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    Исследование функционирования микрополоскового устройства защиты с ВТСП элементом в режимах повышенной мощности и кратковременных импульсов / И. В. Говорун [и др.] // Изв. вузов. Физика. - 2015. - Т. 58, № 8/2. - С. 126-128. - Библиогр.: 2. - Работа выполнена при поддержке Министерства образования и науки РФ, соглашение №14-607-21-0039 . - ISSN 0021-3411
   Перевод заглавия: Investigation of operation of microstrip HTSC based power limiter in high power and short pulses modes
Кл.слова (ненормированные):
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.

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Говорун, Илья Валерьевич; Govorun, I. V.; Лексиков, Александр Александрович; Leksikov, Al. A.; Лексиков, Андрей Александрович; Leksikov, An. A.; Сержантов, Алексей Михайлович; Serzhantov, A. M.
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Transport properties of HTSC-based composites: Modeling the random networks of Josephson weak links with magneto-active barriers. / K. A. Shaihutdinov [et al.] // J. Low Temp. Phys. - 2003. - Vol. 130, Is. 3-4. - P. 347-381, DOI 10.1023/A:1022204705059. - Cited References: 89 . - ISSN 0022-2291

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
CURRENT-VOLTAGE CHARACTERISTICS
   HIGH-TEMPERATURE SUPERCONDUCTORS
   SNS JUNCTIONS
   THERMAL FLUCTUATIONS
   RESISTIVE PROPERTIES
   PERCOLATION SYSTEM
   TRANSITION
   YBA2CU3O7
   BOUNDARY
   OXIDES
Кл.слова (ненормированные):
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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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian St. Aerosp. Univ., Krasnoyarsk 660014, Russian Federation
Krasnoyarsk State University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shaihutdinov, K. A.; Balaev, D. A.; Балаев, Дмитрий Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович; NATO Advanced Research Workshop on Vortex Dynamics in High-Temperature Superconductors(2002 ; May ; 17-22)
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Transport properties of HTSC plus Ba(Pb, Met)O-3 composites as functions of the electrical and magnetic characteristics of nonsuperconducting components / M. I. Petrov [et al.] // Phys. Solid State. - 2000. - Vol. 42, Is. 5. - P. 810-815, DOI 10.1134/1.1131294. - Cited References: 27 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
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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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Оспищев С. В.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
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    Transition between large and small polaron states in the electronic structure of HTSC cuprates / I. A. Makarov [et al.] // J. Supercond. Nov. Magn. - 2016. - Vol. 29, Is. 4. - P. 1063-1068, DOI 10.1007/s10948-016-3375-8. - 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. . - ISSN 1557-1939. - ISSN 1557-1947
   Перевод заглавия: Переход между состояниями большого и малого полярона в электронной структуре ВТСП купратов

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
SUPERCONDUCTIVITY
Кл.слова (ненормированные):
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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Доп.точки доступа:
Makarov, I. A.; Макаров, Илья Анатольевич; Shneyder, E. I.; Шнейдер, Елена Игоревна; Kozlov, P. A.; Козлов, Пётр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; RFBR [13-02-01395 a, 14-02-31677 mol_a]
}
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Kozlov, P. A.
Transition Between Large and Small Polaron States in the Electronic Structure of HTSC Cuprates / P. A. Kozlov, I. A. Makarov, S. G. Ovchinnikov // 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. - References: 3 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
cuprates -- strong electron correlations -- electron-phonon interaction -- polaron -- Franck-Condon

Доп.точки доступа:
Makarov, I. A.; Макаров, Илья Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Козлов, Пётр Александрович; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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Time relaxation of residual resistance of HTSC-based composites / D. A. Balaev [et al.] // Physica C. - 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P. 1309-1310, DOI 10.1016/j.physc.2007.03.347. - Cited References: 5 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
SUPERCONDUCTORS
Кл.слова (ненормированные):
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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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
}
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Time relaxation of residual resistance of HTSC-based composites / D. A. Balaev [et al.] // Physica C-Superconductivity and its Applications. - 2007. - Т.460-462 II, spec. iss. - P. 1309-1310, DOI 10.1016/j.physc.2007.03.347 . - ISSN 0921-4534

РИНЦ
Держатели документа:
Kirensky Institute of Physics

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
}
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Thermally activated phase slippage in composites HTSC + CuO / M. I. Petrov [et al.] // Physica C-Superconductivity and its Applications. - 1997. - Vol. 282, Is. PART 4. - P. 2453-2454 . - ISSN 0921-4534
Кл.слова (ненормированные):
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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Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Balaev, D. A.; Балаев, Дмитрий Александрович; Шайхутдинов, Кирилл Александрович; Shaikhutdinov, K. A.; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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The synthesis, microstructure, transport and magnetic properties of Bi-based low density HTSC [Text] / M. I. Petrov [et al.] // J. Mater. Process. Technol. - 2005. - Vol. 161, Is. 1-2. - P58-61, DOI 10.1016/j.jmatprotec.2004.07.056. - Cited Reference Count: 4 . - APR 10. - ISSN 0924-0136
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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Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Tetyueva, T. N.; Kveglis, L. I.; Квеглис, Людмила Иосифовна; Efremov, A. A.; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Zeer, E. P.; Зеер, Эвальд Петрович; Japanese/Mediterranean Workshop on Applied Electronmagnetic Engineering for Magnetic and Superconducting Materials/3rd Superconducting Flywheel Workshop(3rd ; MAY 19-21, 2003 ; Athens, GREECE)
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10.

Avramov, P. V.
The strong electron correlation effects in XAFS spectra of HTSC cuprates / P. V. Avramov, S. G. Ovchinnikov // 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. - Cited References: 11 . - ISSN 1155-4339

РУБ Physics, Multidisciplinary
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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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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11.

The effect of magnetization relaxation of superconducting grains on time evolution of the resistance of granular HTSC in constant applied magnetic field / Dubrovskiy A.A., Balaev D.A., Shaykhutdinov K.A., Popkov S.I., Petrov M.I. // 25 International conftrence on low temperature physics. - 2008. - P298

Доп.точки доступа:
Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович; International Conference on Low Temperature Physics(25 ; 2008 ; Aug. 6-13 ; Amsterdam, Netherlands)
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12.

The effect of magnetisation relaxation of superconducting grains on time relaxation of the resistance of granular HTSC in constant applied magnetic field / D. A. Balaev [et al.] // Journal of Physics: Conference Series. - 2009. - Т. 150, № 5. - P052012, DOI 10.1088/1742-6596/150/5/052012 . - ISSN 1742-6588

ГРНТИ

29.19

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Держатели документа:
Kirensky Institute of Physics SB RAS
Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
}
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13.

The effect of heat treatment on the transport properties of the polycrystalline HTSC / M. I. Petrov [et al.] // Physica C-Superconductivity and its Applications. - 1994. - Vol. 235-240, Is. 5. - P. 3043-3044, DOI 10.1016/0921-4534(94)91048-0. - Cited References: 6 . - ISSN 0921-4534

РУБ Physics, Applied

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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Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Balaev, D. A.; Балаев, Дмитрий Александрович; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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14.

The effect of ferrimagnetic ordering in insulating component of composites HTSC plus Yttrium Iron Garnet on its transport properties / D. A. Balaev [et al.] // Solid State Commun. - 2003. - Vol. 125, Is. 5. - P. 281-285, DOI 10.1016/S0038-1098(02)00602-6. - Cited References: 34 . - ISSN 0038-1098

РУБ Physics, Condensed Matter
Рубрики:
SUPERCONDUCTOR
TRANSITION
CURRENTS
Кл.слова (ненормированные):
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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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Shaihutdinov, K. A.; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
}
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15.

Temperature and dimensional dependence of the irreversibility field of a layered high-temperature superconductor / A. A. Mikhailov, A. N. Maksimova, A. N. Moroz, D. M. Gokhfeld // Phys. At. Nucl. - 2022. - Vol. 85, Is. 10. - P. 1652-1657, DOI 10.1134/S1063778822100398. - Cited References: 23. - The work was supported by the “Prioritet-2030” program of National Research Nuclear University MEPhI . - ISSN 1063-7788. - ISSN 1562-692X
Кл.слова (ненормированные):
granulated HTSC -- Monte Carlo method -- irreversibility field -- relaxation of residual magnetization
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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Публикация на русском языке Температурная и размерная зависимость поля необратимости слоистого высокотемпературного сверхпроводника [Текст] / А. А. Михайлов, А. Н. Максимова, А. Н. Мороз, Д. М. Гохфельд. - 6 с. // Яд. физ. и инжиниринг. - 2024. - Т. 14 № 4. - С. 339-344

Держатели документа:
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Moscow, Russia
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Mikhailov, A. A.; Maksimova, A. N.; Moroz, A. N.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович
}
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16.

Gavrichkov, V. A.
Superexchange in 2D perovskite HTSC with stripe nanostructure / V. A. Gavrichkov // International conference "Functional materials" : book of abstracts / ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2021. - P. 223-2224. - 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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Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Ovchinnikov, S. G. \org. com.\; Овчинников, Сергей Геннадьевич; Гавричков, Владимир Александрович; "Functional materials", International conference(2021 ; Oct. 4-8 ; Alushta, Russia); Крымский федеральный университет имени В.И. Вернадского
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17.

Korshunov, M. M.
Some devils in the details of pairing in Fe-based superconductors / M. M. Korshunov // Trilateral workshop on Hot Topics in HTSC: Fe-Based Supercond. - 2013. - P. 16

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Доп.точки доступа:
Коршунов, Максим Михайлович; Trilateral workshop on Hot Topics in HTSC: Fe-Based Superconductors (Sept. 29 – Oct. 2, 2013 ; Zvenigorod, Russia)
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18.

Relaxation of the remanent resistance of granular HTSC Y-Ba-Cu-O plus CuO composites after magnetic field treatment / D. A. Balaev [et al.] // Phys. Solid State. - 2008. - Vol. 50, Is. 6. - P. 1014-1021, DOI 10.1134/S1063783408060036. - Cited References: 24 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
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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Держатели документа:
[Balaev, D. A.
Dubrovskii, A. A.
Popkov, S. I.
Shaikhutdinov, K. A.
Petrov, M. I.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Popkov, S. I.; Попков, Сергей Иванович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович
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19.

Reflective power limiter for X-band with HTSC switching element / B. A. Belyaev [et al.] // IEEE Trans. Appl. Supercond. - 2016. - Vol. 26, Is. 6. - Ст. 1500506, DOI 10.1109/TASC.2016.2530700. - Cited References:23 . - ISSN 1051-8223. - ISSN 1558-2515

РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
Superconducting transmission-line
Кл.слова (ненормированные):
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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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660074, Russia.

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Govorun, I. V.; Говорун, Илья Валерьевич; Leksikov, Al. A.; Лексиков, Александр Александрович; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Leksikov, An. A.; Лексиков, Андрей Александрович
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20.

Makarov, I. A.
Reconstruction of the Fermi surface of HTSC cuprates in a high magnetic field / I. A. Makarov, S. G. Ovchinnikov, E. I. Shneider // JETP Letters. - 2009. - Vol. 89, Is. 12. - P. 632-637, DOI 10.1134/S002136400912008X. - 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). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
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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Держатели документа:
[Makarov, I. A.
Ovchinnikov, S. G.
Shneider, E. I.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Shneider, E. I.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Shneider, E. I.; Шнейдер, Елена Игоревна; Макаров, Илья Анатольевич; 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]
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