Title

Reproducible Nucleation Sites for Flux Dendrites in MgB2

RIS ID

22809

Publication Details

Johansen, T. H., Shantsev, D., Olsen, A., Roussel, M., Pan, A. V. & Dou, S. X. (2007). Reproducible Nucleation Sites for Flux Dendrites in MgB2. Surface Science, 601 (24), 5712-5714.

Abstract

Magneto-optical imaging was used to study dendritic flux penetration in films of MgB2. By repeating experiments under the same external conditions, reproducible features were seen in the pattern formation; dendrites tend to nucleate from fixed locations along the edge. However, their detailed structure deeper inside the film is never reproduced. The reproducibility in nucleation sites is explained as a result of edge roughness causing field hot spots.

Grant Number

ARC/DP0770205

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