Avalanche-driven fractal flux distributions in NbN superconducting films

Details Avalanche-driven fractal flux distributions in NbN superconducting films Avalanche-driven fractal flux distributions in NbN superconducting films

2004-11-18

arxiv.org/abs/cond-mat/0411489v1

Appl. Phys. Lett. 87, 042502 (2005)

Physics

Condensed Matter

Superconductivity

3 pages, 5 figures

Scientific paper

10.1063/1.1992673

Flux distributions in thin superconducting NbN films placed in a perpendicular magnetic field have been studied using magneto-optical imaging. Below 5.5 K the flux penetrates in the form of abrupt avalanches resulting in dendritic structures. Magnetization curves in this regime exhibit extremely noisy behavior. Stability is restored both above a threshold temperature T* and applied field H*, where H* is smaller for increasing field than during descent. The dendrite size and morphology are strongly T dependent, and fractal analysis of the first dendrites entering into a virgin film shows that dendrites formed at higher T have larger fractal dimension.

Affiliated with

Also associated with

No associations

Rating

Avalanche-driven fractal flux distributions in NbN superconducting films 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 Avalanche-driven fractal flux distributions in NbN superconducting films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Avalanche-driven fractal flux distributions in NbN superconducting films will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-257877