The scaling property of the critical current density for layered structure superconductors

The dependence of the critical current density Jc upon the reduced field h and the angle α between the current and the applied magnetic field has been experimentally studied for a YBa2Cu3O7(-δ) (YBCO) epitaxial thin film in the 3D temperature region. An expression for Jc for layered structure superconductors is given. The results are discussed on the basis of the idea of a combined vortex lattice. It is pointed out that the influence of a layered structure on the critical current of YBCO thin films cannot be neglected at small angles. (author)