ANOMALIES OF THE PHOTO-RESPONSE AND THERMAL-BOUNDARY RESISTANCE OF A YBACUO YSZ STRUCTURE

The photoresponse of a YBaCuO/ZrO2 bolometric structure was measured u nder modulated (lambda = 630 nm) and pulsed (tau almost-equal-to 7-8 n s; lambda = 337 nm) laser excitation. The shape of the measured photor esponse was interpreted by a thermal model; nevertheless, the pulse am plitude for vanishing YBaCuO film resistance was 5-6 times greater tha n predicted; the thermal boundary resistance R(Bd) between YBaCuO and YSZ was evaluated congruent-to 10(-2) K X cm2/Watt, which is considera bly larger than estimated theoretically for the similar situation of Y BaCuO/MgO [5].