FIZIKA A 4 (1995) 3, 511-518

size 210 kB

TWO-DIMENSIONAL VORTEX PLASMA IN Bi2Sr2CaCu2Ox SINGLE CRYSTALS IN THE VICINITY OF Tc

DINKO BABIĆ, BORAN LEONTIĆ and JOVICA IVKOVa
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 90th birthday

Received 1 June 1995

Quantitative analysis of results of measurements of magnetoresistance of Bi2Sr2CaCu2Ox 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 Tc 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
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