Regensburg 2007 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 8: Superconductivity - Poster Session
TT 8.47: Poster
Montag, 26. März 2007, 14:00–17:45, Poster A
Comparative experimental and theoretical study of flux dynamics in homogeneous high-Tc superconducting films — Carolina Romero-Salazar1, Christian Jooss1, and •Omar Hernandez-Flores2 — 1Institut fuer Materialphysik, Friedrich Hund Platz 1, 37077 Goettingen, Germany — 2Instituto de Fisica, Universidad Autonoma de Puebla, Apdo. Post. J-48, Puebla, Mexico
We investigate the magnetic flux, current and electric field distributions for flux creep, in a nearly single crystalline thick YBaCuO film via magneto-optical imaging, employing a method presented recently [1].
Additionally, we calculate numerically the induced electric field distributions in finite thickness films, in perpendicular geometry and flux creep regime. The nonlocal model is based on the flux distribution in the critical state and enables us to investigate the geometry-sample dependence of physical properties of superconducting films.
A quantitative and qualitative agreement between theoretical and experimental distributions was obtained. Understanding the vortex dynamics in homogeneous superconducting films, provides a necessary background to study inhomogeneous materials.
[1] Ch. Jooss and V. Born Phys. Rev. B 73, 094508 (2006).