Jt. Totty et al., EFFECT OF COLUMNAR DEFECTS ON THE VORTEX DYNAMICS IN BSCCO-2212 SINGLE-CRYSTALS, Physica. C, Superconductivity, 282, 1997, pp. 2187-2188
The form of the dynamic relaxation of high quality BSCCO 2212 single c
rystals irradiated with 2.25 GeV Au ions to produce columnar defects a
long the crystallographic c-axis, is reported. It is found that below
10K, the columns do not significantly inhibit flux motion once the vor
tex density exceeds the column density. Above 10K, and at low vortex d
ensities, the columns depress the dynamic behaviour in a systematic wa
y as a function of temperature. At high vortex densities, the columns
are decreasingly effective as the temperature is raised and in a manne
r which is a non linear function of irradiation dose.