Publication
One of the important problems for electrical applications of high-temperature superconductors is the contact resistance between the superconductor and a normal metallic wire. In this paper, the authors report a simple method of contact preparation for high-T//c copper-oxide materials (Y-Ba-Cu-O). Based on high-temperature metallization, it reduces the contact resistance from typically 1 OMEGA mm** minus 2 down to APP 1STH 10 mu OMEGA mm minus 2 (77 K), and makes it possible to measure the critical current of a bulk sample, with current densities in the contact area in excess of 2000 A cm minus **2.
Pierluigi Bruzzone, Kamil Sedlák, Nikolay Bykovskiy, Ortensia Dicuonzo