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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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    Bis(μ3-barbiturato−O,O,O′)-(μ2-aqua)- aqua-barium(II): crystal structure, spectroscopic and thermal properties / L. A. Solovyov [et al.] // J. Coord. Chem. - 2017. - Vol. 70, Is. 12. - P. 1984-1993, DOI 10.1080/00958972.2017.1319943. - Cited References: 21 . - ISSN 0095-8972
   Перевод заглавия: Бис(μ3-барбитурат-O,O,O')-(μ2-аква)-аква-бария(II): Кристаллическая структура, спектроскопические и термические свойства
Кл.слова (ненормированные):
Barbituric acid -- barium -- coordination compound -- X-ray diffraction -- infrared spectroscopy -- thermal analysis
Аннотация: A polymeric coordination compound, [Ba(H2O) 2(Hba)2] (1) (H2ba – barbituric acid, C4H4N2O3), was obtained. The structure of 1 was solved using powder X-ray diffraction methods. The Ba2+ ion in 1 formed a three-capped trigonal prism. The BaO9 polyhedra, connected with each other by the edges and faces, formed a chain. Several 4- and 12-membered cycles due to the bridging μ2-H2O and bridging μ3-Hba– also formed implementing a 3-D polymer structure. The structures of 1 and other thiobarbiturate complexes were compared. The replacement of a S atom by an O atom in the heterocyclic ligand Htba− (thiobarbiturate ion) of the compound Ba(H2O)2(Htba)2 resulted in changes of the coordination number Ba(II) and supramolecular structure. The intermolecular hydrogen bonds O–H⋯O and N–H⋯O formed a 3-D net where pronounced 2-D layers of Hba– ions could be found. A new topological net in 1 was observed. The IR and thermal stability were investigated.

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Держатели документа:
Institute of Chemistry and Chemical Technology, SB RAS, FRC “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Department of Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation

Доп.точки доступа:
Solovyov, L. A.; Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lesnikov, M. K.
}
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    Cerenkov nonlinear diffraction of femtosecond pulses / A. M. Vyunishev [et al.] // J. Opt. Soc. Am. B. - 2013. - Vol. 30, Is. 7. - P. 2014-2021, DOI 10.1364/JOSAB.30.002014. - Cited References: 43. - The work was partially supported by the Grant of the President of the Russian Federation MK-250.2013.2, by RFBR through Grant No. 12-02-31167, by the Ministry of Education and Science of the Russian Federation (Contract No. 14.B37.21.0730), by Krasnoyarsk Regional Fund of Science and Technical Activity Support, by PSB RAS Project 2.5.2, and by SFU Grant F12. . - ISSN 0740-3224
   Перевод заглавия: Черенковская нелинейная дифракция фемтосекундных импульсов

РУБ Optics
Рубрики:
STRONTIUM BARIUM NIOBATE
   2ND-HARMONIC GENERATION
   PHOTONIC CRYSTAL
   DOMAIN-WALLS
   MODULATION
Аннотация: Cerenkov nonlinear diffraction of femtosecond pulses in one-dimensional nonlinear photonic crystal of strontium tetraborate was studied theoretically and experimentally in both frequency and time domains. Spectral features of second harmonic radiation were measured in the course of mapping the nonlinear photonic crystal structure. The local second harmonic spectrum demonstrates complex angular behavior within the beam cross section. The spectral width of the second harmonic radiation is found to be fundamental beam size-dependent, and optimal focusing should be used for exact conversion of the fundamental spectrum into the second harmonic one. Experimental results are in excellent agreement with calculations. Maximum second harmonic generation efficiency was up to 2.1% at pumping by a femtosecond oscillator. (C) 2013 Optical Society of America

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660079, Russia

Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zaitsev, A. I.; Зайцев, Александр Иванович; Slabko, V. V.; Слабко, Виталий Васильевич
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Contributions from Inter-grain Boundaries to the Magneto-resistive Effect in Polycrystalline High-T (C) Superconductors. The Underlying Reason of Different Behavior for YBCO and BSCCO Systems / D. A. Balaev [et al.] // J. Supercond. Nov. Magn. - 2011. - Vol. 24, Is. 7. - P. 2129-2136, DOI 10.1007/s10948-011-1166-9. - Cited References: 30. - This work is supported by program N5 of RAS, project N7. . - ISSN 1557-1939

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   PHASE-SLIP
   TRANSPORT-PROPERTIES
   TRANSITION
   FIELD
   COMPOSITES
   BULK
   TAPES
   YBA2CU3O7-DELTA
   DISSIPATION
Кл.слова (ненормированные):
BSCCO -- YBCO -- Intergrain boundaries -- Magnetoresistance -- BSCCO -- Intergrain boundaries -- Magnetoresistance -- YBCO -- BSCCO -- BSCCO system -- Comparative studies -- High Tc superconductors -- High-field -- Inter-grain -- Irreversibility lines -- Magneto-resistive effect -- Polycrystalline -- Resistive transition -- Standard measurements -- Weak pinning -- YBCO -- Bismuth -- Electric resistance -- Grain boundaries -- High temperature superconductors -- Lead -- Magnetic fields -- Magnetoelectronics -- Magnetoresistance -- Magnetos -- Superconductivity -- Yttrium barium copper oxides -- Semiconductor metal boundaries
Аннотация: In order to clarify the mechanisms in charge of broadening of resistive transition R(T) in magnetic fields of bismuth-based polycrystalline high-T (C) superconductor (HTSC), a comparative study of Bi1.8Pb0.3Sr1.9Ca2Cu3O (x) (BSCCO) and YBa2Cu3O7-delta (YBCO) have been performed. Magnetoresistive effects and irreversibility line obtained from magnetic measurements have been studied. It was established that (1) for YBCO, the smooth part of R(T) dependence unambiguously corresponds to dissipation in the intergrain boundaries for arbitrary magnetic fields; (2) for polycrystalline BSCCO, the smooth part of R(T) dependences correspond to dissipation within intergrain boundary subsystem in the field range H <10(2) Oe only, while standard measurements of R(T) dependences in magnetic field range H > 10(2) Oe reflect the dissipation processes occurring both in intergrain boundary and HTSC grain subsystems; (3) for the high-field range, the contribution from intergrain boundaries of BSCCO can be distinguished from magnetoresistance R(H) dependences obtained at high enough current density on textured samples. It is proposed that various magneto-resistive properties of these classical HTSC systems are due comparatively weak pinning in BSCCO.

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Держатели документа:
[Balaev, D. A.
Popkov, S. I.
Semenov, S. V.
Bykov, A. A.
Dubrovskiy, A. A.
Shaikhutdinov, K. A.
Petrov, M. I.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Balaev, D. A.
Popkov, S. I.
Sabitova, E. I.
Dubrovskiy, A. A.
Shaikhutdinov, K. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Semenov, S. V.; Семенов, Сергей Васильевич; Bykov, A. A.; Быков, Алексей Анатольевич; Sabitova, E. I.; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович
}
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Gokhfeld, D. M.
Description of hysteretic current-voltage characteristics of superconductor-normal metal-superconductor junctions / D. M. Gokhfeld // Supercond. Sci. Technol. - 2007. - Vol. 20, Is. 1. - P. 62-66, DOI 10.1088/0953-2048/20/1/011. - Cited References: 24 . - ISSN 0953-2048

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTOR
   WEAK LINKS
   POLYCRYSTALLINE HTSC
   ANDREEV REFLECTION
   SIMPLIFIED MODEL
   COMPOSITES
   TRANSPORT
Кл.слова (ненормированные):
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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Держатели документа:
RAS, SD, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L V Kirensky Institute of Physics, SD RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Гохфельд, Денис Михайлович
}
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Effect of strontium and barium doping on the magnetic state and electrical conductivity of GdCoO3 / N. B. Ivanova [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 8. - P. 1498-1506, DOI 10.1134/S1063783407080161. - Cited References: 36 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
PEROVSKITE
   ORDER
   OXIDE
   BEHAVIOR
   GLASSES
   LACOO3
   PR
   GD
   SM
   ND
Аннотация: A coordinated investigation of the magnetic and electrical properties of polycrystalline cobalt oxide compounds CdCoO3, Gd0.9Ba0.1CoO3, and Gd0.9Sr0.1CoO3 is carried out. Undoped GdCoO3 reveals a low conductivity; a magnetic moment of 7.4 mu(B) per molecule, which is less than the theoretical value for the Gd3+ ion; and an asymptotic Curie temperature of -6 K. Doping GdCoO3 with barium and strontium to substitution of 10 at. % Gd brings about an increase in the conductivity and magnetic transitions at T = 300 K for Gd0.9Ba0.1CoO3 and T = 170 K for Gd0.9Sr0.1CoO3. The magnetization anomalies imply the formation of magnetic clusters. The behavior of the electrical conductivity at high temperatures suggests a variable activation energy. At low temperatures, Mott hopping conduction sets in.

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Публикация на русском языке Влияние допирования стронцием и барием на магнитное состояние и электропроводность GdCoO[3] [Текст] / Н. Б. Иванова [и др.] // Физ. тверд. тела. - 2007. - Т. 49 Вып. 8. - С. 1427-1435

Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Univ Guadalajara, CUCEI, Dept Fis, Guadalajara 44430, Jalisco, Mexico
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Departmento de Fisica, C.U.C.E.I., Universidade de Guadalajara, Guadalajara, Jalisco 44430, Mexico

Доп.точки доступа:
Ivanova, N. B.; Иванова, Наталья Борисовна; Kazak, N. V.; Казак, Наталья Валерьевна; Michel, C. R.; Balaev, A. D.; Балаев, Александр Дмитриевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Bulina, N. V.; Булина, Наталья Васильевна; Panchenko, E. B.
}
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Electronic Structure of p-Type La1-xMx2+MnO3 Manganites in the Ferromagnetic and Paramagnetic Phases in the LDA plus GTB Approach / V. A. Gavrichkov [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 5. - P. 860-876, DOI 10.1134/S1063776111030101. - Cited References: 47. - This study was supported financially by integration project no. 40 of the Ural and Siberian Branches of the Russian Academy of Sciences, the program "Strong Electron Correlations" of the Russian Academy of Sciences, and the Russian Foundation for Basic Research (project no. 10-02-00251-a). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
DOUBLE-EXCHANGE
   COLOSSAL MAGNETORESISTANCE
   THIN-FILMS
   PHYSICS
   LA1-XSRXMNO3
   RESISTIVITY
   SEPARATION
   TRANSPORT
   MODEL
Кл.слова (ненормированные):
Complex structure -- Cubic materials -- Ferromagnetic phase -- Half metals -- Jahn Teller effect -- Metal properties -- Metal types -- Orbitals -- P-type -- Paramagnetic phase -- Paramagnetic phasis -- Quasi particles -- Spectral intensity -- Spin projections -- Strong electron correlations -- Barium -- Density functional theory -- Electron correlations -- Electron density measurement -- Electronic properties -- Electronic structure -- Fermi level -- Ferromagnetic materials -- Ferromagnetism -- Manganese oxide -- Manganites -- Paramagnetic materials -- Paramagnetism -- Valence bands -- Lanthanum
Аннотация: The band structure, spectral intensity, and position of the Fermi level in doped p-type La1-xMx2+ MnO3 manganites (M = Sr, Ca, Ba) is analyzed using the LDA + GBT method for calculating the electronic structure of systems with strong electron correlations, taking into account antiferro-orbital ordering and using the Kugel-Khomskii ideas and real spin S = 2. The results of the ferromagnetic phase reproduce the state of a spin half-metal with 100% spin polarization at T = 0, when the spectrum is of the metal type for a quasiparticle with one spin projection and of the dielectric type for the other. It is found that the valence band becomes approximately three times narrower upon a transition to the paramagnetic phase. For the paramagnetic phase, metal properties are observed because the Fermi level is located in the valence band for any nonzero x. The dielectrization effect at the Curie temperature is possible and must be accompanied by filling of d(x) orbitals upon doping. The effect itself is associated with strong electron correlations, and a complex structure of the top of the valence band is due to the Jahn-Teller effect in cubic materials. DOI: 10.1134/S1063776111030101

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Публикация на русском языке Электронная структура манганитов La[1-x]M[x]2+MnO[3] p-типа в ферромагнитной и парамагнитной фазах в рамках LDA+GTB-подхода [Текст] / В. А. Гавричков [и др.] // Журнал экспериментальной и теоретической физики. - 2011. - Т. 139 Вып. 5. - С. 983-1000

Держатели документа:
[Gavrichkov, V. A.
Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Gavrichkov, V. A.
Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Nekrasov, I. A.] Russian Acad Sci, Ural Branch, Inst Electrophys, Ekaterinburg 620016, Russia
[Pchelkina, Z. V.] Russian Acad Sci, Ural Branch, Inst Met Phys, Ekaterinburg 620990, Russia
ИФ СО РАН
Siberian Branch, Kirensky Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Ural Branch, Institute of Electrophysics, Russian Academy of Sciences, Yekaterinburg, 620016, Russian Federation
Ural Branch, Institute of Metal Physics, Russian Academy of Sciences, Yekaterinburg, 620990, Russian Federation

Доп.точки доступа:
Gavrichkov, V. A.; Гавричков, Владимир Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Nekrasov, I. A.; Pchelkina, Z. V.
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    Features of Raman spectra in barium titanate pressed powder / I. V. Zaytseva [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. - 2019. - Vol. 699, Is. 1. - Ст. 012058, DOI 10.1088/1757-899X/699/1/012058. - Cited References: 16. - The reported study was funded by RFBR according to the research projects No. 19-42-543-016 and 18-02-00399 and State assignment No AAAA-A17-117052410033-9. The experiments were performed in the multiple-access centre “High-Resolution Spectroscopy of Gases and Condensed Matter” in IA&E SBRAS (Novosibirsk, Russia) and Centre for Common Use of the Krasnoyarsk Scientific Centre, SBRAS (Krasnoyarsk, Russia). . - ISSN 1757-8981. - ISSN 1757-899X
   Перевод заглавия: Особенности спектров комбинационного рассеяния в прессованном порошке титаната бария
Аннотация: Raman spectra in barium titanate powder under non-hydrostatic pressures are presented. The relationship between the pressure (up to 11 GPa) and the shift and the width of E(TO)-phonon line has been established. It has been found that under the action of uniaxial pressure a new Raman peak arises in the vicinity of 100 cm−1. It is shown that the Raman shift and width of both peaks increase depending on the applied pressure. These Raman lines broadening may be associated with an increase of the concentration of defect states in the volume of the sample.

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Держатели документа:
Institute of Automation and Electrometry SB RAS, 630090 Novosibirsk, Russia
Kirensky Institute of Physics Federal Research Centre KSC SB RAS, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Zaytseva, I. V.; Pugachev, A. M.; Surovtsev, N. V.; Krylov, A. S.; Крылов, Александр Сергеевич; SPM-2019-RCWDFM Joint International Conference (3rd International Conference "Scanning Probe Microscopy" (SPM), the 4th Russia-China Workshop on Dielectric and Ferroelectric Materials (RCWDFM), and International Youth Conference "Functional Imaging of Nanomaterials")(25-28 August 2019 ; Ekaterinburg, Russia)
}
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Flux pinning docking interfaces in satellites using superconducting foams as trapped field magnets / M. R. Koblischka, A. Koblischka-Veneva, D. Gokhfeld [et al.] // IEEE Trans. Appl. Supercond. - 2022. - Vol. 32, Is. 4. - Ст. 4900105, DOI 10.1109/TASC.2022.3147734. - Cited References: 44. - This work was supported in part by SUPERFOAM international project funded by ANR and DFG under Grants ANR-17-CE05-0030 and DFG-ANR Ko2323-10. . - ISSN 1051-8223. - ISSN 1558-2515

РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
BULK
RECONFIGURATION
MAGNETIZATION
Кл.слова (ненормированные):
Superconducting magnets -- Satellites -- Yttrium barium copper oxide -- Magnetomechanical effects -- Magnetic fields -- Superconducting coils -- Magnetometers -- Flux-pinning docking interface -- Foams -- Trapped field magnets -- YBCO
Аннотация: Flux-Pinning Docking Interfaces (FPDI) in satellite systems were developed using bulk superconductors and permanent magnets in previous works. However, such FPDIs have limited magnetic field strength, consist of heavy-weight material, and can only be used with a single purpose, i.e., as chasing or docking satellite. Replacing the magnetic material in the FPDI by a trapped field (TF)-magnet would enable the interface to operate for both purposes, i.e., generating a (stronger) magnetic field and trapping it. We show the requirements for such a system and discuss the possible gains when using a TF-FPDI in satellites. To reduce the system weight, the use of superconducting foams as superconducting material is discussed in detail. Furthermore, the use of superconducting foams, the size of which can be easily upscaled, may also comprise the function of the damping material, so even more weight could be saved for the payload.

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Держатели документа:
Saarland Univ, Dept Expt Phys, D-66041 Saarbrucken, Germany.
Shibaura Inst Technol, Tokyo 1358548, Japan.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Tokyo Univ Sci, Dept Phys, Tokyo 1628601, Japan.
Univ Lorraine, GREEN, F-54000 Nancy, France.

Доп.точки доступа:
Koblischka, Michael R.; Koblischka-Veneva, Anjela; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Naik, S. Pavan Kumar; Nouailhetas, Quentin; Berger, Kevin; Douine, Bruno; ANRFrench National Research Agency (ANR); DFGGerman Research Foundation (DFG)European Commission [ANR-17-CE05-0030, DFG-ANR Ko2323-10]
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10.

Heat capacity and thermal expansion study of Ba0.9Bi0.067(Ti1-xZrx)O-3 ceramics / M. . Gorev [et al.] // J. Phys.: Condens. Matter. - 2007. - Vol. 19, Is. 34. - Ст. 346237, DOI 10.1088/0953-8984/19/34/346237. - Cited References: 15 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
BA(TI1-XZRX)O-3
STATE
Кл.слова (ненормированные):
Adiabatic calorimeters -- Temperature range -- Temperature regions -- Thermal expansion anomaly -- Barium -- Ceramic materials -- Dielectric properties -- Expansion -- Specific heat -- Zirconium -- Thermal expansion
Аннотация: For Ba0.9Bi0.067(Ti1-xZrx)O-3 (x = 0.04, 0.15) ceramics, the heat capacity C-p(T) and the thermal expansion alpha(T) were measured using an adiabatic calorimeter and an optical-mechanical dilatometer in the temperature range 100-420 K. Both compounds reveal diffuse heat capacity and thermal expansion anomalies: three anomalies in the temperature regions 150-250 K, 250-300 K (alpha(T) only) and 300-400 K at x = 0.04 and two anomalies in the regions 200 250 K and 250-350 K at x = 0.15. The results obtained are discussed together with the data on the dielectric properties.

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Держатели документа:
[Gorev, Michail
Bondarev, Vitaly
Flerov, Igor] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
[Maglione, Mario
Simon, Annie] Univ Bordeaux 1, CNRS, ICMCB, F-33608 Pessac, France
ИФ СО РАН
LVKirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
ICMCB-CNRS, Universite de Bordeaux i, 87 avenue ASchweitzer, 33608 Pessac, France

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Flerov, I. N.; Флёров, Игорь Николаевич; Maglione, M.; Simon, A.
}
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11.

Heat capacity and thermal expansion study of relaxor-ferroelectric Ba0.92Ca0.08Ti0.76Zr0.24O3 / M. . Gorev [et al.] // J. Phys.: Condens. Matter. - 2004. - Vol. 16, Is. 39. - P. 7143-7150, DOI 10.1088/0953-8984/16/39/045. - Cited References: 18 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
CERAMICS
BA(TI1-XZRX)O-3
PEROVSKITES
Кл.слова (ненормированные):
Calorimetry -- Dielectric properties -- Ferroelectric materials -- Perovskite -- Phase transitions -- Solid solutions -- Specific heat -- Thermal expansion -- Adiabatic calorimetry -- Frequency dispersion -- Polar domains -- Relaxor ferroelectrics -- Barium compounds
Аннотация: Heat capacity and thermal expansion of the Ba0.92Ca0.08Ti0.76Zr0.24O3 compound is measured using the methods of adiabatic calorimetry and optic-mechanical dilatometry in the temperature range 100-370 K. Three blurred anomalies on the C-p(T) and alpha(T) dependencies are observed in the temperature range 200-360 K. The results of the studies are discussed together with data on the structure and dielectric properties in the framework of spherical random bond-random field model.

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CNRS, CEMES, F-31055 Toulouse, France
ИФ СО РАН
L V kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Sciau, P.; Savariault, J. M.
}
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12.

Heat capacity study of relaxors BaTi0.65Zr0.35O3 and BaTi0.60Zr0.40O3 / M. . Gorev [et al.] // J. Phys.: Condens. Matter. - 2006. - Vol. 18, Is. 17. - P. 4407-4416, DOI 10.1088/0953-8984/18/17/026. - Cited References: 21 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
CERAMICS
BA(TI1-XZRX)O-3
BATIO3
Кл.слова (ненормированные):
Calorimetry -- Composition -- Data reduction -- Lead compounds -- Mathematical models -- Permittivity -- Specific heat -- Adiabatic calorimetry -- Burns temperature -- Diffuse anomalies -- Barium compounds
Аннотация: The heat capacity of two relaxors BaTi(1-x)ZrxO(3) (x = 0.35, 0.40) was measured using adiabatic calorimetry in the temperature range 100-360 K. The Cp(T) dependence of both compositions is characterized by the presence of two diffuse anomalies near the Burns temperature T-d and the temperature of the maximum in permittivity T-m in the temperature ranges 250-350 K and 120 200 K. The anomalous heat capacity near T-d was analysed taking into account the distribution of Zr concentration in nanoregions leading to the distribution of their transition temperatures into the polar phase. Excess heat capacity near Tm was discussed in the framework of the spherical random bond-random field model. The results are compared with the data obtained by the same procedures for PbMg1/3Nb2/3O3 studied experimentally earlier.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
CNRS, CEMES, F-31055 Toulouse, France
ИФ СО РАН
L V Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
CEMES-CNRS, 31055 Toulouse, France

Доп.точки доступа:
Gorev, M.; Bondarev, V.; Sciau, P.; Savariault, J. M.
}
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13.

Hysteretic behavior of the magnetoresistance and the critical current of bulk Y3/4Lu1/4Ba2CU3O7+CuOcomposites in a magnetic field / 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. 1307-1308, DOI 10.1016/j.physc.2007.03.346. - Cited References: 7 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
SUPERCONDUCTORS
Кл.слова (ненормированные):
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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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; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Popkov, S. I.; Попков, Сергей Иванович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович
}
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14.

Belyaev, B. A.
Impedance spectroscopy study of the electrical properties of cation-substituted barium hexaaluminate ceramics / B. A. Belyaev, N. A. Drokin, V. A. Poluboyarov // Phys. Solid State. - 2018. - Vol. 60, Is. 2. - P. 274-280, DOI 10.1134/S1063783418020063. - Cited References:18 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
DIELECTRIC-RELAXATION
LIQUID-CRYSTALS
SPECTRA
Аннотация: We report on the behavior of frequency and temperature dependences of the impedance of a measuring cell in the form of a parallel-plate capacitor filled with barium hexaaluminate ceramics with four aluminum cations replaced by iron (BaO · 2Fe2O3 · 4Al2O3). The measurements have been performed in the frequency range of 0.5–108 Hz at temperatures of 20-375°C. A technique for determining the electrical properties of the investigated ceramics is proposed, which is based on an equivalent electric circuit allowing the recorded impedance spectra to be approximated with sufficiently high accuracy. The established spectral features are indicative of the presence of two electric relaxation times different from each other by three orders of magnitude. This fact is explained by the difference between the charge transport processes in the bulk of crystallites and thin intercrystallite spacers, for which the charge activation energies have been determined.

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Публикация на русском языке Беляев, Борис Афанасьевич. Исследование электрофизических характеристик катион-замещенной керамики гексаалюмината бария методом импедансной спектроскопии [Текст] / Б. А. Беляев, Н. А. Дрокин, В. А. Полубояров // Физ. тверд. тела. - 2018. - Т. 60 Вып. 2. - С. 269–275

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC SB RAS, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Poluboyarov, V. A.; Беляев, Борис Афанасьевич
}
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15.

Investigations of residual stresses in barium titanate pressed powder and their effects to the properties of the ferroelectric phase transition / I. V. Zaytseva [et al.] // Second International Workshop "Modern Nanotechnologie" (IWMN-2016) : abstact book / Урал. Фед. ун-т им. Первого Президента России Б. Н. Ельцина. - 2016. - Ст. O-22. - P. 47. - References: 3

http://nanocenter.urfu.ru/sites/default/files/docs/IWMN-2016%20Abstract%20book.pdf,
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Доп.точки доступа:
Zaytseva, I. V.; Зайцева И. В.; Krylov, A. S.; Крылов, Александр Сергеевич; Pugachev, A. M.; Пугачев А. М.; Malinovsky, V. K.; Малиновский В. К.; "Modern Nanotechnologies", International Workshop(2 ; 2016 ; Aug. ; 27-29 ; Ekaterinburg); Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина
}
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16.

Zhandun, V. S.
Lattice dynamics, ferroelectric and antiferroeelctric instabilities, and the ferroelectric phase transition in disordered PbB(1/2)' B(1/2)'' O(3) (B ' = Ga, In, Lu; B '' = Nb, Ta) solid solutions / V. S. Zhandun, N. G. Zamkova, V. I. Zinenko // J. Exp. Theor. Phys. - 2008. - Vol. 106, Is. 6. - P. 1109-1117, DOI 10.1134/S1063776108060101. - Cited References: 29 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
STATISTICAL-MECHANICS
   PEROVSKITES
   CRYSTALS
   ORDER
   RELAXOR
   BATIO3
   PBTIO3
Кл.слова (ненормированные):
Crystal lattices -- Ferroelectricity -- Lattice vibrations -- Solids -- Ferroelectric (barium strontium titanate) -- Ferroelectric phase transitions -- Lattice (CO) -- Lattice dynamics -- Vibration spectrum -- Ferroelectric materials
Аннотация: The lattice vibration spectra, rf permittivity, and dynamic Born charges of disordered PbB(1/2)'B(1/2)'' O(3) (B' = Ga, In, Lu; B '' = Nb, Ta) solid solutions are calculated in terms of the generalized Gordon-Kim model. All the compounds are found to have soft modes related to the center (Gamma(15)) and boundary point R (R(15)) of the Brillouin zone; the frequencies of these modes are close. The ferroelectric phase transition temperatures and the spontaneous polarization in the ferroelectric phase are calculated for the solid solutions using a model Hamiltonian in the local mode approximation and the Monte Carlo method. These temperatures for the tantalum compounds are found to be higher than for the niobium compounds, and temperature t(s) increases with the atomic number of ion B'. A model where the antiferroelectric state is related to the condensation of modes Gamma(15) and R(15) is proposed. It is found that, for all compounds except for PbSc(1/2)Nb(1/2)O(3) and PbSc(1/2)Ta(1/2)O(3), the ferroelectric phase, which is only related to the condensation of mode R(15), and the antiferroelectric phase have similar energies. In PbIn(1/2)Ta(1/2)O(3), the antiferroelectric phase turns out to be energetically favorable.

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Держатели документа:
[Zhandun, V. S.
Zamkova, N. G.
Zinenko, V. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Zamkova, N. G.; Замкова, Наталья Геннадьевна; Zinenko, V. I.; Зиненко, Виктор Иванович; Жандун, Вячеслав Сергеевич
}
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17.

    Magnetic and transport properties of Gd(0.9)A(0.1)CoO(3-delta) (A = Ba, Sr) / N. V. Kazak [et al.] // J. Magn. Magn. Mater. - 2009. - Vol. 321, Is. 9. - P. 1266-1271, DOI 10.1016/j.jmmm.2008.11.087. - Cited Reference Count: 31. - Гранты: This study was supported by the Rosnauka (Project no. MK-4278.2008.2), Russian Foundation for Basic Research (Project no. 08-02-90708 mob_st) and "Strongly correlated electrons'' program of the Department of Physical Sciences of RAS. - Финансирующая организация: Rosnauka [MK-4278.2008.2]; Russian Foundation for Basic Research [08-02-90708 mob_st]; "Strongly correlated electrons'' program of the Department of Physical Sciences of RAS . - ISSN 0304-8853
Рубрики:
PEROVSKITE
   PR
   LA
   EU
   ND
   LN
   TRANSITION
   SPIN
   GD
   SM
Кл.слова (ненормированные):
Perovskite structure -- Doped cobaltite -- Magnetic susceptibility -- Metal-insulator transition -- Doped cobaltite -- Magnetic susceptibility -- Metal-insulator transition -- Perovskite structure -- Antiferromagnetism -- Barium -- Cobalt compounds -- Electric conductivity -- Ferromagnetic materials -- Ferromagnetism -- Gadolinium -- Magnetic susceptibility -- Metal insulator boundaries -- Oxide minerals -- Paramagnetic materials -- Perovskite -- Phase separation -- Semiconductor insulator boundaries -- Transport properties -- Antiferromagnetic -- Doped cobaltite -- Doped samples -- Electrical conductivity measurements -- Ferromagnetic transitions -- Insulator-metal transitions -- Magnetic and transport properties -- Magnetic behaviors -- Perovskite structure -- Temperature ranges -- Transport datum -- X- ray diffractions -- Metal insulator transition
Аннотация: The X-ray diffraction, magnetization and electrical conductivity measurements for Gd(0.9)A(0.1)CoO(3-delta) (A = Ba, Sr) have been made. The complicated magnetic behavior, including the paramagnetic-ferromagnetic-antiferromagnetic and paramagnetic-ferromagnetic transitions, was found for Ba- and Sr-doped samples. The gradual insulator-metal transitions were observed in a wide temperature range T = 600-800 K. The complex magnetic and transport data could be explained on the basis of the structural phase separation. (C) 2009 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Polytech Inst, Krasnoyarsk 660074, Russia
Univ Guadalajara, CUCEI, Dept Fis, Guadalajara 44430, Jalisco, Mexico
Siberian Fed Univ, Inst Nat & Humanitary Res, Krasnoyarsk 660041, Russia
AA Galkin Donetsk Phystech Natl Acad Sci Ukraine, UA-83114 Donetsk, Ukraine

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Balaev, A. D.; Балаев, Александр Дмитриевич; Ivanova, N.B.; Pashkevich, Yu. G.; Michel, C.R.; Bondarenko, G. V.; Бондаренко, Геннадий Васильевич
}
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18.

Magnetic field dependence of intergrain pinning potential in bulk granular composites YBCO plus CuO demonstrating large magneto-resistive effect / D. A. Balaev [et al.] // J. Supercond. Nov. Magn. - 2008. - Vol. 21, Is. 4. - P. 243-247, DOI 10.1007/s10948-008-0324-1. - Cited References: 22 . - ISSN 1557-1939

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   ACTIVATED PHASE-SLIP
   TRANSITION
   DISSIPATION
   MECHANISM
   SENSORS
   MODEL
Кл.слова (ненормированные):
bulk granular High-T(C) superconductor -- magneto-resistive effect -- Josephson junction network -- inter-grain pinning potential -- Bulk granular High-T C superconductor -- Inter-grain pinning potential -- Josephson junction network -- Magneto-resistive effect -- Bulk composites -- Bulk granular High-T subC/sub superconductor -- Granular composites -- Inter-grain pinning potential -- Josephson junction network -- Magnetic field dependences -- Magneto-resistive effect -- Pinning potential -- Resistive effects -- Resistive transitions -- Wide temperature range -- Y-Ba-Cu-O -- Atmospheric temperature -- Barium -- Copper -- Copper oxides -- Electric resistance -- Magnetic field measurement -- Magnetic fields -- Magnetoresistance -- Magnetos -- Yttrium barium copper oxides -- Magnetic field effects
Аннотация: The broadening of the resistive transition in magnetic field and isotherms of magnetoresistance of bulk composites Y-Ba-Cu-O + CuO have been studied. These composites exhibit large magneto-resistive effect in a wide temperature range below T (C) due to weakening of Josephson coupling in this system. The broadening of the resistive transition and magnetoresistance are explained well by the Ambegaokar-Halperin (AH) model for phase slip in Josephson junctions. The magnetic field dependence of pinning potential in the intergrain boundaries deduced from AH model found out to be similar to that of critical current of an array of Josephson junctions. The values of pinning energy point out that the large magneto-resistive effect observed in the composites results from flux flow-like processes at the intergrain boundaries.

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Держатели документа:
[Balaev, D. A.
Dubrovskiy, A. A.
Popkov, S. I.
Shaykhutdinov, K. A.
Petrov, M. I.] RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics of RAS, 660036, Krasnoyarsk, Russian Federation

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

Magnetoresistance hysteresis in granular HTSCs as a manifestation of the magnetic flux trapped by superconducting grains in YBCO+CuO composites / D. A. Balaev [et al.] // J. Exp. Theor. Phys. - 2007. - Vol. 105, Is. 6. - P. 1174-1183, DOI 10.1134/S1063776107120084. - Cited References: 53 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTOR
   CRITICAL-CURRENT-DENSITY
   CURRENT-VOLTAGE CHARACTERISTICS
   BA-CU-O
   TRANSPORT-PROPERTIES
   FIELD
   YBA2CU3O7-DELTA
   FLUCTUATIONS
   FINGERPRINT
   NETWORK
Кл.слова (ненормированные):
Critical currents -- Hysteresis -- Hysteresis loops -- Josephson junction devices -- Magnetic flux -- Magnetoresistance -- Yttrium barium copper oxides -- Granular superconductors -- Hysterestic dependence -- Negative magnetoresistance -- Transport current -- Composite materials
Аннотация: Hysterestic behavior of the magnetoresistance of granular HTSCs and its interaction with the magnetic hysteresis are studied by measuring magnetoresistance R(H) and critical current I-c(H) of composites formed by HTSC Y0.75Lu0.25Ba2CU3O7 and CuO. A network of Josephson junctions is formed in such composites, in which the nonsuperconducting component plays the role of barriers between HTSC grains. Hysteretic dependences R(H) of magnetoresistance are studied in a wide range of transport current density j and are analyzed in the framework of the two-level model of a granular superconductor, in which dissipation takes place in the Josephson medium and the magnetic flux can be pinned both in grains and in the Josephson medium. The interrelation between the hysteresis of critical current I-c(H) and the evolution of the hysterestic dependence R(H) of the magnetoresistance upon transport current variation is demonstrated experimentally. The effect of the magnetic past history on the hysteretic behavior of R(H) and the emergence of a segment with a negative magnetoresistance are analyzed. It is shown for the first time that the R(H) dependences are characterized by a parameter that is independent of the transport current, viz., the width of the R(H) hysteresis loop.

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

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; 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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20.

Magnetoresistive effect in bulk composites 1-2-3 YBCO+CuO and 1-2-3 YBCO+BaPb(1-x)SnxO(3) and their application as magnetic field sensors at 77 K / D. A. Balaev [et al.] // Supercond. Sci. Technol. - 2004. - Vol. 17, Is. 1. - P. 175-181, DOI 10.1088/0953-2048/17/1/031. - Cited References: 27 . - ISSN 0953-2048

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
PHASE-SLIP
   SUPERCONDUCTOR
   TEMPERATURE
   YBA2CU3O7-DELTA
   TRANSITION
Кл.слова (ненормированные):
Ceramic materials -- Composite materials -- Critical current density (superconductivity) -- High temperature operations -- High temperature superconductors -- Lead compounds -- Magnetoresistance -- Sensors -- Yttrium barium copper oxides -- High temperature superconductor ceramics -- Magnetic field sensors -- Magnetoresistive effect -- Transport current density -- Oxide superconductors
Аннотация: We have studied the magnetoresistive effect in bulk 1-2-3 YBCO + CuO and 1-2-3 YBCO + BaPb1-xSnxO3 composites prepared using the fast backing technique. We have found that the composites exhibit large magnetoresistance in low magnetic fields (< 100 Oe) for a broad temperature range. We have studied the experimental dependences of resistivity versus magnetic field at various transport current densities. The high-T-C superconductor (HTSC) based composites exhibit a much higher sensitivity to weak magnetic fields at liquid nitrogen temperature, compared to that for pure HTSC ceramics. This effect is attractive for practical applications and the composite materials can be used as active elements in magnetic field sensor devices.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Inst of Physics, 660036, Krasnoyarsk, Russian Federation
RSSAU, Krasnoyarsk 660014, Russian Federation

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