Evaluation of the lattice matching effect on critical current density for surface coated YbBa2Cu3O7

Yb-123 superconducting layer was coated on (Gd0.92Er0.08)2O3-buffered Ni substrate with a 100% lattice match. Ni was annealed to get a biaxially textured substrate. Both buffer layer and superconducting layer were coated with a non-vacuum sol–gel method. Coated film was characterized by means of XRD, ESEM. Tc and Ic of films are measured by the direct current 4-probe method. Critical transition temperature and critical current density of the superconductor were measured as 81 K and 1×104 A/cm2, respectively.