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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) : Mamalis A. G., Petrov M. I., Balaev D. A., Shaihutdinov K. A., Gohfeld D. M., Militsyn S. V., Ovchinnikov S. G., Kirko V. I., Vottea I. N.
Заглавие : A DC superconducting fault current limiter using die-pressed YBa2Cu3O7 ceramic
Место публикации : Supercond. Sci. Technol.: IOP PUBLISHING LTD, 2001. - Vol. 14, Is. 6. - P413-416. - ISSN 0953-2048, DOI 10.1088/0953-2048/14/6/316
Примечания : Cited References: 14
Предметные рубрики: CURRENT-VOLTAGE CHARACTERISTICS
WEAK LINKS
COMPOSITES
Ключевые слова (''Своб.индексиров.''): current voltage characteristics--electric fault currents--high temperature applications--josephson junction devices--polycrystalline materials--fault current limiter devices--superconducting materials
Аннотация: A model of a superconducting fault current limiter on a polycrystalline high-temperature superconductor basis is checked in the dc short circuit regime. Protection of load takes place under the conditions described in this paper. The use of ceramic materials with superconducting-normal metal-superconducting Josephson junction network having an S-type current-voltage characteristic (CVC) is shown to be effective for fault current limiter devices.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Alekseev K. N., Kusmartsev F. V.
Заглавие : Pendulum limit, chaos and phase-locking in the dynamics of ac-driven semiconductor superlattices
Место публикации : Phys. Lett. A: ELSEVIER SCIENCE BV, 2002. - Vol. 305, Is. 5. - P281-288. - ISSN 0375-9601, DOI 10.1016/S0375-9601(02)01420-2
Примечания : Cited References: 60
Предметные рубрики: STRANGE NONCHAOTIC ATTRACTORS
DC VOLTAGE GENERATION
JOSEPHSON-JUNCTIONS
GAAS/ALAS SUPERLATTICE
BLOCH OSCILLATIONS
TERAHERTZ RADIATION
ELECTRIC-FIELD
THZ RADIATION
FREQUENCY
TRANSPORT
Ключевые слова (''Своб.индексиров.''): semiconductor superlattice--pendulum--chaos--phase-locking--josephson junction--chaos--josephson junction--pendulum--phase-locking--semiconductor superlattice--analytic method--analytical parameters--article--dynamics--electric potential--semiconductor--temperature
Аннотация: We describe a limiting case when nonlinear dynamics of an ac-driven semiconductor superlattice in the miniband transport regime is governed by a periodically forced and damped pendulum equations. We find analytically the conditions for a transition to chaos. With increasing temperature the chaos disappears. We also discuss fractional do voltage states in a superlattice originating from phase-locked states of the pendulum. (C) 2002 Elsevier Science B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Altin S., Gokhfeld D. M.
Заглавие : Magnetization loops and pinning force of Bi-2212 single-crystal whiskers
Место публикации : Physica C. - 2011. - Vol. 471, Is. 7-8. - P.217-221. - ISSN 0921-4534, DOI 10.1016/j.physc.2011.01.006
Примечания : Cited References: 40. - The work is supported by Project No. 7 of RAS Program "Quantum physics of condensed matter", Grant No. 13 of Lavrentyev competition of young researchers of SB RAS and Scientific and Technical Research Council of Turkey (TUBITAK) under Contract No. TUBITAK-109T747.
Предметные рубрики: T-C SUPERCONDUCTORS
HIGH-TEMPERATURE SUPERCONDUCTORS
JOSEPHSON VORTICES
GROWTH
BI2SR2CACU2O8+DELTA
DENSITY
STATE
FIELD
MELT
Ключевые слова (''Своб.индексиров.''): bi-2212--whisker--magnetization loop--pinning force--extended critical state model--bi-2212--extended critical state model--magnetization loop--pinning force--whisker--bi-2212--extended critical state model--magnetization loop--pinning force--whisker--flux pinning--magnetic fields--magnetization--critical current density (superconductivity)
Аннотация: Dependence of magnetization on applied magnetic field for single-crystal Bi-2212 whiskers was measured at different temperatures. Symmetric and asymmetric magnetization loops were successfully described by the extended critical state model (the extended Valkov-Khrustalev model). Pinning force of whiskers was investigated. (C) 2011 Elsevier B.V. All rights reserved.
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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) : 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Semenov S. V., Petrov M. I.
Заглавие : Correlation between magnetoresistance and magnetization hysteresis in a granular high-T C superconductor: Impact of flux compression in the intergrain medium
Место публикации : J. Supercond. Nov. Magn.: Springer, 2014. - Vol. 27, Is. 6. - P.1425-1429. - ISSN 1557-1939, DOI 10.1007/s10948-014-2491-6. - ISSN 1557-1947
Примечания : Cited References: 27
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTOR
JOSEPHSON MEDIUM
CRITICAL-STATE
YBA2CU3O7-DELTA
FIELDS
BEHAVIOR
HTSC
COMPOSITES
RESISTANCE
MOTION
Ключевые слова (''Своб.индексиров.''): granular superconductor--josephson medium--effective field--magnetoresistance--magnetization hysteresis
Аннотация: The correlation between experimental magnetic field dependences of magnetoresistance and magnetization hysteresis in granular YBa2Cu3O7 is established. Within the proposed approach, magnetoresistance is assumed to be determined by the effective field in the intergrain boundaries the ensemble of which is considered to be a Josephson medium. The effective field in the intergrain medium can be written in the form B (eff)(H)=H-4 pi M(H)x alpha, where alpha is the parameter of averaged demagnetizing factors of grains and the degree of flux compression. A comparison of experimental magnetoresistance R(H) and magnetization M(H) hysteresis dependences obtained at different external magnetic field sweep rates yields the value alpha similar to 10, which is caused by the flux compression between grains. The proposed model describes well most of the features of the magnetoresistance hysteresis in granular high-T (C) superconductors.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Batiyev E. G., Borisyuk V.A.
Заглавие : Oscillations in Josephson-Junctions of superconducting films
Место публикации : Fiz. Nizk. Temp. - 1984. - Vol. 10, Is. 4. - P.341-347. - ISSN 0132-6414
Примечания : Cited References: 11
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие : Light induced Josephson like current between two coupled nonlinear cavities coupled with a symmetrically positioned photonic crystal waveguide
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 2011. - Vol. 23, Is. 6. - Ст.65304. - ISSN 0953-8984, DOI 10.1088/0953-8984/23/6/065304
Примечания : Cited References: 26. - The work was supported by RFBR-grant 09-02-98005-'Siberia' and by RFBR-grant 11-02-00289.
Предметные рубрики: LOCALIZED MODES
BREAKING
CIRCUITS
Ключевые слова (''Своб.индексиров.''): complex amplitude--green function theory--josephson--kerr materials--light intensity--nonlinear cavities--optical cavities--photonic crystal waveguide--optical waveguides--photonic crystals--transparency--waveguides--light transmission
Аннотация: We consider light transmission in a photonic crystal waveguide coupled with two identical nonlinear cavities positioned symmetrically beside the waveguide and coupled with each other. Using Green function theory we show three scenarios for the transmission. The first one inherits the linear case in which the light transmission preserves the symmetry. In the second scenario the symmetry is broken by the light intensities at the cavities. In the third scenario the intensities are equal but the phases of the complex amplitudes are different at the cavities. This results in a Josephson like current between the cavities. The model consideration agrees well with computations of the Poynting current in a photonic crystal waveguide coupled with two optical cavities filled with a Kerr material.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F., Pichugin K. N.
Заглавие : Ligth-induced breaking of symmetry in photonic crystal waveguides with nonlinear defects as a key for all-optical switching circuits
Место публикации : Spontaneous symmetry breaking, self-trapping, and Josephson oscillations/ ed. B. A. Malomed: Springer, 2013. - P.89-124. - (Progress in optical science and photonics; Vol. 1). - ISSN 978-3-642-21206-2, DOI 10.1007/10091_2011_1
Аннотация: We consider light transmission in 2D photonic crystal waveguide coupled with two identical nonlinear defects positioned symmetrically aside the waveguide. We show that with growth of injected light power there is a breaking of symmetry by two ways. In the first way the symmetry is broken because of different light intensities at the defects. In the second way the intensities at the defects are equaled but phases of complex amplitudes are different. That results in a vortical power flow between the defects similar to the DC Josephson effect if the input power over the waveguide is applied and the defects are coupled. As application of these phenomena we consider the symmetry breaking for the light transmission in a T-shaped photonic waveguide with two nonlinear defects. We demonstrate as 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. Finally we consider the symmetry breaking in the waveguide coupled with single defect presented however by two dipole modes.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Popkov S. I., Sabitova E. I., Semenov S. V., Shaykhutdinov K. A., Shabanov A. V., Petrov M. I.
Заглавие : Compression of a magnetic flux in the intergrain medium of a YBa2Cu3O7 granular superconductor from magnetic and magnetoresistive measurements
Разночтения заглавия :авие SCOPUS: Compression of a magnetic flux in the intergrain medium of a YBa 2Cu 3O 7 granular superconductor from magnetic and magnetoresistive measurements
Место публикации : J. Appl. Phys.: AMER INST PHYSICS, 2011. - Vol. 110, Is. 9. - Ст.93918. - ISSN 0021-8979, DOI 10.1063/1.3657775
Примечания : Cited References: 21. - We thank V. V. Val'kov and A. D. Balaev for useful discussions of the results and I. Nemtsev for microscopic study of the samples. The study was supported by the Program of the Russian Academy of Sciences No. 5, Project No. 7.
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
CRITICAL-CURRENT-DENSITY
CRITICAL-STATE MODEL
CRITICAL CURRENTS
JOSEPHSON MEDIUM
FIELD
TRANSITION
Ключевые слова (''Своб.индексиров.''): effective field--external fields--field dependence--field induced--granular superconductors--inter-grain--josephson--magnetoresistive--space between--superconducting grains--transport currents--electric resistance--magnetic flux--magnetic moments--superconductivity--superconducting materials
Аннотация: A method to determine a value of the effective field in the intergrain medium of a granular superconductor is proposed. The space between superconducting grains is considered to be a Josephson medium where passage of the transport current causes dissipation and the effective field is superposition of external field H and the field induced by magnetic moments of superconducting grains. The method proposed is based on the comparison of hysteresis field dependences of magnetoresistance and magnetization and their relaxation at H=const. By the example of granular YBa2Cu3O7, it is shown that, in the region of weak fields, the effective field in the intergrain medium exceeds by far the external field, i.e., compression of a magnetic flux occurs. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3657775]
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popkov S. I., Balaev D. A., Shaihutdinov K. A., Petrov M. I.
Заглавие : Crossover from S-I-S to S-F-S junctions in composites Y3/4Lu1/4Ba2Cu3O7+Y-3(Al1-xFex)(5)O-12
Разночтения заглавия :авие SCOPUS: Crossover from S-I-S to S-F-S junctions in composites Y3/4Lu1/4Ba2Cu3O7 + Y3(Al1-xFex)5O12
Место публикации : Physica C: ELSEVIER SCIENCE BV, 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P1311-1312. - ISSN 0921-4534, DOI 10.1016/j.physc.2007.03.348
Примечания : Cited References: 4
Ключевые слова (''Своб.индексиров.''): s-f-s structures--high-t-c superconductors--high-tc superconductors--s-f-s structures--ferrimagnetic materials--garnets--josephson junction devices--magnetization--transport properties--yttrium alloys--critical concentration--ferrimagnet junctions--magneto-active ions--super current carriers--high temperature superconductors
Аннотация: The transport properties of the two phases composites based on Y3/4Lu1/4Ba2Cu3O7 (YBCO) and Y-3(Al1-xFex)(5)O-12 (X = 0-0... 1.0) have been studied to investigate the effect of magnetic ordering in garnet on superconducting properties of the composites. The composites represent network of Josephson junctions where the non-superconducting ingredient (garnet) acts as barriers separating YBCO grains. It is found that magneto-active ions (Fe) in garnet are responsible for an additional suppression of Josephson coupling in the composites. At some critical concentration of Fe atoms full suppression of super current is observed in a temperature range from T-C of YBCO grains down to the characteristic temperature T,,,. This behavior is attributed to the interaction of super current carriers with spins of Fe atoms located in the barriers. The crossover from S-I-S (S-superconductor, I-insulator) to S-F-S (F-ferrimagnet) junctions is observed in the compdsites Y3/4Lu1/4Ba2Cu3O7 + Y-3(Al1-xFex)(5)O-12 with x increase. (c) 2007 Elsevier B.V. All rights reserved.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Shaikhutdinov K. A., Khrustalev B. P.
Заглавие : Effect of thermal fluctuations on the resistive properties of HTSC+CuO composites
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1997. - Vol. 39, Is. 11. - P1749-1750. - ISSN 1063-7834, DOI 10.1134/1.1130163
Примечания : Cited References: 11
Предметные рубрики: JOSEPHSON-JUNCTIONS
Аннотация: The effect of thermally activated phase slippage (TAPS) on the resistive properties of Y3/4Lu1/4Ba2Cu3O7+O-7 composites has been studied. The experimental temperature dependences of the electrical resistance are described in terms of the TAPS mechanism using the temperature dependences of the tunnel-junction critical current. (C) 1997 American Institute of Physics.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Bykov A. A., Semenov S. V., Popkov S. I., Dubrovskii A. A., Shaikhutdinov K. A., Petrov M. I.
Заглавие : General regularities of magnetoresistive effects in the polycrystalline yttrium and bismuth high-temperature superconductor systems
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 53, Is. 5. - P922-932. - ISSN 1063-7834, DOI 10.1134/S1063783411050052
Примечания : Cited References: 52. - This study was supported by the Russian Academy of Sciences within the program no. 5 (project no. 7).
Предметные рубрики: HIGH MAGNETIC-FIELDS
PHASE-SLIP
RESISTIVE TRANSITION
CU-O
TRANSPORT-PROPERTIES
JOSEPHSON MEDIUM
MIXED-STATE
FLUX-CREEP
T-C
DISSIPATION
Аннотация: The influence of thermomagnetic prehistory on the behavior of a resistive transition R(T) in external magnetic fields of polycrystalline YBa(2)Cu(3)O(7) and Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O (x) high-temperature supercon-ductors and the Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O (x) + Ag texture has been investigated. It has been found that, for YBa(2)Cu(3)O(7), the thermomagnetic prehistory exerts a substantial influence on the dissipation in the subsystem of grain boundaries in magnetic fields up to similar to 10(3) Oe, and this effect becomes insignificant in fields higher than similar to 10(4) Oe. This behavior has been explained by the influence of magnetic moments of high-temperature superconductor grains on the effective magnetic field in the intergranular medium. For bismuth high-temperature superconductors, no influence of thermomagnetic prehistory on the resistive transition has been observed; however, this effect manifests itself in current-voltage characteristics at high transport current densities. There is also a radical difference in the behavior of isotherms of the magnetoresistance R(H) for the yttrium and bismuth systems. For YBa(2)Cu(3)O(7), there is a clear separation between the dissipation regimes in the intergranular medium and in grains, which manifests itself even at low transport current densities as a change of sign in the curvature of the dependence R(H). For a texture based on the bismuth high-temperature superconductor, this feature has been observed only at high current densities (comparable to the critical current density at H = 0). This difference in the behavior of magnetoresistive properties of the classical high-temperature superconductor systems under investigation has been explained by relatively low irreversibility fields of the bismuth high-temperature superconductors. In these materials, simultaneous processes of dissipation can occur in an external magnetic field both in the subsystem of grain boundaries between crystallites and in the crystallites themselves.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M.
Заглавие : Computation of current-voltage characteristics of the SNS junctions
Место публикации : Physica C: ELSEVIER SCIENCE BV, 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P807-808. - ISSN 0921-4534, DOI 10.1016/j.physc.2007.04.078
Примечания : Cited References: 8
Предметные рубрики: WEAK LINKS
Ключевые слова (''Своб.индексиров.''): weak link--andreev scattering--subharmonic gap structure--andreev scattering--subharmonic gap structure--weak link--current voltage characteristics--nanowires--reflection--thermal effects--andreev scattering--microbridges--subharmonic gap structure--weak links--josephson junction devices
Аннотация: Simplified model for current-voltage characteristics of weak links (superconductor - normal metal - superconductor junctions, micro-bridges, superconducting nanowires) is suggested. It is based on approach which considers Andreev reflections as responsible for the transfer of dissipative current through the metallic Josephson junction. The current-voltage characteristics of tin microbridges at different temperatures were computed. (c) 2007 Elsevier B.V. All rights reserved.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M.
Заглавие : Description of hysteretic current-voltage characteristics of superconductor-normal metal-superconductor junctions
Место публикации : Supercond. Sci. Technol.: IOP PUBLISHING LTD, 2007. - Vol. 20, Is. 1. - P62-66. - ISSN 0953-2048, DOI 10.1088/0953-2048/20/1/011
Примечания : Cited References: 24
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTOR
WEAK LINKS
POLYCRYSTALLINE HTSC
ANDREEV REFLECTION
SIMPLIFIED MODEL
COMPOSITES
TRANSPORT
Ключевые слова (''Своб.индексиров.''): computational methods--current voltage characteristics--electric resistance--josephson junction devices--mathematical models--yttrium barium copper oxides--andreev reflection--metal superconductor junctions--metallic josephson junction--weak links--semiconductor junctions
Аннотация: A simplified model for the current-voltage characteristics of weak links is suggested. It is based on an approach considering the multiple Andreev reflection in a metallic Josephson junction. The model allows one to calculate the current-voltage characteristics of superconductor-normal metal-superconductor junctions with different thicknesses of normal layer at different temperatures. A hysteretic peculiarity of the V(I) dependence is described as a result of the negative differential resistance. The current-voltage characteristics of tin microbridges and high- T-c composite YBCO + BaPbO3 were computed.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Gokhfeld D. M., Popkov S. I., Shaykhutdinov K. A., Petrov M. I.
Заглавие : Hysteretic behavior of the magnetoresistance and the critical current of bulk Y3/4Lu1/4Ba2CU3O7+CuOcomposites in a magnetic field
Разночтения заглавия :авие SCOPUS: Hysteretic behavior of the magnetoresistance and the critical current of bulk Y3/4Lu1/4Ba2Cu3O7 + CuO composites in a magnetic field
Место публикации : Physica C: ELSEVIER SCIENCE BV, 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P1307-1308. - ISSN 0921-4534, DOI 10.1016/j.physc.2007.03.346
Примечания : Cited References: 7
Предметные рубрики: SUPERCONDUCTORS
Ключевые слова (''Своб.индексиров.''): htsc--resistivity--magnetic field--relaxation--htsc--magnetic field--relaxation--resistivity--crystallites--magnetic fields--magnetic hysteresis--magnetoresistance--yttrium barium copper oxides--superconducting crystallites--superconducting systems--tunnel-type josephson junctions--josephson junction devices
Аннотация: The hysteretic behavior of critical current j(C)(H) and magneto-resistance R(H) of composites Y-Ba-Cu-O + CuO have been studied and presented. The composites represent the network of tunnel-type Josephson junctions where copper oxide acts as a material forming barriers between superconducting (YBCO) crystallites. The characteristic features of R(H) and j(C)(H) dependences are discussed in the frames of the conception of "two level superconducting system" (the Josephson media and HTSC crystallites) which is realized in the composites under study. (c) 2007 Elsevier B.V. All rights reserved.
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18.

Вид документа : Однотомное издание
Шифр издания :
Заглавие : International workshop on actual problems of condensed matter physics : Program. Book of abstracts
Выходные данные : Krasnoyarsk, 2017
Колич.характеристики :30 с
Коллективы : Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Siberian Federal Univercity, International Workshop on Actual Problems of Condensed Matter Physics (27 Mar. - 1 Apr. 2017; Krasnoyarsk/ Cheremushki) :
Содержание : Magnetic and transport properties of the epitaxial Fe3Si film on a Si substrate/ I. A. Bondarev. The magnetic anisotropy of the Fe and Fe(1-x)Si(x) thin films depend on/ I. A. Yakovlev [и др.]. Inverted opals as the Josephson networks of weak links/ S. I. Popkov [и др.]. Electronic structure and Fermi surface within the cluster perturbation theory in X-operators representation/ S. Nikolaev, V. I. Kuz'min, S. G. Ovchinnikov. DFT investigation of electronic and optical magnetic properties of one dimensional transition metal halide structuresTmHaI3/ A. S. Fedorov [и др.]. Effect of interatomic exchange interaction on spin crossover and Mott-Hubbard transition under high pressure and the physical properties of the low Earth’s mantle/ S. G. Ovchinnikov [и др.]. Extremely high magnetic-field sensitivity of charge transport in the Mn/SiO2/p-Si hybrid structure/ I. A. Tarasov [и др.]. Marnetic-field sensitivity of charge transport in silicon-based hybrid structures/ N. V. Volkov [et al.]. Fabrication of multi-terminal planar devices based on epitaxial Fe1-xSix films grown on Si(111)/ A. V. Lukyanenko, A. S. Tarasov, I. A. Tarasov [et al.] ; A. V. Luyanenko [и др.]. Magnetic field-driven lateral photovoltaic effect in the Fe/SiO2/p-Si hibrid structure with the Scottky barrier/ M. V. Rautskii [и др.]. Small angle X-ray scattering and atomic structure of aptamer biomolecules/ R. Moryachkov [и др.]. Iron silicides and pure iron epitaxial and highly-textured nanostructures on silicon: growth and their physical properties/ I. A. Tarasov [и др.]. Magnetic nanoparticles and DNA-aptamers conjugates for diagnostics and therapy of cancer/ A. E. Sokolov [и др.]. The microscopic origin of ferromagnetism in Fe silicides/ I. S. Sandalov [и др.].
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popkov S. I., Gokhfeld D. M., Bykov A. A., Mistonov A., Shabanov A. V., Terentiev K. Yu.
Заглавие : Inverted opals as the Josephson networks of weak links
Коллективы : International conference on strongly correlated electron systems
Место публикации : The International conference on strongly correlated electron systems (SCES2017): abstracts. - 2017. - Ст.Th-3-44
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Popkov S. I., Shaikhutdinov K. A., Petrov M. I.
Заглавие : Investigation of the Josephson coupling through a magnetoactive barrier (ferrimagnet, paramagnet) in Y3/4Lu1/4Ba2Cu3O7+Y-3(Al1-xFex)(5)O-12 composites
Разночтения заглавия :авие SCOPUS: Investigation of the Josephson coupling through a magnetoactive barrier (ferrimagnet, paramagnet) in Y3/4Lu1/4Ba 2Cu3O7 + Y3(Al1 - X Fe x )5O12 composites
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2006. - Vol. 48, Is. 11. - P2046-2055. - ISSN 1063-7834, DOI 10.1134/S1063783406110023
Примечания : Cited References: 41
Предметные рубрики: S-F-S
MAGNETIC-PROPERTIES
RESISTIVE PROPERTIES
JUNCTION NETWORK
SUPERCONDUCTOR
Y3FE5-XALXO12
TRANSITION
TRANSPORT
METAL
FIELD
Аннотация: The transport properties of two-phase composites consisting of a high-temperature superconductor and a nonsuperconducting component with magnetic ordering are analyzed. These composites are considered as a network of "superconductor-magnetoactive insulator-superconductor" weak links of the Josephson type. Substituted garnets Y-3(Al1 - x Fe (x) )(5)O-12 (x = 0, ..., 1.0) are used as a magnetoactive component. The composites under investigation contain 92.5 vol % Y3/4Lu1/4Ba2Cu3O7 (the high-temperature superconductor) and 7.5 vol % Y-3(Al1 - x Fe (x) )(5)O-12 (x = 0, ..., 1.0). It is shown that an increase in the iron content in the Y-3(Al1 - x Fe (x) )(5)O-12 garnet leads to a reduction of the Josephson coupling strength: the temperature range in which the electrical resistance of the composites is equal to zero is reduced, and the critical current density at a temperature of 4.2 K decreases exponentially. For composites in which the iron content in the Y-3(Al1 - x Fe (x) )(5)O-12 garnet is higher than 0.1, the temperature dependence of the electrical resistance R(T) at temperatures below the transition point T-C of high-temperature superconductor crystallites has a portion in the range T-m -T-C where the resistance R(T) is independent of the transport current and the magnetic field strength. Below the temperature T-m , the dependences of the electrical resistance R(T) of the composites are nonlinear functions of the current and involve a considerable contribution from magnetoresistance. This behavior is characteristic of a network of Josephson junctions. The temperature T-m decreases with an increase in the iron content in the Y-3(Al1 - x Fe (x) )(5)O-12 garnet. The appearance of the above feature in the temperature dependences of the electrical resistance R(T) is interpreted as complete suppression of the Josephson coupling in the temperature range above T (m) due to the interaction of supercurrent carrier pairs with magnetic moments of iron atoms in the dielectric barriers separating high-temperature superconductor grains.
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