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1.
Morphological and magnetic
study at the
interfaces
of (fE/sI)3 multilayers [Текст] / J. Bartolome [и др.]> //
V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism : abstracts. - Vladivostok : FEFU, 2013. - P206 . - ISBN 978-5-7444-3124-2
Доп.точки доступа:
Bartolome, J.; Badía-Romano, L.; Rubin, J.; Bürgler, D. E.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Varnakov, S.N.; Варнаков, Сергей Николаевич; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; Sept. ; 15-21 ; Vladivostok)
}
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2.
Морозов, Евгений Владимирович
.
Применение ЯМР томографии для исследования межфазных границ в системах коллоидного кремнезема / Е. В. Морозов, О. В. Шабанова, О. В. Фалалеев> // Конденсир. среды и межфаз. границы. - 2012. -
Т.14
. № 1. - С. 60-69 . - ISSN 1606-867X
Перевод заглавия:
NMR imaging application for
interfaces
investigation in the colloid silica
Аннотация:
В работе представлены результаты ЯМР томографических исследований золей коллоидного кремнезема, полученных из силикатов щелочных металлов кислотным выщелачиванием. Исследована динамика времен ядерной спин-решеточной и спин-спиновой релаксации в процессе гелеобразования, а также визуализировано пространственное распределение протекающих процессов. Рассмотрена методологическая сторона проблемы обеспечения контраста на ЯМР томограммах модельных коллоидных систем при золь-гель переходе. Экспериментально продемонстрирована актуальность разработки методологии исследования межфазных границ с помощью нового для данного направления метода.
The NMR Imaging investigation results of colloid silica obtained from alkali metals silicates by acidic leaching are presented. The dynamic of nuclear spin-lattice and spin-spin relaxation times was studied during the sol-gel transfer processes and the spatial distribution of occurred processes was visualized. The methodological direction of problem associated with contrast supply on the NMR Images was examined using model colloids samples during sol-gel transfer. It was demonstrated experimentally that the development of
interfaces
investigation methodology seems to be very important for advance of NMR Imaging to this field of research.
РИНЦ
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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Шабанова, О. В.; Фалалеев, Олег Владимирович; Falaleev, O.V.; Morozov, E. V.
}
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3.
Bias-current and optically
driven transport properties of the hybrid Fe/SiO 2/p-Si structures / N. V. Volkov [et al.]> // Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. -
Vol. 190
. - P. 526-529,
DOI
10.4028/www.scientific.net/SSP.190.526 . - ISBN 1012-0394. - ISBN 9783037854365
Кл.слова (ненормированные):
Hybrid structure
--
Mis transition
--
Photoelectric effect
--
Schottky barrier
--
Channel switching
--
Comparative analysis
--
Electron hole pairs
--
Fe films
--
Fe layer
--
Ferromagnetic films
--
Hybrid structure
--
Optical effects
--
Optical radiations
--
Photogeneration
--
Planar geometries
--
Schottky barriers
--
Semiconductor substrate
--
Temperature variation
--
Critical currents
--
Interfaces
(materials)
--
Magnetic materials
--
Photoelectricity
--
Schottky barrier diodes
--
Silicon
--
Switching circuits
--
Transport properties
Аннотация:
Pronounced optical- and bias-current-sensitive features of the transport properties of a Fe/SiO 2/p-Si hybrid structure in planar geometry at temperature variation are investigated. Comparative analysis of two Fe/SiO 2/p-Si samples, one with a continuous Fe film and the other with two electrodes formed from a Fe layer and separated by a micron gap, shows that these features are due to the MIS transition with a Schottky barrier near the interface between SiO 2 and p- Si. Resistance of such a MIS transition depends exponentially on temperature and bias. In the structure with a continuous ferromagnetic film, the competition between conductivities of the MIS transition and the Fe layer results in the effect of current channel switching between the Fe layer and a semiconductor substrate. Within certain limits, this process can be controlled by a bias current and optical radiation. The mechanism of the optical effect is photogeneration of electron-hole pairs in the semiconductor substrate near its boundary with SiO 2 layer. В© (2012) Trans Tech Publications.
Scopus
Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Eremin, E. V.; Еремин, Евгений Владимирович; Tarasov, A. S.; Тарасов, Антон Сергеевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
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4.
Morozov, E. V.
NMR Imaging as a tool to study
interfaces
in colloidal and microheterogeneous systems / E. V. Morozov> // Int. symp. and summer school "Nuclear magnetic res. in condensed matter" : Book of abstracts. - СПб., 2012. - P. 50
Материалы конференции
Доп.точки доступа:
Морозов, Евгений Владимирович; Санкт-Петербургский государственный университет"Nuclear Magnetic Resonance in Condensed Matter", International symposium and summer school (NMR in Heterogeneous Systems, meeting 9th ; 2012 ; июль ; 9-13 ; Санкт-Петербург)
}
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5.
Balaev, A. D.
Implementation of the Astrov method for measuring the ME E effect with the use of a vibrating-coil magnetometer / A. D. Balaev, A. L. Freydman> // J. Surf. Invest. - 2014. -
Vol. 8
,
Is. 1
. - P. 17-19,
DOI
10.1134/S1027451014010078. - Cited References: 12 . - ISSN 1027-4510. - ISSN 1819-7094
Рубрики:
Surfaces and
Interfaces
, Thin Films
Кл.слова (ненормированные):
Ac voltage
--
External fields
--
Magnetization hysteresis
--
Repolarization
--
Temperature dependence
Аннотация:
A setup is developed for measuring the ME E effect by fixing the amplitude of magnetization oscillations upon the repolarization of a sample, caused by the application of ac voltage to the sample plates. The temperature dependence of the ME E effect in a Ga2 - xFexO3 single-crystal sample is measured in external fields from 0.25 to 1 kOe at temperatures from 77.4 to 280 K. It is established that the effect disappears when the Curie temperature is attained. The hysteresis of the magnetoelectric effect related to the magnetization hysteresis is measured. © 2014 Pleiades Publishing, Ltd.
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Публикация на русском языке
Балаев, Александр Дмитриевич. Реализация метода измерения ME E-эффекта Астрова на базе вибрационного магнитометра [Текст] / А. Д. Балаев, А. Л. Фрейдман // Поверхность. - 2014. - № 1. - С. 20-23
Доп.точки доступа:
Freydman, A. L.; Фрейдман, Александр Леонидович; Балаев, Александр Дмитриевич
}
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6.
Ignatchenko, V. A.
Spectral properties of waves in superlattices with 2D and 3D inhomogeneities / V. A. Ignatchenko, D. S. Tsikalov> // Journal of Experimental and Theoretical Physics. - 2011. -
Vol. 113
,
Is. 2
. - P. 232-244,
DOI
10.1134/S1063776111080061 . - ISSN 1063-7761
Кл.слова (ненормированные):
Analytic expressions
--
Brillouin zone boundary
--
Density of state
--
Dynamic susceptibility
--
Inhomogeneities
--
One-dimensional density
--
Optical methods
--
Optical structures
--
Peak height
--
Root mean squares
--
Spectral properties
--
Superlattice layers
--
Two phase
--
Wave numbers
--
Green's function
--
Magnetic susceptibility
--
Optical multilayers
--
Phase
interfaces
--
Three dimensional
--
Superlattices
Аннотация:
We investigate the dynamic susceptibility and one-dimensional density of states in an initially sinusoidal superlattice containing simultaneously 2D phase inhomogeneities simulating correlated rough-nesses of superlattice
interfaces
and 3D amplitude inhomogeneities of the superlattice layer materials. The analytic expression for the averaged Green's function of the sinusoidal superlattice with two phase inhomogeneities is derived in the Bourret approximation. It is shown that the effect of increasing asymmetry in the peak heights of dynamic susceptibility at the Brillouin zone boundary of the superlattice, which was discovered earlier [15] upon an increase in root-mean-square (rms) fluctuations, also takes place upon an increase in the correlation wavenumber of inhomogeneities. However, the peaks in this case also become closer, and the width and depth of the gap in the density of states decrease thereby. It is shown that the enhancement of rms fluctuations of 3D amplitude inhomogeneities in a superlattice containing 2D phase inhomogeneities suppresses the effect of dynamic susceptibility asymmetry and leads to a slight broadening of the gap in the density of states and a decrease in its depth. Targeted experiments aimed at detecting the effects studied here would facilitate the development of radio-spectroscopic and optical methods for identifying the presence of inhomogeneities of various dimensions in multilayer magnetic and optical structures. В© 2011 Pleiades Publishing, Ltd.
Scopus
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Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
}
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7.
Ignatchenko, V. A.
Spectral properties of waves in superlattices with 2D and 3D inhomogeneities / V. A. Ignatchenko, D. S. Tsikalov> // J. Exp. Theor. Phys. - 2011. -
Vol. 113
,
Is. 2
. - P. 232-244,
DOI
10.1134/S1063776111080061. - Cited References: 24. - This study was supported in part by the program of the Presidium of the Russian Academy of Sciences (grant no. 27.1), Federal Targeted Program (State contract no. 02.740.11.0220), and Targeted Programs "Development of the Higher School Scientific Potential" in 2009-2010 and 2011 years. . - ISSN 1063-7761
Рубрики:
X-RAY REFLECTION
PERTURBED FIELDS
MULTILAYERS
SUSCEPTIBILITY
PROPAGATION
INTERFACES
SCATTERING
SYSTEM
Аннотация:
We investigate the dynamic susceptibility and one-dimensional density of states in an initially sinusoidal superlattice containing simultaneously 2D phase inhomogeneities simulating correlated rough-nesses of superlattice
interfaces
and 3D amplitude inhomogeneities of the superlattice layer materials. The analytic expression for the averaged Green's function of the sinusoidal superlattice with two phase inhomogeneities is derived in the Bourret approximation. It is shown that the effect of increasing asymmetry in the peak heights of dynamic susceptibility at the Brillouin zone boundary of the superlattice, which was discovered earlier [15] upon an increase in root-mean-square (rms) fluctuations, also takes place upon an increase in the correlation wavenumber of inhomogeneities. However, the peaks in this case also become closer, and the width and depth of the gap in the density of states decrease thereby. It is shown that the enhancement of rms fluctuations of 3D amplitude inhomogeneities in a superlattice containing 2D phase inhomogeneities suppresses the effect of dynamic susceptibility asymmetry and leads to a slight broadening of the gap in the density of states and a decrease in its depth. Targeted experiments aimed at detecting the effects studied here would facilitate the development of radio-spectroscopic and optical methods for identifying the presence of inhomogeneities of various dimensions in multilayer magnetic and optical structures.
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Держатели документа:
[Ignatchenko, V. A.
Tsikalov, D. S.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
}
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8.
Morphology of the
asymmetric iron-silicon
interfaces
/ L. Badia-Romano [et al.]> // J. Alloys Compd. - 2015. -
Vol. 627
. - P. 136-145,
DOI
10.1016/j.jallcom.2014.12.019. - Cited References:69. - The financial support of the Spanish MINECO MAT2011-23791, the Presidentof Russia Grant (NSh-1044.2012.2), RFFI Grant 13-02-01265, the Ministryof Education and Science of Russian Federation (14.604.21.0002 and02G25.31.0043), Aragonese DGA-IMANA E34 (cofunded by Fondo SocialEuropeo) and that received from the European Union FEDER funds isacknowledged. L.B.R. acknowledges the Spanish MINECO FPU 2010 grant. . - ISSN 0925. - ISSN 1873-4669. -
РУБ
Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy &
Рубрики:
RAY PHOTOELECTRON-SPECTROSCOPY
ELECTRON MOSSBAUER-SPECTROSCOPY
Кл.слова (ненормированные):
Fe/Si nanolayers
--
Interfaces
--
Fe silicides
--
Compositional depth
--
HAXPES
--
CEMS
Аннотация:
A systematic study of the iron–silicon
interfaces
formed upon preparation of (Fe/Si) multilayers has been performed by combination of modern and powerful techniques. Samples were prepared by thermal evaporation under ultrahigh vacuum onto a Si(1 0 0) substrate. The morphology of these films and their
interfaces
was studied by a combination of scanning transmission electron microscopy, X-ray reflectivity, angle resolved X-ray photoelectron spectroscopy and hard X-ray photoelectron spectroscopy. The Si-on-Fe interface thickness and roughness were determined to be 1.4(1) nm and 0.6(1) nm, respectively. Moreover, determination of the stable phases formed at both Fe-on-Si and Si-on-Fe
interfaces
was performed using conversion electron Mössbauer spectroscopy on multilayers with well separated Si-on-Fe and Fe-on-Si
interfaces
. It is shown that while a fraction of Fe remains as α-Fe, the rest has reacted with Si, forming the paramagnetic c-Fe1−xSi phase and a ferromagnetic Fe rich silicide (DO3 type phase). We conclude that the paramagnetic c-Fe1−xSi silicide sublayer is identical in both Si-on-Fe and Fe-on-Si
interfaces
, whereas an asymmetry is revealed in the composition of the ferromagnetic silicide sublayer.
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Держатели документа:
Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain
Univ Zaragoza, Dept Ciencia Mat & Ingn Met, E-50018 Zaragoza, Spain
Univ Zaragoza, INA, LMA, E-50018 Zaragoza, Spain
Fdn ARAID, E-50004 Zaragoza, Spain
Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
Siberian Aerosp Univ, Krasnoyarsk 660014, Russia
ESRF, SpLine Spanish CRG, F-38043 Grenoble, France
CSIC, Inst Ciencia Mat Madrid, Madrid, Spain
Доп.точки доступа:
Badía-Romano, L.; Rubin, J.; Bartolomé, F.; Magen, C.; Bartolome, J.; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Rubio-Zuazo, J.; Castro, G.R.
}
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9.
On the possibility
of contact-induced spin polarization in
interfaces
of armchair nanotubes with transition metal substrates / A. A. Kuzubov [et al.]> // J. Magn. Magn. Mater. - 2015. -
Vol. 396
. - P. 102-105,
DOI
10.1016/j.jmmm.2015.08.037. - Cited References: 24. - This work was supported by the government contract of The Ministry of Education and Science of the Russian Federation to Siberian Federal University (Grant no. 161500.2014/K). The authors would like to thank Institute of Computational Modeling of SB RAS, Krasnoyarsk; Joint Supercomputer Center of RAS, Moscow; Center of Equipment for Joint Use of Siberian Federal University, Krasnoyarsk: and Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk for providing the access to their supercomputers. . - ISSN 0304-8853
РУБ
Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
INITIO MOLECULAR-DYNAMICS
TOTAL-ENERGY CALCULATIONS
AUGMENTED-WAVE METHOD
CARBON NANOTUBES
BASIS-SET
1ST-PRINCIPLES
SURFACES
Кл.слова (ненормированные):
Nanotubes
--
Cobalt
--
Nickel
--
Spin polarization
--
DFT
Аннотация:
The interaction between armchair carbon and boron nitride nanotubes (NT) with ferromagnetic transition metal (TM) surfaces, namely, Ni(111) and Co(0001), was studied by means of density functional theory. Different configurations of composite compartments mutual arrangement were considered. Partial densities of states and spin density spatial distribution of optimized structures were investigated. Influence of ferromagnetic substrate on nanotubes' electronic properties was discussed. The values of spin polarization magnitude at the Fermi level are also presented and confirm the patterns of spin density spatial distribution. © 2015 Elsevier B.V. All rights reserved.
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Держатели документа:
Department of Chemistry, Siberian Federal University, 79 Svobodny Prospect, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, 50 Akademgorodok, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Kovaleva, E. A.; Ковалева, Евгения Андреевна; Tomilin, F. N.; Томилин, Феликс Николаевич; Mikhaleva, N. S.; Михалева, Наталья Сергеевна; Kuklin, A. V.; Куклин, Артем Валентинович
}
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10.
Structure and composition
of Fe-Si
interfaces
in (Fe/Si)3 multilayer nanostructures / J. Bartolomé [et al.]> //
Third Asian school-conference on physics and technology of nanostructured materials (ASCO-NANOMAT 2015) : proceedings. - Vladivostok : Dalnauka, 2015. - Ст. PS.20.02i. - P. 18-19 . - ISBN 978-5-8044-1556-4
Материалы конференции
,
Материалы конференции
Доп.точки доступа:
Bartolomé, J.; Badía-Romano, L.; Rubín, J. ; Magén, C.; Bürgler, D. E.; Rubio-Zuazo, J.; Castro, G. R. ; Varnakov, S. N.; Варнаков, Сергей Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Belyaev, B. A.; Беляев, Борис Афанасьевич; Lyashchenko, S. A.; Лященко, Сергей Александрович; Platunov, M. S.; Платунов, Михаил Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Asian School-Conference on Physics and Technology of Nanostructured Materials(3 ; 2015 ; Aug. ; 19-26 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(3 ; 2015 ; авг. ; 19-26 ; Владивосток)
}
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11.
Composition and morphology
of Fe-Si
interfaces
and (Fe/Si)3 multilayer nanostructures / J. Bartolomé [и др.]> //
20th Int. Conf. on Magnetism (ICM-2015) : book of abstracts. - 2015. - Ст. WE.J.2_I1
Материалы конференции
Доп.точки доступа:
Bartolomé, J.; Badía-Romano, L.; Rubín, J. ; Bartolomé, F.; Magén, C.; Bürgler, D. E.; Rubio-Zuazo, J.; Castro, G. R. ; Varnakov, S. N.; Варнаков, Сергей Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Platunov, M. S.; Платунов, Михаил Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; International Conference on Magnetism(20 ; 2015 ; Jul ; 5-10 ; Barselona, Spain)
}
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12.
Pressure-stimulated synthesis and
luminescence properties of microcrystalline (Lu,Y)3Al5O12:Ce3+ garnet phosphors / V. V. Atuchin [et al.]> // ACS Appl. Mater.
Interfaces
. - 2015. -
Vol. 7
,
Is. 47
. - P. 26235-26243,
DOI
10.1021/acsami.5b08411. - Cited References: 75. - This work was partly supported by the National Natural Science Foundations of China (Grant Nos. 51272242 and 51511130035) and the Russian Foundation for Basic Research (Grant No. 15-52-53080 GFEN_a). V.V.A. was partly supported by the Ministry of Education and Science of the Russian Federation . - ISSN 1944-8244
Перевод заглавия:
Синтез стимулированный давлением и люминесцентные свойства микрокристаллических гранатов (Lu,Y)3Al5O12:Ce3+
РУБ
Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
LASER MASS-SPECTROMETRY
LIGHT-EMITTING-DIODES
WHITE-LIGHT
SINGLE-CRYSTALS
OPTICAL-PROPERTIES
ELECTRONIC-STRUCTURE
VIBRATIONAL PROPERTIES
PHASE-TRANSITIONS
PARTICLE-SIZE
GROWTH
Кл.слова (ненормированные):
synthesis
--
pressure
--
garnet
--
structure
--
luminescence
--
phosphor
Аннотация:
The Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 phosphors were synthesized by solid state reaction at temperature 1623 K and pressure 1.5 × 107 Pa in (95% N2 + 5% H2) atmosphere. Under the conditions, the compounds crystallize in the form of isolated euhedral partly faceted microcrystals ∼19 μm in size. The crystal structures of the Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 garnets have been obtained by Rietveld analysis. The photoluminescence (PL) and X-ray excited luminescence (XL) spectra obtained at room temperature indicate broad asymmetric bands with maxima near 519 and 540 nm for Y2.99Ce0.01Al5O12 and Lu2.98Ce0.01Y0.01Al5O12, respectively. The light source was fabricated using the powder Lu2.98Ce0.01Y0.01Al5O12 phosphor and commercial blue-emitting n-UV LED chips (λex = 450 nm). It is found that the CIE chromaticity coordinates are (x = 0.388, y = 0.563) with the warm white light emission correlated color temperature (CCT) of 6400 K and good luminous efficiency of 110 lm/W. © 2015 American Chemical Society.
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Держатели документа:
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation
Analytical Laboratory, Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russian Federation
Department of Applied Physics, Novosibirsk State University, Novosibirsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Laboratory of High Pressure Minerals and Diamond Deposits, Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Доп.точки доступа:
Atuchin, V. V.; Beisel, N. F.; Galashov, E. N.; Mandrik, E. M.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yelisseyev, A. P.; Yusuf, A. A.; Xia, Z.
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13.
Magnetic properties, morphology
and
interfaces
of (Fe/Si)n nanostructures / Bartolome J. [et al.]> //
J. Magn. Magn. Mater. - 2016. -
Vol. 400
. - P. 271-275,
DOI
10.1016/j.jmmm.2015.07.046. - Cited References: 43. - The financial support of the Spanish MINECOMAT2011-23791 and MAT2015-53921-R, Aragonese DGA-IMANAE34 (cofounded by Fondo Social Europeo) and European FEDER funds is acknowledged. Program of the President of the Russian Federation for the support of leading scientific schools (Scientific School 2886.2014.2), RFBR (Grant no. 13-02-01265), the Ministry of Education and Science of the Russian Federation (State contract no. 02.G25.31.0043 and State task no. 16.663.2014К) . - ISSN 0304-8853
РУБ
Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
INTERLAYER EXCHANGE
Fe/Si(100) INTERFACE
SILICIDE FORMATION
ULTRAHIGH-VACUUM
FILMS
IRON
MAGNETORESISTANCE
SUPERLATTICES
SPECTROSCOPY
DEPOSITION
Аннотация:
A systematic study of the iron–silicon
interfaces
formed upon preparation of (Fe/Si) multilayers has been performed by the combination of modern and powerful techniques. Samples were prepared by molecular beam epitaxy under ultrahigh vacuum onto Si wafers or single crystalline Ag(100) buffer layers grown on GaAs(100). The morphology of these films and their
interfaces
was studied by a combination of scanning transmission electron microscopy, X-ray reflectivity, angle resolved X-ray photoelectron spectroscopy and hard X-ray photoelectron spectroscopy. The Si-on-Fe interface thickness and roughness were determined to be 1.4(1) nm and 0.6(1) nm, respectively. Moreover, determination of the stable phases formed at both Fe-on-Si and Si-on-Fe
interfaces
was performed using conversion electron Mössbauer spectroscopy on multilayers with well separated Si-on-Fe and Fe-on-Si
interfaces
. It is shown that while a fraction of Fe remains as α-Fe, the rest has reacted with Si, forming the paramagnetic FeSi phase and a ferromagnetic Fe rich silicide. We conclude that there is an identical paramagnetic c-Fe1−xSi silicide sublayer in both Si-on-Fe and Fe-on-Si
interfaces
, whereas an asymmetry is revealed in the composition of the ferromagnetic silicide sublayer.
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Доп.точки доступа:
Bartolome, J.; Badía-Romano, L.; Rubin J.; Bartolome F.; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Burgler D.E.; International Conference on Magnetism(20 ; 2015 ; Jul ; 5-10 ; Barselona, Spain)
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14.
Mankov, Y. I.
High-frequency susceptibility of a multilayered ferromagnetic system with two-dimensional inhomogeneities / Y. I. Mankov, D. S. Tsikalov> // Phys. Solid State. - 2010. -
Vol. 52
,
Is. 3
. - P. 544-553,
DOI
10.1134/S1063783410030157. - Cited References: 24. - This study was supported in part by the Council on Grants from the President of the Russian Federation for the State Support of Scientific Investigations performed by the Leading Scientific Schools (grant no. 3818.2008.3), the Presidium of the Russian Academy of Sciences (Program no. 27.1), and the Ministry of Education and Science within the framework of the Federal Program (State Contract no. 2.740.11.0220). . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
SPIN-WAVE SUSCEPTIBILITY
SPECTRUM
SUPERLATTICES
INTERFACES
Аннотация:
This paper reports on the results of the investigation of the high-frequency susceptibility of a layered ferromagnetic structure in which, apart from a periodic change in the magnetic anisotropy parameter from layer to layer, this parameter varies along layers according to a random law (the superlattice with two-dimensional phase inhomogeneities). The evolution of the frequency dependence of the imaginary part of the averaged Green's function in the range of the energy gap (band gap) in the spectrum of waves propagating along the superlattice axis due to the change in the relative root-mean-square fluctuations of the phase gamma 2 has been studied at the boundaries of the odd Brillouin zones. It has been found that, for all odd Brillouin zones, the imaginary part of the Green's function exhibits a universal behavior: the peak corresponding to the edge of the band gap with a lower frequency remains unchanged, and the peak corresponding to the edge of the band gap with a higher frequency is smoothed with an increase in the quantity gamma(2). These effects, which were initially revealed at the boundary of the first Brillouin zone of the sinusoidal superlattice, have been explained, as before, by the specific features of the energy conservation laws for the incident and scattered waves in the lattice with two-dimensional inhomogeneities. It has been demonstrated that an increase in the Brillouin zone number leads to a decrease in the value of gamma(2) at which the peak at the edge of the band gap with a higher frequency disappears.
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Держатели документа:
[Mankov, Yu. I.
Tsikalov, D. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Mankov, Yu. I.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, pr. Svobodny 79, Krasnoyarsk 660041, Russian Federation
Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич
}
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15.
Magnetic properties and
nonmagnetic phases formation in (Fe/Si)(n) films / S. N. Varnakov [et al.]> // J. Appl. Phys. - 2008. -
Vol. 104
,
Is. 9
. - Ст. 94703,
DOI
10.1063/1.3005973. - Cited References: 23. - This work was supported by the Russian Academy of Science program "Spintronics," the complex integration project of the Siberian Branch of the Russian Academy of Science. 3.5, the Russian Foundation for Basic Research (Grant No. 07-03-00320), the "Ramon y Cajal" program, and Project No. MAT 2005/01272 of the Spanish Ministry of Education and Science. . - ISSN 0021-8979
РУБ
Physics, Applied
Рубрики:
FE/SI/FE TRILAYER FILMS
GIANT MAGNETORESISTANCE
ULTRAHIGH-VACUUM
SUPERLATTICES
MULTILAYERS
EXCHANGE
Кл.слова (ненормированные):
Activation energy
--
Integral equations
--
Magnetic properties
--
Magnetization
--
Magnets
--
Multilayers
--
Rate constants
--
Silicon
--
Thermal evaporation
--
Vacuum
--
Vacuum evaporation
--
Fe layers
--
High temperatures
--
Interface layers
--
Irreversible behaviors
--
Kinetic equations
--
N films
--
Nonmagnetic
--
Nonmagnetic phases
--
Prefactor
--
Quantitative analysis
--
Rate equations
--
Synthetic procedures
--
Temperature dependences
--
Ultrahigh-vacuum systems
--
Phase
interfaces
Аннотация:
The magnetization of Fe/Si multilayers, grown by thermal evaporation in an ultrahigh vacuum system, was investigated at high temperatures. Magnetization and its temperature dependence up to a high temperature of 800 K depend on individual Fe layer thickness d(Fe). This dependence is the result of the formation of an Fe-Si interface layer (nonmagnetic phase) during the synthetic procedure. The fraction of this Fe-Si nonmagnetic phase is estimated versus dFe. At temperatures higher than 400 K an irreversible decrease in the magnetization occurs. A quantitative analysis of this irreversible behavior is proposed in terms of an exponential diffusion-like kinetic equation for the reaction that produces the Fe-Si nonmagnetic phase. The coefficients of the rate equation are the activation energy E(a) and the prefactor D(0), which have been determined for different d(Fe). (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3005973]
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Держатели документа:
[Varnakov, S. N.
Komogortsev, S. V.
Ovchinnikov, S. G.] Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
[Varnakov, S. N.] Siberian Aerosp Univ, Krasnoyarsk 660014, Russia
[Bartolome, J.] Univ Zaragoza, Inst Ciencia Mat Aragon, Dept Fis Mat Condensada, CSIC, E-50009 Zaragoza, Spain
[Sese, J.] Univ Zaragoza, Inst Nanociencia Aragon, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Aerospace University, pr. im. gazety Krasnoyarskii rabochii 31, Krasnoyarsk 660014, Russian Federation
Instituto de Ciencia de Materiales de Aragon, Departamento de Fisica de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
Instituto de Nanociencia de Aragon, Departamento de Fisica de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
Доп.точки доступа:
Varnakov, S. N.; Варнаков, Сергей Николаевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Bartolome, J.; Sese, J.
}
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16.
Ignatchenko, V. A.
High-Frequency Susceptibility of a Superlattice with 2D Inhomogeneities / V. A. Ignatchenko, Y. I. Mankov, D. S. Tsikalov> // J. Exp. Theor. Phys. - 2008. -
Vol. 107
,
Is. 4
. - P. 603-611,
DOI
10.1134/S1063776108100075. - Cited References: 26. - This work was supported in part by grant no. 3818.2008.3 from the President of Russia in accordance with the program supporting leading scientific schools. . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
SPIN-WAVE SUSCEPTIBILITY
PERIODIC MULTILAYERS
LOCALIZATION
SYSTEMS
SPECTRUM
DISORDER
MEDIA
Кл.слова (ненормированные):
Energy conservation
--
Energy gap
--
Energy management
--
Frequency bands
--
Gallium alloys
--
Green's function
--
Probability density function
--
Three dimensional
--
Band gaps
--
Energy conservation laws
--
Green functions
--
High frequencies
--
Imaginary parts
--
Magnon crystals
--
Scattered waves
--
Superlattice layers
--
Wave spectrums
--
Phase
interfaces
Аннотация:
We investigate the high-frequency susceptibility (Green function) of an initially sinusoidal 1D superlattice with 2D phase inhomogeneities that model the deformations of the
interfaces
between the superlattice layers. For waves propagating along the superlattice axis ( the geometry of a photon or magnon crystal), we have found a peculiar behavior of the imaginary part of the Green function that consists in a significant difference between the peaks corresponding to the edges of the band gap in the wave spectrum. The peak corresponding to the lower-frequency band edge remains essentially unchanged as the root-mean-square fluctuation of the 2D inhomogeneities. 2 increases, while the peak corresponding to the higher-frequency band edge broaden and decreases sharply in height until its complete disappearance with increasing gamma(2). This behavior of the peaks corresponds to a band gap closure mechanism that differs from the traditional one characteristic of 1D and 3D inhomogeneities. These effects can be explained by a peculiarity of the energy conservation laws for the incident and scattered waves for 2D inhomogeneities in a 1D superlattice.
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Держатели документа:
[Ignatchenko, V. A.
Mankov, Yu. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Mankov, Yu. I.
Tsikalov, D. S.] Siberian Fed Univ, Krasnoyarsk 660062, Russia
ИФ СО РАН
L.V. Kirenskii Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660062, Russian Federation
Доп.точки доступа:
Mankov, Y. I.; Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
}
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17.
Magnetic properties of
the mixed-valence manganese oxide Pb(3)Mn(7)O(15) / N. V. Volkov [et al.]> // J. Phys.: Condens. Matter. - 2008. -
Vol. 20
,
Is. 5
. - Ст. 55217,
DOI
10.1088/0953-8984/20/5/055217. - Cited References: 16 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
CRYSTAL-STRUCTURE
PHASE-SEPARATION
Кл.слова (ненормированные):
Crystal structure
--
Magnetization
--
Manganese compounds
--
Phase
interfaces
--
X ray diffraction
--
Manganese oxide
--
Space groups
--
Temperature range
--
Single crystals
Аннотация:
A Pb(3)Mn(7)O(15) single crystal has been grown by the flux method and studied using x-ray diffraction and magnetization measurements. The crystal is hexagonal (P6(3)/mcm space group, Z = 4) and exhibits a pronounced layered nature. Along the [001] direction (c axis), the structure consists of layers of edge-sharing MnO(6) octahedra. Pairs of Mn atoms occupy the octahedral sites located between layers forming 'bridges' along the c axis, which link neighboring Mn layers. The magnetic properties of the crystal have been investigated using ac and dc magnetization measurements in the temperature range 2-900 K at magnetic fields up to 90 kOe. The experimental data obtained suggest that in the temperature region under study several different magnetic phases can be distinguished. Down to similar to 250 K, the crystal is in the paramagnetic state. Below this temperature, short-range antiferromagnetic ordering apparently starts forming within Mn layers, although a transition to long-range magnetic order occurs at 70 K. The magnetization data obtained leads us to conclude that this state is canted antiferromagnetic with moments lying in the basal plane of the crystal. In addition, below 20 K the crystal undergoes one more magnetic transition that corresponds to spin reorientation.
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Держатели документа:
[Volkov, N. V.
Sablina, K. A.
Bayukov, O. A.
Eremin, E. V.
Petrakovskii, G. A.
Velikanov, D. A.
Balaev, A. D.
Bovina, A. F.] RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Volkov, N. V.
Petrakovskii, G. A.] Siberian Fed Univ, Dept Phys, Krasnoyarsk 660036, Russia
[Boeni, P.] Tech Univ Munich, Dept Phys E21, D-85747 Garching, Germany
[Clementyev, E.] RFNC Inst Tech Phys, Snezhinsk 456770, Russia
ИФ СО РАН
Kirensky Institute of Physics SB RAS, 660036 Krasnoyarsk, Russian Federation
Department of Physics, Siberian Federal University, 660041 Krasnoyarsk, Russian Federation
Physics-Department E21, Technical University of Munich, D-85747, Garching, Germany
RFNC-Institute of Technical Physics, 456770 Snezhinsk, Russian Federation
Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Sablina, K. A.; Саблина, Клара Александровна; Bayukov, O. A.; Баюков, Олег Артемьевич; Eremin, E. V.; Еремин, Евгений Владимирович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Balaev, A. D.; Балаев, Александр Дмитриевич; Bovina, A. F.; Бовина, Ася Федоровна; Boni, P.; Clementyev, E.
}
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18.
The effect of
paramagnetic impurities in normal metal on the critical current in a network of S-N-S Josephson junctions in bulk Y3/4Lu1/4Ba2Cu3O7+BaPb(1-x)Fe(x)O(3)composites / D. A. Balaev [et al.]> // Supercond. Sci. Technol. - 2003. -
Vol. 16
,
Is. 1
. - P. 60-64,
DOI
10.1088/0953-2048/16/1/311. - Cited References: 41 . - ISSN 0953-2048
РУБ
Physics, Applied + Physics, Condensed Matter
Рубрики:
CURRENT-VOLTAGE CHARACTERISTICS
WEAK LINKS
RESISTIVE PROPERTIES
MAGNETIC-IMPURITIES
EXCHANGE FIELD
SNS JUNCTIONS
F-S
COMPOSITES
SUPERCONDUCTOR
SCATTERING
Кл.слова (ненормированные):
Critical currents
--
Interfaces
(materials)
--
Josephson junction devices
--
Paramagnetism
--
Transport properties
--
Non-superconducting ingredient
--
Paramagnetic impurities
--
Superconductor normal metal superconductor
--
Oxide superconductors
Аннотация:
Bulk Y3/4Lu1/4Ba2Cu3O7 + BaPb1-xFexO3 composites representing a model of a network of superconductor-normal metal-superconductor (SNS) Josephson junctions with paramagnetic impurities (Fe) in the N layers have been prepared. The transport properties of the composites have been studied. An exponential decay of the critical current with increasing Fe content in the non-superconducting ingredient of the composite has been observed. Such a behaviour is accounted for in terms of the de Gennes proximity effect theory.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Petrov, M. I.; Петров, Михаил Иванович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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19.
Composite materials on
high-T-c superconductors and BaPbO3, Ag basis / A. G. Mamalis [et al.]> //
Physica C. - 2001. -
Vol. 364
. - P. 174-177,
DOI
10.1016/S0921-4534(01)00749-3. - Cited References: 9 . - ISSN 0921-4534
РУБ
Physics, Applied
Кл.слова (ненормированные):
composite high-T-c superconductors
--
superconducting fault current limiter
--
Composite high-Tc superconductors
--
Superconducting fault current limiter
--
Composite materials
--
Electric fault currents
--
Interfaces
(materials)
--
Magnetic variables measurement
--
Mathematical models
--
Scanning electron microscopy
--
Spectrometry
--
Superconducting transition temperature
--
Superconductivity
--
X ray diffraction analysis
--
Solid state reactions
--
High temperature superconductors
Аннотация:
The preparation., processing and characterization of the composite materials on high-T-c superconductor (HTSC) basis, YBa2Cu3O7/Ag and Y0.75Lu0.25Ba2Cu3O7/BaPbO3, is reported. The initial components YBa2Cu3O7 and BaPbO3 were prepared by the standard solid state reaction technique. The microstructures of the samples were observed by scanning electron microscopy. whilst the XRD paterns of the composites HTSC+Ag and HTSC+BaPbO3 revealed the 123 superconducting phase and the Ag or BaPbO3 structure. The chemical compositions of the powders and the interface zone were found by employing energy dispersive spectrometry. The resistive and magnetic measurements of the composites indicated the transition temperature 93.5 K. Application of such composite materials in the construction of a superconducting fault current limiter model is reported. (C) 2001 Elsevier Science B.V. All rights reserved.
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Держатели документа:
Natl Tech Univ Athens, Dept Mech Engn, Mfg Technol Div, Athens 10682, Greece
Russian Acad Sci, Kiensky Inst Phys, Krasnoyarsk, Russia
ИФ СО РАН
Manufacturing Technology Division, Department of Mechanical Engineering, National Technical University of Athens, 42, 28th October Ave., 10682 Athens, Greece
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Mamalis, A. G.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaihutdinov, K. A.; Gohfeld, D. M.; Kharlamova, S. A.; Vottea, I. N.; International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials(3 ; 2001 ; Jan. 15-19 ; Honolulu, Hawaii)
}
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20.
Ignatchenko, V. A.
Wave spectrum of multilayers with finite thicknesses of
interfaces
/ V. A. Ignatchenko, Y. I. Mankov, A. A. Maradudin> // Phys. Rev. B. - 2000. -
Vol. 62
,
Is. 3
. - P. 2181-2184,
DOI
10.1103/PhysRevB.62.2181. - Cited References: 24 . - ISSN 0163-1829
РУБ
Physics, Condensed Matter
Рубрики:
SPIN
EXCITATIONS
MEDIA
Аннотация:
To describe a multilayer structure with arbitrary thicknesses of the
interfaces
between layers, we introduce a model in which the dependence of a material parameter along the axis of such a superlattice is described by a Jacobian elliptic sine function. Depending on the value of the modulus kappa of the elliptic function, the model describes the limiting cases of multilayers with sharp
interfaces
(kappa=1, d/l=0, where d is the thickness of the interface, l is the period of the superlattice) and of sinusoidal superlattices (kappa=0, d/l=1/4), as Well as all intermediate situations. We investigate the wave spectrum in such a superlattice. The dependences of the widths of the gaps in the spectrum at the boundaries of ail odd Brillouin zones on the ratio d/l are found. It is shown that the thicknesses of the
interfaces
can be determined if the experimental value of the relation between the widths of the first gap Delta v(1) and any other gap Delta v(n) is known.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
ИФ СО РАН
Доп.точки доступа:
Mankov, Y. I.; Maradudin, A. A.; Игнатченко, Вальтер Алексеевич
}
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