Reproducible Nucleation Sites for Flux Dendrites in MgB2

Authors

T. H. Johansen, University of OsloFollow
D. V. Shantsev, University of Oslo
A.A.F Olsen, University of Oslo
M. Roussel, University of WollongongFollow
A. V. Pan, University of WollongongFollow
S. X. Dou, University of WollongongFollow

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

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205