CURRENT-DEPENDENT KINETIC INDUCTANCE OF SUPERCONDUCTING YBACNO THIN-FILMS

Current-dependent kinetic inductance of superconducting thin films is studied experimentally. A measurement circuit for the precise measurem ent of the kinetic inductance is developed for this purpose. The volta ge across an inductance made of YBaCuO meander line is measured as a f unction of applied current. From the nonlinear relationship between th e voltage and the current measured in the experiment, dependence of th e kinetic inductance on the current is obtained. The experimental resu lts are consistent with the theoretical results predicted from the Gin zburg-Landau (GL) theory.