[Zurück]

F. Hengstberger, M. Eisterer, H. W. Weber:
"Numerical extension of the power law J_c(B) to zero field in thin superconducting films";
Physica C: Superconductivity and its Applications, 470 (2010), S. 1041 - 1042.

Numerical simulations of the current and field distribution in thin superconducting films are carried out
for a given material law J_c(B) and as a function of the applied field H, taking the sample´s self-field into
account. The dependence of the critical current density on the applied field J_c(H) is computed for comparison
with experiment, considering the geometry of transport measurements.
We show that extrapolating the high-field power law J_c α B_-α to the lowest fields results in a finite critical
current at zero applied field J_c(H = 0), despite the singularity of J_c(B). Moreover, particular features of
the experiment, such as a low field plateau in J_c(H), are reproduced and found to be determined by the
self-field.

Numerical simulation, Field dependence, Critical current density, Thin films

http://dx.doi.org/10.1016/j.physc.2010.01.048

http://publik.tuwien.ac.at/files/PubDat_192028.pdf