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Variation with density of the transport properties of YBaCuO superconductors
Authors:E. Babić  Ž. Marohnić  M. Prester  N. Brničević
Affiliation:1. Institute of Physics of the University , P.O. Box 304, Zagreb, Yugoslavia;2. Department of Physics Faculty of Science , The University , POB 162, 41000, Zagreb, Yugoslavia;3. Institute of Physics of the University , P.O. Box 304, Zagreb, Yugoslavia;4. Institute “Ruder Bo?kovi?” , P.O. Box 1016, Zagreb, Yugoslavia
Abstract:Abstract

The dependence of the normal-state resistivity, resistive superconducting transition (T c, ΔT c), and of the upper critical-field slope (dH c2/dT|T=Tc) on density has been investigated for several YBa2Cu3O9-x(x?2.1) samples. The resistivity decreases rapidly with increasing density, whereas T c and ΔT c are rather insensitive to a change in density. dH c2/dT|Tc depends sensitively on the preparation conditions. The implications of these results both for the evaluation of the parameters relevant to the understanding of the nature of superconductivity and for the technological applications of granular superconductors are briefly discussed.
Keywords:
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