T. Nagashima et al., INTERPLANE AND INPLANE ELECTROMAGNETIC RESPONSE OF YBCO THIN-FILMS INTHE MILLIMETER-WAVE REGION AND ITS DEPENDENCE ON WEAK MAGNETIC-FIELD, Physica. C, Superconductivity, 293(1-4), 1997, pp. 283-287
The temperature dependence of the inter-and in-plane complex conductiv
ities of YBCO thin films in the millimeter-wave region (75 similar to
170 GHz) has been measured by using a Mach-Zehnder type interferometri
c spectrometer. Furthermore, the weak magnetic field dependence of the
relative change of the London penetration depth is also studied. The
results of these measurements are consistent with the recent theoretic
al predictions assuming d-wave pairing. (C) 1997 Elsevier Science B.V.