Josephson effects in Y1Ba2Cu3O7−<i>x</i> point contacts
B. I. VerkinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov; Scientific Production Combine “Monokrystallreaktiv,” Khar’kovС. И. БондаренкоPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov; Scientific Production Combine “Monokrystallreaktiv,” Khar’kovV. M. DmitrievPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov; Scientific Production Combine “Monokrystallreaktiv,” Khar’kovA. LukashenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov; Scientific Production Combine “Monokrystallreaktiv,” Khar’kovV. P. SeminozhenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov; Scientific Production Combine “Monokrystallreaktiv,” Khar’kovA. A. ShabloPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov; Scientific Production Combine “Monokrystallreaktiv,” Khar’kov
ABI
Аннотация
The Josephson properties of pressure point contacts of Y1Ba2Cu3O7−x ceramics are investigated experimentally. It is shown that the Josephson properties of such contacts are preserved up to Tc of the contacts, which is close to liquid nitrogen temperatures for some samples investigated. Examination of the temperature dependence of the critical and excess currents permits a conclusion about the similarity of ceramic–ceramic pressure point contacts with S–N–S junctions.
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