On the origin of the irreversibility line in thin YBaCuO7 films with and without columnar defects

R. Prozorov, M. Konczykowski, B. Schmidt +4

We report on measurements of the angular dependence of the irreversibility temperature $T_{irr}(\theta )$ in $YB{a}_{2}C{u}_3{O}_{7-\delta }$ thin films, defined by the onset of a third harmonic sign…