Heat Treatment Effect on the Metal Contact of High-Tc(Pb, Bi)SrCaCuO Superconductor
- 1 January 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (1R) , 33-37
- https://doi.org/10.1143/jjap.30.33
Abstract
Better metal electrode can be obtained by heat treatment which causes deeper diffusion of metal particles into the (Pb, Bi)SrCaCuO superconductor to improve contacts between metal electrodes and the sample. However, high-Tcphase of the specimen was destroyed at 700°C and the sample showed semiconducting behaviour. Low room temperature contact resistivity was obtained about 3.21×10-4(Ω-cm2) and 2.34×10-6(Ω-cm2) at 77 K for a sample with evaporating silver electrodes and annealed at 600°C for 2 hours. Non-ohmic contacts are observed for the indium and aluminum terminals.Keywords
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