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Quantum interference in HTSC-ceramics of system Tl-Ca-Ba-Cu-O / D. A. Velikanov [и др.] // Izvestiya vysshikh uchebnykh zavedenii Fizika. - 1990. - Vol. 33, Is. 9. - P. 26-29 ; Russian Physics Journal ; Известия высших учебных заведений. Физика. - Cited References: 13 . - ISSN 0021-3411

РУБ Physics, Multidisciplinary
Рубрики:
RF SQUID
   DC-SQUID
   TEMPERATURE
   SUPERCONDUCTOR
   OPERATION

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Доп.точки доступа:
Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Volkov, V. Y.

}
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Patrin, G. S.
Detection of magneto-dependent higher harmonics in htsc ceramics via the change of the low field microwave response under the passing of an alternating-current / G. S. Patrin, G. A. PETRAKOVSKII, I. E. KHARITONOV // Phys. Lett. A. - 1991. - Vol. 158, Is. 3-4. - P. 167-170, DOI 10.1016/0375-9601(91)90921-T. - Cited References: 15 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
BA-CU-O
GENERATION
STATE
Аннотация: The results of an investigation on the generation of higher harmonics under the passing of a low frequency current in HTSC ceramics by microwave spectroscopy methods are presented. It is found that the generation of only even harmonics occurs. The dependence of the signal upon the harmonic number and. as an example for the second harmonic, the temperature dependences of the microwave response parameters are discussed.

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Доп.точки доступа:
PETRAKOVSKII, G. A.; Петраковский, Герман Антонович; KHARITONOV, I. E.; Патрин, Геннадий Семёнович
}
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Polskii, A. I.
Determination of volume of superconducting phase of htsc materials by uh method / A. I. Polskii, V. M. Popel // Pisma Zhurnal Tek. Fiz. - 1991. - Vol. 17, Is. 3. - P. 37-40. - Cited References: 2 . - ISSN 0320-0116

РУБ Physics, Applied

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Доп.точки доступа:
Popel, V. M.
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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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   В36


    Critical currents of polycrystalline HTSC with 1-2-3 structure undergone the heat treatment [Preprint] : препринт. № 752Ф / M. I. Petrov [et al.]. - Krasnoyarsk, 1994. - 13 p. - Refereces.: 9 назв. - 70 экз. -

ГРНТИ

29.19.29

29.19.23

29.19.31

Держатели документа:
Библиотека Института физики им. Л. В. Киренского СО РАН
Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Russian Academy of Sciences; Siberian Branch RAS; Kirensky Institute of Physics
Свободных экз. нет}
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VALKOV, V. V.
MAGNETIZATION OF GRANULATED HTSC IN INTENSE MAGNETIC-FIELDS / V. V. VALKOV, B. P. KHRUSTALEV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1995. - Vol. 107, Is. 4. - P. 1221-1231. - Cited References: 18 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
CRITICAL-STATE MODEL
HIGH-TEMPERATURE SUPERCONDUCTORS
HIGH-TC SUPERCONDUCTORS

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Доп.точки доступа:
KHRUSTALEV, B. P.
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Avramov, P. V.
Non-diagram transitions in polarized X-ray absorption CuL(3) spectra of HTSC-ceramics / P. V. Avramov, S. G. Ovchinnikov // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 11. - P. 3226-3240. - Cited References: 28 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TC SUPERCONDUCTIVITY
   LA2CUO4
   ALPHA
   SATELLITES
   STATES
   OXIDES
   XANES

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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Critical currents in composites HTSC plus semiconductor at different concentrations of carriers / M. I. Petrov [et al.] // Dokl. Akad. Nauk. - 1996. - Vol. 346, Is. 5. - P. 616-618. - Cited References: 7 . - ISSN 0869-5652

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Публикация на русском языке Критический ток в композитах ВТСП + полупроводник с различной концентрацией носителей [Текст] / М. И. Петров [и др.] // Доклады Академии наук. - 1996. - Т. 346 № 5. - С. 616-618

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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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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10.

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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11.

Effect of thermal fluctuations on the resistive properties of HTSC+CuO composites / M. I. Petrov [et al.] // Phys. Solid State. - 1997. - Vol. 39, Is. 11. - P. 1749-1750, DOI 10.1134/1.1130163. - Cited References: 11 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
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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Держатели документа:
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Br. Russ. Acad. of Sci., 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Khrustalev, B. P.; Хрусталев, Борис Петрович
}
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12.

Influence of magnetic scattering centers in the insulator component of the composite HTSC+Cu1-xNixO on its resistive properties / M. I. Petrov [et al.] // Phys. Solid State. - 1998. - Vol. 40, Is. 9. - P. 1451-1455, DOI 10.1134/1.1130601. - Cited References: 31 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
PLUS SEMICONDUCTOR
CUO
Аннотация: We present results of an experimental study of the effect of magnetic scattering centers (nickel) in the insulator component (cuprous oxide) of the composite HTSC+Cu1-xNixO on its transport properties. A suppression of the superconducting properties of this system is observed to take place with increasing nickel content. The results are analyzed within the framework of the model of strong electron correlations. (C) 1998 American Institute of Physics. [S1063-7834(98)00609-1].

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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13.

Applicability of the theory based on Andreev reflection to the description of experimental current-voltage characteristics of polycrystalline HTSC plus normal metal composites / M. I. Petrov [et al.] // Physica C. - 1999. - Vol. 314, Is. 1-2. - P. 51-54, DOI 10.1016/S0921-4534(99)00151-3. - Cited References: 19 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
WEAK LINKS
JUNCTIONS
FILMS
Кл.слова (ненормированные):
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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Держатели документа:
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Ospishchev, S. V.; Оспищев С. В.; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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14.

Influence of transport current and thermal fluctuations on the resistive properties of HTSC+CuO composites / M. I. Petrov [et al.] // Physics of the Solid State. - 1999. - Vol. 41, Is. 6. - P. 881-886 . - ISSN 1063-7834
Аннотация: Measurements of the temperature dependence of the electrical resistance R(T) below the superconducting transition temperature have been performed at different values of the transport current in HTSC+CuO composites modeling a network of weak S - I - S Josephson junctions (S - superconductor, I - insulator). It has been shown experimentally that the temperature dependence R(T) at different values of the transport current is adequately described by means of the mechanism of thermally activated phase slippage developed by Ambegaokar and Halperin for tunnel structures. Within the framework of this model we have numerically calculated the temperature dependence of the critical current J c(T) as defined by various criteria. Qualitative agreement obtains between the measured and calculated temperature dependences J c(T). В© 1999 American Institute of Physics.

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Публикация на русском языке Влияние транспортного тока и тепловых флуктуаций на резистивные свойства композитов ВТСП+CuO [Текст] / М. И. Петров [и др.] // Физ. тверд. тела. - 1999. - Т. 41 Вып. 6. - С. 969-974

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Balaev, D. A.; Балаев, Дмитрий Александрович; Шайхутдинов, Кирилл Александрович; Shaikhutdinov, K. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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15.

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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16.

A comparative study of transport properties of composites HTSC+MgTiO3 and HTSC + NiTiO3. The effect of paramagnetic NiTiO3 / M. I. Petrov, D. A. Balaev, K. A. Shaikhutdinov, K. S. Aleksandrov // Physica C-Superconductivity and its Applications. - 2000. - Vol. 341-348, Pt. 3. - P. 1863-1864, DOI 10.1016/S0921-4534(00)01217-X . - ISSN 0921-4534
Кл.слова (ненормированные):
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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Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; International conference on materials and mechanisms of superconductivity high temperature superconductors(6 ; 2000 ; Feb. ; 20-25 ; Houston, Texas, USA)
}
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17.

Anomalous transport properties of a paramagnetic NiTiO3+HTSC two-phase system representing a random Josephson junction network / M. I. Petrov [et al.] // JETP Letters. - 2002. - Vol. 75, Is. 3. - P. 138-141, DOI 10.1134/1.1469500. - Cited References: 23 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
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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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович
}
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18.

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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19.

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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20.

Andreev reflections and experimental current-voltage characteristics of break junctions of polycrystalline HTSC / M. I. Petrov [et al.] // Physica C. - 2004. - Vol. 408: 7th International Conference on Materials and Mechanisms of Superconductive and High Temperature Superconductors (MAY 25-30, 2003, Rio de Janeiro, BRAZIL). - P. 620-622, DOI 10.1016/j.physc.2004.03.085. - Cited References: 3 . - ISSN 0921-4534

РУБ Physics, Applied

Кл.слова (ненормированные):
Andreev reflections -- break junction -- current-voltage characteristics -- Andreev reflections -- Break junction -- Current-voltage characteristics -- Andreev reflections -- Break junctions -- Elastic scattering -- Lattice defects -- Negative differential resistance -- Electric fields -- Heuristic methods -- Hysteresis -- Microcracks -- Polycrystalline materials -- Probability density function -- Quasicrystals -- Superconducting materials -- Yttrium barium copper oxides -- Current voltage characteristics
Аннотация: The temperature evolution of current-voltage characteristics (CVCs) of break junctions made from polycrystalline Y0.75Lu0.25Ba2Cu3O7 and La1.85Sr0.15CuO4 is investigated. The experimental CVCs have hysteretic features that reflect a part of a curve with negative differential resistance. The temperature evolution of the CVCs is discussed within the framework of the Kummel-Gunsenheimer-Nicolsky theory for superconductor/normal-metal/superconductor junctions considering multiple Andreev reflections. It is shown that the shape of the CVCs of break junctions is determined by the ratio of the number of "short" and "long" intergrain normal regions in the polycrystalline HTSC under investigation. (C) 2004 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany
ИФ СО РАН
Kirensky Intitute of Physics, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Reshetnev Siberian Stt. Aerosp. U., 660014 Krasnoyarsk, Russian Federation
Inst. fur Theor. Phys./Astrophys., Universitat Wurzburg, D-97074 Wurzburg, Germany

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaihutdinov, K. A.; Kummel, R.
}
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