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Y-Ba-Cu-O/Au/Nb ramp-type Josephson junctions

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5 Author(s)
H. J. H. Smilde ; MESA Res. Inst., Twente Univ., Enschede, Netherlands ; H. Hilgenkamp ; G. J. Gerritsma ; D. H. A. Blank
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Ramp-type junctions connecting the d-wave superconductor YBa2 Cu3O7-δ and the s-wave superconductor niobium are fabricated using a thin gold layer as a chemical barrier. High critical current densities exceeding 5 kA/cm2 are obtained. The normal state resistivity (RnA) values of the junctions are of the order of 0.1 μΩ cm2. The magnetic field behavior of the critical current of junctions oriented in the [10l]- and in the [11l]-direction of the YBa2Cu3 O7-δ is explained in terms of a predominant d(x 2-y2) order parameter in the high-Tc superconductor

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:11 ,  Issue: 1 )