Volume 41, Number 2, January II 1998
|Page(s)||207 - 212|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Upper critical field in : Magnetotransport vs. magnetotunneling
Institute of Experimental Physics, Slovak Academy of
Sciences, SK-04353 Košice, Slovakia
2 Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, B.P. 166, F-38042 Grenoble Cedex 9, France
3 Laboratoire d'Etudes des Propriétés Electroniques des Solides, Centre National de la Recherche Scientifique, B.P. 166, F-38042 Grenoble Cedex 9, France
Accepted: 27 November 1997
Elastic tunneling is used as a powerful direct tool to determine the upper critical field in the high-Tc oxide . The temperature dependence of Hc2 inferred from the tunneling follows the Werthamer-Helfand-Hohenberg prediction for type-II superconductors. A comparison will be made with resistively determined critical-field data.
PACS: 74.60.Ec – Mixed state, critical fields, and surface sheath / 74.25.Dw – Superconductivity phase diagrams / 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects
© EDP Sciences, 1998
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