Voltage pulses o f 90 V have been observed in YBazCuQOT--6 films with a tilted orientation when they are illuminated by pulsed laser at room temperature. The signals result from the anisotropy o f thermoelectricity in the films. The thermoelectric signals related to the tilted angle are linear to the laser power and wavelength-independent. It is shown that the response of films to the mode-locked laser has a risetime less than 1 ns and width less than 20ns. The films with the superconducting transition temperature o f 90K were prepared by'laser ablation.

The bulk superconductors of the Bi-Sr-Ca-Cu-0 system with resistance close to zero at the temperature above llOK have been prepared by solidstate reaction techniques. The onset of. transition is 125K. and the resistance of the bulk samples has a sharp drop ('b98%) near the Tc and i S C l O S e t o zero at 111K. Samples show a good stability. It has been implied that completely cutting off the "resistive tail" of this bulk superconductors should be possible.