High T.sub.c superconductor contact unit having low interface resistivity

A superconducting apparatus, comprising:

• a superconductor formed from high-T.sub.c superconducting material and having at least one surface;
• and
• an electrically conductive element formed from an inert metal with said element having at least a firs surface portion in contact with said superconductor surface to form a contact unit therewith, with the contact resistivity between said superconductor surface and said first surface of said electrically conductive element including a range of between <10.sup.-8 .OMEGA.-cm.sup.2 and 10.sup.-10 .OMEGA.-cm.sup.2.

A superconducting apparatus, comprising:

• a superconductor formed from high-T.sub.c oxide superconducting material and having at least one surface in a substantially non-degraded state;
• and
• an electrically conductive element formed from a noble metal with said element having fist and second surface portions with said first surface portion in contact with said superconductor surface to form a contact unit therewith and with said second surface portion adapted to be contactable with electrically conductive means to thereby establish an electrical connection to said electrically conductive element at said second surface portion, said thus formed electrically conductive element having been annealed with oxygen so that the contact resistivity between said superconductor surface and said first surface of said electrically conductive element including a range of between <10 10.sup.-8 .OMEGA.-cm.sup.2 and 10.sup.-10 .OMEGA.-cm.sup.2.