DEPOSITION OF LARGE-AREA YBA2CU3O7 SUPERCONDUCTING FILMS BY LASER-SCANNING ABLATION

A method of laser scanning ablation for producing large area YBa2Cu3O7 superconducting films is presented. Uniformly thick, large area YBa2C u3O7 superconducting films were obtained on 36-mm-diam (100) LaAlO3 su bstrates with a lens rotating radius of 9 mm. The T(c)'s of the film c enter and edge were all 92 K and transition widths were less than 1 K. X-ray diffraction studies showed complete c-axis orientation of the f ilms. The critical current density of 3.6 X 10(6) A/cm2 in zero field was measured at 77 K. A power law of voltage V versus current I of the YBa2Cu3O7 superconducting microbridge, V = 1.363 X 10(-32)I11.224 49 was achieved.