FORMATION OF VORTEX LINE AROUND THE GLASS-TRANSITION IN YBA2CU3O7-DELTA FILMS

Two components of current-induced electric fields in ab plane, E(x) an d E(y), have been measured simultaneously on YBCO(123) films around th e glass transition temperature T-g in magnetic fields H with component s (H-0, H-0, 0.1H(0)), where x and y axes are parallel to the directio n, of the current density and c axis, respectively. In this condition, a finite transverse field E(y) calmest equal to E(x) can be observed if the vortex lines form and move along the Lorentz force. In each H, the ratio \E(y)/E(x)\ at a low current limit, which is zero far above T-g, increases in the critical region and transfers to unity below T-g . Our results indicate that the vortices become lines with long range correlation along H direction at the vortex glass transition without r eceiving the effect of the intrinsic pinning.