ACTIVATION-ENERGIES IN THE VORTEX LIQUID-STATE OF BULK (BI1.6PB0.4)(SR1.8BA0.2)CA2CU3OY SUPERCONDUCTOR

Authors
POP AV DELTOUR R CIURCHEA D HARABOR A ILONCA G COLDEA S
Citation
Av. Pop et al., ACTIVATION-ENERGIES IN THE VORTEX LIQUID-STATE OF BULK (BI1.6PB0.4)(SR1.8BA0.2)CA2CU3OY SUPERCONDUCTOR, Modern physics letters B, 10(29), 1996, pp. 1453-1460
Citations number
30
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter","Physycs, Mathematical
Journal title
Modern physics letters B → ACNP
ISSN journal
02179849
Volume
10
Issue
29
Year of publication
1996
Pages
1453 - 1460
Database
ISI
SICI code
0217-9849(1996)10:29<1453:AITVLO>2.0.ZU;2-W
Abstract
Magnetoresistivity measurements as a function of temperature, rho(B, T ) in applied magnetic field B up to 0.7 T have been carried out on a s ample of the 110 K phase of the (Bi, Pb)-(Sr, Ba)-Ca-Cu-O system. The d rho/dT versus T curves in an applied magnetic field reveal the intra - and intergranular transitions. The behavior of these transitions as function of the magnetic field is presented. Thermally activated flux motion has been studied. The activation energy is proportional to (1 - T/T-c) In B, and suggests a 2D-state in which the dissipation is domi nated by the cutting mechanism in an entangled flux liquid.