Abstract
We investigate anisotropic resistivity due to planar pinning centers and to anisotropic viscosity of vortex motion, taking account of Hall effects. Because of the anisotropy of pinning and viscosity, both longitudinal resistivity /spl rho//sub /spl par// (induced parallel to a transport current J) and transverse resistivity /spl rho//sub /spl perp// (perpendicular to J) depend on an angle /spl theta/ between the direction of J and the pinning planes. The /spl theta/ dependence of the resistivities is affected by the anisotropy of viscosity, pinning strength, and Hall effects. It is found that /spl rho//sub /spl par// and /spl rho//sub /spl perp// can be enhanced by the pinning effects.
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