Scaling properties of the anisotropic magnetoresistivity of Bi2Sr2CaCu2O8 thin films below Tc

Abstract

We report on scaling properties of the angular dependence of the magnetoresistance of ${\mathrm{Bi}}_2$ ${\mathrm{Sr}}_2$ ${\mathrm{CaCu}}_2$ ${\mathrm{O}}_8$ thin films below ${\mathit{T}}_{\mathit{c}}$=88 K up to 20 T. As recently suggested by Kes et al. [Phys. Rev. Lett. 64, 1063 (1990)], the dissipation is only related to the transverse field component along the c axis. Breakdown of the scaling appears between the angle when the field is parallel to the superconducting planes and a critical angle (∼1°), which reflects the finite anisotropy of the compound. We interpret the dissipation in the tilted magnetic-field orientation as resulting from the easy motion of vortex kinks along the ${\mathrm{CuO}}_2$ planes.