Dendritic flux penetration in Pb films with a periodic array of antidots

Details Dendritic flux penetration in Pb films with a periodic array of antidots Dendritic flux penetration in Pb films with a periodic array of antidots

2004-09-15

arxiv.org/abs/cond-mat/0409391v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.71.104506

We explore the flux-jump regime in type-II Pb thin films with a periodic array of antidots by means of magneto-optical measurements. A direct visualization of the magnetic flux distribution allows to identify a rich morphology of flux penetration patterns. We determine the phase boundary $H^*(T)$ between dendritic penetration at low temperatures and a smooth flux invasion at high temperatures and fields. For the whole range of fields and temperatures studied, guided vortex motion along the principal axes of the square pinning array is clearly observed. In particular, the branching process of the dendrite expansion is fully governed by the underlying pinning topology. A comparative study between macroscopic techniques and direct local visualization shed light onto the puzzling $T-$ and $H-$independent magnetic response observed at low temperatures and fields. Finally, we find that the distribution of avalanche sizes at low temperatures can be described by a power law with exponent $\tau \sim 0.9(1)$.

Affiliated with

Also associated with

No associations

Rating

Dendritic flux penetration in Pb films with a periodic array of antidots does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dendritic flux penetration in Pb films with a periodic array of antidots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dendritic flux penetration in Pb films with a periodic array of antidots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-621155