caa a22 4500 445380039 CHVBK 20180317143014.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10948-011-1166-9 doi (NATIONALLICENCE)springer-10.1007/s10948-011-1166-9 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 [Elektronische Daten] [D. Balaev, S. Popkov, S. Semenov, A. Bykov, E. Sabitova, A. Dubrovskiy, K. Shaikhutdinov, M. Petrov] 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−δ (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<102 Oe only, while standard measurements of R(T) dependences in magnetic field range H>102 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. Springer Science+Business Media, LLC, 2011 BSCCO nationallicence YBCO nationallicence Intergrain boundaries nationallicence Magnetoresistance nationallicence Balaev D. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut Popkov S. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut Semenov S. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut Bykov A. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut Sabitova E. Siberian Federal University, 660041, Krasnoyarsk, Russia aut Dubrovskiy A. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut Shaikhutdinov K. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut Petrov M. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/7(2011-10-01), 2129-2136 1557-1939 24:7<2129 2011 24 10948 https://doi.org/10.1007/s10948-011-1166-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-011-1166-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Balaev D. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut NATIONALLICENCE 700 1- Popkov S. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut NATIONALLICENCE 700 1- Semenov S. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut NATIONALLICENCE 700 1- Bykov A. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut NATIONALLICENCE 700 1- Sabitova E. Siberian Federal University, 660041, Krasnoyarsk, Russia aut NATIONALLICENCE 700 1- Dubrovskiy A. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut NATIONALLICENCE 700 1- Shaikhutdinov K. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut NATIONALLICENCE 700 1- Petrov M. L.V. Kirensky Institute of Physics, 660036, Krasnoyarsk, Russia aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/7(2011-10-01), 2129-2136 1557-1939 24:7<2129 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer