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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Говорун, Илья Валерьевич, Лексиков, Александр Александрович, Лексиков, Андрей Александрович, Сержантов, Алексей Михайлович
Заглавие : Исследование функционирования микрополоскового устройства защиты с ВТСП элементом в режимах повышенной мощности и кратковременных импульсов
Место публикации : Изв. вузов. Физика: Томский государственный университет, 2015. - Т. 58, № 8/2. - С. 126-128. - ISSN 0021-3411
Примечания : Библиогр.: 2. - Работа выполнена при поддержке Министерства образования и науки РФ, соглашение №14-607-21-0039
Ключевые слова (''Своб.индексиров.''): микрополосковый резонатор--втсп--устройство защиты--взаимодействие резонаторов--microstrip resonator--hts--protection device--interaction of resonators
Аннотация: Разработано и изготовлено устройство защиты на основе микрополосковых резонаторов форме гантели с переключающим элементом, выполненным из ВТСП тонкой пленки. Исследованы передаточные характеристики устройства при работе с сигналами до 40 Вт мощности, а также влияние на полосу пропускания длительности одиночного импульса сигнала разной мощности. Проведена экспериментальная оценка времени переключения в закрытый режим.A microstrip power limiter based on dumbbell-shaped resonators having a switcher made from high-temperature superconducting film was designed and fabricated. The transmission characteristics of the device were investigated in the case of microwave power level up to 40 W. An influence of single pulse duration of various magnitudes upon the passband of the device was investigated. An experimental estimation of the switch time to the closed mode was done.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shaihutdinov K. A., Balaev D. A., Gokhfeld D. M., Popkov S. I., Petrov M. I.
Заглавие : Transport properties of HTSC-based composites: Modeling the random networks of Josephson weak links with magneto-active barriers.
Коллективы : NATO Advanced Research Workshop on Vortex Dynamics in High-Temperature Superconductors
Разночтения заглавия :авие SCOPUS: Transport properties of HTSC- based composites: Modeling the random networks of Josephson weak links with magneto-active barriers
Место публикации : J. Low Temp. Phys./ NATO Advanced Research Workshop on Vortex Dynamics in High-Temperature Superconductors (2002 ; May ; 17-22). - 2003. - Vol. 130, Is. 3-4. - P.347-381. - ISSN 0022-2291, DOI 10.1023/A:1022204705059
Примечания : Cited References: 89
Предметные рубрики: CURRENT-VOLTAGE CHARACTERISTICS
HIGH-TEMPERATURE SUPERCONDUCTORS
SNS JUNCTIONS
THERMAL FLUCTUATIONS
RESISTIVE PROPERTIES
PERCOLATION SYSTEM
TRANSITION
YBA2CU3O7
BOUNDARY
OXIDES
Ключевые слова (''Своб.индексиров.''): crystalline materials--electric insulators--josephson junction devices--magnetic devices--magnetic barriers--superconducting materials--composite
Аннотация: The results of the study of transport properties (temperature dependences of resistivity and critical current, current-voltage characteristics) of two-phase composites on the basis of Y3/4Lu1/4Ba2Cu3O7 high-temperature superconductor (HTSC) produced by fast baking technique and modelling networks of Josephson-type weak links are reported. Non-superconducting ingredients with different magnetic structures, insulators and normal metals, function as barriers between HTSC crystallites. Besides strong suppression of superconducting properties in HTSC composites with magnetic barriers, anomalous behavior of temperature dependences of resistivity below T-c of HTSC grains have been observed and investigated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Ospishchev S. V., Aleksandrov K. S.
Заглавие : Transport properties of HTSC plus Ba(Pb, Met)O-3 composites as functions of the electrical and magnetic characteristics of nonsuperconducting components
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2000. - Vol. 42, Is. 5. - P.810-815. - ISSN 1063-7834, DOI 10.1134/1.1131294
Примечания : Cited References: 27
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
CURRENT-VOLTAGE CHARACTERISTICS
NORMAL-METAL LAYER
WEAK LINKS
JUNCTIONS
SCATTERING
BAPB1-XBIXO3
TRANSITION
IMPURITIES
BREAKING
Аннотация: Composites simulating a network of weak metallic links and consisting of a classic 1-2-3 HTSC and a BaPbO3 metal oxide with incorporated Sn, Ni, and Fe impurities have been prepared. Experimental resistivity, magnetic, and Mossbauer studies of the BaPb(0.9)Met(0.1)O(3) nonsuperconducting components are presented. The transport properties of the HTSC + BaPb(0.9)Met(0.1)O(3) composites have been investigated. The superconducting properties of the composites are observed to be suppressed, both when the carrier mean free path in nonsuperconducting components with tin impurities decreases, and as a result of an additional interaction of the magnetic moments of (Fe, Ni) impurities with the spins of supercurrent carriers. The experimental temperature dependences of the composite critical current are analyzed in terms of the de Gennes theory for the superconductor-normal metal-superconductor structures. (C) 2000 MAIK "Nauka/Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makarov I. A., Shneyder E. I., Kozlov P. A., Ovchinnikov S. G.
Заглавие : Transition between large and small polaron states in the electronic structure of HTSC cuprates
Коллективы : RFBR [13-02-01395 a, 14-02-31677 mol_a]
Место публикации : J. Supercond. Nov. Magn.: Springer, 2016. - Vol. 29, Is. 4. - P.1063-1068. - ISSN 1557-1939, DOI 10.1007/s10948-016-3375-8. - ISSN 1557-1947(eISSN)
Примечания : Cited References:10. - This work was funded by RFBR according to the research projects No. 13-02-01395 a and No. 14-02-31677 mol_a.
Предметные рубрики: SUPERCONDUCTIVITY
Ключевые слова (''Своб.индексиров.''): cuprates--strong electron correlations--electron-phonon interaction--polaron--franck-condon process--hubbard fermions--band structure
Аннотация: The effect of strong electron correlations (SEC) and strong electron-phonon interaction (EPI) on the electronic structure of cuprates is studied within the polaronic version of the generalized tight binding method. Both diagonal and off-diagonal EPI in terms of ionic coordinates are considered.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kozlov P. A., Makarov I. A., Ovchinnikov S. G.
Заглавие : Transition Between Large and Small Polaron States in the Electronic Structure of HTSC Cuprates
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.P2.11. - P.153. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 3
Ключевые слова (''Своб.индексиров.''): cuprates--strong electron correlations--electron-phonon interaction--polaron--franck-condon
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Dubrovskiy A. A., Shaykhutdinov K. A., Popkov S. I., Petrov M. I.
Заглавие : Time relaxation of residual resistance of HTSC-based composites
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). - P1309-1310. - ISSN 0921-4534, DOI 10.1016/j.physc.2007.03.347
Примечания : Cited References: 5
Предметные рубрики: SUPERCONDUCTORS
Ключевые слова (''Своб.индексиров.''): granular htsc--resistance--relaxation--magnetic flux--granular htsc--magnetic flux--relaxation--resistance--copper oxides--crystallites--magnetic flux--magnetic relaxation--magnetization--yttrium barium copper oxides--anderson-like relaxation processes--flux trapping--residual resistance--time relaxation--josephson junction devices
Аннотация: Magnetoresistance curves R(H) and time relaxation of the residual resistance of bulk YBCO + CuO composites have been studied. These composites represent the network of Josephson junctions, where CuO acts as a barrier between YBCO grains. It has been shown that hysteresis of the R(H) dependences is related to the flux trapping within the YBCO crystallites. This flux induces magnetic field in the intergrain media. Time relaxation of the residual resistance is caused by relaxation of the magnetization of YBCO grains. The time dependence of the residual resistance obeys a logarithmic law, which describes the Anderson-like relaxation processes in the YBCO grains. (c) 2007 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Петров, Михаил Иванович, Balaev D. A., Шайхутдинов, Кирилл Александрович, Khrustalev B. P., Aleksandrov K. S.
Заглавие : Thermally activated phase slippage in composites HTSC + CuO
Место публикации : Physica C-Superconductivity and its Applications. - 1997. - Vol. 282, Is. PART 4. - P.2453-2454. - ISSN 0921-4534
Ключевые слова (''Своб.индексиров.''): copper oxides--critical currents--thermal effects--thermally activated phase slippage (taps)--high temperature superconductors
Аннотация: The effect of thermally activated phase slippage (TAPS) in composites HTSC + CuO has been studied. The experimental ?(T) dependences have been treated within framework of TAPS using temperature dependences of critical current for tunnel S-I-S junctions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Tetyueva T. N., Kveglis L. I., Efremov A. A., Balaev D. A., Shaikhutdinov K. A., Popkov S. I., Ovchinnikov S. G., Zeer E. P.
Заглавие : The synthesis, microstructure, transport and magnetic properties of Bi-based low density HTSC
Коллективы : Japanese/Mediterranean Workshop on Applied Electronmagnetic Engineering for Magnetic and Superconducting Materials/3rd Superconducting Flywheel Workshop
Место публикации : J. Mater. Process. Technol. - LAUSANNE: ELSEVIER SCIENCE SA, 2005. - Vol. 161, Is. 1-2. - С. 58-61. - APR 10. - ISSN 0924-0136, DOI 10.1016/j.jmatprotec.2004.07.056
Примечания : Cited Reference Count: 4
Аннотация: HTSC Bi1.8Pb0.3Sr2Ca2Cu3Ox of low density has been synthesized and its structural and physical properties have been studied. Scanning electron microscopy (SEM) image shows that the material obtained has porous "foam" structure. The levitation force measured for the porous Bi1.8Pb0.3Sr2Ca2Cu3Ox is appeared to be approximately the same as for polycrystalline YBCO of high density. These "foam" structures may be an ideal material for some practical applications of HTSCs in bulk form. (c) 2004 Elsevier B.V. All rights reserved.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Avramov P. V., Ovchinnikov S. G.
Заглавие : The strong electron correlation effects in XAFS spectra of HTSC cuprates
Место публикации : J. Phys. IV. - 1997. - Vol. 7: 9th International Conference on X-Ray Absorption Fine Structure (AUG 26-30, 1996, GRENOBLE, FRANCE), Is. C2. - P.183-185. - ISSN 1155-4339
Примечания : Cited References: 11
Предметные рубрики: X-RAY-ABSORPTION
MULTIPLE-SCATTERING ANALYSIS
EDGE STRUCTURE
LA2CUO4
XANES
Аннотация: Theoretical XAFS spectra of highly correlated copper oxides have been presented as a product of a single-electron part obtained by the SCF X alpha- SW method, and a multi-electron part obtained by the multi-band multi-electron p-d model. The main line of CuK-spectrum of La2CuO4 was aligned to the Cud(10) (L) under bar configuration and the single satellite line was aligned to the Cud(9). Comparison of the theoretical data with the experimental ones shows that the ground state of the two-holes in the CuO4 doped cell is triplet. The last conclusion has been confirmed by analysis of CuL2,3-spectra of two-hole impurity states of doped CuO4 cell. Another interesting future of CuL2,3-spectra a peak 2.8 eV higher the threshold was aligned to the transitions into quasi-stationary states due to existence of a high barrier in the Cud-state potential.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Dubrovskiy A. A., Balaev D. A., Shaykhutdinov K. A., Popkov S. I., Petrov M. I.
Заглавие : The effect of magnetization relaxation of superconducting grains on time evolution of the resistance of granular HTSC in constant applied magnetic field
Коллективы : International Conference on Low Temperature Physics
Место публикации : 25 International conftrence on low temperature physics. - 2008. - С. 298
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Dubrovskiy A. A., Shaykhutdinov K. A., Popkov S. I., Petrov M. I.
Заглавие : The effect of magnetisation relaxation of superconducting grains on time relaxation of the resistance of granular HTSC in constant applied magnetic field
Место публикации : Journal of Physics: Conference Series. - 2009. - Т. 150, № 5. - С. 052012. - ISSN 1742-6588, DOI 10.1088/1742-6596/150/5/052012
ГРНТИ : 29.19
РИНЦ,
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Петров, Михаил Иванович, Balaev D. A., Khrustalev B. P., Aleksandrov K. S.
Заглавие : The effect of heat treatment on the transport properties of the polycrystalline HTSC
Место публикации : Physica C-Superconductivity and its Applications. - 1994. - Vol. 235-240, Is. 5. - P.3043-3044. - ISSN 0921-4534, DOI 10.1016/0921-4534(94)91048-0
Примечания : Cited References: 6
Аннотация: Temperature dependences of transport critical current (Jc) have been studied for polycrystalline HTSC samples of 1-2-3 structure with Y3/4Lu1/4Ba2Cu3O7 composition. The main aim of the investigation was the effect of the boundaries between crystallites on the current-carrying capability of the high-temperature superconductor. The modifications of the boundaries have been achieved by the long time heat treatments up to one week (?150 hours). It has been demonstrated experimentally that the Kulik-Omel'yanchuk theory describes adequately the temperature dependence of Jc of samples with short heat treatment time in "clean" limit. The absolute value of Jc (4.2k) ? 1.4kA/cm2. Long-term heat treated samples have Jc(4.2K) ? 0.1kA/cm2 and the temperature dependence of Jc becomes close to predictions of de Gennes theory. В© 1994.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Shaihutdinov K. A., Popkov S. I., Petrov M. I.
Заглавие : The effect of ferrimagnetic ordering in insulating component of composites HTSC plus Yttrium Iron Garnet on its transport properties
Разночтения заглавия :авие SCOPUS: The effect of ferrimagnetic ordering in insulating component of composites HTSC + yttrium iron garnet on its transport properties
Место публикации : Solid State Commun.: PERGAMON-ELSEVIER SCIENCE LTD, 2003. - Vol. 125, Is. 5. - P281-285. - ISSN 0038-1098, DOI 10.1016/S0038-1098(02)00602-6
Примечания : Cited References: 34
Предметные рубрики: SUPERCONDUCTOR
TRANSITION
CURRENTS
Ключевые слова (''Своб.индексиров.''): high-tc superconductors--heterojunctions--magnetically ordered materials--grain boundaries--heterojunctions--high-tc superconductors--magnetically ordered materials--grain boundaries--grain boundaries--heterojunctions--high temperature superconductors--transport properties--yttrium compounds--ferrimagnetic ordering--garnets
Аннотация: Composites Y3/4Lu1/4Ba2Cu3O7 + Y3Fe5O12 modeling random network superconductor-ferrimagnetic-superconductor have been prepared and their transport properties (temperature dependences of resistivity rho and critical current density j(c), current-voltage characteristics) have been studied. Below the superconducting transition temperature T-m the rho(T) dependences exhibit a kink at some temperature T-m. The crossover of current-voltage characteristics from ohmic-like behavior in range T-m/T-c to non-linear one below T-m is observed. Transport properties of the 'benchmark' composites Y3/4Lu1/4Ba2Cu3O7 + Y3Al5O12 are typical for network superconductor-insulator-superconductor Josephson junction. The behavior observed for Y3/4Lu1/4Ba2Cu3O7 + Y3Fe5O12 composites is attributed to peculiarities of supercurrent carriers tunnelling through ferrimagnetic barriers. (C) 2002 Elsevier Science Ltd. All rights reserved.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mikhailov A. A., Maksimova A. N., Moroz A. N., Gokhfeld D. M.
Заглавие : Temperature and dimensional dependence of the irreversibility field of a layered high-temperature superconductor
Колич.характеристики :6 с
Место публикации : Phys. At. Nucl. - 2022. - Vol. 85, Is. 10. - P.1652-1657. - ISSN 10637788 (ISSN), DOI 10.1134/S1063778822100398. - ISSN 1562692X (eISSN)
Примечания : Cited References: 23. - The work was supported by the “Prioritet-2030” program of National Research Nuclear University MEPhI
Аннотация: The Monte Carlo method was used in a 2D model of the layered HTSC to calculate the magnetization curves of a granulated high-temperature superconductor for various sizes of granules. In this approach magnetization of granules alone is taken into account, while the contribution of the gaps between granules is small and neglected. The irreversibility field has been found to decrease with temperature at the fixed size of granules and increase as the granule size increases at fixed temperature. The time dependence of residual magnetization has been studied at various temperatures. The relaxation rate is shown not to depend on the granule size at low temperatures but to decrease with the increasing size (provided that the granule size is less than 3 μm) at a high temperature when the magnetic flux creep becomes of importance.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gavrichkov V. A.
Заглавие : Superexchange in 2D perovskite HTSC with stripe nanostructure
Коллективы : "Functional materials", International conference, Крымский федеральный университет имени В.И. Вернадского
Место публикации : Ovchinnikov S. G. International conference "Functional materials": book of abstracts/ ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2021. - P.223-2224
Примечания : Библиогр.: 3 назв. - The reported study was supported by the grant RFFI 19-02-00034 and the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science according to the research project ”Studies of superexchange and electron-phonon interactions in correlated systems as a basis for searching for promising functional materials No. 20-42-240016.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Korshunov M. M.
Заглавие : Some devils in the details of pairing in Fe-based superconductors
Коллективы : Trilateral workshop on Hot Topics in HTSC: Fe-Based Superconductors (Sept. 29 – Oct. 2, 2013; Zvenigorod, Russia)
Место публикации : Trilateral workshop on Hot Topics in HTSC: Fe-Based Supercond. - 2013. - P.16
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Dubrovskii A. A., Popkov S. I., Shaikhutdinov K. A., Petrov M. I.
Заглавие : Relaxation of the remanent resistance of granular HTSC Y-Ba-Cu-O plus CuO composites after magnetic field treatment
Разночтения заглавия :авие SCOPUS: Relaxation of the remanent resistance of granular HTSC Y-Ba-Cu-O + CuO composites after magnetic field treatment
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 50, Is. 6. - P1014-1021. - ISSN 1063-7834, DOI 10.1134/S1063783408060036
Примечания : Cited References: 24
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTOR
TRANSPORT CURRENT
FLUX CREEP
YBA2CU3O7-DELTA
MAGNETORESISTANCE
PENETRATION
Аннотация: The hysteresis of magnetoresistance R(H) and relaxation of the remanent resistance R-rem with time after magnetic field treatment of HTSC (Y-Ba-Cu-O) + CuO composites are studied. Such a composite constitutes a network of Josephson junctions wherein the nonsuperconducting component (CuO) forms Josephson barriers between HTSC grains. By comparing the experimental R-rem(t) and R(H) dependences, it is shown that the relaxation of the remanent resistance is caused by the decreased magnetic field in the intergrain medium due to relaxation of magnetization. The reason is uncovered for the differences between the published values of pinning potentials determined by measuring the relaxation of magnetization or resistance and fitting them by the Anderson law.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Govorun I. V., Leksikov Al. A., Serzhantov A. M., Leksikov An. A.
Заглавие : Reflective power limiter for X-band with HTSC switching element
Место публикации : IEEE Trans. Appl. Supercond.: IEEE-Institute Electrical and Electronics Engineers, 2016. - Vol. 26, Is. 6. - Ст.1500506. - ISSN 1051-8223, DOI 10.1109/TASC.2016.2530700. - ISSN 1558-2515(eISSN)
Примечания : Cited References:23
Предметные рубрики: Superconducting transmission-line
Ключевые слова (''Своб.индексиров.''): microstrip structure--microwave (mw)--power limiter (pl)--transmission--zero
Аннотация: This paper presents a new type of power limiter (PL), using superconducting-to-normal state phase transition in high-temperature superconductor. The presented device differs from the existing ones mainly in the reflective principle of its operation. In fact, the PL is a three-resonator microstrip filter, whose resonators are configured and arranged in such a manner that coupling coefficient between the outer resonators is equal to zero and the inner one has a gap in the middle section shunted by a high-temperature superconducting (HTS) film element. In small-signal mode, the HTS element is in low-loss state, and the device is essentially a three-pole filter with low transmission loss. When the level of the signal exceeds the threshold, the HTS element transits to the high-loss state, and the Q-factor of the inner resonator falls, breaking the coupling in the structure. This leads to the corresponding increase in the PL's transmission loss due to reflection. The higher the level of incoming power, the more the Q-factor falls. The PL operating frequency is 8 GHz with 8.5% fractional bandwidth. It remains operable up to 40 W of input power, providing 38-dB limitation.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makarov I. A., Ovchinnikov S. G., Shneider E. I.
Заглавие : Reconstruction of the Fermi surface of HTSC cuprates in a high magnetic field
Коллективы : Russian Foundation for Basic Research [09-02-00127]; Siberian Branch and the Ural Division, Russian Academy of Sciences [40]; Presidium of the Russian Academy of Sciences [5.7]
Место публикации : JETP Letters. - 2009. - Vol. 89, Is. 12. - P.632-637. - ISSN 0021-3640, DOI 10.1134/S002136400912008X
Примечания : Cited References: 19. - This work was supported by the Russian Foundation for Basic Research (project no. 09-02-00127), the Siberian Branch and the Ural Division, Russian Academy of Sciences (integration project no. 40), and the Presidium of the Russian Academy of Sciences (program no. 5.7).
Предметные рубрики: T-J MODEL
COPPER OXIDES
ELECTRON
SPECTRUM
BAND
Аннотация: The effect of a high magnetic field on the electronic structure of HTSC cuprates is considered. The study is performed in the t-t'-taEuro(3)-J* model, and the high magnetic field effect is taken into account not only as the Zeeman splitting of the one-electron levels, but also in the occupation numbers of the states with different spin projections and in the formation of the spin correlation functions. The field is assumed to be high enough to align all of the spins along the field. As a result, the Fermi surface reconstruction is obtained from four hole pockets about the nodal point (pi/2, pi/2) in the paramagnetic phase to a large hole pocket about the point (pi, pi) in the ferromagnetic phase. As the magnetic field strength decreases, a number of quantum phase transitions are revealed; they are manifested in the changed Fermi surface topology. The Fermi surface reconstruction with a decreasing field is qualitatively the same as that with an increasing doping degree in the absence of a magnetic field.
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