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A capacitive dilatometer for measuring the magnetostriction, piezoelectric effect, and lInear thermal-expansion coefficient / A. L. Freidman [et al.] // Tech. Phys. Lett. - 2018. - Vol. 44, Is. 2. - P. 123-125, DOI 10.1134/S1063785018020074. - Cited References:11. - This study was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, the Krasnoyarsk Krai Foundation for Support of Scientific and R& D Activities (project no. 16-48-243040) and the Russian Foundation for Basic Research (project no. 16-3800245). . - ISSN 1063-7850. - ISSN 1090-6533

РУБ Physics, Applied

Аннотация: We describe a capacitive dilatometer for measuring the magnetostriction, piezoelectric effect, and linear thermal-expansion coefficient in the temperature range from 1.85 to 350 K in external magnetic fields of up to 90 kOe under a voltage of 1 kV, which operates on the basis of a Quantum Design PPMS commercial facility for studying the properties of solids.

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Публикация на русском языке Емкостный дилатометр для измерения магнитострикции, пьезоэлектрического эффекта и коэффициента линейного температурного расширения [Текст] / А. Л. Фрейдман [и др.] // Письма в Журн. техн. физ. - 2018. - Т. 44 Вып. 3. - С. 79–86

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Fed Res Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Freydman, A. L.; Фрейдман, Александр Леонидович; Popkov, S. I.; Попков, Сергей Иванович; Semenov, S. V.; Семенов, Сергей Васильевич; Turchin, P. P.; Russian Foundation for Basic Research; Government of Krasnoyarsk krai; Krasnoyarsk Krai Foundation for Support of Scientific and R D Activities [16-48-243040]; Russian Foundation for Basic Research [16-3800245]
}
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Anisotropy and crystallite misalignment in textured superconductors / D. M. Gokhfeld, S. V. Semenov, M. I. Petrov [et al.] // J. Supercond. Nov. Magn. - 2023. - Vol. 36, Is. 1. - P. 59-65, DOI 10.1007/s10948-022-06454-8. - Cited References: 21. - This work was supported by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project “Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements” No. 20–42–240008 . - ISSN 1557-1939. - ISSN 1557-1947
Кл.слова (ненормированные):
Critical current -- Anizotropy -- BSCCO -- Texture -- Distribution function -- Magnetization -- Hysteresis loop
Аннотация: A misalignment of anisotropic crystallites causes small values of anisotropy and decreases the critical current density of textured polycrystalline superconductors. To relate the crystallite misalignment and out-plane anisotropy, the magnetic properties of the textured Bi2223 polycrystalline superconductor were investigated. A distribution of orientation angles of crystallites was determined using different data: scanning electron microscopy images and hysteresis magnetization loops when an external magnetic field was applied at different angles with respect to the texturing plane of the sample. It was demonstrated that the standard deviation of the distribution and the magnetic disorder angle of crystallites in textured samples can be determined from the magnetization data in perpendicular directions. These data may be either the irreversible magnetization measured for two different orientations of the sample or the simultaneously measured magnetization projections parallel and perpendicular to the magnetic field.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Semenov, S. V.; Семенов, Сергей Васильевич; Petrov, M. I.; Петров, Михаил Иванович; Nemtsev, I. V.; Немцев, Иван Васильевич; Balaev, D. A.; Балаев, Дмитрий Александрович
}
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Anisotropy of the magnetoresistive properties of granular high-temperature superconductors resulting from magnetic flux compression in the intergrain medium / S. V. Semenov [et al.] // Phys. Solid State. - 2017. - Vol. 59, Is. 7. - P. 1291-1297, DOI 10.1134/S1063783417070241. - Cited References: 26 . - ISSN 1063-7834
Аннотация: To elucidate the origin of the well-known anisotropy of the magnetoresistive properties of granular high-temperature superconductors (HTSs), which is related to the mutual orientation of magnetic field H and transport current j, we investigate the hysteretic dependences of magnetoresistance R(H) of the yttrium HTS sample at the perpendicular (H ⊥ j) and parallel (H || j) configurations. The hysteretic R(H) dependences are analyzed using the concept of the effective field in the intergrain boundaries through which superconducting current carriers tunnel. The effective degree of magnetic flux compression in the intergrain medium at the perpendicular configuration was found to be twice as much as at the parallel one. This approach explains well the anisotropy of the magnetoresistive properties of granular HTSs, which was previously reported by many authors, and the temperature dependences of the resistance in the resistive transition region.

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Публикация на русском языке Анизотропия магниторезистивных свойств гранулярных высокотемпературных сверхпроводников как результат сжатия магнитного потока в межгранульной среде [Текст] / С. В. Семенов [и др.] // Физ. тверд. тела : Наука, 2017. - Т. 59 Вып. 7. - С. 1267–1273

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Semenov, S. V.; Семенов, Сергей Васильевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Pochekutov, M. A.; Почекутов, М. А.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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Compression of a magnetic flux in the intergrain medium of a YBa2Cu3O7 granular superconductor from magnetic and magnetoresistive measurements / D. A. Balaev [et al.] // J. Appl. Phys. - 2011. - Vol. 110, Is. 9. - Ст. 93918, DOI 10.1063/1.3657775. - Cited References: 21. - We thank V. V. Val'kov and A. D. Balaev for useful discussions of the results and I. Nemtsev for microscopic study of the samples. The study was supported by the Program of the Russian Academy of Sciences No. 5, Project No. 7. . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   CRITICAL-CURRENT-DENSITY
   CRITICAL-STATE MODEL
   CRITICAL CURRENTS
   JOSEPHSON MEDIUM
   FIELD
   TRANSITION
Кл.слова (ненормированные):
Effective field -- External fields -- Field dependence -- Field induced -- Granular superconductors -- Inter-grain -- Josephson -- Magnetoresistive -- Space between -- Superconducting grains -- Transport currents -- Electric resistance -- Magnetic flux -- Magnetic moments -- Superconductivity -- Superconducting materials
Аннотация: A method to determine a value of the effective field in the intergrain medium of a granular superconductor is proposed. The space between superconducting grains is considered to be a Josephson medium where passage of the transport current causes dissipation and the effective field is superposition of external field H and the field induced by magnetic moments of superconducting grains. The method proposed is based on the comparison of hysteresis field dependences of magnetoresistance and magnetization and their relaxation at H=const. By the example of granular YBa2Cu3O7, it is shown that, in the region of weak fields, the effective field in the intergrain medium exceeds by far the external field, i.e., compression of a magnetic flux occurs. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3657775]

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Держатели документа:
[Balaev, D. A.
Popkov, S. I.
Semenov, S. V.
Shaykhutdinov, K. A.
Shabanov, A. V.
Petrov, M. I.] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Balaev, D. A.
Sabitova, E. I.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, 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; Sabitova, E. I.; Semenov, S. V.; Семенов, Сергей Васильевич; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Shabanov, A. V.; Шабанов, Александр Васильевич; Petrov, M. I.; Петров, Михаил Иванович
}
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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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Current-voltage characteristics of polycrystalline (La0.5Eu0.5)(0.7)Pb0.3MnO3 at low temperatures / K. A. Shaikhutdinov [et al.] // Phys. Solid State. - 2011. - Vol. 53, Is. 12. - P. 2455-2458, DOI 10.1134/S1063783411120213. - Cited References: 16. - This study was supported in part by the Siberian Branch of the Russian Academy of Sciences (within the framework of the Lavrent'ev Competition of Young Scientists' Projects (project no. 12). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MANGANITES
Аннотация: The current-voltage characteristics of the polycrystalline substituted lanthanum manganite (La0.5Eu0.5)(0.7)Pb0.3MnO3 have been measured at temperatures close to the metal-insulator transition temperature and at low temperatures. In both cases, the current-voltage characteristics exhibit nonlinear properties that are strongly dependent on the strength of an applied magnetic field. The mechanisms responsible for the nonlinear properties at these temperatures are found to be different: near the metal-insulator transition, the current-voltage characteristics are determined by the phase layering inside granules, while at low temperatures, they are determined by tunneling of carriers through insulating interlayers of the granules.

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Держатели документа:
[Shaikhutdinov, K. A.
Balaev, D. A.
Popkov, S. I.
Semenov, S. V.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Semenov, S. V.; Семенов, Сергей Васильевич; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович
}
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General regularities of magnetoresistive effects in the polycrystalline yttrium and bismuth high-temperature superconductor systems / D. A. Balaev [et al.] // Phys. Solid State. - 2011. - Vol. 53, Is. 5. - P. 922-932, DOI 10.1134/S1063783411050052. - Cited References: 52. - This study was supported by the Russian Academy of Sciences within the program no. 5 (project no. 7). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
HIGH MAGNETIC-FIELDS
   PHASE-SLIP
   RESISTIVE TRANSITION
   CU-O
   TRANSPORT-PROPERTIES
   JOSEPHSON MEDIUM
   MIXED-STATE
   FLUX-CREEP
   T-C
   DISSIPATION
Аннотация: The influence of thermomagnetic prehistory on the behavior of a resistive transition R(T) in external magnetic fields of polycrystalline YBa(2)Cu(3)O(7) and Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O (x) high-temperature supercon-ductors and the Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O (x) + Ag texture has been investigated. It has been found that, for YBa(2)Cu(3)O(7), the thermomagnetic prehistory exerts a substantial influence on the dissipation in the subsystem of grain boundaries in magnetic fields up to similar to 10(3) Oe, and this effect becomes insignificant in fields higher than similar to 10(4) Oe. This behavior has been explained by the influence of magnetic moments of high-temperature superconductor grains on the effective magnetic field in the intergranular medium. For bismuth high-temperature superconductors, no influence of thermomagnetic prehistory on the resistive transition has been observed; however, this effect manifests itself in current-voltage characteristics at high transport current densities. There is also a radical difference in the behavior of isotherms of the magnetoresistance R(H) for the yttrium and bismuth systems. For YBa(2)Cu(3)O(7), there is a clear separation between the dissipation regimes in the intergranular medium and in grains, which manifests itself even at low transport current densities as a change of sign in the curvature of the dependence R(H). For a texture based on the bismuth high-temperature superconductor, this feature has been observed only at high current densities (comparable to the critical current density at H = 0). This difference in the behavior of magnetoresistive properties of the classical high-temperature superconductor systems under investigation has been explained by relatively low irreversibility fields of the bismuth high-temperature superconductors. In these materials, simultaneous processes of dissipation can occur in an external magnetic field both in the subsystem of grain boundaries between crystallites and in the crystallites themselves.

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Держатели документа:
[Balaev, D. A.
Bykov, A. A.
Semenov, S. V.
Popkov, S. I.
Dubrovskii, A. A.
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 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Bykov, A. A.; Быков, Алексей Анатольевич; Semenov, S. V.; Семенов, Сергей Васильевич; Popkov, S. I.; Попков, Сергей Иванович; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович
}
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Hysteresis of magnetoresistance in granular La0.7Ca0.3MnO3 at low temperatures / K. A. Shaykhutdinov [et al.] // Phys. Solid State. - 2009. - Vol. 51, Is. 4. - P. 778-780, DOI 10.1134/S1063783409040234. - Cited References: 4. - This work was supported in part by the Russian Foundation for Basic Research (project no. 08-0200259a) and a contest among young scientists of Siberian Federal University (project no. 6). . - ISSN 1063-7834

РУБ Physics, Condensed Matter

Аннотация: The magnetoresistance of granular La0.7Ca0.3MnO3 is studied experimentally over wide ranges of temperatures and magnetic fields. The emphasis is on anomalously large hysteresis of magnetoresistance at low temperatures (T = 4.2 K). The observed rho(H) dependence can be qualitatively explained by spin-dependent tunneling of electrons through the dielectric boundaries of conducting granules characterized by a wide spread in the magnetic-moment magnitudes.

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Держатели документа:
[Shaykhutdinov, K. A.
Semenov, S. V.
Balaev, D. A.
Petrov, M. I.
Volkov, N. V.] Siberian Fed Univ, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Semenov, S. V.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodny pr. 79, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Petrov, M. I.; Петров, Михаил Иванович; Volkov, N. V.; Волков, Никита Валентинович; Russian Foundation for Basic Research [08-0200259a]; Siberian Federal University [6]
}
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Low-temperature resistance and magnetoresistance hysteresis in polycrystalline (La0.5Eu0.5)(0.7)Pb0.3MnO3 / K. A. Shaykhutdinov [et al.] // J. Appl. Phys. - 2011. - Vol. 109, Is. 5. - Ст. 53711, DOI 10.1063/1.3559303. - Cited References: 20. - This study was partially supported by the Russian Foundation for Basic Research, Project No. 08-02-00259a and the Lavrentyev Competition of the Young Scientists' Projects of the Siberian Branch of the Russian Academy of Sciences, Project No. 12. . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
RESISTIVITY MINIMUM
MANGANITES
FILMS
Кл.слова (ненормированные):
Antiferromagnets -- Electrical resistances -- Ferromagnets -- Field dependence -- Inter-grain -- Lanthanum manganites -- Low temperatures -- Low-temperature resistance -- Polycrystalline -- Temperature dependence -- Tunnel contacts -- Antiferromagnetic materials -- Europium -- Ferromagnetic materials -- Ferromagnetism -- Hysteresis -- Lead -- Magnetic field effects -- Magnetoelectronics -- Magnetoresistance -- Magnets -- Manganese oxide -- Paramagnetism -- Superconducting materials -- Electric resistance
Аннотация: The behavior of temperature dependences of electrical resistance and magnetoresistance of polycrystalline substituted lanthanum manganite (La0.5Eu0.5)(0.7)Pb0.3MnO3 at low temperatures was thoroughly studied. A broad hysteresis was found in the field dependences of electrical resistance in the low-temperature region. Above 40 K, no hysteresis feature was observed. The temperature T = 40 K corresponds to the temperature of minimum electrical resistance and the temperature T-N to the antiferromagnet-paramagnet phase transition of the material of the intergrain boundaries. In this work we propose a model which explains the observed features of the rho(T) and rho(H) curves at temperatures below T-N by the formation of a network of ferromagnet-antiferromagnet-ferromagnet tunnel contacts. (C) 2011 American Institute of Physics. [doi:10.1063/1.3559303]

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Держатели документа:
[Shaykhutdinov, K. A.
Popkov, S. I.
Semenov, S. V.
Balaev, D. A.
Dubrovskiy, A. A.
Sablina, K. A.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shaykhutdinov, K. A.
Balaev, D. A.
Dubrovskiy, A. A.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Semenov, S. V.; Семенов, Сергей Васильевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sablina, K. A.; Саблина, Клара Александровна; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович
}
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10.

Magnetoresistance hysteresis of bulk textured Bi1.8Pb0.3Sr1.9Ca2Cu3Ox + Ag ceramics and its anisotropy / D. A. Balaev [et al.] // Physica C. - 2010. - Vol. 470, Is. 1. - P. 61-67, DOI 10.1016/j.physc.2009.10.007. - Cited References: 24. - Authors thanks to I.L. Belozerova for help in preparation of textured ceramics. This work was supported by program N5 of RAS, project N7, and in part in frames of young scientist projects of Siberian Federal University, project N6. . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
CRITICAL-CURRENT ANISOTROPY
   HIGH-TEMPERATURE SUPERCONDUCTOR
   CRITICAL-CURRENT DENSITY
   MAGNETIC HYSTERESIS
   TAPES
   FLUX
   YBA2CU3O7-DELTA
   FIELD
Кл.слова (ненормированные):
Magnetoresistance -- Anisotropy -- Scaling -- Magnetization -- Bi2223 -- BSCCO -- Anisotropy -- Bi2223 -- BSCCO -- Magnetization -- Magnetoresistance -- Scaling -- Bi-2223 -- BSCCO -- External fields -- Granular superconductors -- Magnetic induction -- Parameters characterizing -- Anisotropy -- Calcium -- Ceramic materials -- Crystallites -- Electric resistance -- Hysteresis -- Lead -- Magnetic moments -- Magnetoelectronics -- Magnetoresistance -- Nanocrystalline alloys -- Silver -- Superconducting materials -- Superconductivity -- Magnetic field effects
Аннотация: Magnetoresistance of bulk textured Bi1.8Pb0.3Sr1.9Ca2Cu3Ox + Ag ceramics has been studied in the magnetic fields applied parallel and perpendicular to a-b planes of Bi2223 crystallites. Besides well known anisotropy of magnetoresistance of textured superconductors (R-H parallel to c > RH parallel to a-b), anisotropic hysteresis of R(H) dependences was investigated. Parameters characterizing hysteretic R(H) curves differ for the cases H parallel to c and H parallel to a-b. This behavior is explained within the model of a granular superconductor where the total magnetic induction in the intercrystallite boundaries is superposition of the external field and the magnetic field induced by dipole magnetic moments of neighbor crystallites. (C) 2009 Elsevier B.V. All rights reserved.

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Держатели документа:
[Gokhfeld, D. M.] RAS, SD, LV Kirensky Phys Inst, High Magnet Fields Lab, Krasnoyarsk 660036, Russia
[Balaev, D. A.
Semenov, S. V.
Shaykhutdinov, 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; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Petrov, M. I.; Петров, Михаил Иванович
}
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11.

Magnetoresistance of substituted lanthanum manganites La0.7Ca0.3MnO3 upon nonequilibrium overheating of carriers / K. A. Shaykhutdinov [et al.] // J. Appl. Phys. - 2011. - Vol. 109, Is. 8. - Ст. 83711, DOI 10.1063/1.3573666. - Cited References: 15. - This study was partially supported by the Russian Foundation for Basic Research, project no. 08-02-00259a, and the Lavrent'ev's Competition of Young Scientists of the Siberian Branch of the RAS, project no. 12. . - ISSN 0021-8979

РУБ Physics, Applied

Кл.слова (ненормированные):
Field dependence -- Lanthanum manganites -- Low thermal conductivity -- Manganite materials -- Negative differential resistivity -- Non equilibrium -- Non-Linearity -- Nonequilibrium heating -- Polycrystalline -- Positive magnetoresistance -- Transport currents -- Electric resistance -- Electron gas -- Heating -- Lanthanum -- Lanthanum alloys -- Magnetic fields -- Magnetoelectronics -- Magnetoresistance -- Manganese oxide -- Manganites -- Thermal conductivity -- Current voltage characteristics
Аннотация: Current-voltage characteristics of the polycrystalline substituted lanthanum manganite La0.7Ca0.3MnO3 were experimentally studied at T - 77.4 K in magnetic fields up to 13 kOe. In these characteristics, a portion of negative differential resistivity was observed above a certain threshold value of critical current density j caused, in our opinion, by nonequilibrium heating of the electron gas due to low thermal conductivity of the manganite material. Because of the nonlinearity of the current-voltage characteristics, the field dependences of resistivity rho( H) appear extremely sensitive to the value of a transport current. In this case, the rho( H) dependences reveal both ordinary negative and positive magnetoresistance. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3573666]

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Держатели документа:
[Shaykhutdinov, K. A.
Semenov, S. V.
Popkov, S. I.
Balaev, D. A.
Bykov, A. A.
Dubrovskiy, A. A.
Petrov, M. I.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Dubrovskiy, A. A.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Popkov, S. I.; Попков, Сергей Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Bykov, A. A.; Быков, Алексей Анатольевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Petrov, M. I.; Петров, Михаил Иванович; Volkov, N. V.; Волков, Никита Валентинович
}
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12.

Non-linear current-voltage characteristics of (La0.5Eu0.5)(0.7)Pb0.3MnO3 single crystals: Possible manifestation of the internal heating of charge carriers / K. A. Shaykhutdinov [et al.] // Physica B. - 2010. - Vol. 405, Is. 24. - P. 4961-4965, DOI 10.1016/j.physb.2010.09.043. - Cited References: 19. - The authors are grateful to A.N. Lavrov for useful discussions on the results. This study was partially supported by the Russian Foundation for Basic Research, Project no. 08-02-00259a and the Lavrent'ev Young Scientists' Competition of the Siberian Branch of the Russian Academy of Sciences. Project no. 12. . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
INSULATOR-METAL TRANSITION
PR0.7CA0.3MNO3
MANGANITES
Кл.слова (ненормированные):
Manganites -- Negative differential resistance -- CVC -- CVC -- Manganites -- Negative differential resistance -- Applied electric field -- Charge ordering -- Current switching -- CVC -- Dielectric regions -- Experimental data -- Internal heating -- Lanthanum manganites -- Metal-dielectric transition -- Negative differential resistances -- Non equilibrium -- Non-linear -- Sample heating -- Temperature evolution -- Transport currents -- Electric fields -- Electron gas -- Europium -- Heating -- Lanthanum -- Lead -- Manganites -- Negative resistance -- Phase separation -- Single crystals -- Thermal conductivity -- Manganese oxide
Аннотация: Temperature evolution of the current-voltage characteristics (CVCs) of a single-crystal lanthanum manganite (La0.5Eu0.5)(0.7)Pb0.3MnO3 is investigated in a wide (up to 1 A) range of instrumental currents. Effects of a transport current and an applied electric field on the resistance of the material are studied in view of possible implementation of the charge ordering break in dielectric regions occurring due to phase separation in manganites. A negative differential resistance portion observed in the CVCs suggests the presence of a current switching effect. Below the temperature of the metal-dielectric transition in (La0.5Eu0.5)(0.7)Pb0.3MnO3, the hysteresis is observed in the CVC. The detailed analysis of the internal sample heating on the basis of experimental data on thermal conductivity showed, however, that these CVC features can be explained within the concept of non-equilibrium heating of electron gas. (C) 2010 Elsevier B.V. All rights reserved.

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Держатели документа:
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Semenov, S. V.
Bykov, A. A.
Dubrovskiy, A. A.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Dubrovskiy, A. A.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Bykov, A. A.; Быков, Алексей Анатольевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович
}
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13.

Гос. рег. прогр. для ЭВМ 2022663677 Российская Федерация

Q 1.0 / А. Л. Фрейдман, С. В. Семенов. - № 2022611993 ; Заявл. 14.07.2022 ; Опубл. 19.07.2022 // Программы для ЭВМ. Базы данных. Топологии интегральных микросхем : офиц. бюл. Фед. службы по интеллектуал. собственности (Роспатент). - 2022. - № 7
Аннотация: Программа предназначена для сбора данных с измерительных приборов, управления процессами развертки электрического и магнитного полей и температуры в ходе проведения экспериментальных работ, связанных с измерением петель сегнетоэлектрического гистерезиса. В программе реализованы графические и табличные средства отображения информации, предусмотрены режимы предварительной поляризации образца электрическим полем. ОС: Windows.

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

Доп.точки доступа:
Фрейдман, Александр Леонидович; Freydman, A. L.; Семенов, Сергей Васильевич; Semenov, S. V.; Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук"; Федеральная служба по интеллектуальной собственности (Роспатент); Федеральный институт промышленной собственности
}
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14.

Relaxation of low-temperature magnetoresistance and magnetization of polycrystalline (La0.5Eu0.5)(0.7)Pb0.3MnO3 / K. A. Shaykhutdinov [et al.] // J. Phys. D. - 2011. - Vol. 44, Is. 25. - Ст. 255001, DOI 10.1088/0022-3727/44/25/255001. - Cited References: 34. - This work was partially supported by the Lavrentyev Competition of the Young Scientist's Projects of the Siberian Branch of the Russian Academy of Sciences, Project No 12. The authors are grateful to A D Balaev and V M Sosnin for useful discussions on the results. . - ISSN 0022-3727

РУБ Physics, Applied
Рубрики:
INSULATOR-METAL TRANSITION
   GRANULAR FILMS
   NANOPARTICLES
   PR0.7CA0.3MNO3
   PERCOLATION
   MANGANITES
Кл.слова (ненормированные):
Antiferromagnetic boundaries -- Characteristic value -- Ferromagnetic domains -- Ferromagnetic metal -- Lanthanum manganites -- Logarithmic law -- Low temperatures -- Magneto-resistive effect -- Polycrystalline -- Relative orientation -- Relaxation of magnetization -- Temperature fluctuation -- Time evolutions -- Time interval -- Tunnel magnetoresistance -- Antiferromagnetism -- Electric resistance -- Europium -- Ferromagnetic materials -- Ferromagnetism -- Grain boundaries -- Grain size and shape -- Lanthanum compounds -- Lead -- Magnetic domains -- Magnetic moments -- Magnetoelectronics -- Magnetoresistance -- Manganese oxide -- Magnetization
Аннотация: Hysteresis and relaxation of magnetoresistance and magnetization of substituted (La0.5Eu0.5)(0.7)Pb0.3MnO3 lanthanum manganite in a low-temperature region (< 40 K) are investigated. It is shown that at these temperature features of the magnetoresistive effect are determined mainly by spin-dependent tunnelling of carriers via insulating grain boundaries. As was demonstrated previously, the grain boundaries may be antiferromagnetically ordered. Therefore, relaxation of magnetization and resistance is determined by the processes of relative orientation of the magnetic moments of ferromagnetic domains neighbouring the antiferromagnetic boundary of ferromagnetic domains under the action of temperature fluctuations. It is shown that relaxation follows the logarithmic law within the time interval t similar to 10(2)-3x10(3) s. A comparison between time evolutions of the magnetic moment and resistance shows that magnetoresistance and magnetization are related as delta R = delta M-n, where n = 2.5. The obtained value n is close to the characteristic value n = 2 for tunnel magnetoresistance of granular ferromagnetic metal/insulator systems.

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Держатели документа:
[Shaykhutdinov, K. A.
Balaev, D. A.
Semenov, S. V.
Popkov, S. I.
Dubrovskiy, A. A.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Popkov, S. I.; Попков, Сергей Иванович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович
}
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15.

Semenov, S. V.
Temperature behavior of the magnetoresistance hysteresis in a granular high-temperature superconductor: Magnetic flux compression in the intergrain medium / S. V. Semenov, D. A. Balaev // Physica C. - 2018. - Vol. 550. - P. 19-26, DOI 10.1016/j.physc.2018.04.005. - Cited References: 56. - The work was supported by the Russian Science Foundation (Grant No. 17-72-10050 ). . - ISSN 0921-4534
Кл.слова (ненормированные):
Barium compounds -- Copper compounds -- Grain boundaries -- Hysteresis -- Magnetic flux -- Magnetic moments -- Magnetization -- Magnetoresistance -- Yttrium barium copper oxides
Аннотация: Granular high-temperature superconductors (HTSs) are characterized by the hysteretic behavior of magnetoresistance. This phenomenon is attributed to the effective field in the intergrain medium of a granular HTS. At the grain boundaries, which are, in fact, weak Josephson couplings, the dissipation is observed. The effective field in the intergrain medium is a superposition of the external field and the field induced by magnetic moments of HTS grains. Meanwhile, analysis of the field width of the R(H) magnetoresistance hysteresis ΔH = Hdec − Hinc at Hdec = const, where Hinc and Hdec are increasing and decreasing branches of the R(H) hysteretic dependence, shows that the effective field in the intergrain medium exceeds by far both the external field and the field induced by magnetic moments of HTS grains. This situation suggests the magnetic flux compression in the intergrain medium because of the small length of grain boundaries, which amounts to ∼1 nm, i.e., is comparable with the coherence length and corresponds to Josephson tunneling in HTS materials. In this work, using the previously developed approach, we examine experimental data on the magnetoresistance and magnetization hysteresis in the granular YBa2Cu3O7 HTS compound in the range from 77 K to the critical temperature. According to the results obtained, the degree of magnetic flux compression determined by the parameter α in the expression for the effective field Beff(H) = H − 4π M(H) α in the intergrain medium remains constant over the investigated temperature range. All the features of the observed evolution of the R(H) hysteretic dependences are explained well within the proposed approach when the expression for Beff(H) contains the experimental M(H) magnetization data and the parameter α of about 20–25. The latter is indicative of the dominant effect of magnetic flux compression in the intergrain medium on the transport properties of granular HTS materials.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Семенов, Сергей Васильевич
}
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16.

The magnetic-field-driven effect of microwave detection in a manganite granular system / N. V. Volkov [et al.] // J. Phys. D. - 2008. - Vol. 41, Is. 1. - Ст. 15004, DOI 10.1088/0022-3727/41/1/015004. - Cited References: 24 . - ISSN 0022-3727

РУБ Physics, Applied
Рубрики:
IDENTICAL METALS
   TUNNEL-JUNCTIONS
   MAGNETORESISTANCE
   RECTIFICATION
   SPINTRONICS
   TEMPERATURE
   PEROVSKITES
Кл.слова (ненормированные):
Bias currents -- Curie temperature -- Electric power generation -- Granular materials -- Magnetic field effects -- Microwave irradiation -- Voltage measurement -- Direct current voltage -- Magnetic tunnel junctions -- Metal insulator metal junctions -- Nonmagnetic metals -- Manganites
Аннотация: We demonstrate the microwave detection effect in a granular La0.7Ca0.3MnO3 sample. Dc voltage generated by the sample in response to microwave irradiation below the Curie temperature is found to be dependent on the applied magnetic field. The magnetic field dependence of the dc voltage has a broad peak resembling an absorption line. The detection effect depends substantially on the magnetic history of the sample; however, identical measurement conditions provide reproducibility of the experimental results. The detected dc voltage increases linearly with microwave power and strongly depends on a bias current through the sample. According to the results of systematic measurements, there exist two contributions to a value of the detected output signal. The first is magneto-independent; it can be explained in the framework of a mechanism used traditionally for description of the rectification effect in metal-insulator-metal junctions with nonmagnetic metals. The other is magneto-dependent; it originates from the interplay between the spin-dependent current through magnetic tunnel junctions and spin dynamics of the grains, which form these junctions in the sample.

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Держатели документа:
[Volkov, N. V.
Eremin, E. V.
Shaykhutdinov, K. A.
Tsikalov, V. S.
Petrov, M. I.
Balaev, D. A.
Semenov, S. V.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, 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

Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Eremin, E. V.; Еремин, Евгений Владимирович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Tsikalov, V. S.; Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич
}
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17.

The manifestation of surface and size effects in the magnetic properties of ε-Fe2O3 nanoparticles. (Brief overview) / D. A. Balaev, A. A. Dubrovskii, Yu. V. Knyazev [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 6. - P. 938-946, DOI 10.21883/PSS.2023.06.56105.12H. - Cited References: 66 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
iron oxide ε-Fe2O3 -- nanoparticles -- size effect -- surface magnetic anisotropy
Аннотация: Polymorphic modification of iron oxide, known as ε-Fe2O3, exists only in the form of nanoparticles with characteristic sizes up to several tens of nanometers. Particles of these sizes exhibit a large coercive force, about 20 kOe at room temperature. In the temperature range of 80–150 K, a magnetic transition occurs in ε-Fe2O3, accompanied by a sharp decrease in the coercive force. At the same time, there are significant differences in the magnetic behavior of "large" (~20 nm) particles and ultra-small particles (up to 6 nm). A number of experimental facts indicate the manifestation of size effects that lead to a change in the magnetic structure in particles of these sizes. In addition, a surface effect is also manifested for such particles - a significant contribution to the magnetic behavior is governed by surface magnetic anisotropy. In this paper, a brief review of the manifestation of these size and surface effects in the magnetic properties of ε-Fe2O3 nanoparticles is carried out.

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Публикация на русском языке Проявление поверхностных и размерных эффектов в магнитных свойствах наночастиц ε-Fe2O3. (Краткий обзор) [Текст] / Д. А. Балаев, А. А. Дубровский, Ю. В. Князев [и др.]. - 10 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 6. - С. 979-988

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Институт катализа им. Г.К. Борескова СО РАН, Новосибирск, Россия

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Semenov, S. V.; Семенов, Сергей Васильевич; Kirillov, V. L.; Martianov, O. N.; Nanophysics and Nanoelectronics, International Symposium(27 ; 13-16 March 2023 ; Nizhny Novgorod, Russia)
}
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18.

Анизотропия гистерезиса магнитосопротивления текстуры на основе висмутового ВТСП / Д. А. Балаев, С. В. Семенов [и др.] // Упорядочение в минералах и сплавах (OMA-12) : Труды 12-го международного симпозиума. - Ростов-на-Дону, 2009. - Т. 1. - С. 87-90

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

Доп.точки доступа:
Балаев, Дмитрий Александрович; Balaev, D. A.; Семенов, Сергей Васильевич; Semenov, S. V.; Попков, Сергей Иванович; Popkov, S. I.; Быков, Алексей Анатольевич; Bykov, A. A.; Шайхутдинов, Кирилл Александрович; Shaikhutdinov, K. A.; Гохфельд, Денис Михайлович; Gokhfeld, D. M.; Петров, Михаил Иванович; Petrov, M. I.; "Ordering in Minerals and Alloys", international meeting(18 ; 2009 ; Sept. ; Rostov-on-Don); "Упорядочение в минералах и сплавах", международный симпозиум(12 ; 2009 ; сент. ; 10-16 ; Ростов-на-Дону, п. Лоо)
}
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19.

Анизотропия и скейлинг магнитосопротивления в текстурированном высокотемпературном сверхпроводнике Bi1.8Pb0.3Sr1.9Ca2Cu3Ox / Д. М. Гохфельд [и др.] // Физ. тверд. тела. - 2015. - Т. 57, Вып. 11. - С. 2090-2094. - Библиогр.: 29 . - ISSN 0367-3294
Аннотация: Исследовано магнитосопротивление текстурированного высокотемпературного сверхпроводника (ВТСП) Bi1.8Pb0.3Sr1.9 Ca2Cu3Ox+Ag при различных направлениях транспортного тока I и внешнего магнитного поля H относительно кристаллографических направлений ВТСП-кристаллитов. Когда I и H ориентированы вдоль плоскостей ab кристаллитов и varphi --- угол между H и I, то анизотропная часть магнитосопротивления следует функциональной зависимости sin2varphi, характерной для течения вихрей под действием силы Лоренца. Магнитосопротивление R при H, параллельном оси c кристаллитов ( H || c), больше, чем R при H || ab для обоих случаев I || c и I || ab. Коэффициент анизотропии gamma~ 2.3 оценен из скейлинга зависимостей R(H), измеренных при H || c и H || ab. Учет магнитного поля, создаваемого транспортным током, позволяет выполнить скейлинг зависимостей R(H) при различных значениях I. Предложена качественная картина протекания тока вдоль оси c кристаллитов в текстурированном ВТСП.

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Переводная версия Magnetoresistance anisotropy and scaling in textured high-temperature superconductor Bi1.8Pb0.3Sr1.9Ca2Cu3Ox [Текст] / D. M. Gokhfel’d [et al.] // Phys. Solid State : MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57 Is. 11.- P.2145-2150

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

Доп.точки доступа:
Гохфельд, Денис Михайлович; Gokhfeld, D. M.; Балаев, Дмитрий Александрович; Balaev, D. A.; Семенов, Сергей Васильевич; Semenov, S. V.; Петров, Михаил Иванович; Petrov, M. I.
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20.

Анизотропия магниторезистивных свойств гранулярных высокотемпературных сверхпроводников как результат сжатия магнитного потока в межгранульной среде / С. В. Семенов [и др.] // Физ. тверд. тела. - 2017. - Т. 59, Вып. 7. - С. 1267–1273, DOI 10.21883/FTT.2017.07.44585.417. - Библиогр.: 26. - Исследование выполнено при финансовой поддержке РФФИ, Правительства Красноярского края, Краевого фонда наука в рамках научного проекта N 16-48-243018. DOI: 10.21883/FTT.2017.07.44585.417. . - ISSN 0367-3294
Аннотация: С целью выяснения причины известной анизотропии магниторезистивных свойств гранулярных высокотемпературных сверхпроводников (ВТСП), связанной со взаимной ориентацией магнитного поля H и транспортного тока j, исследовано поведение гистерезисных зависимостей магнитосопротивления R(H) образца ВТСП иттриевой системы при перпендикулярной ( H normal j) и параллельной ( H|| j) конфигурациях. На основании концепции эффективного поля в межгранульных границах (через которые туннелируют носители сверхпроводящего тока) проведен анализ гистерезисных зависимостей R(H). Величина параметра, характеризующего эффективную степень сжатия магнитного потока в межгранульной среде, для перпендикулярной конфигурации оказалась примерно в 2 раза больше, чем для параллельной. Такой подход хорошо объясняет наблюдаемую многими авторами анизотропию магниторезистивных свойств гранулярных ВТСП (включая и данные по температурным зависимостям сопротивления в области резистивного перехода).

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Переводная версия Anisotropy of the magnetoresistive properties of granular high-temperature superconductors resulting from magnetic flux compression in the intergrain medium [Текст] / S. V. Semenov [et al.] // Phys. Solid State : Maik Nauka-Interperiodica Publishing, 2017. - Vol. 59 Is. 7.- P.1291-1297

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН, Красноярск, Россия
Сибирский федеральный университет, Красноярск, Россия

Доп.точки доступа:
Семенов, Сергей Васильевич; Semenov, S. V.; Балаев, Дмитрий Александрович; Balaev, D. A.; Почекутов, М. А.; Pochekutov M. A.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.
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