OUT-OF-PLANE MAGNETORESISTIVITY FOR FIELDS PARALLEL TO THE C-AXIS IN SINGLE-CRYSTALLINE (LA1-XSRX)2 CUO4

The c-axis magnetoresistivity as a function of temperature T and field H for fields parallel to the c axis is experimentally investigated fo r single-crystalline (La1-xSrx)2CuO4 (X = 0.068). It is argued that th e observed Lorentz force free magnetoresistive phenomena cannot be acc ounted for by previously considered mechanisms. By contrast, they can be explained by the extended Josephson coupling model, which takes int o account both effective thermal energy and anisotropy. Based on this extended model, it is shown that all the magnetoresistivity curves obt ained in H//I//c at various constant temperatures could be nicely scal ed onto a single curve without any adjustable parameter in a wide tran sition region.