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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gunyakov V. A., Parshin A. M., Khrustalev B. P., Shabanov V. F.
Заглавие : Determination of anchoring energy for nematic onto ferroelectric substrate
Место публикации : Solid State Commun.: PERGAMON-ELSEVIER SCIENCE LTD, 1993. - Vol. 87, Is. 9. - P.751-753. - ISSN 0038-1098, DOI 10.1016/0038-1098(93)90406-D
Примечания : Cited References: 8
Предметные рубрики: LIQUID-CRYSTALS
SURFACE
Аннотация: A technique to determine anchoring energy of planar MBBA layer with cleavage surfaces of triglycine sulphate is presented. The method is based on guest-host phenomenon in impure nematic. The anchoring energy W = (1.0 +/- 0.3).10(-4) erg/cm2 is calculated within Rapini-Papoular approximation.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gunyakov V. A., Parshin A. M., Shabanov V. F.
Заглавие : Investigation of the nematic-ferroelectric interface under a strong magnetic field
Место публикации : Solid State Commun.: PERGAMON-ELSEVIER SCIENCE LTD, 1998. - Vol. 105, Is. 12. - P761-765. - ISSN 0038-1098, DOI 10.1016/S0038-1098(97)10221-6
Примечания : Cited References: 14
Предметные рубрики: ANCHORING ENERGY
LIQUID-CRYSTAL
WALL INTERFACE
SURFACE
TRANSITION
Ключевые слова (''Своб.индексиров.''): ferroelectrics--liquid crystals--surfaces and interfaces--phase transitions--light absorption
Аннотация: The behaviour of methoxy benzylidene butyl aniline (MBBA) nematic liquid crystal on the;cleavage surface of triglycine sulphate under a strong magnetic field has been investigated. With the saturation regime obtained for the liquid crystal cell in fields up to 100 kOe, for the first time the possibility appears to determine not only the ordinary anchoring coefficient W-2, but the effective anchoring energy W* without any fitting procedure. Considerable difference in these parameters (two orders of magnitude) disagrees with "electrical" corrections of the Rapini-Papoular approximation. This discrepancy is connected with the surface polarization caused by spontaneous ordering of longitudinal components of MBBA molecular dipoles on interface. The form of the anisotropic interaction potential for such interfaces has to take into account polar effects in near-surface layers of the liquid crystal. (C) 1998 Elsevier Science Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Myagkov V. G., Bykova L. E., Bondarenko G. N.
Заглавие : Epitaxial B2-NiAl layers formed by nanosecond laser irradiation of thin Al/Ni bilayers
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2006. - Vol. 32, Is. 10. - P827-830. - ISSN 1063-7850, DOI 10.1134/S1063785006100026
Примечания : Cited References: 18
Предметные рубрики: POWDER MIXTURES
TRANSFORMATION
TRANSITIONS
OLIVINE
SURFACE
Аннотация: The results of experiments on the synthesis of epitaxial B2-NiAl layers by means of nanosecond laser irradiation of sequentially deposited thin nickel and aluminum layers (Al/Ni bilayers) on a MgO(001) substrate surface are presented. Features of the phase formation under the laser action and during the combustion wave initiation are considered. The rapid formation of an epitaxial B2-NiAl layer is explained in terms of a martensitic-like mechanism of the transfer of reacting atoms via a layer of reaction products. It is suggested that this mechanism can compete with diffusion via grain boundaries and dislocation, thus explaining the ultrafast transfer of reacting atoms via a layer of reaction products for various methods of initiation of the solid-state synthesis.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Markov V. V., Edelman I. S., Seredkin V. A.
Заглавие : Mechanism of magnetic ordering in Dy1-xNix-Nibilayer films
Разночтения заглавия :авие SCOPUS: Mechanism of magnetic ordering in Dy1-x Ni x -Ni bilayer films
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 49, Is. 5. - P900-904. - ISSN 1063-7834, DOI 10.1134/S1063783407050162
Примечания : Cited References: 18. - This work was supported by the Department of Physical Sciences of the Russian Academy of Sciences (program “Spintronics”) and the Siberian Division of the Russian Academy of Sciences (complex integration project no. 3.5)
Предметные рубрики: DYSPROSIUM
MULTILAYERS
SURFACE
DY
Ключевые слова (''Своб.индексиров.''): 73--20--at--73--61--at--75--70---i
Аннотация: A mechanism for the magnetic ordering of dysprosium in Dy1-x Ni (x) -Ni bilayer films is proposed. This ordering was discovered earlier by the authors when studying magnetic circular dichroism. For x exceeding a threshold value (similar to 0.05), the contribution from the Dy1-x Ni (x) layer in a bilayer film to the magnetic circular dichroism over the temperature range 80-300 K is approximately equal in magnitude to the magnetic circular dichroism observed in a single-layer Dy film at temperatures below the ferromagnetic phase transition temperature of Dy (similar to 100 K). Since magnetic circular dichroism is an effect linear in magnetization, the observed effect is associated with magnetic ordering of the Dy1-x Ni (x) layer in bilayer films due to the simultaneous influence of two factors: the incorporation of Ni into the Dy layer and the influence of the continuous Ni sublayer. The ferromagnetic ordering of a dysprosium layer doped with nickel (under conditions of an atomic contact with a continuous nickel layer) was confirmed by the field dependences of the polar and longitudinal Kerr effects. It was shown that both layers in the bilayer structure are magnetized in the same direction and characterized by an anisotropy of the easy-plane type. The magnetic ordering is assumed to be due to the change in the density of states of the Dy1-x Ni (x) alloy caused by hybridization with the narrow peaks near the Fermi level characteristic of nickel.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edelman I. S., Ovchinnikov S. G., Markov V. V., Kosyrev N. N., Seredkin V. A., Khudyakov A. E., Bondarenko G., Kesler V.
Заглавие : Room-temperature ferromagnetism in Dy films doped with Ni
Место публикации : Physica B: ELSEVIER SCIENCE BV, 2008. - Vol. 403, Is. 18. - P3295-3301. - ISSN 0921-4526, DOI 10.1016/j.physb.2008.04.018
Примечания : Cited References: 25. - The work was supported partly by the Integration Project of SB RAS (# 3.5), Program "Spintronics" of the Department of Physical Sciences of RAS, and RFBR Grant no. 07-03-00320.
Предметные рубрики: METAL NANOSCALE MULTILAYERS
EARTH
MAGNETISM
SURFACE
Ключевые слова (''Своб.индексиров.''): dy--dy-ni bi-layer films--magnetic ordering--magnetic circular dichroism--magneto-optic kerr effect--auger spectroscopy--auger spectroscopy--dy--dy-ni bi-layer films--magnetic circular dichroism--magnetic ordering--magneto-optic kerr effect--magnetic fields--nickel--bi layer films--magnetic (ce)--magneto optical--room temperature (rt) ferromagnetism--spectral dependences--magnetic field effects
Аннотация: Temperature, magnetic field and spectral dependences of magneto-optical effects (MOEs) in bi-layer films Dy(1-x)Nix-Ni and Dy(1-x)(NiFe)(x)-NiFe were investigated, x changes from 0 to 0.06. Peculiar behavior of the MOEs was revealed at temperatures essentially exceeding the Curie temperature of bulk Dy which is explained by the magnetic ordering of the Dy layer containing Ni under the action of two factors: Ni impurities distributed homogeneously over the whole Dy layer and atomic contact of this layer with continues Ni layer. The mechanism of the magnetic ordering is suggested to be associated with the change of the density of states of the alloy Dy(1-x)Nix owing to hybridization with narrow peaks near the Fermi level character for Ni. (C) 2008 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. S., Alexandrova G. A., Dolbak A. E., Pchelyakov O. P., Ol'shanetski B. Z., Ovchinnikov S. G., Kushchenkov S. A.
Заглавие : Reflection electron-energy-loss spectroscopy of FexSi1-x thin films
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 34, Is. 5. - P381-383. - ISSN 1063-7850, DOI 10.1134/S1063785008050064
Примечания : Cited References: 13. - This study was supported within the framework of the “Spintronics” Program of the Department of Physics of the Russian Academy of Sciences (project no. 2007-3-1.3-24-01-286) and the Russian Foundation for Basic Research (project no. 07-03-00320)
Предметные рубрики: SCATTERING CROSS-SECTIONS
LOSS SPECTRA
QUANTITATIVE-ANALYSIS
SURFACE
Аннотация: The values of the product of the inelastic mean free path and the differential cross section for inelastic scattering of electrons have been determined from the reflection electron-energy-loss spectra of thin films of the FexSi1-x system (0
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Osipova I. V., Vnukova N. G., Glushchenko G. A., Krylov A. S., Tomashevich E. V., Zharkov S. M., Churilov G. N.
Заглавие : Nickel-containing carbon nanotubes and nanoparticles prepared in a high-frequency arc plasma
Коллективы : Russian Foundation for Basic Research [08-08-00521]; Integrated Interdisciplinary Project of the Siberian Branch of the Russian Academy of Sciences [12, 55]
Место публикации : Phys. Solid State. - 2009. - Vol. 51, Is. 9. - P.1972-1975. - ISSN 1063-7834, DOI 10.1134/S1063783409090339
Примечания : Cited References: 6. - This study was supported in part by the Russian Foundation for Basic Research (project no. 08-08-00521) and the Integrated Interdisciplinary Project of the Siberian Branch of the Russian Academy of Sciences (project no. 12, decree no. 55).
Предметные рубрики: SURFACE
Аннотация: This paper presents the results of an investigation of nickel-containing carbon nanostructures prepared by plasma-chemical synthesis in a carbon-helium plasma jet at atmospheric pressure with the arc fed by a high-frequency current. It is demonstrated that, under these conditions, the conversion of graphite into a carbon condensate reaches 98 wt % and the contents of carbon nanotubes and nickel in this condensate are 72 and 10 wt %, respectively. Sequential treatment with nitric and hydrochloric acids has made it possible to extract purified carbon nanotubes and nickel nanoparticles coated with a carbon shell (approximately 50 nm thick) in which the nickel content is 4 wt %. Data are presented on the diameters of the prepared nanotubes and on the state of carbon in the samples.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Atuchin V. V., Gavrilova T. A., Kesler V. G., Molokeev M. S., Aleksandrov K. S.
Заглавие : Structural and electronic parameters of ferroelectric K3WO3F3
Коллективы :
Место публикации : Solid State Commun. - 2010. - Vol. 150, Is. 43-44. - P.2085-2088. - ISSN 0038-1098, DOI 10.1016/j.ssc.2010.09.023
Примечания : Cited References: 34. - This study was partly supported by RFBR (Grant 09-02-00062) and SB RAS (Grant 34).
Предметные рубрики: CORE-LEVEL SPECTROSCOPY
PHASE-TRANSITIONS
RHEED ANALYSIS
SURFACE
OXYFLUORIDE
ELPASOLITE
(NH4)(2)KWO3F3
SUBSTITUTION
TEMPERATURE
DIFFRACTION
Ключевые слова (''Своб.индексиров.''): ferroelectrics--chemical synthesis--electronic structure--photoelectron spectroscopies
Аннотация: The low-temperature ferroelectric G2 polymorph of K3WO3F3 oxyfluoride is formed by chemical synthesis. The electronic parameters of G2-K3WO3F3 have been measured by X-ray photoelectron spectroscopy under excitation with Al K alpha radiation (1486.6 eV). Detailed spectra have been recorded for all element core levels and Auger lines. The chemical bonding effects in the WO3 F-3 and WO6 octahedrons are considered by using the binding energy difference Delta BE(O-W) = BE(O 1s) BE(W 4f(7/2)). (C) 2010 Elsevier Ltd. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. S., Kushchenkov S. A., Aleksandrova G. A., Ovchinnikov S. G.
Заглавие : New Opportunities for Quantitative Analysis as Applied to Reflected Electron Energy Loss Spectroscopy of Fe/Si Structures
Разночтения заглавия :авие SCOPUS: New opportunities for quantitative analysis as applied to reflected electron energy loss spectroscopy of Fe/Si structures
Место публикации : Tech. Phys. - 2011. - Vol. 56, Is. 5. - P.656-661. - ISSN 1063-7842, DOI 10.1134/S1063784211050264
Примечания : Cited References: 14. - This work was supported by the analytical target program "Development of Scientific Potential of Higher School" (project no. 2.1.1.3656); integration project at the Siberian and Far East Branches, Russian Academy of Sciences; program "Spintronics," Department of Physical Sciences, Russian Academy of Sciences; and federal target program "Scientific and Scientific-Pedagogical Personnel of Innovative Russia 2009-2013."
Предметные рубрики: LOSS SPECTRA
SURFACE
Аннотация: The feasibility of determining the elemental composition, chemical state, and element distribution across the depth in a subsurface region using the computer simulation of the electron inelastic scattering cross section is demonstrated with iron layers on silicon substrates. Analysis is carried out based on the dielectric theory and on the experimental determination of the product of the electron inelastic mean free path by the inelastic scattering cross section from reflected electron energy loss spectra.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzubov A. A., Krasnov P. O., Kozhevnikova T. A., Popov M. N., Artyushenko P. V.
Заглавие : Peculiarities of the decoration of carbon nanotubes with transition metal atoms
Место публикации : Russ. J. Phys. Chem. B: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 5, Is. 1. - P163-167. - ISSN 1990-7931, DOI 10.1134/S1990793111010076
Примечания : Cited References: 12. - The authors thank Interdepartmental Supercomputer Center, Russian Academy of Sciences, for the possibility of using a cluster computer, and Siberian Federal University for providing a supercomputer, on which quantum-chemical calculations were performed. This work was financially supported by the Analytic Departmental Special-Purpose Program "The Development of the Scientific Potential of the Higher School (2009-2010)" (project no. 2.1.1/2584).
Предметные рубрики: INITIO MOLECULAR-DYNAMICS
SURFACE
ENERGY
Ключевые слова (''Своб.индексиров.''): carbon nanotubes--decoration--transition metal atoms--carbon nanotubes--decoration--transition metal atoms
Аннотация: Carbon nanotubes decorated with transition metal, in particular, scandium, titanium, and vanadium, atoms offer promise for use in various applied science fields. We report the results of quantum-chemical calculations of the structure of the metallic layer of atoms of these metals coating the surface of (9, 0) and (10, 0) carbon nanotubes. It was shown that uniform one-layer coating by scandium and titanium could form on nanotubes with diameters no less than the diameter of (10, 0) nanotubes. Vanadium atoms could not uniformly cover nanotubes irrespective of their diameters.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mankov Yu. I.
Заглавие : Bulk plasma waves in a randomly inhomogeneous conductor
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 7. - P.1323-1331. - ISSN 1063-7834, DOI 10.1134/S1063783412070268
Примечания : Cited References: 27
Предметные рубрики: VOLUME PLASMONS
DISPERSION
PLASMAVERLUSTES
SURFACE
Аннотация: The modification of the spectrum and damping of bulk plasma waves due to three-dimensional random inhomogeneities of the density of a degenerate electron gas in a conductor have been investigated using the averaged Green’s function method. The dependences of the frequency and damping of the averaged plasma waves, as well as the position ν m and width Δν of the peak of the imaginary part of the Fourier trans-form of the averaged Green’s function, on the wave vector k have been determined in the self-consistent approximation, which makes it possible to take into account multiple scattering of plasma waves by inhomogeneities. It has been found that, in the long-wavelength region of the spectrum, the decrease revealed in the frequency of the plasma waves is caused by the inhomogeneities, which agrees qualitatively with the behavior of the position of the peak ν m . In the range of large values of the correlation length of inhomogeneities and small values of k, the damping of the plasma waves tends to zero, whereas the width of the peak Δν remains finite, which is due to the nonuniform broadening. A comparison with the data of numerical calculations has been performed.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Krasikov A. A., Dubrovskii A. A., Semenov S. V., Bayukov O. A., Stolyar S. V., Iskhakov R. S., Ladygina V. P., Ishchenko L. A.
Заглавие : Magnetic properties and the mechanism of formation of the uncompensated magnetic moment of antiferromagnetic ferrihydrite nanoparticles of a bacterial origin
Коллективы : Ministry of Education and Science of the Russian Federation; Siberian Branch of the Russian Academy of Sciences
Место публикации : J. Exp. Theor. Phys.: Pleiades Publishing, 2014. - Vol. 119, Is. 3. - P.479-487. - ISSN 1063-7761, DOI 10.1134/S1063776114080044. - ISSN 1090-6509
Примечания : Cited References: 42. - This work was supported by the Ministry of Education and Science of the Russian Federation (state contract in 2014-2016) and a program of the Siberian Branch of the Russian Academy of Sciences.
Предметные рубрики: NIO NANOPARTICLES
EXCHANGE BIAS
HYSTERESIS ANOMALIES
FERRITIN
SURFACE
MOSSBAUER
ORDER
SIZE
Аннотация: The magnetic properties of the superparamagnetic ferrihydrite nanoparticles that form as a result of the vital activity of Klebsiella oxytoca bacteria are studied. Both an initial powder with an average number of iron atoms N Fe ∼ 2000–2500 in a particle and this powder after annealing at 140°C for 3 h in air are investigated. The following substantial modifications of the magnetic properties of the ferrihydrite nanoparticles are detected after annealing: the superparamagnetic blocking temperature increases from 23 to 49.5 K, and the average magnetic moment of a particle increases (as follows from the results of processing of magnetization curves). The particles have antiferromagnetic ordering, and the magnetic moment resulting in the superparamagnetism of the system appears due to random spin decompensation inside the particle. For this mechanism, the number of uncompensated spins is proportional to the number of magnetically active atoms raised to the one-half power, and this relation holds true for the samples under study at a good accuracy. The possible causes of the detected shift of magnetic hysteresis loops at low temperatures upon field cooling are discussed.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Varnakov S. N., Satsuk S. A., Yakovlev I. A., Ovchinnikov S. G.
Заглавие : Magnetic anisotropy in Fe films deposited on SiO2/Si(001) and Si(001) substrates
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2014. - Vol. 351. - P.104-108. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2013.09.058. - ISSN 873-4766
Примечания : Cited References: 40. - The work has been supported by RFBR Grant 11-03-00168-a, 12-02-00943-a, 13-02-01265-a, Interdisciplinary integration of fundamental research of SB RAS (2012-2014) project No. 64. Also the study was supported by The Ministry of Education and Science of Russian Federation, project 14.513.11.0016.
Предметные рубрики: UNIAXIAL ANISOTROPY
SURFACE
SILICON
ROUGHNESS
Ключевые слова (''Своб.индексиров.''): epitaxial growth--iron--magnetic anisotropy--thin film
Аннотация: The magnetic anisotropy of 10 nm iron films deposited in an ultra high vacuum on the Si(001) surface and on the Si(001) over caped by 1.5 nm layer of SiO2 was investigated. There is in-plane uniaxial magnetic anisotropy caused by oblique sputtering in the Fe films on a SiO2 buffer layer. The easy magnetization axis is always normal to the atomic flux direction but the value of the anisotropy field is different depending on the axial angle among sputtering direction and the substrate crystallographic axes. It is argued that the uniaxial magnetic anisotropy results from elongated surface roughness formation during film deposition. Several easy magnetization axes are found in Fe/Si(001) film without the SiO2 buffer layer. The mutual orientation of the main easy axes and Si crystallographic axes indicates that there is epitaxial growth of Fe/Si(001) film with the following orientation relative to the substrate: Fe[100] ?Si[110]. The anisotropy energy of Fe/Si(001) film is estimated by simulation of angle dependence of remnant magnetization m r as the sum of the mr angle plot from uniaxial anisotropy (induced by oblique deposition) and the polar plot from biaxial magnetocrystalline anisotropy. В© 2013 Elsevier B.V.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F., Gerasimov V. P., Zyryanov V. Ya.
Заглавие : Resonant angular conversion in a Fabry-Perot resonator holding a dielectric cylinder
Коллективы : RFBR [13-02-00497, 43, 101, 24.29]
Место публикации : J. Opt. Soc. Am. A: Optical Society of America, 2014. - Vol. 31, Is. 2. - P.264-267. - ISSN 1084-7529, DOI 10.1364/JOSAA.31.000264. - ISSN 1520-8532
Примечания : Cited References: 8. - This work was partially supported by RFBR grant 13-02-00497, and grants no. 43, 101 and 24.29 of SB RAS, and NSCT-SB RAS. We thank D. N. Maksimov for critical reading of the manuscript.
Предметные рубрики: SCATTERING
SURFACE
Аннотация: Light transmission through a Fabry–Perot resonator (FPR) holding a dielectric cylinder rod is considered. For the cylinder parallel to mirrors of the FPR and the mirrors mimicked by the δ functions we present an exact analytical theory. It is shown that light transmits only for resonant incident angles, αm, similar to the empty FPR. However after transmission the light scatters into different resonant angles, αm′ , performing resonant angular conversion. We compare the theory with experiment in the FPR, exploring multilayer films as the mirrors and glass cylinder with diameter coincided with the distance between the FPR mirrors. The measured values of angular light conversion agree qualitatively with the theoretical results.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Muzalevskiy K. V., Ruzhecka Z., Mironov V. L.
Заглавие : Multifrequency radiometric method of the temperature profile measurement in the active topsoil
Место публикации : Radiophys. Quantum Electron.: Springer, 2015. - Vol. 58, Is. 5. - P.339-349. - ISSN 0033-8443, DOI 10.1007/s11141-015-9608-z. - ISSN 1573-9120(eISSN)
Примечания : Cited References:17. - This work was performed within the framework of the State task No. 2.914.2014/K of the Ministry of Education and Science of the Russian Federation and Program No. II.12.1 "Radiometric and Acoustic Method of Remote Sensing of the Natural Environment" of the Siberian Branch of the Russian Academy of Sciences.
Предметные рубрики: L-BAND
MICROWAVE EMISSION
DIELECTRIC MODEL
ARCTIC SOIL
SURFACE
TUNDRA
Аннотация: In this theoretical paper, we propose a method for measuring the temperature profile in the active topsoil of the Arctic tundra using observations of the brightness temperature for two different polarizations of the radiation at frequencies of 1.4, 6.93, 7.3, and 10.7 GHz. A multifrequency physical model of microwave emission of bare soil, a dielectric model of the Arctic tundra soil, and temperature profiles, which were measured in the active topsoil at the Toolik field station on the Alaska North Slope, were used to calculate the observed values of the brightness temperature. Temperature profiles were retrieved from the observed values of the brightness temperature in the approximation of a piecewise-linear profile of topsoil temperature during 2010–2011. Correlation analysis of the temperature profiles measured at the Toolik station and retrieved from the radiometric data has shown that in winter the error of measurement of the soil temperature at depths of 0.6 and 16.0 cm in terms of the variance (correlation coefficient) does not exceed 2.3 (0.98) and 7.2 (0.62°C), respectively. In summer, the error of measurement of the soil temperature using the radiometric method is two times less than in winter.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mironov V. L., Muzalevskiy K. V., Ruzicka Z.
Заглавие : Retrieving profile temperatures in a frozen topsoil near the TFS, Alaska, based on SMOS brightness temperatures at the 1.4-GHz frequency
Коллективы : Russian Science Foundation [4-17-00656]
Место публикации : IEEE Trans. Geosci. Remote Sensing/ funding agency: IEEE-Institute Electrical and Electronics Engineers, 2016. - Vol. 54, Is. 12. - P.7331-7338. - ISSN 0196-2892, DOI 10.1109/TGRS.2016.2599272. - ISSN 1558-0644(eISSN)
Примечания : Cited References:25. - This work was supported by the Russian Science Foundation through Project 4-17-00656.
Предметные рубрики: DIELECTRIC MODEL
ARCTIC SOIL
SURFACE
BOREAL
TUNDRA
GHZ
Ключевые слова (''Своб.индексиров.''): microwave radiometry--remote sensing--soil measurements--temperature--measurement
Аннотация: In this paper, the method previously proposed in earlier work for measuring the temperature profile in a frozen topsoil using multiangular brightness temperature observations in the L-band has been experimentally tested. At a frequency of 1.4 GHz, full-polarization multiangular brightness temperature data were obtained from the Soil Moisture and Ocean Salinity (SMOS) satellite land product of Level 1C, with the SMOS footprint being centered at the Toolik Field Station (TFS), Alaska. The SMOS data covered the period from January 1, 2010 to December 31, 2011. Retrieval of the temperature profiles in a frozen topsoil was based on the semiempirical emission model L-MEB and the temperature-dependent dielectric model for an organic-rich tundra soil. The soil samples measured to develop the dielectric model were collected at the TFS site. For winter seasons, the retrieved temperature profiles in the 16.0-cm topsoil were validated relative to the temperature profiles measured in situ. As a result, the values of root-mean-square error and determination coefficient of the temperatures retrieved at the depths of 0.6, 8.7, and 16.0 cm, relative to the respective temperatures measured in situ, were found to be 2.8 °C, 4.9 °C, and 6.4 °C and 0.62, 0.42, and 0.26, respectively. The sources of error and possible improvements of the proposed retrieving algorithm were discussed. The major result of this study is the demonstration of the potential possibility for remote sensing of the temperature profile in a frozen arctic topsoil using the SMOS multiangular brightness data.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parshin A. S., Igumenov A. Y., Mikhlin Y. L., Pchelyakov O. P., Zhigalov V. S.
Заглавие : Electron spectroscopy of iron disilicide
Место публикации : Tech. Phys. - 2016. - Vol. 61, Is. 9. - P.1418-1422. - ISSN 10637842 (ISSN), DOI 10.1134/S1063784216090176
Примечания : Cited References: 33
Предметные рубрики: SCATTERING CROSS-SECTIONS
ENERGY-LOSS SPECTROSCOPY
QUANTITATIVE-ANALYSIS
LOSS SPECTRA
SURFACE
SI
HETEROSTRUCTURES
INTERFACE
PARAMETER
PHASE
Аннотация: We have reported on the results of a complex investigation of iron disilicide FeSi2 using characteristic electron energy loss spectroscopy, inelastic electron scattering cross section spectroscopy, and X-ray photoelectron spectroscopy. It has been shown that the main peak in the spectra of inelastic electron scattering for FeSi2 is a superposition of two unresolved peaks, viz., surface and bulk plasmons. An analysis of the fine structure of the spectra of inelastic electron scattering cross section by their decomposition into Lorentzlike Tougaard peaks has made it possible to quantitatively estimate the contributions of individual energy loss processes to the resulting spectrum and determine their origin and energy. © 2016, Pleiades Publishing, Ltd.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova O. S., Ivantsov R. D., Edelman I. S., Petrakovskaja E. A., Velikanov D. A., Zubavichus Y. V., Zaikovskii V .I., Stepanov S. A.
Заглавие : Identification of ε-Fe2O3 nano-phase in borate glasses doped with Fe and Gd
Место публикации : J. Magn. Magn. Mater.: Elsevier, 2016. - Vol. 401. - P.880-889. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2015.10.126
Примечания : Cited References: 40. - This work was supported partly by the Russian Foundation for Basic Research, Grants No 14-02-01211-a and by the President of Russia Grant No. NSh-2886.2014.2. Authors are grateful to G.A. Bukhtiyarova and U.N. Martyanov for the assistance in the ε-Fe2O3 nanoparticles prepared by a wet chemical pore filling impregnation method and for the discussion of the obtained results
Предметные рубрики: MAGNETIC-PROPERTIES
IRON-OXIDE
NANOPARTICLES
CERAMICS
CRYSTAL
PARTICLES
SURFACE
Ключевые слова (''Своб.индексиров.''): magnetic nanoparticles--ε-fe2o3--magnetic circular dichroism--electron magnetic resonance
Аннотация: A new type of magnetic nanoparticles was revealed in borate glasses co-doped with low contents of iron and gadolinium. Structure and magnetic properties of the particles differ essentially from that of the α-Fe2O3, γ-Fe2O3, or Fe3O4 nanoparticles which were detected earlier in similar glass matrices. Transmission electron microscopy including STEM-HAADF and EDX, synchrotron radiation-based XRD, static magnetic measurements, magnetic circular dichroism, and electron magnetic resonance studies allow referring the nanoparticles to the iron oxide phase-ε-Fe2O3. Analysis of the data set has shown that it is Gd atoms that govern the process of nanoparticles' nucleation and its incorporation into the particles in different proportions can be used to adjust their magnetic and magneto-optical characteristics. © 2015 Elsevier B.V.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Izotov A. V., Solovev P. N., Yakovlev I. A.
Заглавие : Determination of magnetic anisotropies and miscut angles in epitaxial thin films on vicinal (111) substrate by the ferromagnetic resonance
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН , Ministry of Education and Science of the Russian Federation [3.528.2014K]
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P.181-184. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.12.081. - ISSN 1873-4766(eISSN)
Примечания : Cited References:16. - This work was supported by the Ministry of Education and Science of the Russian Federation, Task no. 3.528.2014K.
Предметные рубрики: SURFACE
SPECTROMETER
SPINTRONICS
Ключевые слова (''Своб.индексиров.''): thin film--ferromagnetic resonance--magnetic anisotropy--vicinal (111)--surface--iron silicide
Аннотация: A method for determining magnetic anisotropy parameters of a thin single-crystal film on vicinal (111) substrate as well as substrate miscut angles from angular dependence of ferromagnetic resonance field has been proposed. The method is based on the following: (i) a new approach for the solution of the system of nonlinear equations for equilibrium and resonance conditions; (ii) a new expression of the objective function for the fitting problem. The study of the iron silicide films grown on vicinal Si(111) substrates with different miscut angles confirmed the efficiency of the method. The proposed method can be easily generalized to determine parameters of single-crystal films grown on substrates with an arbitrary cut.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krakhalev M. N., Rudyak, V. Yu., Gardymova A. P., Zyryanov V. Ya.
Заглавие : Toroidal Configuration of a Cholesteric Liquid Crystal in Droplets with Homeotropic Anchoring
Коллективы : Russian Science Foundation [18-72-10036]; Ministry of Education and Science of the Russian Federation [RFMEFI62117X0011]
Место публикации : JETP Letters. - 2019. - Vol. 109, Is. 7. - P.478-481. - ISSN 0021-3640, DOI 10.1134/S0021364019070075. - ISSN 1090-6487(eISSN)
Примечания : Cited References: 30. - This work was supported by the Russian Science Foundation (project no. 18-72-10036). The work was performed using the equipment of the Shared Usage Center of High-Capacity Computational Resources, Moscow State University, supported by the Ministry of Education and Science of the Russian Federation (project no. RFMEFI62117X0011).
Предметные рубрики: NEMATIC DROPLETS
SURFACE
Аннотация: Orientational structures formed in cholesteric droplets with homeotropic surface anchoring have been studied by means of polarization optical microscopy and computer simulations. It has been found that, when the ratio of the size of droplets to the pitch of a cholesteric helix ranges from 1.4 to 2.9, an axisymmetric toroidal cholesteric structure is formed with a topological linear defect in the form of an equatorially located surface ring. The features of the toroidal structure in cholesteric droplets and their optical textures for various observation schemes are examined in detail.
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