FIZIKA A 4 (1995) 3, 511-518

TWO-DIMENSIONAL VORTEX PLASMA IN Bi₂Sr₂CaCu₂O_x SINGLE CRYSTALS IN THE VICINITY OF T_c

DINKO BABIĆ, BORAN LEONTIĆ and JOVICA IVKOV^a
Department of Physics, Faculty of Science, University of Zagreb, POB 162, 10001 Zagreb, Croatia
^aInstitute of Physics, POB 304, 10001 Zagreb, Croatia

Dedicated to Professor Mladen Paić on the occasion of his 90^th birthday

Received 1 June 1995

Quantitative analysis of results of measurements of magnetoresistance of Bi₂Sr₂CaCu₂O_x single crystals for magnetic fields 0.2-0.8 T, in the temperature interval 78.5-84 K has been made. For temperatures lower than 81 K the dissipation is predominantly determined by the suppression of the long-range superconducting order, whereas closer to T_c the flux-flow contribution becomes significant. We obtain very good agreement between the experiment and the model in which two dissipation mechanisms are additive.

UDC 538.945
PACS 74.72.-Hs, 72.15.Gd, 74.40.+k

Copyright by The Croatian Physical Society
For problems or questions please contact fizika@fizika.hfd.hr