Superconducting junctions formed by a metal and the ceramic Y–Ba–Cu–O in an rf field
O. P. BalkashinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , KharkovI. K. YansonPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , KharkovYu. A. PilipenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , Kharkov
ABI
Abstract
Current–voltage characteristics of junctions formed by a superconductor (Ta, Sn) or a normal metal (Cu) with the superconducting ceramic Y–Ba–Cu–O are measured. Under the effect of rf radiation, current steps are formed due to the transient Josephson effect. All irradiated junctions have relatively low values of critical and excess currents and a small limiting voltage of Josephson steps. For copper–ceramic junctions, the current steps have a finite slope and are observed right up to the temperature 77 K.
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