EXTENSION OF THE 3D-SCALING RULE FOR RESISTIVITY AS A FUNCTION OF MAGNETIC-FIELD AND ITS ORIENTATION FOR ANISOTROPIC HIGH-TEMPERATURE SUPERCONDUCTORS

The measurement of the c-axis resistivity of single crystalline La1.86 Sr0.14CuO4 is performed at different constant temperatures as a functi on of magnetic field H and angle theta between H and the ab-plane. It is shown that the 2D- or 3D-scaling rule proposed for high-T-c superco nductors does not work well for the present system. Taking into accoun t unusual vortex dynamics in the high-T-c systems, an extension is mad e to the 3D-scaling rule developed on the basis of the effective-mass model. Based on this extended rule, it is shown that at each given tem perature the observed resistivity as a function of H and theta could b e consistently scaled onto the corresponding Lorentz-force-free magnet oresistivity curves directly measured in H parallel to I parallel to c .