Figure 7
From: Glassy Dynamics in a heavy ion irradiated NbSe2 crystal

Creep in irradiated NbSe2 crystal. (a) Creep rate (S) versus magnetic field orientation (θH) in the irradiated NbSe2 crystal and (inset) the extracted effective pinning energy U*. (b) Comparison of field-dependent S and (c,d) temperature-dependent S when the field is aligned with the columnar defects versus the c-axis. The solid black lines are linear fits to the low temperature data. The dotted grey curve in c is data for the pristine sample when the field is aligned with the c-axis.