Vanishing contact resistance on polycrystalline YBa2Cu3O7-x

Wieck, A. D.
March 1988
Applied Physics Letters;3/21/1988, Vol. 52 Issue 12, p1017
Academic Journal
The preparation and characterization of gold contacts on polycrystalline YBa2Cu3O7-x ceramics that carry high currents and exhibit contact resistances of only 50 mΩ at room temperature are reported. By cooling the sample this resistance remains essentially constant until the superconducting transition temperature, Tc[bar_over_tilde:_approx._equal_to]89 K, is reached. At Tc the contact resistance decreases like the resistivity of YBa2Cu3O7-x, reaching at T


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