Influence of Antidots on Transport Characteristics of HTSC

A numerical study has been conducted on the dependencies of critical current density J
_c
of a typical high-temperature superconductor on the quantity and distribution of antidots- macroscopic circular regions of hollowed-out material. All computations have been carried out by using the Monte Carlo method within the limits of the model of a layered high-temperature superconductor. Multiple series of voltage-current characteristics of samples have been calculated for different quantities of antidots Na and columnar defects Nd. The diameter of antidots varied from 50 nm to 2 μm. The dependencies of J
_c
on the number of antidots with fixed size as well as on the size with fixed number of antidots have been plotted. The results have shown that J
_c
grows with the increasing quantity and size of antidots within the considered limits of concentrations. Average vortex configurations have been acquired for all samples to demonstrate the influence of antidots on the vortex lattice behavior.