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VOLUME 47 (1988) | ISSUE 11 | PAGE 581
The Mercerau effect in Josephson point-contact junctions based on YBa2Cu3O7-δ at nitrogen temperatures
The current-voltage characteristics of Josephson point-contact junctions based on YBa2Cu307_(5 have been studied over a broad temperature interval. Contacts of various geometries were found to exhibit interference effects in a magnetic field at nitrogen temperatures. The Mercerau oscillation frequency of a double-contact interferometer with an effective circuit diameter of ~ 8 μπ\ was found to increase upon approaching Tc because of the increase in the penetration depth of the magnetic field, λ (Τ).