| When the YBCO growing on the SrTiO3 substrate tilt extensionally, it will make aα-Angle between the surface nonnals of YBCO film and the c axis of YBCO. If the laser light incidence the surface of the YBCO along the z axis, the z axis with a laser induced thermoelectric voltage produce. The thermoelectric material is called atom layer thermoelectric materials. This laser induced thermoelectric voltage (LITV) devices has a fast response (from ns to ps), response spectrum broad (spectral range from uv to infrared), high sensitivity, the refrigeration detection, high stability, easy integration, low-cost characteristics, it has a very broad application prospect. We studied the preparation of YBCO, growth conditions, and the influence of different conditions on the film in this paper.YBCO was prepared by solid-phase and different sintering temperature was studied, YBCO preparated under the temperature of 890,900,910,920and 930℃, was analyzed by the XRD. We found that the preparation of YBCO under temperature 920℃miscellaneous phase less and the quality is best.YBCO superconducting thin film is processed by direct current sputtering. We have researched the nature of the thin film by the different gas pressure,oxygen argon ratios, film thickness and annealing temperature, by the XRD,found that total pressure for 40Pa, when oxygen ratios for 1:2, thickness of argon for 1μm, annealing temperature of 800℃, are the best film growth conditions.On the basis of the above,1μm YBCO film thickness was grown on the SrTiO3 which inclined angle is 20°, and have made it into a laser induced thermoelectric voltage devices.Design the measurement system, and the results show that the measurement LITV a linear relationship with the laser energy. |
