Magnetic properties of irradiated quasi 2D type II superconductors

Abstract

Persistent scaling behavior of magnetization in layered high Tc superconductors

with short-range columnar defects is explained within the Ginzburg-Landau theory. In the

weak field region, the scaling function differs from that of a clean sample and the

critical temperature is renormalized due to defects. In the strong field region, defects

are effectively suppressed and the scaling function, as well as the critical temperature

are the same as in a clean superconductor. This picture is consistent with recent

experimental results.