Author/Authors :
Johansen، نويسنده , , T.H. and Shantsev، نويسنده , , D.V. and Olsen، نويسنده , , إ.A.F. and Roussel، نويسنده , , M. and Pan، نويسنده , , A.V. and Dou، نويسنده , , S.X.، نويسنده ,
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.
Keywords :
superconductor , dendrites , Magnetic flux , Nucleation sites