Regensburg 2007 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 8: Superconductivity - Poster Session
TT 8.21: Poster
Montag, 26. März 2007, 14:00–17:45, Poster A
Nonlinear Temperature Dependence of the Upper Critical Magnetic Field for Magnesium Diboride — •Thomas Koch3, Thomas Schimmel3,4, Maria Palistrand2, Vladimir Zdravkov1, and Anatolie Sidorenko1 — 1Institute of Electronic Engineering and Industrial Technologies, ASM, MD-2028 Kishinev, Moldova — 2Institute of Applied Physics, ASM, MD-2028 Kishinev, Moldova — 3Institute of Nanotechnology, Forschungszentrum Karlsruhe D-76021 Karlsruhe, Germany — 4Institute of Applied Physics, University of Karlsruhe D-76128 Karlsruhe, Germany
The temperature dependence of the upper critical magnetic field, Hc_2(T), for MgB_2 films was investigated. As one result a nonlinear behavior of Hc_2(T) shown in the positive curvature in the H(T) plots is found to be an intrinsic property of the novel superconducting material. The experimental results are compared with the calculations made within the theoretical model of inter-band interaction for multi-band superconductors.[1]
Reference 1. M. E. Palistrant, Upper Critical Field Hc_2 in Two-Band Superconductors, Mold.Journ. Phys.Sci 3 (2004) 61