizes the Fermi levels in
particles
of different sizes and is associated with this dependence. Using the example of bimodal silver nanocolloids, it is shown that mutual heteropolar charging of
particles
with different sizes may accelerate the coagulation of polydisperse colloidal systems by an order of magnitude or more as compared with monodisperse systems, in which this effect is absent.
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Публикация на русском языке
Карпов, Сергей Васильевич. Роль электронного туннельного эффекта в кинетике коагуляции полидисперсных наноколлоидов металлов [Текст] / С. В. Карпов, П. Н. Сёмина, А. П. Гаврилюк // Коллоид. журн. - М. : Наука, 2012. - Т. 74 № 3. - С. 329-336
Держатели документа:
[Karpov, S. V.
Semina, P. N.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Karpov, S. V.] Siberian Fed Univ, Krasnoyarsk 660028, Russia
[Gavrilyuk, A. P.] Russian Acad Sci, Siberian Branch, Inst Computat Modeling, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Semina, P. N.; Семина, Полина Николаевна; Gavrilyuk, A. P.; Карпов, Сергей Васильевич
}
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20.
Synthesis and electronic
properties of β-RbNd(MoO4)2 / V. V. Atuchin [et al.]> // Asian J. Chem. - 2014. -
Vol. 26
,
No. 5
. - P. 1284-1286,
DOI
10.14233/ajchem.2014.17209. - Cited References: 26. - This study is partly supported by by the Ministry of Education and Science of the Russian Federation. . - ISSN 0970-7077
Перевод заглавия:
Синтез и электронные свойства бета-RbNd(MoO4)2
РУБ
Chemistry, Multidisciplinary
Рубрики:
UP-CONVERSION PHOTOLUMINESCENCE
VIBRATIONAL PROPERTIES
CRYSTAL-STRUCTURE
PARTICLES
MOLYBDATE
SPECTROSCOPY
SYSTEM
ER3+
Кл.слова (ненормированные):
β-RbNd(MoO4)2
--
Electronic structure
--
Ab initio calculations
--
X-Ray photoelectron spectroscopy
Аннотация:
The electronic structure of β-RbNd(MoO4)2 has been evaluated from experimental and theoretical points of view. For the molybdate, X-ray photoelectron valence-band spectra have been measured. The total and partial densities of states of the constituent atoms of β-RbNd(MoO4)2 have been calculated using the FP-LAPW method. The FP-LAPW data reveal that main contributors in the valence-band region of β-RbNd(MoO4)2 are the Rb 4p-, Nd 4f-, Mo 4d- and O 2p-like states.
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Держатели документа:
SB RAS, Lab Opt Mat & Struct, Inst Semicond Phys, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Natl Acad Sci Ukraine, Frantsevich Inst Problems Mat Sci, UA-03142 Kiev, Ukraine
SB RAS, Lab Oxide Syst, Baikal Inst Nat Management, Ulan Ude 670047, Russia
SB RAS, Lab Crystal Phys, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Hanseo Univ, Dept Adv Mat Sci & Engn, Seosan 356706, South Korea
Доп.точки доступа:
Atuchin, V. V.; Bekenev, V. L.; Chimitova, O. D.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bazarov, B. G.; Базаров Б. Г.; Bazarova, J. G.; Базарова Ж. Г.; Khuzhum, O. Y.; Lim, C. S.
}
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