Abstract
Investigations into the heterogeneous pinning properties of the vortexstate created by partially nanopatterning single crystals of 2H-NbSe2 reveal an atypical magnetization response which is significantly drive dependent. Analysisof the magnetization response shows non-monotonic behavior of the magnetizationrelaxation rate with varying magnetic field sweep rate. With all the patterned pinningcenters saturated with vortices, we find that the pinning force experienced by the vorticescontinues to increase with increasing drive. Our studies reveal an unconventional dynamicweak to strong pinning crossover where the flow of the vortex state appears to be hinderedor jammed as it is driven harder through the interstitial voids in the patterned pinninglattice.
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