  We discuss the origin of the temperature dependence of resistivity observed
in highly oriented LaNiO_3 thin films (of thickness d) grown on SrTiO_3
substrate by a pulsed laser deposition technique. All the experimental data are
found to collapse into a single universal curve [T/T_{sf}(d)]^{3/2} for the
entire temperature interval (20K<T<300K) with T_{sf}(d) being the onset
temperature for triggering a resonant scattering of conduction electrons by
spin fluctuations in LaNiO_3/SrTiO_3 heterostructure.
