Magnetic Aftereffects in High Tc Superconducting Thin Films

Abstract
In superconducting oxide films, strong magnetic aftereffects are observed. They are considered to be due to creep of trapped magnetic fluxoids. The aftereffects reveal the logarithmic time dependence. For TlBaCaCuO film, an activation energy of the effects can be estimated to be 0.03 eV in an external field of 100 Oe.