T. Nagashima et al., INTERPLANE ELECTROMAGNETIC RESPONSE OF A-AXIS ORIENTED YBCO THIN-FILMS IN THE MILLIMETER-WAVE REGION AND ITS DEPENDENCE ON WEAK MAGNETIC-FIELD, Czechoslovak journal of Physics, 46, 1996, pp. 1097-1098
Temperature dependence of the complex conductivity along the c-axis is
measured on a-axis oriented YBa2Cu3O7-delta thin films in the millime
ter-wave region (110 similar to 170 GHz) by using a Mach-Zehnder type
interferometric spectrometer. Furthermore, the magnetic field dependen
ce of the relative change of the transmittance of the millimeter wave
is also studied. The results of these measurements are consistent with
the recent theoretical predictions assuming d-wave pairing.