Jh. Claassen et al., Comparison of microwave and mutual inductance measurements of the inductive nonlinearity of HTS thin films, SUPERCOND S, 12(11), 1999, pp. 714-716
A quadratic dependence of penetration depth on supercurrent density may be
observed both by an inductive measurement on unpatterned films and by a mic
rowave measurement of third-harmonic generation in coplanar waveguide. Resu
lts for the two methods are compared for a series of YBCO films. We find go
od agreement between the two measurements.