Driven weak to strong pinning crossover in partially nanopatterned 2H-NbSe2 single crystal

Details Driven weak to strong pinning crossover in partially nanopatterned 2H-NbSe2 single crystal Driven weak to strong pinning crossover in partially nanopatterned 2H-NbSe2 single crystal

2010-05-31

arxiv.org/abs/1005.5641v1

Supercond. Sci. Technol. 23 (2010) 075002

Physics

Condensed Matter

Superconductivity

15 pages with 5 figures

Scientific paper

10.1088/0953-2048/23/7/075002

Investigations into the heterogeneous pinning properties of the vortex state created by partially nano-patterning single crystals of 2H-NbSe2 reveal an atypical magnetization response which is significantly drive dependent. Analysis of the magnetization response shows non-monotonic behavior of the magnetization relaxation rate with varying magnetic field sweep rate. With all the patterned pinning centers saturated with vortices, we find that the pinning force experienced by the vortices continues to increase with increasing drive. Our studies reveal an unconventional dynamic weak to strong pinning crossover where the flow of the vortex state appears to be hindered or jammed as it is driven harder through the interstitial voids in the patterned pinning lattice.

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