Abstract
High-frequency losses in the strongly anisotropic layered superconductor Bi2Sr2CaCu2O8 are measured at 600 MHz under a magnetic field rocking about the ab plane. Anomalies in losses and hysteretic phenomena are found while performing periodic rocking, i.e., cycling the magnetic field component normal to the sample surface. Based on these observations, conclusions are drawn about the nature of magnetic-flux penetration into the superconductor. It is found that, in the range between 60 K and T c , the dynamics of magnetic-flux vortex lines normal to the ab plane in the presence of a constant magnetic field applied parallel to this plane is governed by the critical penetration field H ⊥*c and the surface barrier in the presence of thermally activated vortex motion (giant flux creep). The dependences of H ⊥* c1 and the characteristic field of the surface barrier on the magnitude of the parallel magnetic field are measured.
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Translated from Fizika Tverdogo Tela, Vol. 46, No. 8, 2004, pp. 1360–1365.
Original Russian Text Copyright © 2004 by Berezin, Tulin.
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Berezin, V.A., Tulin, V.A. Dynamics of the magnetic flux component normal to the layers of Bi2Sr2CaCu2O8 in a tilted field. Phys. Solid State 46, 1398–1403 (2004). https://doi.org/10.1134/1.1788769
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DOI: https://doi.org/10.1134/1.1788769