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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shaikhutdinov K. A., Balaev D. A., Popkov S. I., Petrov M. I.
Заглавие : Transport and magnetic properties of Y3/4Lu1/4Ba2Cu3O7+Y3Fe5O12 composites representing a Josephson-type superconductor-ferrimagnet-superconductor weak-link network
Разночтения заглавия :авие SCOPUS: Transport and Magnetic Properties of Y3/4Lu1/4Ba 2Cu3O7 + Y3Fe5O 12 Composites Representing a Josephson-Type Superconductor-Ferrimagnet-Superconductor Weak-Link Network
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2003. - Vol. 45, Is. 10. - P1866-1873. - ISSN 1063-7834, DOI 10.1134/1.1620087
Примечания : Cited References: 36
Предметные рубрики: RESISTIVE PROPERTIES
JUNCTION NETWORK
SYSTEM
TRANSITION
CURRENTS
VOLTAGE
STATE
FIELD
Аннотация: Y3/4Lu1/4Ba2Cu3O7 + Y3Fe5O12 composites with different volume ratios of the starting components were synthesized. The composites model an S-F-S Josephson junction network, where S stands for a superconductor and F, for a ferrimagnet. A study of the transport characteristics of the composites revealed that the temperature behavior of the electrical resistivity rho(T) below the superconducting transition point T-C is different in two regions separated by a temperature T-m. Below T-m, the current-voltage characteristics of the composites are nonlinear, while in the interval from T-C to T-m the values of rho(T) do not depend on the transport current j and magnetic field H. This behavior of rho(T, j ) and rho(T, H) is assigned to specific features of the tunneling of superconducting carriers through the ferrimagnetic layers separating HTSC grains in the composite. Magnetic measurements showed the diamagnetic response of HTSC grains to be lower in composites with a ferrimagnet. (C) 2003 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gorev M. V., Flerov I. N., Sciau P., Guillemet-Fritsch S.
Заглавие : Thermal expansion of (Ba1-x La (x) )Ti1-x/4O3 solid solutions
Коллективы : Russian Foundation for Basic Research [07-02-00069]; Russian Federation [NSh-1011.2008.2]
Разночтения заглавия :авие SCOPUS: Thermal expansion of (Ba1 - X la x )Ti 1 - X/4O3 solid solutions
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2009. - Vol. 51, Is. 4. - P790-796. - ISSN 1063-7834, DOI 10.1134/S106378340904026X
Примечания : Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (project no. 07-02-00069) and the Council on Grants from the President of the Russian Federation for the Support of Leading Scientific Schools of the Russian Federation (grant NSh-1011.2008.2).
Предметные рубрики: CERAMICS
BATIO3
BA(TI1-XZRX)O-3
FERROELECTRICS
CONDUCTIVITY
BEHAVIOR
SYSTEM
PHASE
HEAT
Аннотация: Deformation and the thermal expansion coefficient of ceramic samples of (Ba1 - x La (x) )Ti1 - x/4O3 solid solutions (x = 0, 0.026, 0.036, 0.054) were studied in the temperature range 120-700 K. Based on an analysis of the data obtained, the temperature-composition phase diagram is refined, and the temperature dependence of the polarization is calculated. The results are discussed in combination with the dielectric measurement data.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Iskhakov R. S., Zimin A. A., Filatov E. Y., Korenev S. V., Shubin Yu. V., Chizhik N. A., Yurkin G. Yu., Eremin E. V.
Заглавие : The exchange interaction effects on magnetic properties of the nanostructured CoPt particles
Место публикации : J. Magn. Magn. Mater.: Elsevier, 2016. - Vol. 401. - P.236-241. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2015.10.041
Примечания : Cited References: 55. - The work has been partially supported by RFBR Grants 15-08-06673, 14-03-00411, 14-03-00129, 15-42-0417115 and it is partly performed in Siberian Federal University within the state contract of the Russian Federation Ministry of Education and Science for 2014-2016 (project number 1792)
Предметные рубрики: CLUSTER BEAM DEPOSITION
BULK MAGNETS
NANOCRYSTALLINE FERROMAGNETS
REMANENCE ENHANCEMENT
THIN-FILMS
COERCIVITY
MICROSTRUCTURE
NANOPARTICLES
IRON
SYSTEM
Аннотация: Various manifestations of the exchange interaction effects in magnetization curves of the CoPt nanostructured particles are demonstrated and discussed. The inter-grain exchange constant A in the sponge-like agglomerates of crystallites is estimated as A=(7±1) pJ/m from the approach magnetization to saturation curves that is in good agreement with A=(6.6±0.5) pJ/m obtained from Bloch T 3/2 law. The fractal dimensionality of the exchange coupled crystallite system in the porous media of the disordered CoPt alloy d=(2.60±0.18) was estimated from the approach magnetization to saturation curve. Coercive force decreases with temperature as Hc~T 3/2 which is assumed to be a consequence of the magnetic anisotropy energy reduction due to the thermal spin wave excitations in the investigated CoPt particles. © 2015 Elsevier B.V. All rightsreserved.Демонстрируются и обсуждаются различные проявления эффектов обменного взаимодействия в кривых намагниченности наноструктуированных частиц CoPt. Межзеренная обменная константа А в агломератах губчатой структуры кристаллитов оценивается как /A/=(7±1) pJ/m из кривых приближения намагниченности к насыщению, это значение находится в хорошем согласии с /A/=(6.6±0.5) pJ/m, полученным из закона /T/. /2 Блоха. Размерность фрактала обменно-соединенных кристаллических систем в пористой среды неупорядоченного сплава CoPt /d/=(2.60±0.18) оценивалась из кривых приближения намагниченности к насыщению. Коэрцитивная сила уменьшается с температурой по закону /H_c /~/T/. /2 , который, как предполагается, есть следствие уменьшения энергии магнитной анизотропии из-за теплового возбуждения спиновых волн в изучаемых частицах CoPt.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Atuchin V. V., Bekenev V. L., Chimitova O. D., Molokeev M. S., Bazarov B. G., Bazarova J. G., Khuzhum O. Y., Lim C. S.
Заглавие : Synthesis and electronic properties of β-RbNd(MoO4)2
Место публикации : Asian J. Chem. - 2014. - Vol. 26, No. 5. - P.1284-1286. - ISSN 0970-7077, DOI 10.14233/ajchem.2014.17209
Примечания : Cited References: 26. - This study is partly supported by by the Ministry of Education and Science of the Russian Federation.
Предметные рубрики: UP-CONVERSION PHOTOLUMINESCENCE
VIBRATIONAL PROPERTIES
CRYSTAL-STRUCTURE
PARTICLES
MOLYBDATE
SPECTROSCOPY
SYSTEM
ER3+
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F.
Заглавие : Symmetry breaking in a T-shaped photonic waveguide coupled with two identical nonlinear cavities
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2011. - Vol. 84, Is. 15. - Ст.155304. - ISSN 1098-0121, DOI 10.1103/PhysRevB.84.155304
Примечания : Cited References: 40. - A.S is grateful to Boris Malomed for fruitful discussions about symmetry breaking. The work is partially supported by RFBR grant 12-02-00483.
Предметные рубрики: MODE THEORY
NUCLEAR REACTIONS
UNIFIED THEORY
SYSTEM
FIBER
RESONANCE
DYNAMICS
STATES
Аннотация: We consider light transmission in a T-shaped photonic waveguide coupled with two identical symmetrically positioned nonlinear microcavities. We present two types of symmetry breaking. The first one is a result of mixing of the symmetric input wave with antisymmetric bound states in the Fabry-Perot interferometer architecture. Similarly, the second mechanism of the symmetry breaking is the result of mixing the symmetrical input wave with the antibonding bound state in a straight waveguide coupled with two cavities positioned perpendicular to the waveguide. In both cases the mixing is due to nonlinearity. In turn, the symmetry-breaking solutions give rise to nonsymmetrical outputs in the T-shape waveguide. These effects are directly demonstrated by the electromagnetic field solutions which are complimented by coupled mode theory for the light transmission.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F.
Заглавие : Switching through symmetry breaking for transmission in a T-shaped photonic waveguide coupled with two identical nonlinear micro-cavities
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 2011. - Vol. 23, Is. 31. - Ст.315303. - ISSN 0953-8984, DOI 10.1088/0953-8984/23/31/315303
Примечания : Cited References: 32
Предметные рубрики: MODE THEORY
NUCLEAR REACTIONS
UNIFIED THEORY
FIBER
INSTABILITIES
RESONANCE
GRATINGS
SYSTEM
STATES
Ключевые слова (''Своб.индексиров.''): all-optical switching--anti-symmetric--central waveguides--coupled mode theory--input power--input pulse--mirror symmetry--nonlinear cavities--output waveguides--photonic waveguides--standing wave--symmetry-breaking--microcavities--mirrors--waveguides--light transmission
Аннотация: Using coupled mode theory we consider transmission in a T-shaped waveguide coupled with two identical symmetrically positioned nonlinear micro-cavities with mirror symmetry. For input power injected into the central waveguide we show the existence of a symmetry breaking solution which is a result of mixing of the symmetrical input wave with an antisymmetric standing wave in the Fabry-Perot interferometer. With growth of the input power, a feature in the form of loops arises in the solution which originates from bistability in the transmission in the output left/right waveguide coupled with the first/second nonlinear cavity. The domains of stability of the solution are found. The breaking of mirror symmetry gives rise to nonsymmetrical left and right outputs. We demonstrate that this phenomenon can be explored for all-optical switching of light transmission from the left output waveguide to the right one by application of input pulses.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : Switching from normal to anomalous dispersion in photonic crystal with Raman gain defect
Место публикации : Opt. Lett.: Optical Society of America, 2014. - Vol. 39, Is. 7. - P.1803-1806. - ISSN 0146-9592, DOI 10.1364/OL.39.001803. - ISSN 1539-4794
Примечания : Cited References: 30. - This work was supported in part by the RAS Grants No. 24.29 and No. 24.31, by SB RAS Grants No. 43, No. 101, and by NSC of Taiwan and SB RAS through a joint project.
Предметные рубрики: FAST LIGHT-PROPAGATION
SLOW LIGHT
SUPERLUMINALITY
AMPLIFIER
CAVITY
SYSTEM
DELAY
Аннотация: Propagation of a light through a one-dimensional photonic crystal containing a defect layer doped with a Raman gain medium is discussed. We demonstrate all-optically controlled switching from normal to anomalous dispersion in such a structure. A group delay for the transmitted probe (Raman) pulse is investigated. We show that the group velocity of a Raman pulse can be tuned from subluminal to superluminal by varying the intensity of the pump field. (C) 2014 Optical Society of America
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zeer E. P., Falaleev O. V., Ivanov Y. N., Petrakovskaya E. A.
Заглавие : Study of molecular mobility in ABF6-center-dot-6H2O crystal family
Место публикации : Fiz. Tverd. Tela. - 1994. - Vol. 36, Is. 8. - P.2210-2220. - ISSN 0367-3294
Примечания : Cited References: 21
Предметные рубрики: PHASE-TRANSITIONS
NMR
SYSTEM
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Iskhakov R. S., Ignatchenko V. A., Komogortsev S. V., Balaev A. D.
Заглавие : Study of magnetic correlations in nanostructured ferromagnets by correlation magnetometry
Место публикации : JETP Letters. - 2003. - Vol. 78, Is. 10. - P.646-650. - ISSN 0021-3640, DOI 10.1134/1.1644310
Примечания : Cited References: 20
Предметные рубрики: AMORPHOUS FERROMAGNETS
RANDOM ANISOTROPY
NANOCRYSTALLINE
SYSTEM
RIPPLE
Аннотация: We propose a theoretically justified experimental magnetometric technique for determining the size of stochastic domains spontaneously formed in the spin system of nanostructured ferromagnets and for evaluating the effective anisotropy in these magnetically correlated regions. The method is based on monitoring the DeltaM similar to H (-2) relationship in the low-field part of the integral magnetization curve. (C) 2003 MAIK "Nauka/Interperiodica".
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Altunin R. R., Moiseenko E. T., Zharkov S. M.
Заглавие : Structural phase transformations in Al/Pt bilayer thin films during the solid-state reaction
Коллективы : Russian Foundation for Basic Research [16-33-00475 mol_a]
Место публикации : Phys. Solid State. - 2018. - Vol. 60, Is. 7. - P.1413-1418. - ISSN 1063-7834, DOI 10.1134/S106378341807003X. - ISSN 1090-6460(eISSN)
Примечания : Cited References: 26. - This study was supported by the Russian Foundation for Basic Research, project no. 16-33-00475 mol_a.
Предметные рубрики: AL
SYSTEM
MULTILAYERS
ALUMINUM
HEAT
Аннотация: A sequence of phases forming during the solid-phase reaction in Al/Pt bilayer thin films has been investigated by in situ electron diffraction. It is shown that the amorphous PtAl2 phase forms first during the solid-phase reaction initiated by heating. Upon further heating, PtAl2, Pt2Al3, PtAl, and Pt3Al crystalline phases sequentially form, which is qualitatively consistent with an effective formation heat model. The content of phases forming during the reaction has been quantitatively analyzed and the structural phase transformations have been examined.
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