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Вид документа : Однотомное издание
Шифр издания :
Заглавие : 50 лет Институту физики им. Л. В. Киренского Сибирского отделения Российской академии наук
Выходные данные : Красноярск: ИФ СО РАН, 2006
Колич.характеристики :258 с.: ил., фото
Коллективы : Российская академия наук, Сибирское отделение РАН, Институт физики им. Л.В. Киренского Сибирского отделения РАН :
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Shaikhutdinov K. A., Aleksandrov K. S.
Заглавие : A comparative study of transport properties of composites HTSC+MgTiO3 and HTSC + NiTiO3. The effect of paramagnetic NiTiO3
Коллективы : International conference on materials and mechanisms of superconductivity high temperature superconductors
Место публикации : Physica C-Superconductivity and its Applications. - 2000. - Vol. 341-348, Pt. 3. - P.1863-1864. - ISSN 0921-4534, DOI 10.1016/S0921-4534(00)01217-X
Ключевые слова (''Своб.индексиров.''): composite materials--copper oxides--josephson junction devices--magnesium compounds--nickel compounds--paramagnetism--superconductivity--thermal effects--transport properties--yttrium compounds--abrikosov vortices flow--superconductor insulator superconductor junction--thermally activated phase slippage--high temperature superconductors
Аннотация: Bulk composites Y3/4Lu1/4Ba2Cu3O7+NiTiO3 and Y3/4Lu1/4Ba2Cu3O7+MgTiO3 with insulator volume content 7.5% and 15% modelling a network of Superconductor-Insulator-Superconductor (S-I-S) junctions have been prepared. The ?(T) dependences of composites HTSC+MgTiO3 are described well by the mechanism of Thermally Activated Phase Slippage (TAPS). The anomalous behavior of resistivity ?(T) of HTSC+NiTiO3 composites manifesting as a kink on ?(T) curves at some temperature Tm have been observed. In the temperature range Tm < T < TC the dissipation is Ohmic while below Tm the CVCs are strongly non-linear. This peculiarity is interpreted as arisen owing to Abrikosov vortices flow.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Kirko V. I., Mamalis A. G., Petrov M. I., Ivanov V. V., Balaev D. A., Gokhfel'd D. M., Kharlamova S. A., Militsyn S. V., Shaikhutdinov K. A.
Заглавие : A new concept for a current switch based on a high-temperature superconductor
Место публикации : Tech. Phys.: AMER INST PHYSICS, 2001. - Vol. 46, Is. 10. - P1299-1302. - ISSN 1063-7842, DOI 10.1134/1.1412067
Примечания : Cited References: 14
Предметные рубрики: CURRENT LIMITER
Аннотация: A new concept for a device for protecting an alternating-current network is offered. It is based on a combination of a superconducting limiter of a short-circuit current and a circuit breaker. A high-temperature superconductor in the form of a pile of plane rings is used as the active element of the limiter. The test results of a model of such a limiter are obtained in the steady-state short-circuit regime. The characteristics of composite silverless materials used for design of the breaker are given. (C) 2001 MAIK "Nauka/Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Gokhfel'd D. M., Shaikhutdinov K. A.
Заглавие : Andreev reflection in natural grain boundaries of polycrystalline high-T-c superconductor La1.85Sr0.15CuO4
Разночтения заглавия :авие SCOPUS: Andreev reflection in natural grain boundaries of polycrystalline high-Tc superconductor La1.85Sr0.15CuO 4
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2003. - Vol. 45, Is. 7. - P1219-1222. - ISSN 1063-7834, DOI 10.1134/1.1594233
Примечания : Cited References: 30
Предметные рубрики: CURRENT-VOLTAGE CHARACTERISTICS
WEAK LINKS
CHARGE-TRANSPORT
JUNCTIONS
CONDUCTIVITY
HYSTERESIS
COMPOSITES
SCATTERING
Аннотация: The temperature evolution of the current-voltage characteristic (CVC) of a "break junction" with metal-type conductivity on the polycrystalline La1.85Sr0.15CuO4 high-temperature superconductor is investigated. The CVC exhibits gap peculiarities and hysteresis, which is observed in the region of negative differential resistance. The experimental results are described well in terms of the Kummel-Gunsenheimer-Nicolsky theory for an S-N-S junction (S is a superconductor, N is a normal metal) this theory takes into account multiple Andreev reflection of quasiparticles. It is shown that the shape of the CVC and the existence and the shape of hysteresis are determined by the ratio of "long" and "short" grain boundaries in the polycrystal under investigation. (C) 2003 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Prus A. G., Shaikhutdinov K. A., Petrov M. I.
Заглавие : Angular dependence of the magnetoresistance in Y3/4Lu1/4Ba2Cu3O7-CuO composites at 77 K
Разночтения заглавия :авие SCOPUS: Angular dependence of the magnetoresistance in Y3/4Lu 1/4Ba2Cu3O7-CuO composites at 77 K
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2006. - Vol. 32, Is. 8. - P677-679. - ISSN 1063-7850, DOI 10.1134/S1063785006080128
Примечания : Cited References: 16
Предметные рубрики: CERAMIC SUPERCONDUCTORS
MAGNETIC-FIELD
MICROSTRUCTURE
BOUNDARIES
TRANSPORT
MOTION
FILMS
Аннотация: The angular dependence of the magnetoresistance of polycrystalline Y3/4Lu1/4Ba2Cu3O7-CuO composites has been studied. These composites represent a system of Josephson junctions and exhibit a large magnetoresistance at 77 K. In addition to the isotropic component, there is the angle-dependent component proportional to sin(2)theta, where theta is the angle between the directions of current and magnetic field. This behavior is unambiguous evidence for the process of flux flow in the Josephson medium realized in the composites.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Orlov Yu. S., Dudnikov V. A., Kazak N. V., Shaikhutdinov K. A.
Заглавие : Anomalous structural, magnetic, optical and electronic properties of GdCoO3-y
Коллективы : International Conference on Magnetism
Место публикации : 20th Int. Сonf. on Magnetism (ICM-2015): book of abstracts. - 2015. - Ст.TH.C
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Shaikhutdinov K. A., Popkov S. I.
Заглавие : Anomalous transport properties of a paramagnetic NiTiO3+HTSC two-phase system representing a random Josephson junction network
Разночтения заглавия :авие SCOPUS: Anomalous transport properties of a paramagnetic NiTio3 + HTSC two-phase system representing a random Josephson junction network
Место публикации : JETP Letters. - 2002. - Vol. 75, Is. 3. - P.138-141. - ISSN 0021-3640, DOI 10.1134/1.1469500
Примечания : Cited References: 23
Предметные рубрики: RESISTIVE PROPERTIES
CRITICAL CURRENTS
SNS JUNCTIONS
COMPOSITES
Аннотация: Composites representing a network of random Josephson junctions and characterized by the compositions 92.5 at. % Y3/4Lu1/4Ba2Cu3O7 + 7.5 at. % NiTiO3 and 92.5 at. % Y3/4Lu1/4Ba2Cu3O7 + 7.5 at.% MgTiO3 are synthesized, and their magnetoresistance properties are studied. The temperature dependence of the resistance R(T) measured for the composite that contains the paramagnetic NiTiO3 compound exhibits a characteristic feature below the superconducting transition temperature T-c of the high-T-c superconductor, namely, a region where R is independent of the current j and weakly depends on the magnetic field H. Below a certain temperature T-m, a strong dependence of R on j and H is observed, which is peculiar to a network of Josephson junctions. The dependences R(T, j, H) obtained for the "reference" samples with the nonmagnetic MgTiO3 compound exhibit no such features. The anomalous behavior of the HTSC + NiTiO3 composite is explained by the effect produced by the magnetic moments of Ni atoms in the insulating barriers on the transport current. (C) 2002 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Gokhfeld D. M., Ospishchev S. V., Shaikhutdinov K. A., Aleksandrov K. S.
Заглавие : Applicability of the theory based on Andreev reflection to the description of experimental current-voltage characteristics of polycrystalline HTSC plus normal metal composites
Место публикации : Physica C. - 1999. - Vol. 314, Is. 1-2. - P.51-54. - ISSN 0921-4534, DOI 10.1016/S0921-4534(99)00151-3
Примечания : Cited References: 19
Предметные рубрики: WEAK LINKS
JUNCTIONS
FILMS
Ключевые слова (''Своб.индексиров.''): ybacuo + bapbo3 composites--network of weak s-n-s links--current-voltage characteristic
Аннотация: Measurements of current-voltage characteristics (CVC) of Y3/4Lu1/4Ba2,Cu3O7 + BaPbO3 and Y3/4Lu1/4Ba2Cu3O7 +BaPb0.9Sn0.1O3 composites modelling network of superconducting-normal metal-superconducting (S-N-S) junctions in effectively 'clean' and 'dirty' limits, respectively, have been performed. Essential difference of CVCs for these composites is observed in spite of the identical preparation technique and experimental conditions. It is shown that the theory for S-N-S junctions [R. Kummel, U. Gunsenheimer, R. Nicolsky, Phys. Rev. B, 42 (1990) 3932] well describes the experimental CVCs of the composites in both cases. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zherikhina L. N., Tskhovrebov A. M., Klinkova L. A., Balaev D. A., Popkov S. I., Shaikhutdinov K. A.
Заглавие : Ba0.6K0.4BiO3 single crystal as a multiple Josephson system: New coherent effect?
Коллективы : International Conference on Low Temperature Physics
Место публикации : Journal of Physics: Conference Series. - 2012. - Vol. 400, Pt. 2. - Ст.022146. - P. - ISSN 1742-6588, DOI 10.1088/1742-6596/400/2/022146
Ключевые слова (''Своб.индексиров.''): antiphase--coherent effect--electric transport--high-t--inhomogeneous superconductors--josephson--josephson junctions--josephson tunneling--non-linear i-v--polycrystalline samples--superconducting gaps--superconducting state--low temperature effects--low temperature engineering--magnetic fields--superconductivity--single crystals
Аннотация: The existence of space inhomogeneous superconductor insulator state (SISIS) found out earlier in polycrystalline samples of high-Tc system Ba0.6K0.4BiO3 (Tc?30 K) is confirmed on Ba0.6K0.4BiO3 single crystal. At T* (T*<Tc, T*?17 K) the transition from the homogeneous superconducting state into the SISIS occurs. SISIS is characterized by the appearance of two gapes on the Fermi surface: semi- and superconducting, that are modulated in space in antiphase, the electric transport between superconducting regions being carried out due to Josephson tunneling. Thus the whole sample becomes a multiple Josephson system. Nonlinear I-V curves, depended on temperature and magnetic field, that are typical to a Josephson system, are observed on Ba0.6K0.4BiO3 single crystal at temperatures below T*. Besides, a step like peculiarity at the values of voltage of the order of one and two superconducting gaps shows up. These peculiarities are suppressed by magnetic field much earlier then critical current. Perhaps the last phenomenon is the consequence of "coherent" state of several successive Josephson junctions, appeared in the exfoliation state. В© Published under licence by IOP Publishing Ltd.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kablov E. N., Piskorskii V. P., Valeev R. A., Ospennikova O. G., Rezchikova I. I., Volkov N. V., Shaikhutdinov K. A.
Заглавие : Boron mobility in sintered (Pr, Dy)–(Fe, Co)–B materials with a high cobalt content
Место публикации : Russ. Metall. (Metally): Pleiades Publishing, 2014. - Vol. 2014, Is. 9. - P.721–724. - ISSN 0036-0295, DOI 10.1134/S0036029514090080. - ISSN 1555-6255
Примечания : Cited References: 15
Аннотация: Sintered (Pr, Dy)–(Fe1 – yCoy)–B materials with up to y ≈ 0.5 atomic fractions have been studied. Boron is found to be a movable element, and its diffusion between principal magnetic phase A and other boron containing phases determines the properties of the materials. The structure of principal magnetic phase grains is sufficiently complex: their periphery is enriched in boron. The enrichment is shown to cause a decrease in the coercive force of the materials to zero after sintering.
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