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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfel'd D. M., Balaev D. A., Semenov S. V., Petrov M. I.
Заглавие : Magnetoresistance anisotropy and scaling in textured high-temperature superconductor Bi1.8Pb0.3Sr1.9Ca2Cu3Ox
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 11. - P.2145-2150. - ISSN 1063-7834, DOI 10.1134/S1063783415110128
Примечания : Cited References: 29
Предметные рубрики: ELECTRIC-POWER APPLICATIONS
TRANSPORT CRITICAL-CURRENT
T-C
SINGLE-CRYSTALS
TAPES
DISSIPATION
BOUNDARIES
DENSITY
FIELD
Аннотация: The magnetoresistance of the textured high-temperature superconductor (HTSC) Bi1.8Pb0.3Sr1.9Ca2Cu3Ox + Ag has been studied at different directions of the transport current I and external magnetic field H with respect to crystallographic directions of HTSC crystallites. When I and H are oriented along the ab planes of crystallites and φ is the angle between H and I, the anisotropic part of the magnetoresistance follows the functional dependence sin2φ, which is characteristic of vortex flows under Lorentz forces. The magnetoresistance R at H parallel to the c axis of crystallites (H || c) is higher than R at H || ab for both cases of I || c and I || ab. The anisotropy coefficient γ ≈ 2.3 has been estimated from the scaling of the dependences R(H) measured at H || c and H || ab. The inclusion of the magnetic field induced by the transport current allows scaling of the dependences R(H) at different values of I. A qualitative picture of the current flow along the c axis of crystallites in the textured HTSC has been proposed. © 2015, Pleiades Publishing, Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Prus A. G., Shaikhutdinov K. A., Petrov M. I.
Заглавие : Angular dependence of the magnetoresistance in Y3/4Lu1/4Ba2Cu3O7-CuO composites at 77 K
Разночтения заглавия :авие SCOPUS: Angular dependence of the magnetoresistance in Y3/4Lu 1/4Ba2Cu3O7-CuO composites at 77 K
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2006. - Vol. 32, Is. 8. - P677-679. - ISSN 1063-7850, DOI 10.1134/S1063785006080128
Примечания : Cited References: 16
Предметные рубрики: CERAMIC SUPERCONDUCTORS
MAGNETIC-FIELD
MICROSTRUCTURE
BOUNDARIES
TRANSPORT
MOTION
FILMS
Аннотация: The angular dependence of the magnetoresistance of polycrystalline Y3/4Lu1/4Ba2Cu3O7-CuO composites has been studied. These composites represent a system of Josephson junctions and exhibit a large magnetoresistance at 77 K. In addition to the isotropic component, there is the angle-dependent component proportional to sin(2)theta, where theta is the angle between the directions of current and magnetic field. This behavior is unambiguous evidence for the process of flux flow in the Josephson medium realized in the composites.
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