Laser patterning and critical current measurements of submicrometer lines of Y-Ba-Cu-O

Abstract
Superconducting strips of 0.6 μm width were fabricated by direct laser writing on mirror‐like Y‐Ba‐Cu‐O thin films on various substrates. These films were grown by laser deposition without post‐annealing. Laser ablation etching had no effect on the Tc and Jc until the lines were Tc. The critical current densities for all patterned lines were measured to be ∼4×106 A/cm2 at 20 ° K.